| File: | build-scan/../src/basic/process-util.c |
| Warning: | line 210, column 17 Value stored to 'ans' is never read |
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| 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
| 2 | |
| 3 | #include <ctype.h> |
| 4 | #include <errno(*__errno_location ()).h> |
| 5 | #include <limits.h> |
| 6 | #include <linux1/oom.h> |
| 7 | #include <signal.h> |
| 8 | #include <stdbool.h> |
| 9 | #include <stdio.h> |
| 10 | #include <stdio_ext.h> |
| 11 | #include <stdlib.h> |
| 12 | #include <string.h> |
| 13 | #include <sys/mman.h> |
| 14 | #include <sys/mount.h> |
| 15 | #include <sys/personality.h> |
| 16 | #include <sys/prctl.h> |
| 17 | #include <sys/types.h> |
| 18 | #include <sys/wait.h> |
| 19 | #include <syslog.h> |
| 20 | #include <unistd.h> |
| 21 | #if HAVE_VALGRIND_VALGRIND_H1 |
| 22 | #include <valgrind/valgrind.h> |
| 23 | #endif |
| 24 | |
| 25 | #include "alloc-util.h" |
| 26 | #include "architecture.h" |
| 27 | #include "escape.h" |
| 28 | #include "fd-util.h" |
| 29 | #include "fileio.h" |
| 30 | #include "fs-util.h" |
| 31 | #include "ioprio.h" |
| 32 | #include "log.h" |
| 33 | #include "macro.h" |
| 34 | #include "missing.h" |
| 35 | #include "process-util.h" |
| 36 | #include "raw-clone.h" |
| 37 | #include "signal-util.h" |
| 38 | #include "stat-util.h" |
| 39 | #include "string-table.h" |
| 40 | #include "string-util.h" |
| 41 | #include "terminal-util.h" |
| 42 | #include "user-util.h" |
| 43 | #include "util.h" |
| 44 | |
| 45 | int get_process_state(pid_t pid) { |
| 46 | const char *p; |
| 47 | char state; |
| 48 | int r; |
| 49 | _cleanup_free___attribute__((cleanup(freep))) char *line = NULL((void*)0); |
| 50 | |
| 51 | assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/process-util.c" , 51, __PRETTY_FUNCTION__); } while (0); |
| 52 | |
| 53 | p = procfs_file_alloca(pid, "stat")({ pid_t _pid_ = (pid); const char *_r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "stat"); } else { _r_ = __builtin_alloca (( sizeof("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof (pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof(pid_t ) <= 8 ? 20 : sizeof(int[-2*(sizeof(pid_t) > 8)]))) + 1 + sizeof("stat")); sprintf((char*) _r_, "/proc/""%" "i""/" "stat" , _pid_); } _r_; }); |
| 54 | |
| 55 | r = read_one_line_file(p, &line); |
| 56 | if (r == -ENOENT2) |
| 57 | return -ESRCH3; |
| 58 | if (r < 0) |
| 59 | return r; |
| 60 | |
| 61 | p = strrchr(line, ')'); |
| 62 | if (!p) |
| 63 | return -EIO5; |
| 64 | |
| 65 | p++; |
| 66 | |
| 67 | if (sscanf(p, " %c", &state) != 1) |
| 68 | return -EIO5; |
| 69 | |
| 70 | return (unsigned char) state; |
| 71 | } |
| 72 | |
| 73 | int get_process_comm(pid_t pid, char **ret) { |
| 74 | _cleanup_free___attribute__((cleanup(freep))) char *escaped = NULL((void*)0), *comm = NULL((void*)0); |
| 75 | const char *p; |
| 76 | int r; |
| 77 | |
| 78 | assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/process-util.c", 78 , __PRETTY_FUNCTION__); } while (0); |
| 79 | assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/process-util.c" , 79, __PRETTY_FUNCTION__); } while (0); |
| 80 | |
| 81 | escaped = new(char, TASK_COMM_LEN)((char*) malloc_multiply(sizeof(char), (16))); |
| 82 | if (!escaped) |
| 83 | return -ENOMEM12; |
| 84 | |
| 85 | p = procfs_file_alloca(pid, "comm")({ pid_t _pid_ = (pid); const char *_r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "comm"); } else { _r_ = __builtin_alloca (( sizeof("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof (pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof(pid_t ) <= 8 ? 20 : sizeof(int[-2*(sizeof(pid_t) > 8)]))) + 1 + sizeof("comm")); sprintf((char*) _r_, "/proc/""%" "i""/" "comm" , _pid_); } _r_; }); |
| 86 | |
| 87 | r = read_one_line_file(p, &comm); |
| 88 | if (r == -ENOENT2) |
| 89 | return -ESRCH3; |
| 90 | if (r < 0) |
| 91 | return r; |
| 92 | |
| 93 | /* Escape unprintable characters, just in case, but don't grow the string beyond the underlying size */ |
| 94 | cellescape(escaped, TASK_COMM_LEN16, comm); |
| 95 | |
| 96 | *ret = TAKE_PTR(escaped)({ typeof(escaped) _ptr_ = (escaped); (escaped) = ((void*)0); _ptr_; }); |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | int get_process_cmdline(pid_t pid, size_t max_length, bool_Bool comm_fallback, char **line) { |
| 101 | _cleanup_fclose___attribute__((cleanup(fclosep))) FILE *f = NULL((void*)0); |
| 102 | bool_Bool space = false0; |
| 103 | char *k; |
| 104 | _cleanup_free___attribute__((cleanup(freep))) char *ans = NULL((void*)0); |
| 105 | const char *p; |
| 106 | int c; |
| 107 | |
| 108 | assert(line)do { if ((__builtin_expect(!!(!(line)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("line"), "../src/basic/process-util.c", 108 , __PRETTY_FUNCTION__); } while (0); |
| 109 | assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/process-util.c" , 109, __PRETTY_FUNCTION__); } while (0); |
| 110 | |
| 111 | /* Retrieves a process' command line. Replaces unprintable characters while doing so by whitespace (coalescing |
| 112 | * multiple sequential ones into one). If max_length is != 0 will return a string of the specified size at most |
| 113 | * (the trailing NUL byte does count towards the length here!), abbreviated with a "..." ellipsis. If |
| 114 | * comm_fallback is true and the process has no command line set (the case for kernel threads), or has a |
| 115 | * command line that resolves to the empty string will return the "comm" name of the process instead. |
| 116 | * |
| 117 | * Returns -ESRCH if the process doesn't exist, and -ENOENT if the process has no command line (and |
| 118 | * comm_fallback is false). Returns 0 and sets *line otherwise. */ |
| 119 | |
| 120 | p = procfs_file_alloca(pid, "cmdline")({ pid_t _pid_ = (pid); const char *_r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "cmdline"); } else { _r_ = __builtin_alloca ((sizeof("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof(pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof (pid_t) <= 8 ? 20 : sizeof(int[-2*(sizeof(pid_t) > 8)]) )) + 1 + sizeof("cmdline")); sprintf((char*) _r_, "/proc/""%" "i""/" "cmdline", _pid_); } _r_; }); |
| 121 | |
| 122 | f = fopen(p, "re"); |
| 123 | if (!f) { |
| 124 | if (errno(*__errno_location ()) == ENOENT2) |
| 125 | return -ESRCH3; |
| 126 | return -errno(*__errno_location ()); |
| 127 | } |
| 128 | |
| 129 | (void) __fsetlocking(f, FSETLOCKING_BYCALLERFSETLOCKING_BYCALLER); |
| 130 | |
| 131 | if (max_length == 0) { |
| 132 | /* This is supposed to be a safety guard against runaway command lines. */ |
| 133 | long l = sysconf(_SC_ARG_MAX_SC_ARG_MAX); |
| 134 | assert(l > 0)do { if ((__builtin_expect(!!(!(l > 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("l > 0"), "../src/basic/process-util.c" , 134, __PRETTY_FUNCTION__); } while (0); |
| 135 | max_length = l; |
| 136 | } |
| 137 | |
| 138 | if (max_length == 1) { |
| 139 | |
| 140 | /* If there's only room for one byte, return the empty string */ |
| 141 | ans = new0(char, 1)((char*) calloc((1), sizeof(char))); |
| 142 | if (!ans) |
| 143 | return -ENOMEM12; |
| 144 | |
| 145 | *line = TAKE_PTR(ans)({ typeof(ans) _ptr_ = (ans); (ans) = ((void*)0); _ptr_; }); |
| 146 | return 0; |
| 147 | |
| 148 | } else { |
| 149 | bool_Bool dotdotdot = false0; |
| 150 | size_t left; |
| 151 | |
| 152 | ans = new(char, max_length)((char*) malloc_multiply(sizeof(char), (max_length))); |
| 153 | if (!ans) |
| 154 | return -ENOMEM12; |
| 155 | |
| 156 | k = ans; |
| 157 | left = max_length; |
| 158 | while ((c = getc(f)) != EOF(-1)) { |
| 159 | |
| 160 | if (isprint(c)((*__ctype_b_loc ())[(int) ((c))] & (unsigned short int) _ISprint )) { |
| 161 | |
| 162 | if (space) { |
| 163 | if (left <= 2) { |
| 164 | dotdotdot = true1; |
| 165 | break; |
| 166 | } |
| 167 | |
| 168 | *(k++) = ' '; |
| 169 | left--; |
| 170 | space = false0; |
| 171 | } |
| 172 | |
| 173 | if (left <= 1) { |
| 174 | dotdotdot = true1; |
| 175 | break; |
| 176 | } |
| 177 | |
| 178 | *(k++) = (char) c; |
| 179 | left--; |
| 180 | } else if (k > ans) |
| 181 | space = true1; |
| 182 | } |
| 183 | |
| 184 | if (dotdotdot) { |
| 185 | if (max_length <= 4) { |
| 186 | k = ans; |
| 187 | left = max_length; |
| 188 | } else { |
| 189 | k = ans + max_length - 4; |
| 190 | left = 4; |
| 191 | |
| 192 | /* Eat up final spaces */ |
| 193 | while (k > ans && isspace(k[-1])((*__ctype_b_loc ())[(int) ((k[-1]))] & (unsigned short int ) _ISspace)) { |
| 194 | k--; |
| 195 | left++; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | strncpy(k, "...", left-1); |
| 200 | k[left-1] = 0; |
| 201 | } else |
| 202 | *k = 0; |
| 203 | } |
| 204 | |
| 205 | /* Kernel threads have no argv[] */ |
| 206 | if (isempty(ans)) { |
| 207 | _cleanup_free___attribute__((cleanup(freep))) char *t = NULL((void*)0); |
| 208 | int h; |
| 209 | |
| 210 | ans = mfree(ans); |
Value stored to 'ans' is never read | |
| 211 | |
| 212 | if (!comm_fallback) |
| 213 | return -ENOENT2; |
| 214 | |
| 215 | h = get_process_comm(pid, &t); |
| 216 | if (h < 0) |
| 217 | return h; |
| 218 | |
| 219 | size_t l = strlen(t); |
| 220 | |
| 221 | if (l + 3 <= max_length) { |
| 222 | ans = strjoin("[", t, "]")strjoin_real(("["), t, "]", ((void*)0)); |
| 223 | if (!ans) |
| 224 | return -ENOMEM12; |
| 225 | |
| 226 | } else if (max_length <= 6) { |
| 227 | ans = new(char, max_length)((char*) malloc_multiply(sizeof(char), (max_length))); |
| 228 | if (!ans) |
| 229 | return -ENOMEM12; |
| 230 | |
| 231 | memcpy(ans, "[...]", max_length-1); |
| 232 | ans[max_length-1] = 0; |
| 233 | } else { |
| 234 | t[max_length - 6] = 0; |
| 235 | |
| 236 | /* Chop off final spaces */ |
| 237 | delete_trailing_chars(t, WHITESPACE" \t\n\r"); |
| 238 | |
| 239 | ans = strjoin("[", t, "...]")strjoin_real(("["), t, "...]", ((void*)0)); |
| 240 | if (!ans) |
| 241 | return -ENOMEM12; |
| 242 | } |
| 243 | |
| 244 | *line = TAKE_PTR(ans)({ typeof(ans) _ptr_ = (ans); (ans) = ((void*)0); _ptr_; }); |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | k = realloc(ans, strlen(ans) + 1); |
| 249 | if (!k) |
| 250 | return -ENOMEM12; |
| 251 | |
| 252 | ans = NULL((void*)0); |
| 253 | *line = k; |
| 254 | |
| 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | int rename_process(const char name[]) { |
| 259 | static size_t mm_size = 0; |
| 260 | static char *mm = NULL((void*)0); |
| 261 | bool_Bool truncated = false0; |
| 262 | size_t l; |
| 263 | |
| 264 | /* This is a like a poor man's setproctitle(). It changes the comm field, argv[0], and also the glibc's |
| 265 | * internally used name of the process. For the first one a limit of 16 chars applies; to the second one in |
| 266 | * many cases one of 10 (i.e. length of "/sbin/init") — however if we have CAP_SYS_RESOURCES it is unbounded; |
| 267 | * to the third one 7 (i.e. the length of "systemd". If you pass a longer string it will likely be |
| 268 | * truncated. |
| 269 | * |
| 270 | * Returns 0 if a name was set but truncated, > 0 if it was set but not truncated. */ |
| 271 | |
| 272 | if (isempty(name)) |
| 273 | return -EINVAL22; /* let's not confuse users unnecessarily with an empty name */ |
| 274 | |
| 275 | if (!is_main_thread()) |
| 276 | return -EPERM1; /* Let's not allow setting the process name from other threads than the main one, as we |
| 277 | * cache things without locking, and we make assumptions that PR_SET_NAME sets the |
| 278 | * process name that isn't correct on any other threads */ |
| 279 | |
| 280 | l = strlen(name); |
| 281 | |
| 282 | /* First step, change the comm field. The main thread's comm is identical to the process comm. This means we |
| 283 | * can use PR_SET_NAME, which sets the thread name for the calling thread. */ |
| 284 | if (prctl(PR_SET_NAME15, name) < 0) |
| 285 | log_debug_errno(errno, "PR_SET_NAME failed: %m")({ int _level = ((7)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 285, __func__ , "PR_SET_NAME failed: %m") : -abs(_e); }); |
| 286 | if (l >= TASK_COMM_LEN16) /* Linux process names can be 15 chars at max */ |
| 287 | truncated = true1; |
| 288 | |
| 289 | /* Second step, change glibc's ID of the process name. */ |
| 290 | if (program_invocation_name) { |
| 291 | size_t k; |
| 292 | |
| 293 | k = strlen(program_invocation_name); |
| 294 | strncpy(program_invocation_name, name, k); |
| 295 | if (l > k) |
| 296 | truncated = true1; |
| 297 | } |
| 298 | |
| 299 | /* Third step, completely replace the argv[] array the kernel maintains for us. This requires privileges, but |
| 300 | * has the advantage that the argv[] array is exactly what we want it to be, and not filled up with zeros at |
| 301 | * the end. This is the best option for changing /proc/self/cmdline. */ |
| 302 | |
| 303 | /* Let's not bother with this if we don't have euid == 0. Strictly speaking we should check for the |
| 304 | * CAP_SYS_RESOURCE capability which is independent of the euid. In our own code the capability generally is |
| 305 | * present only for euid == 0, hence let's use this as quick bypass check, to avoid calling mmap() if |
| 306 | * PR_SET_MM_ARG_{START,END} fails with EPERM later on anyway. After all geteuid() is dead cheap to call, but |
| 307 | * mmap() is not. */ |
| 308 | if (geteuid() != 0) |
| 309 | log_debug("Skipping PR_SET_MM, as we don't have privileges.")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 309, __func__, "Skipping PR_SET_MM, as we don't have privileges." ) : -abs(_e); }); |
| 310 | else if (mm_size < l+1) { |
| 311 | size_t nn_size; |
| 312 | char *nn; |
| 313 | |
| 314 | nn_size = PAGE_ALIGN(l+1)ALIGN_TO((l+1), page_size()); |
| 315 | nn = mmap(NULL((void*)0), nn_size, PROT_READ0x1|PROT_WRITE0x2, MAP_PRIVATE0x02|MAP_ANONYMOUS0x20, -1, 0); |
| 316 | if (nn == MAP_FAILED((void *) -1)) { |
| 317 | log_debug_errno(errno, "mmap() failed: %m")({ int _level = ((7)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 317, __func__ , "mmap() failed: %m") : -abs(_e); }); |
| 318 | goto use_saved_argv; |
| 319 | } |
| 320 | |
| 321 | strncpy(nn, name, nn_size); |
| 322 | |
| 323 | /* Now, let's tell the kernel about this new memory */ |
| 324 | if (prctl(PR_SET_MM35, PR_SET_MM_ARG_START8, (unsigned long) nn, 0, 0) < 0) { |
| 325 | log_debug_errno(errno, "PR_SET_MM_ARG_START failed, proceeding without: %m")({ int _level = ((7)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 325, __func__ , "PR_SET_MM_ARG_START failed, proceeding without: %m") : -abs (_e); }); |
| 326 | (void) munmap(nn, nn_size); |
| 327 | goto use_saved_argv; |
| 328 | } |
| 329 | |
| 330 | /* And update the end pointer to the new end, too. If this fails, we don't really know what to do, it's |
| 331 | * pretty unlikely that we can rollback, hence we'll just accept the failure, and continue. */ |
| 332 | if (prctl(PR_SET_MM35, PR_SET_MM_ARG_END9, (unsigned long) nn + l + 1, 0, 0) < 0) |
| 333 | log_debug_errno(errno, "PR_SET_MM_ARG_END failed, proceeding without: %m")({ int _level = ((7)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 333, __func__ , "PR_SET_MM_ARG_END failed, proceeding without: %m") : -abs( _e); }); |
| 334 | |
| 335 | if (mm) |
| 336 | (void) munmap(mm, mm_size); |
| 337 | |
| 338 | mm = nn; |
| 339 | mm_size = nn_size; |
| 340 | } else { |
| 341 | strncpy(mm, name, mm_size); |
| 342 | |
| 343 | /* Update the end pointer, continuing regardless of any failure. */ |
| 344 | if (prctl(PR_SET_MM35, PR_SET_MM_ARG_END9, (unsigned long) mm + l + 1, 0, 0) < 0) |
| 345 | log_debug_errno(errno, "PR_SET_MM_ARG_END failed, proceeding without: %m")({ int _level = ((7)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 345, __func__ , "PR_SET_MM_ARG_END failed, proceeding without: %m") : -abs( _e); }); |
| 346 | } |
| 347 | |
| 348 | use_saved_argv: |
| 349 | /* Fourth step: in all cases we'll also update the original argv[], so that our own code gets it right too if |
| 350 | * it still looks here */ |
| 351 | |
| 352 | if (saved_argc > 0) { |
| 353 | int i; |
| 354 | |
| 355 | if (saved_argv[0]) { |
| 356 | size_t k; |
| 357 | |
| 358 | k = strlen(saved_argv[0]); |
| 359 | strncpy(saved_argv[0], name, k); |
| 360 | if (l > k) |
| 361 | truncated = true1; |
| 362 | } |
| 363 | |
| 364 | for (i = 1; i < saved_argc; i++) { |
| 365 | if (!saved_argv[i]) |
| 366 | break; |
| 367 | |
| 368 | memzero(saved_argv[i], strlen(saved_argv[i]))({ size_t _l_ = (strlen(saved_argv[i])); void *_x_ = (saved_argv [i]); _l_ == 0 ? _x_ : memset(_x_, 0, _l_); }); |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | return !truncated; |
| 373 | } |
| 374 | |
| 375 | int is_kernel_thread(pid_t pid) { |
| 376 | _cleanup_free___attribute__((cleanup(freep))) char *line = NULL((void*)0); |
| 377 | unsigned long long flags; |
| 378 | size_t l, i; |
| 379 | const char *p; |
| 380 | char *q; |
| 381 | int r; |
| 382 | |
| 383 | if (IN_SET(pid, 0, 1)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended [20 - sizeof((int[]){0, 1})/sizeof(int)]; switch(pid) { case 0 : case 1: _found = 1; break; default: break; } _found; }) || pid == getpid_cached()) /* pid 1, and we ourselves certainly aren't a kernel thread */ |
| 384 | return 0; |
| 385 | if (!pid_is_valid(pid)) |
| 386 | return -EINVAL22; |
| 387 | |
| 388 | p = procfs_file_alloca(pid, "stat")({ pid_t _pid_ = (pid); const char *_r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "stat"); } else { _r_ = __builtin_alloca (( sizeof("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof (pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof(pid_t ) <= 8 ? 20 : sizeof(int[-2*(sizeof(pid_t) > 8)]))) + 1 + sizeof("stat")); sprintf((char*) _r_, "/proc/""%" "i""/" "stat" , _pid_); } _r_; }); |
| 389 | r = read_one_line_file(p, &line); |
| 390 | if (r == -ENOENT2) |
| 391 | return -ESRCH3; |
| 392 | if (r < 0) |
| 393 | return r; |
| 394 | |
| 395 | /* Skip past the comm field */ |
| 396 | q = strrchr(line, ')'); |
| 397 | if (!q) |
| 398 | return -EINVAL22; |
| 399 | q++; |
| 400 | |
| 401 | /* Skip 6 fields to reach the flags field */ |
| 402 | for (i = 0; i < 6; i++) { |
| 403 | l = strspn(q, WHITESPACE" \t\n\r"); |
| 404 | if (l < 1) |
| 405 | return -EINVAL22; |
| 406 | q += l; |
| 407 | |
| 408 | l = strcspn(q, WHITESPACE" \t\n\r"); |
| 409 | if (l < 1) |
| 410 | return -EINVAL22; |
| 411 | q += l; |
| 412 | } |
| 413 | |
| 414 | /* Skip preceeding whitespace */ |
| 415 | l = strspn(q, WHITESPACE" \t\n\r"); |
| 416 | if (l < 1) |
| 417 | return -EINVAL22; |
| 418 | q += l; |
| 419 | |
| 420 | /* Truncate the rest */ |
| 421 | l = strcspn(q, WHITESPACE" \t\n\r"); |
| 422 | if (l < 1) |
| 423 | return -EINVAL22; |
| 424 | q[l] = 0; |
| 425 | |
| 426 | r = safe_atollu(q, &flags); |
| 427 | if (r < 0) |
| 428 | return r; |
| 429 | |
| 430 | return !!(flags & PF_KTHREAD0x00200000); |
| 431 | } |
| 432 | |
| 433 | int get_process_capeff(pid_t pid, char **capeff) { |
| 434 | const char *p; |
| 435 | int r; |
| 436 | |
| 437 | assert(capeff)do { if ((__builtin_expect(!!(!(capeff)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("capeff"), "../src/basic/process-util.c" , 437, __PRETTY_FUNCTION__); } while (0); |
| 438 | assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/process-util.c" , 438, __PRETTY_FUNCTION__); } while (0); |
| 439 | |
| 440 | p = procfs_file_alloca(pid, "status")({ pid_t _pid_ = (pid); const char *_r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "status"); } else { _r_ = __builtin_alloca ( (sizeof("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof (pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof(pid_t ) <= 8 ? 20 : sizeof(int[-2*(sizeof(pid_t) > 8)]))) + 1 + sizeof("status")); sprintf((char*) _r_, "/proc/""%" "i""/" "status", _pid_); } _r_; }); |
| 441 | |
| 442 | r = get_proc_field(p, "CapEff", WHITESPACE" \t\n\r", capeff); |
| 443 | if (r == -ENOENT2) |
| 444 | return -ESRCH3; |
| 445 | |
| 446 | return r; |
| 447 | } |
| 448 | |
| 449 | static int get_process_link_contents(const char *proc_file, char **name) { |
| 450 | int r; |
| 451 | |
| 452 | assert(proc_file)do { if ((__builtin_expect(!!(!(proc_file)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("proc_file"), "../src/basic/process-util.c" , 452, __PRETTY_FUNCTION__); } while (0); |
| 453 | assert(name)do { if ((__builtin_expect(!!(!(name)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("name"), "../src/basic/process-util.c", 453 , __PRETTY_FUNCTION__); } while (0); |
| 454 | |
| 455 | r = readlink_malloc(proc_file, name); |
| 456 | if (r == -ENOENT2) |
| 457 | return -ESRCH3; |
| 458 | if (r < 0) |
| 459 | return r; |
| 460 | |
| 461 | return 0; |
| 462 | } |
| 463 | |
| 464 | int get_process_exe(pid_t pid, char **name) { |
| 465 | const char *p; |
| 466 | char *d; |
| 467 | int r; |
| 468 | |
| 469 | assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/process-util.c" , 469, __PRETTY_FUNCTION__); } while (0); |
| 470 | |
| 471 | p = procfs_file_alloca(pid, "exe")({ pid_t _pid_ = (pid); const char *_r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "exe"); } else { _r_ = __builtin_alloca ((sizeof ("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof( pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof(pid_t ) <= 8 ? 20 : sizeof(int[-2*(sizeof(pid_t) > 8)]))) + 1 + sizeof("exe")); sprintf((char*) _r_, "/proc/""%" "i""/" "exe" , _pid_); } _r_; }); |
| 472 | r = get_process_link_contents(p, name); |
| 473 | if (r < 0) |
| 474 | return r; |
| 475 | |
| 476 | d = endswith(*name, " (deleted)"); |
| 477 | if (d) |
| 478 | *d = '\0'; |
| 479 | |
| 480 | return 0; |
| 481 | } |
| 482 | |
| 483 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
| 484 | _cleanup_fclose___attribute__((cleanup(fclosep))) FILE *f = NULL((void*)0); |
| 485 | char line[LINE_MAX2048]; |
| 486 | const char *p; |
| 487 | |
| 488 | assert(field)do { if ((__builtin_expect(!!(!(field)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("field"), "../src/basic/process-util.c", 488, __PRETTY_FUNCTION__); } while (0); |
| 489 | assert(uid)do { if ((__builtin_expect(!!(!(uid)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("uid"), "../src/basic/process-util.c", 489 , __PRETTY_FUNCTION__); } while (0); |
| 490 | |
| 491 | if (pid < 0) |
| 492 | return -EINVAL22; |
| 493 | |
| 494 | p = procfs_file_alloca(pid, "status")({ pid_t _pid_ = (pid); const char *_r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "status"); } else { _r_ = __builtin_alloca ( (sizeof("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof (pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof(pid_t ) <= 8 ? 20 : sizeof(int[-2*(sizeof(pid_t) > 8)]))) + 1 + sizeof("status")); sprintf((char*) _r_, "/proc/""%" "i""/" "status", _pid_); } _r_; }); |
| 495 | f = fopen(p, "re"); |
| 496 | if (!f) { |
| 497 | if (errno(*__errno_location ()) == ENOENT2) |
| 498 | return -ESRCH3; |
| 499 | return -errno(*__errno_location ()); |
| 500 | } |
| 501 | |
| 502 | (void) __fsetlocking(f, FSETLOCKING_BYCALLERFSETLOCKING_BYCALLER); |
| 503 | |
| 504 | FOREACH_LINE(line, f, return -errno)for (;;) if (!fgets(line, sizeof(line), f)) { if (ferror(f)) { return -(*__errno_location ()); } break; } else { |
| 505 | char *l; |
| 506 | |
| 507 | l = strstrip(line); |
| 508 | |
| 509 | if (startswith(l, field)) { |
| 510 | l += strlen(field); |
| 511 | l += strspn(l, WHITESPACE" \t\n\r"); |
| 512 | |
| 513 | l[strcspn(l, WHITESPACE" \t\n\r")] = 0; |
| 514 | |
| 515 | return parse_uid(l, uid); |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | return -EIO5; |
| 520 | } |
| 521 | |
| 522 | int get_process_uid(pid_t pid, uid_t *uid) { |
| 523 | |
| 524 | if (pid == 0 || pid == getpid_cached()) { |
| 525 | *uid = getuid(); |
| 526 | return 0; |
| 527 | } |
| 528 | |
| 529 | return get_process_id(pid, "Uid:", uid); |
| 530 | } |
| 531 | |
| 532 | int get_process_gid(pid_t pid, gid_t *gid) { |
| 533 | |
| 534 | if (pid == 0 || pid == getpid_cached()) { |
| 535 | *gid = getgid(); |
| 536 | return 0; |
| 537 | } |
| 538 | |
| 539 | assert_cc(sizeof(uid_t) == sizeof(gid_t))GCC diagnostic push
; GCC diagnostic ignored "-Wdeclaration-after-statement" ; struct _assert_struct_11 { char x[(sizeof(uid_t) == sizeof (gid_t)) ? 0 : -1]; }; GCC diagnostic pop ; |
| 540 | return get_process_id(pid, "Gid:", gid); |
| 541 | } |
| 542 | |
| 543 | int get_process_cwd(pid_t pid, char **cwd) { |
| 544 | const char *p; |
| 545 | |
| 546 | assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/process-util.c" , 546, __PRETTY_FUNCTION__); } while (0); |
| 547 | |
| 548 | p = procfs_file_alloca(pid, "cwd")({ pid_t _pid_ = (pid); const char *_r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "cwd"); } else { _r_ = __builtin_alloca ((sizeof ("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof( pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof(pid_t ) <= 8 ? 20 : sizeof(int[-2*(sizeof(pid_t) > 8)]))) + 1 + sizeof("cwd")); sprintf((char*) _r_, "/proc/""%" "i""/" "cwd" , _pid_); } _r_; }); |
| 549 | |
| 550 | return get_process_link_contents(p, cwd); |
| 551 | } |
| 552 | |
| 553 | int get_process_root(pid_t pid, char **root) { |
| 554 | const char *p; |
| 555 | |
| 556 | assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/process-util.c" , 556, __PRETTY_FUNCTION__); } while (0); |
| 557 | |
| 558 | p = procfs_file_alloca(pid, "root")({ pid_t _pid_ = (pid); const char *_r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "root"); } else { _r_ = __builtin_alloca (( sizeof("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof (pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof(pid_t ) <= 8 ? 20 : sizeof(int[-2*(sizeof(pid_t) > 8)]))) + 1 + sizeof("root")); sprintf((char*) _r_, "/proc/""%" "i""/" "root" , _pid_); } _r_; }); |
| 559 | |
| 560 | return get_process_link_contents(p, root); |
| 561 | } |
| 562 | |
| 563 | int get_process_environ(pid_t pid, char **env) { |
| 564 | _cleanup_fclose___attribute__((cleanup(fclosep))) FILE *f = NULL((void*)0); |
| 565 | _cleanup_free___attribute__((cleanup(freep))) char *outcome = NULL((void*)0); |
| 566 | int c; |
| 567 | const char *p; |
| 568 | size_t allocated = 0, sz = 0; |
| 569 | |
| 570 | assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/process-util.c" , 570, __PRETTY_FUNCTION__); } while (0); |
| 571 | assert(env)do { if ((__builtin_expect(!!(!(env)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("env"), "../src/basic/process-util.c", 571 , __PRETTY_FUNCTION__); } while (0); |
| 572 | |
| 573 | p = procfs_file_alloca(pid, "environ")({ pid_t _pid_ = (pid); const char *_r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "environ"); } else { _r_ = __builtin_alloca ((sizeof("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof(pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof (pid_t) <= 8 ? 20 : sizeof(int[-2*(sizeof(pid_t) > 8)]) )) + 1 + sizeof("environ")); sprintf((char*) _r_, "/proc/""%" "i""/" "environ", _pid_); } _r_; }); |
| 574 | |
| 575 | f = fopen(p, "re"); |
| 576 | if (!f) { |
| 577 | if (errno(*__errno_location ()) == ENOENT2) |
| 578 | return -ESRCH3; |
| 579 | return -errno(*__errno_location ()); |
| 580 | } |
| 581 | |
| 582 | (void) __fsetlocking(f, FSETLOCKING_BYCALLERFSETLOCKING_BYCALLER); |
| 583 | |
| 584 | while ((c = fgetc(f)) != EOF(-1)) { |
| 585 | if (!GREEDY_REALLOC(outcome, allocated, sz + 5)greedy_realloc((void**) &(outcome), &(allocated), (sz + 5), sizeof((outcome)[0]))) |
| 586 | return -ENOMEM12; |
| 587 | |
| 588 | if (c == '\0') |
| 589 | outcome[sz++] = '\n'; |
| 590 | else |
| 591 | sz += cescape_char(c, outcome + sz); |
| 592 | } |
| 593 | |
| 594 | if (!outcome) { |
| 595 | outcome = strdup(""); |
| 596 | if (!outcome) |
| 597 | return -ENOMEM12; |
| 598 | } else |
| 599 | outcome[sz] = '\0'; |
| 600 | |
| 601 | *env = TAKE_PTR(outcome)({ typeof(outcome) _ptr_ = (outcome); (outcome) = ((void*)0); _ptr_; }); |
| 602 | |
| 603 | return 0; |
| 604 | } |
| 605 | |
| 606 | int get_process_ppid(pid_t pid, pid_t *_ppid) { |
| 607 | int r; |
| 608 | _cleanup_free___attribute__((cleanup(freep))) char *line = NULL((void*)0); |
| 609 | long unsigned ppid; |
| 610 | const char *p; |
| 611 | |
| 612 | assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/process-util.c" , 612, __PRETTY_FUNCTION__); } while (0); |
| 613 | assert(_ppid)do { if ((__builtin_expect(!!(!(_ppid)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("_ppid"), "../src/basic/process-util.c", 613, __PRETTY_FUNCTION__); } while (0); |
| 614 | |
| 615 | if (pid == 0 || pid == getpid_cached()) { |
| 616 | *_ppid = getppid(); |
| 617 | return 0; |
| 618 | } |
| 619 | |
| 620 | p = procfs_file_alloca(pid, "stat")({ pid_t _pid_ = (pid); const char *_r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "stat"); } else { _r_ = __builtin_alloca (( sizeof("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof (pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof(pid_t ) <= 8 ? 20 : sizeof(int[-2*(sizeof(pid_t) > 8)]))) + 1 + sizeof("stat")); sprintf((char*) _r_, "/proc/""%" "i""/" "stat" , _pid_); } _r_; }); |
| 621 | r = read_one_line_file(p, &line); |
| 622 | if (r == -ENOENT2) |
| 623 | return -ESRCH3; |
| 624 | if (r < 0) |
| 625 | return r; |
| 626 | |
| 627 | /* Let's skip the pid and comm fields. The latter is enclosed |
| 628 | * in () but does not escape any () in its value, so let's |
| 629 | * skip over it manually */ |
| 630 | |
| 631 | p = strrchr(line, ')'); |
| 632 | if (!p) |
| 633 | return -EIO5; |
| 634 | |
| 635 | p++; |
| 636 | |
| 637 | if (sscanf(p, " " |
| 638 | "%*c " /* state */ |
| 639 | "%lu ", /* ppid */ |
| 640 | &ppid) != 1) |
| 641 | return -EIO5; |
| 642 | |
| 643 | if ((long unsigned) (pid_t) ppid != ppid) |
| 644 | return -ERANGE34; |
| 645 | |
| 646 | *_ppid = (pid_t) ppid; |
| 647 | |
| 648 | return 0; |
| 649 | } |
| 650 | |
| 651 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
| 652 | siginfo_t dummy; |
| 653 | |
| 654 | assert(pid >= 1)do { if ((__builtin_expect(!!(!(pid >= 1)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 1"), "../src/basic/process-util.c" , 654, __PRETTY_FUNCTION__); } while (0); |
| 655 | |
| 656 | if (!status) |
| 657 | status = &dummy; |
| 658 | |
| 659 | for (;;) { |
| 660 | zero(*status)(({ size_t _l_ = (sizeof(*status)); void *_x_ = (&(*status )); _l_ == 0 ? _x_ : memset(_x_, 0, _l_); })); |
| 661 | |
| 662 | if (waitid(P_PID, pid, status, WEXITED4) < 0) { |
| 663 | |
| 664 | if (errno(*__errno_location ()) == EINTR4) |
| 665 | continue; |
| 666 | |
| 667 | return negative_errno(); |
| 668 | } |
| 669 | |
| 670 | return 0; |
| 671 | } |
| 672 | } |
| 673 | |
| 674 | /* |
| 675 | * Return values: |
| 676 | * < 0 : wait_for_terminate() failed to get the state of the |
| 677 | * process, the process was terminated by a signal, or |
| 678 | * failed for an unknown reason. |
| 679 | * >=0 : The process terminated normally, and its exit code is |
| 680 | * returned. |
| 681 | * |
| 682 | * That is, success is indicated by a return value of zero, and an |
| 683 | * error is indicated by a non-zero value. |
| 684 | * |
| 685 | * A warning is emitted if the process terminates abnormally, |
| 686 | * and also if it returns non-zero unless check_exit_code is true. |
| 687 | */ |
| 688 | int wait_for_terminate_and_check(const char *name, pid_t pid, WaitFlags flags) { |
| 689 | _cleanup_free___attribute__((cleanup(freep))) char *buffer = NULL((void*)0); |
| 690 | siginfo_t status; |
| 691 | int r, prio; |
| 692 | |
| 693 | assert(pid > 1)do { if ((__builtin_expect(!!(!(pid > 1)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid > 1"), "../src/basic/process-util.c" , 693, __PRETTY_FUNCTION__); } while (0); |
| 694 | |
| 695 | if (!name) { |
| 696 | r = get_process_comm(pid, &buffer); |
| 697 | if (r < 0) |
| 698 | log_debug_errno(r, "Failed to acquire process name of " PID_FMT ", ignoring: %m", pid)({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 698, __func__, "Failed to acquire process name of " "%" "i" ", ignoring: %m", pid) : -abs(_e); }); |
| 699 | else |
| 700 | name = buffer; |
| 701 | } |
| 702 | |
| 703 | prio = flags & WAIT_LOG_ABNORMAL ? LOG_ERR3 : LOG_DEBUG7; |
| 704 | |
| 705 | r = wait_for_terminate(pid, &status); |
| 706 | if (r < 0) |
| 707 | return log_full_errno(prio, r, "Failed to wait for %s: %m", strna(name))({ int _level = ((prio)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 707, __func__, "Failed to wait for %s: %m" , strna(name)) : -abs(_e); }); |
| 708 | |
| 709 | if (status.si_code == CLD_EXITEDCLD_EXITED) { |
| 710 | if (status.si_status_sifields._sigchld.si_status != EXIT_SUCCESS0) |
| 711 | log_full(flags & WAIT_LOG_NON_ZERO_EXIT_STATUS ? LOG_ERR : LOG_DEBUG,({ int _level = (((flags & WAIT_LOG_NON_ZERO_EXIT_STATUS ? 3 : 7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm (_realm) >= ((_level) & 0x07)) ? log_internal_realm((( _realm) << 10 | (_level)), _e, "../src/basic/process-util.c" , 712, __func__, "%s failed with exit status %i.", strna(name ), status._sifields._sigchld.si_status) : -abs(_e); }) |
| 712 | "%s failed with exit status %i.", strna(name), status.si_status)({ int _level = (((flags & WAIT_LOG_NON_ZERO_EXIT_STATUS ? 3 : 7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm (_realm) >= ((_level) & 0x07)) ? log_internal_realm((( _realm) << 10 | (_level)), _e, "../src/basic/process-util.c" , 712, __func__, "%s failed with exit status %i.", strna(name ), status._sifields._sigchld.si_status) : -abs(_e); }); |
| 713 | else |
| 714 | log_debug("%s succeeded.", name)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 714, __func__, "%s succeeded." , name) : -abs(_e); }); |
| 715 | |
| 716 | return status.si_status_sifields._sigchld.si_status; |
| 717 | |
| 718 | } else if (IN_SET(status.si_code, CLD_KILLED, CLD_DUMPED)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended [20 - sizeof((int[]){CLD_KILLED, CLD_DUMPED})/sizeof(int)]; switch (status.si_code) { case CLD_KILLED: case CLD_DUMPED: _found = 1; break; default: break; } _found; })) { |
| 719 | |
| 720 | log_full(prio, "%s terminated by signal %s.", strna(name), signal_to_string(status.si_status))({ int _level = (((prio))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 720, __func__, "%s terminated by signal %s." , strna(name), signal_to_string(status._sifields._sigchld.si_status )) : -abs(_e); }); |
| 721 | return -EPROTO71; |
| 722 | } |
| 723 | |
| 724 | log_full(prio, "%s failed due to unknown reason.", strna(name))({ int _level = (((prio))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 724, __func__, "%s failed due to unknown reason." , strna(name)) : -abs(_e); }); |
| 725 | return -EPROTO71; |
| 726 | } |
| 727 | |
| 728 | /* |
| 729 | * Return values: |
| 730 | * |
| 731 | * < 0 : wait_for_terminate_with_timeout() failed to get the state of the process, the process timed out, the process |
| 732 | * was terminated by a signal, or failed for an unknown reason. |
| 733 | * |
| 734 | * >=0 : The process terminated normally with no failures. |
| 735 | * |
| 736 | * Success is indicated by a return value of zero, a timeout is indicated by ETIMEDOUT, and all other child failure |
| 737 | * states are indicated by error is indicated by a non-zero value. |
| 738 | * |
| 739 | * This call assumes SIGCHLD has been blocked already, in particular before the child to wait for has been forked off |
| 740 | * to remain entirely race-free. |
| 741 | */ |
| 742 | int wait_for_terminate_with_timeout(pid_t pid, usec_t timeout) { |
| 743 | sigset_t mask; |
| 744 | int r; |
| 745 | usec_t until; |
| 746 | |
| 747 | assert_se(sigemptyset(&mask) == 0)do { if ((__builtin_expect(!!(!(sigemptyset(&mask) == 0)) ,0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("sigemptyset(&mask) == 0" ), "../src/basic/process-util.c", 747, __PRETTY_FUNCTION__); } while (0); |
| 748 | assert_se(sigaddset(&mask, SIGCHLD) == 0)do { if ((__builtin_expect(!!(!(sigaddset(&mask, 17) == 0 )),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("sigaddset(&mask, SIGCHLD) == 0" ), "../src/basic/process-util.c", 748, __PRETTY_FUNCTION__); } while (0); |
| 749 | |
| 750 | /* Drop into a sigtimewait-based timeout. Waiting for the |
| 751 | * pid to exit. */ |
| 752 | until = now(CLOCK_MONOTONIC1) + timeout; |
| 753 | for (;;) { |
| 754 | usec_t n; |
| 755 | siginfo_t status = {}; |
| 756 | struct timespec ts; |
| 757 | |
| 758 | n = now(CLOCK_MONOTONIC1); |
| 759 | if (n >= until) |
| 760 | break; |
| 761 | |
| 762 | r = sigtimedwait(&mask, NULL((void*)0), timespec_store(&ts, until - n)) < 0 ? -errno(*__errno_location ()) : 0; |
| 763 | /* Assuming we woke due to the child exiting. */ |
| 764 | if (waitid(P_PID, pid, &status, WEXITED4|WNOHANG1) == 0) { |
| 765 | if (status.si_pid_sifields._kill.si_pid == pid) { |
| 766 | /* This is the correct child.*/ |
| 767 | if (status.si_code == CLD_EXITEDCLD_EXITED) |
| 768 | return (status.si_status_sifields._sigchld.si_status == 0) ? 0 : -EPROTO71; |
| 769 | else |
| 770 | return -EPROTO71; |
| 771 | } |
| 772 | } |
| 773 | /* Not the child, check for errors and proceed appropriately */ |
| 774 | if (r < 0) { |
| 775 | switch (r) { |
| 776 | case -EAGAIN11: |
| 777 | /* Timed out, child is likely hung. */ |
| 778 | return -ETIMEDOUT110; |
| 779 | case -EINTR4: |
| 780 | /* Received a different signal and should retry */ |
| 781 | continue; |
| 782 | default: |
| 783 | /* Return any unexpected errors */ |
| 784 | return r; |
| 785 | } |
| 786 | } |
| 787 | } |
| 788 | |
| 789 | return -EPROTO71; |
| 790 | } |
| 791 | |
| 792 | void sigkill_wait(pid_t pid) { |
| 793 | assert(pid > 1)do { if ((__builtin_expect(!!(!(pid > 1)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid > 1"), "../src/basic/process-util.c" , 793, __PRETTY_FUNCTION__); } while (0); |
| 794 | |
| 795 | if (kill(pid, SIGKILL9) > 0) |
| 796 | (void) wait_for_terminate(pid, NULL((void*)0)); |
| 797 | } |
| 798 | |
| 799 | void sigkill_waitp(pid_t *pid) { |
| 800 | PROTECT_ERRNO__attribute__((cleanup(_reset_errno_))) __attribute__((unused )) int _saved_errno_ = (*__errno_location ()); |
| 801 | |
| 802 | if (!pid) |
| 803 | return; |
| 804 | if (*pid <= 1) |
| 805 | return; |
| 806 | |
| 807 | sigkill_wait(*pid); |
| 808 | } |
| 809 | |
| 810 | void sigterm_wait(pid_t pid) { |
| 811 | assert(pid > 1)do { if ((__builtin_expect(!!(!(pid > 1)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid > 1"), "../src/basic/process-util.c" , 811, __PRETTY_FUNCTION__); } while (0); |
| 812 | |
| 813 | if (kill_and_sigcont(pid, SIGTERM15) > 0) |
| 814 | (void) wait_for_terminate(pid, NULL((void*)0)); |
| 815 | } |
| 816 | |
| 817 | int kill_and_sigcont(pid_t pid, int sig) { |
| 818 | int r; |
| 819 | |
| 820 | r = kill(pid, sig) < 0 ? -errno(*__errno_location ()) : 0; |
| 821 | |
| 822 | /* If this worked, also send SIGCONT, unless we already just sent a SIGCONT, or SIGKILL was sent which isn't |
| 823 | * affected by a process being suspended anyway. */ |
| 824 | if (r >= 0 && !IN_SET(sig, SIGCONT, SIGKILL)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended [20 - sizeof((int[]){18, 9})/sizeof(int)]; switch(sig) { case 18: case 9: _found = 1; break; default: break; } _found; })) |
| 825 | (void) kill(pid, SIGCONT18); |
| 826 | |
| 827 | return r; |
| 828 | } |
| 829 | |
| 830 | int getenv_for_pid(pid_t pid, const char *field, char **ret) { |
| 831 | _cleanup_fclose___attribute__((cleanup(fclosep))) FILE *f = NULL((void*)0); |
| 832 | char *value = NULL((void*)0); |
| 833 | bool_Bool done = false0; |
| 834 | const char *path; |
| 835 | size_t l; |
| 836 | |
| 837 | assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/process-util.c" , 837, __PRETTY_FUNCTION__); } while (0); |
| 838 | assert(field)do { if ((__builtin_expect(!!(!(field)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("field"), "../src/basic/process-util.c", 838, __PRETTY_FUNCTION__); } while (0); |
| 839 | assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/process-util.c", 839 , __PRETTY_FUNCTION__); } while (0); |
| 840 | |
| 841 | if (pid == 0 || pid == getpid_cached()) { |
| 842 | const char *e; |
| 843 | |
| 844 | e = getenv(field); |
| 845 | if (!e) { |
| 846 | *ret = NULL((void*)0); |
| 847 | return 0; |
| 848 | } |
| 849 | |
| 850 | value = strdup(e); |
| 851 | if (!value) |
| 852 | return -ENOMEM12; |
| 853 | |
| 854 | *ret = value; |
| 855 | return 1; |
| 856 | } |
| 857 | |
| 858 | path = procfs_file_alloca(pid, "environ")({ pid_t _pid_ = (pid); const char *_r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "environ"); } else { _r_ = __builtin_alloca ((sizeof("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof(pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof (pid_t) <= 8 ? 20 : sizeof(int[-2*(sizeof(pid_t) > 8)]) )) + 1 + sizeof("environ")); sprintf((char*) _r_, "/proc/""%" "i""/" "environ", _pid_); } _r_; }); |
| 859 | |
| 860 | f = fopen(path, "re"); |
| 861 | if (!f) { |
| 862 | if (errno(*__errno_location ()) == ENOENT2) |
| 863 | return -ESRCH3; |
| 864 | |
| 865 | return -errno(*__errno_location ()); |
| 866 | } |
| 867 | |
| 868 | (void) __fsetlocking(f, FSETLOCKING_BYCALLERFSETLOCKING_BYCALLER); |
| 869 | |
| 870 | l = strlen(field); |
| 871 | |
| 872 | do { |
| 873 | char line[LINE_MAX2048]; |
| 874 | size_t i; |
| 875 | |
| 876 | for (i = 0; i < sizeof(line)-1; i++) { |
| 877 | int c; |
| 878 | |
| 879 | c = getc(f); |
| 880 | if (_unlikely_(c == EOF)(__builtin_expect(!!(c == (-1)),0))) { |
| 881 | done = true1; |
| 882 | break; |
| 883 | } else if (c == 0) |
| 884 | break; |
| 885 | |
| 886 | line[i] = c; |
| 887 | } |
| 888 | line[i] = 0; |
| 889 | |
| 890 | if (strneq(line, field, l)(strncmp((line), (field), (l)) == 0) && line[l] == '=') { |
| 891 | value = strdup(line + l + 1); |
| 892 | if (!value) |
| 893 | return -ENOMEM12; |
| 894 | |
| 895 | *ret = value; |
| 896 | return 1; |
| 897 | } |
| 898 | |
| 899 | } while (!done); |
| 900 | |
| 901 | *ret = NULL((void*)0); |
| 902 | return 0; |
| 903 | } |
| 904 | |
| 905 | int pid_is_my_child(pid_t pid) { |
| 906 | pid_t ppid; |
| 907 | int r; |
| 908 | |
| 909 | if (pid <= 1) |
| 910 | return false0; |
| 911 | |
| 912 | r = get_process_ppid(pid, &ppid); |
| 913 | if (r < 0) |
| 914 | return r; |
| 915 | |
| 916 | return ppid == getpid_cached(); |
| 917 | } |
| 918 | |
| 919 | bool_Bool pid_is_unwaited(pid_t pid) { |
| 920 | /* Checks whether a PID is still valid at all, including a zombie */ |
| 921 | |
| 922 | if (pid < 0) |
| 923 | return false0; |
| 924 | |
| 925 | if (pid <= 1) /* If we or PID 1 would be dead and have been waited for, this code would not be running */ |
| 926 | return true1; |
| 927 | |
| 928 | if (pid == getpid_cached()) |
| 929 | return true1; |
| 930 | |
| 931 | if (kill(pid, 0) >= 0) |
| 932 | return true1; |
| 933 | |
| 934 | return errno(*__errno_location ()) != ESRCH3; |
| 935 | } |
| 936 | |
| 937 | bool_Bool pid_is_alive(pid_t pid) { |
| 938 | int r; |
| 939 | |
| 940 | /* Checks whether a PID is still valid and not a zombie */ |
| 941 | |
| 942 | if (pid < 0) |
| 943 | return false0; |
| 944 | |
| 945 | if (pid <= 1) /* If we or PID 1 would be a zombie, this code would not be running */ |
| 946 | return true1; |
| 947 | |
| 948 | if (pid == getpid_cached()) |
| 949 | return true1; |
| 950 | |
| 951 | r = get_process_state(pid); |
| 952 | if (IN_SET(r, -ESRCH, 'Z')({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended [20 - sizeof((int[]){-3, 'Z'})/sizeof(int)]; switch(r) { case -3: case 'Z': _found = 1; break; default: break; } _found; } )) |
| 953 | return false0; |
| 954 | |
| 955 | return true1; |
| 956 | } |
| 957 | |
| 958 | int pid_from_same_root_fs(pid_t pid) { |
| 959 | const char *root; |
| 960 | |
| 961 | if (pid < 0) |
| 962 | return false0; |
| 963 | |
| 964 | if (pid == 0 || pid == getpid_cached()) |
| 965 | return true1; |
| 966 | |
| 967 | root = procfs_file_alloca(pid, "root")({ pid_t _pid_ = (pid); const char *_r_; if (_pid_ == 0) { _r_ = ("/proc/self/" "root"); } else { _r_ = __builtin_alloca (( sizeof("""/proc/""") - 1) + (2+(sizeof(pid_t) <= 1 ? 3 : sizeof (pid_t) <= 2 ? 5 : sizeof(pid_t) <= 4 ? 10 : sizeof(pid_t ) <= 8 ? 20 : sizeof(int[-2*(sizeof(pid_t) > 8)]))) + 1 + sizeof("root")); sprintf((char*) _r_, "/proc/""%" "i""/" "root" , _pid_); } _r_; }); |
| 968 | |
| 969 | return files_same(root, "/proc/1/root", 0); |
| 970 | } |
| 971 | |
| 972 | bool_Bool is_main_thread(void) { |
| 973 | static thread_local__thread int cached = 0; |
| 974 | |
| 975 | if (_unlikely_(cached == 0)(__builtin_expect(!!(cached == 0),0))) |
| 976 | cached = getpid_cached() == gettid() ? 1 : -1; |
| 977 | |
| 978 | return cached > 0; |
| 979 | } |
| 980 | |
| 981 | _noreturn___attribute__((noreturn)) void freeze(void) { |
| 982 | |
| 983 | log_close(); |
| 984 | |
| 985 | /* Make sure nobody waits for us on a socket anymore */ |
| 986 | close_all_fds(NULL((void*)0), 0); |
| 987 | |
| 988 | sync(); |
| 989 | |
| 990 | /* Let's not freeze right away, but keep reaping zombies. */ |
| 991 | for (;;) { |
| 992 | int r; |
| 993 | siginfo_t si = {}; |
| 994 | |
| 995 | r = waitid(P_ALL, 0, &si, WEXITED4); |
| 996 | if (r < 0 && errno(*__errno_location ()) != EINTR4) |
| 997 | break; |
| 998 | } |
| 999 | |
| 1000 | /* waitid() failed with an unexpected error, things are really borked. Freeze now! */ |
| 1001 | for (;;) |
| 1002 | pause(); |
| 1003 | } |
| 1004 | |
| 1005 | bool_Bool oom_score_adjust_is_valid(int oa) { |
| 1006 | return oa >= OOM_SCORE_ADJ_MIN(-1000) && oa <= OOM_SCORE_ADJ_MAX1000; |
| 1007 | } |
| 1008 | |
| 1009 | unsigned long personality_from_string(const char *p) { |
| 1010 | int architecture; |
| 1011 | |
| 1012 | if (!p) |
| 1013 | return PERSONALITY_INVALID0xffffffffLU; |
| 1014 | |
| 1015 | /* Parse a personality specifier. We use our own identifiers that indicate specific ABIs, rather than just |
| 1016 | * hints regarding the register size, since we want to keep things open for multiple locally supported ABIs for |
| 1017 | * the same register size. */ |
| 1018 | |
| 1019 | architecture = architecture_from_string(p); |
| 1020 | if (architecture < 0) |
| 1021 | return PERSONALITY_INVALID0xffffffffLU; |
| 1022 | |
| 1023 | if (architecture == native_architecture()ARCHITECTURE_X86_64) |
| 1024 | return PER_LINUX; |
| 1025 | #ifdef SECONDARY_ARCHITECTUREARCHITECTURE_X86 |
| 1026 | if (architecture == SECONDARY_ARCHITECTUREARCHITECTURE_X86) |
| 1027 | return PER_LINUX32; |
| 1028 | #endif |
| 1029 | |
| 1030 | return PERSONALITY_INVALID0xffffffffLU; |
| 1031 | } |
| 1032 | |
| 1033 | const char* personality_to_string(unsigned long p) { |
| 1034 | int architecture = _ARCHITECTURE_INVALID; |
| 1035 | |
| 1036 | if (p == PER_LINUX) |
| 1037 | architecture = native_architecture()ARCHITECTURE_X86_64; |
| 1038 | #ifdef SECONDARY_ARCHITECTUREARCHITECTURE_X86 |
| 1039 | else if (p == PER_LINUX32) |
| 1040 | architecture = SECONDARY_ARCHITECTUREARCHITECTURE_X86; |
| 1041 | #endif |
| 1042 | |
| 1043 | if (architecture < 0) |
| 1044 | return NULL((void*)0); |
| 1045 | |
| 1046 | return architecture_to_string(architecture); |
| 1047 | } |
| 1048 | |
| 1049 | int safe_personality(unsigned long p) { |
| 1050 | int ret; |
| 1051 | |
| 1052 | /* So here's the deal, personality() is weirdly defined by glibc. In some cases it returns a failure via errno, |
| 1053 | * and in others as negative return value containing an errno-like value. Let's work around this: this is a |
| 1054 | * wrapper that uses errno if it is set, and uses the return value otherwise. And then it sets both errno and |
| 1055 | * the return value indicating the same issue, so that we are definitely on the safe side. |
| 1056 | * |
| 1057 | * See https://github.com/systemd/systemd/issues/6737 */ |
| 1058 | |
| 1059 | errno(*__errno_location ()) = 0; |
| 1060 | ret = personality(p); |
| 1061 | if (ret < 0) { |
| 1062 | if (errno(*__errno_location ()) != 0) |
| 1063 | return -errno(*__errno_location ()); |
| 1064 | |
| 1065 | errno(*__errno_location ()) = -ret; |
| 1066 | } |
| 1067 | |
| 1068 | return ret; |
| 1069 | } |
| 1070 | |
| 1071 | int opinionated_personality(unsigned long *ret) { |
| 1072 | int current; |
| 1073 | |
| 1074 | /* Returns the current personality, or PERSONALITY_INVALID if we can't determine it. This function is a bit |
| 1075 | * opinionated though, and ignores all the finer-grained bits and exotic personalities, only distinguishing the |
| 1076 | * two most relevant personalities: PER_LINUX and PER_LINUX32. */ |
| 1077 | |
| 1078 | current = safe_personality(PERSONALITY_INVALID0xffffffffLU); |
| 1079 | if (current < 0) |
| 1080 | return current; |
| 1081 | |
| 1082 | if (((unsigned long) current & 0xffff) == PER_LINUX32) |
| 1083 | *ret = PER_LINUX32; |
| 1084 | else |
| 1085 | *ret = PER_LINUX; |
| 1086 | |
| 1087 | return 0; |
| 1088 | } |
| 1089 | |
| 1090 | void valgrind_summary_hack(void) { |
| 1091 | #if HAVE_VALGRIND_VALGRIND_H1 |
| 1092 | if (getpid_cached() == 1 && RUNNING_ON_VALGRIND(unsigned)__extension__ ({ volatile unsigned long int _zzq_args [6]; volatile unsigned long int _zzq_result; _zzq_args[0] = ( unsigned long int)(VG_USERREQ__RUNNING_ON_VALGRIND); _zzq_args [1] = (unsigned long int)(0); _zzq_args[2] = (unsigned long int )(0); _zzq_args[3] = (unsigned long int)(0); _zzq_args[4] = ( unsigned long int)(0); _zzq_args[5] = (unsigned long int)(0); __asm__ volatile("rolq $3, %%rdi ; rolq $13, %%rdi\n\t" "rolq $61, %%rdi ; rolq $51, %%rdi\n\t" "xchgq %%rbx,%%rbx" : "=d" (_zzq_result) : "a" (&_zzq_args [0]), "0" (0) : "cc", "memory" ); _zzq_result; })) { |
| 1093 | pid_t pid; |
| 1094 | pid = raw_clone(SIGCHLD17); |
| 1095 | if (pid < 0) |
| 1096 | log_emergency_errno(errno, "Failed to fork off valgrind helper: %m")({ int _level = ((log_emergency_level())), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm (_realm) >= ((_level) & 0x07)) ? log_internal_realm((( _realm) << 10 | (_level)), _e, "../src/basic/process-util.c" , 1096, __func__, "Failed to fork off valgrind helper: %m") : -abs(_e); }); |
| 1097 | else if (pid == 0) |
| 1098 | exit(EXIT_SUCCESS0); |
| 1099 | else { |
| 1100 | log_info("Spawned valgrind helper as PID "PID_FMT".", pid)({ int _level = (((6))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 1100, __func__, "Spawned valgrind helper as PID " "%" "i"".", pid) : -abs(_e); }); |
| 1101 | (void) wait_for_terminate(pid, NULL((void*)0)); |
| 1102 | } |
| 1103 | } |
| 1104 | #endif |
| 1105 | } |
| 1106 | |
| 1107 | int pid_compare_func(const void *a, const void *b) { |
| 1108 | const pid_t *p = a, *q = b; |
| 1109 | |
| 1110 | /* Suitable for usage in qsort() */ |
| 1111 | |
| 1112 | if (*p < *q) |
| 1113 | return -1; |
| 1114 | if (*p > *q) |
| 1115 | return 1; |
| 1116 | return 0; |
| 1117 | } |
| 1118 | |
| 1119 | int ioprio_parse_priority(const char *s, int *ret) { |
| 1120 | int i, r; |
| 1121 | |
| 1122 | assert(s)do { if ((__builtin_expect(!!(!(s)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("s"), "../src/basic/process-util.c", 1122 , __PRETTY_FUNCTION__); } while (0); |
| 1123 | assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/process-util.c", 1123 , __PRETTY_FUNCTION__); } while (0); |
| 1124 | |
| 1125 | r = safe_atoi(s, &i); |
| 1126 | if (r < 0) |
| 1127 | return r; |
| 1128 | |
| 1129 | if (!ioprio_priority_is_valid(i)) |
| 1130 | return -EINVAL22; |
| 1131 | |
| 1132 | *ret = i; |
| 1133 | return 0; |
| 1134 | } |
| 1135 | |
| 1136 | /* The cached PID, possible values: |
| 1137 | * |
| 1138 | * == UNSET [0] → cache not initialized yet |
| 1139 | * == BUSY [-1] → some thread is initializing it at the moment |
| 1140 | * any other → the cached PID |
| 1141 | */ |
| 1142 | |
| 1143 | #define CACHED_PID_UNSET((pid_t) 0) ((pid_t) 0) |
| 1144 | #define CACHED_PID_BUSY((pid_t) -1) ((pid_t) -1) |
| 1145 | |
| 1146 | static pid_t cached_pid = CACHED_PID_UNSET((pid_t) 0); |
| 1147 | |
| 1148 | void reset_cached_pid(void) { |
| 1149 | /* Invoked in the child after a fork(), i.e. at the first moment the PID changed */ |
| 1150 | cached_pid = CACHED_PID_UNSET((pid_t) 0); |
| 1151 | } |
| 1152 | |
| 1153 | /* We use glibc __register_atfork() + __dso_handle directly here, as they are not included in the glibc |
| 1154 | * headers. __register_atfork() is mostly equivalent to pthread_atfork(), but doesn't require us to link against |
| 1155 | * libpthread, as it is part of glibc anyway. */ |
| 1156 | extern int __register_atfork(void (*prepare) (void), void (*parent) (void), void (*child) (void), void * __dso_handle); |
| 1157 | extern void* __dso_handle __attribute__ ((__weak__)); |
| 1158 | |
| 1159 | pid_t getpid_cached(void) { |
| 1160 | static bool_Bool installed = false0; |
| 1161 | pid_t current_value; |
| 1162 | |
| 1163 | /* getpid_cached() is much like getpid(), but caches the value in local memory, to avoid having to invoke a |
| 1164 | * system call each time. This restores glibc behaviour from before 2.24, when getpid() was unconditionally |
| 1165 | * cached. Starting with 2.24 getpid() started to become prohibitively expensive when used for detecting when |
| 1166 | * objects were used across fork()s. With this caching the old behaviour is somewhat restored. |
| 1167 | * |
| 1168 | * https://bugzilla.redhat.com/show_bug.cgi?id=1443976 |
| 1169 | * https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c579f48edba88380635ab98cb612030e3ed8691e |
| 1170 | */ |
| 1171 | |
| 1172 | current_value = __sync_val_compare_and_swap(&cached_pid, CACHED_PID_UNSET((pid_t) 0), CACHED_PID_BUSY((pid_t) -1)); |
| 1173 | |
| 1174 | switch (current_value) { |
| 1175 | |
| 1176 | case CACHED_PID_UNSET((pid_t) 0): { /* Not initialized yet, then do so now */ |
| 1177 | pid_t new_pid; |
| 1178 | |
| 1179 | new_pid = raw_getpid(); |
| 1180 | |
| 1181 | if (!installed) { |
| 1182 | /* __register_atfork() either returns 0 or -ENOMEM, in its glibc implementation. Since it's |
| 1183 | * only half-documented (glibc doesn't document it but LSB does — though only superficially) |
| 1184 | * we'll check for errors only in the most generic fashion possible. */ |
| 1185 | |
| 1186 | if (__register_atfork(NULL((void*)0), NULL((void*)0), reset_cached_pid, __dso_handle) != 0) { |
| 1187 | /* OOM? Let's try again later */ |
| 1188 | cached_pid = CACHED_PID_UNSET((pid_t) 0); |
| 1189 | return new_pid; |
| 1190 | } |
| 1191 | |
| 1192 | installed = true1; |
| 1193 | } |
| 1194 | |
| 1195 | cached_pid = new_pid; |
| 1196 | return new_pid; |
| 1197 | } |
| 1198 | |
| 1199 | case CACHED_PID_BUSY((pid_t) -1): /* Somebody else is currently initializing */ |
| 1200 | return raw_getpid(); |
| 1201 | |
| 1202 | default: /* Properly initialized */ |
| 1203 | return current_value; |
| 1204 | } |
| 1205 | } |
| 1206 | |
| 1207 | int must_be_root(void) { |
| 1208 | |
| 1209 | if (geteuid() == 0) |
| 1210 | return 0; |
| 1211 | |
| 1212 | log_error("Need to be root.")({ int _level = (((3))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 1212, __func__, "Need to be root." ) : -abs(_e); }); |
| 1213 | return -EPERM1; |
| 1214 | } |
| 1215 | |
| 1216 | int safe_fork_full( |
| 1217 | const char *name, |
| 1218 | const int except_fds[], |
| 1219 | size_t n_except_fds, |
| 1220 | ForkFlags flags, |
| 1221 | pid_t *ret_pid) { |
| 1222 | |
| 1223 | pid_t original_pid, pid; |
| 1224 | sigset_t saved_ss, ss; |
| 1225 | bool_Bool block_signals = false0; |
| 1226 | int prio, r; |
| 1227 | |
| 1228 | /* A wrapper around fork(), that does a couple of important initializations in addition to mere forking. Always |
| 1229 | * returns the child's PID in *ret_pid. Returns == 0 in the child, and > 0 in the parent. */ |
| 1230 | |
| 1231 | prio = flags & FORK_LOG ? LOG_ERR3 : LOG_DEBUG7; |
| 1232 | |
| 1233 | original_pid = getpid_cached(); |
| 1234 | |
| 1235 | if (flags & (FORK_RESET_SIGNALS|FORK_DEATHSIG)) { |
| 1236 | |
| 1237 | /* We temporarily block all signals, so that the new child has them blocked initially. This way, we can |
| 1238 | * be sure that SIGTERMs are not lost we might send to the child. */ |
| 1239 | |
| 1240 | if (sigfillset(&ss) < 0) |
| 1241 | return log_full_errno(prio, errno, "Failed to reset signal set: %m")({ int _level = ((prio)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 1241, __func__ , "Failed to reset signal set: %m") : -abs(_e); }); |
| 1242 | |
| 1243 | block_signals = true1; |
| 1244 | |
| 1245 | } else if (flags & FORK_WAIT) { |
| 1246 | |
| 1247 | /* Let's block SIGCHLD at least, so that we can safely watch for the child process */ |
| 1248 | |
| 1249 | if (sigemptyset(&ss) < 0) |
| 1250 | return log_full_errno(prio, errno, "Failed to clear signal set: %m")({ int _level = ((prio)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 1250, __func__ , "Failed to clear signal set: %m") : -abs(_e); }); |
| 1251 | |
| 1252 | if (sigaddset(&ss, SIGCHLD17) < 0) |
| 1253 | return log_full_errno(prio, errno, "Failed to add SIGCHLD to signal set: %m")({ int _level = ((prio)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 1253, __func__ , "Failed to add SIGCHLD to signal set: %m") : -abs(_e); }); |
| 1254 | |
| 1255 | block_signals = true1; |
| 1256 | } |
| 1257 | |
| 1258 | if (block_signals) |
| 1259 | if (sigprocmask(SIG_SETMASK2, &ss, &saved_ss) < 0) |
| 1260 | return log_full_errno(prio, errno, "Failed to set signal mask: %m")({ int _level = ((prio)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 1260, __func__ , "Failed to set signal mask: %m") : -abs(_e); }); |
| 1261 | |
| 1262 | if (flags & FORK_NEW_MOUNTNS) |
| 1263 | pid = raw_clone(SIGCHLD17|CLONE_NEWNS0x00020000); |
| 1264 | else |
| 1265 | pid = fork(); |
| 1266 | if (pid < 0) { |
| 1267 | r = -errno(*__errno_location ()); |
| 1268 | |
| 1269 | if (block_signals) /* undo what we did above */ |
| 1270 | (void) sigprocmask(SIG_SETMASK2, &saved_ss, NULL((void*)0)); |
| 1271 | |
| 1272 | return log_full_errno(prio, r, "Failed to fork: %m")({ int _level = ((prio)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 1272, __func__, "Failed to fork: %m" ) : -abs(_e); }); |
| 1273 | } |
| 1274 | if (pid > 0) { |
| 1275 | /* We are in the parent process */ |
| 1276 | |
| 1277 | log_debug("Successfully forked off '%s' as PID " PID_FMT ".", strna(name), pid)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 1277, __func__, "Successfully forked off '%s' as PID " "%" "i" ".", strna(name), pid) : -abs(_e); }); |
| 1278 | |
| 1279 | if (flags & FORK_WAIT) { |
| 1280 | r = wait_for_terminate_and_check(name, pid, (flags & FORK_LOG ? WAIT_LOG : 0)); |
| 1281 | if (r < 0) |
| 1282 | return r; |
| 1283 | if (r != EXIT_SUCCESS0) /* exit status > 0 should be treated as failure, too */ |
| 1284 | return -EPROTO71; |
| 1285 | } |
| 1286 | |
| 1287 | if (block_signals) /* undo what we did above */ |
| 1288 | (void) sigprocmask(SIG_SETMASK2, &saved_ss, NULL((void*)0)); |
| 1289 | |
| 1290 | if (ret_pid) |
| 1291 | *ret_pid = pid; |
| 1292 | |
| 1293 | return 1; |
| 1294 | } |
| 1295 | |
| 1296 | /* We are in the child process */ |
| 1297 | |
| 1298 | if (flags & FORK_REOPEN_LOG) { |
| 1299 | /* Close the logs if requested, before we log anything. And make sure we reopen it if needed. */ |
| 1300 | log_close(); |
| 1301 | log_set_open_when_needed(true1); |
| 1302 | } |
| 1303 | |
| 1304 | if (name) { |
| 1305 | r = rename_process(name); |
| 1306 | if (r < 0) |
| 1307 | log_full_errno(flags & FORK_LOG ? LOG_WARNING : LOG_DEBUG,({ int _level = ((flags & FORK_LOG ? 4 : 7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm ) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 1308 , __func__, "Failed to rename process, ignoring: %m") : -abs( _e); }) |
| 1308 | r, "Failed to rename process, ignoring: %m")({ int _level = ((flags & FORK_LOG ? 4 : 7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm ) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 1308 , __func__, "Failed to rename process, ignoring: %m") : -abs( _e); }); |
| 1309 | } |
| 1310 | |
| 1311 | if (flags & FORK_DEATHSIG) |
| 1312 | if (prctl(PR_SET_PDEATHSIG1, SIGTERM15) < 0) { |
| 1313 | log_full_errno(prio, errno, "Failed to set death signal: %m")({ int _level = ((prio)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 1313, __func__ , "Failed to set death signal: %m") : -abs(_e); }); |
| 1314 | _exit(EXIT_FAILURE1); |
| 1315 | } |
| 1316 | |
| 1317 | if (flags & FORK_RESET_SIGNALS) { |
| 1318 | r = reset_all_signal_handlers(); |
| 1319 | if (r < 0) { |
| 1320 | log_full_errno(prio, r, "Failed to reset signal handlers: %m")({ int _level = ((prio)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 1320, __func__, "Failed to reset signal handlers: %m" ) : -abs(_e); }); |
| 1321 | _exit(EXIT_FAILURE1); |
| 1322 | } |
| 1323 | |
| 1324 | /* This implicitly undoes the signal mask stuff we did before the fork()ing above */ |
| 1325 | r = reset_signal_mask(); |
| 1326 | if (r < 0) { |
| 1327 | log_full_errno(prio, r, "Failed to reset signal mask: %m")({ int _level = ((prio)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 1327, __func__, "Failed to reset signal mask: %m" ) : -abs(_e); }); |
| 1328 | _exit(EXIT_FAILURE1); |
| 1329 | } |
| 1330 | } else if (block_signals) { /* undo what we did above */ |
| 1331 | if (sigprocmask(SIG_SETMASK2, &saved_ss, NULL((void*)0)) < 0) { |
| 1332 | log_full_errno(prio, errno, "Failed to restore signal mask: %m")({ int _level = ((prio)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 1332, __func__ , "Failed to restore signal mask: %m") : -abs(_e); }); |
| 1333 | _exit(EXIT_FAILURE1); |
| 1334 | } |
| 1335 | } |
| 1336 | |
| 1337 | if (flags & FORK_DEATHSIG) { |
| 1338 | pid_t ppid; |
| 1339 | /* Let's see if the parent PID is still the one we started from? If not, then the parent |
| 1340 | * already died by the time we set PR_SET_PDEATHSIG, hence let's emulate the effect */ |
| 1341 | |
| 1342 | ppid = getppid(); |
| 1343 | if (ppid == 0) |
| 1344 | /* Parent is in a differn't PID namespace. */; |
| 1345 | else if (ppid != original_pid) { |
| 1346 | log_debug("Parent died early, raising SIGTERM.")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 1346, __func__, "Parent died early, raising SIGTERM." ) : -abs(_e); }); |
| 1347 | (void) raise(SIGTERM15); |
| 1348 | _exit(EXIT_FAILURE1); |
| 1349 | } |
| 1350 | } |
| 1351 | |
| 1352 | if (FLAGS_SET(flags, FORK_NEW_MOUNTNS | FORK_MOUNTNS_SLAVE)(((flags) & (FORK_NEW_MOUNTNS | FORK_MOUNTNS_SLAVE)) == ( FORK_NEW_MOUNTNS | FORK_MOUNTNS_SLAVE))) { |
| 1353 | |
| 1354 | /* Optionally, make sure we never propagate mounts to the host. */ |
| 1355 | |
| 1356 | if (mount(NULL((void*)0), "/", NULL((void*)0), MS_SLAVEMS_SLAVE | MS_RECMS_REC, NULL((void*)0)) < 0) { |
| 1357 | log_full_errno(prio, errno, "Failed to remount root directory as MS_SLAVE: %m")({ int _level = ((prio)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 1357, __func__ , "Failed to remount root directory as MS_SLAVE: %m") : -abs( _e); }); |
| 1358 | _exit(EXIT_FAILURE1); |
| 1359 | } |
| 1360 | } |
| 1361 | |
| 1362 | if (flags & FORK_CLOSE_ALL_FDS) { |
| 1363 | /* Close the logs here in case it got reopened above, as close_all_fds() would close them for us */ |
| 1364 | log_close(); |
| 1365 | |
| 1366 | r = close_all_fds(except_fds, n_except_fds); |
| 1367 | if (r < 0) { |
| 1368 | log_full_errno(prio, r, "Failed to close all file descriptors: %m")({ int _level = ((prio)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 1368, __func__, "Failed to close all file descriptors: %m" ) : -abs(_e); }); |
| 1369 | _exit(EXIT_FAILURE1); |
| 1370 | } |
| 1371 | } |
| 1372 | |
| 1373 | /* When we were asked to reopen the logs, do so again now */ |
| 1374 | if (flags & FORK_REOPEN_LOG) { |
| 1375 | log_open(); |
| 1376 | log_set_open_when_needed(false0); |
| 1377 | } |
| 1378 | |
| 1379 | if (flags & FORK_NULL_STDIO) { |
| 1380 | r = make_null_stdio(); |
| 1381 | if (r < 0) { |
| 1382 | log_full_errno(prio, r, "Failed to connect stdin/stdout to /dev/null: %m")({ int _level = ((prio)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/process-util.c", 1382, __func__, "Failed to connect stdin/stdout to /dev/null: %m" ) : -abs(_e); }); |
| 1383 | _exit(EXIT_FAILURE1); |
| 1384 | } |
| 1385 | } |
| 1386 | |
| 1387 | if (ret_pid) |
| 1388 | *ret_pid = getpid_cached(); |
| 1389 | |
| 1390 | return 0; |
| 1391 | } |
| 1392 | |
| 1393 | int fork_agent(const char *name, const int except[], size_t n_except, pid_t *ret_pid, const char *path, ...) { |
| 1394 | bool_Bool stdout_is_tty, stderr_is_tty; |
| 1395 | size_t n, i; |
| 1396 | va_list ap; |
| 1397 | char **l; |
| 1398 | int r; |
| 1399 | |
| 1400 | assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/process-util.c", 1400 , __PRETTY_FUNCTION__); } while (0); |
| 1401 | |
| 1402 | /* Spawns a temporary TTY agent, making sure it goes away when we go away */ |
| 1403 | |
| 1404 | r = safe_fork_full(name, except, n_except, FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_CLOSE_ALL_FDS, ret_pid); |
| 1405 | if (r < 0) |
| 1406 | return r; |
| 1407 | if (r > 0) |
| 1408 | return 0; |
| 1409 | |
| 1410 | /* In the child: */ |
| 1411 | |
| 1412 | stdout_is_tty = isatty(STDOUT_FILENO1); |
| 1413 | stderr_is_tty = isatty(STDERR_FILENO2); |
| 1414 | |
| 1415 | if (!stdout_is_tty || !stderr_is_tty) { |
| 1416 | int fd; |
| 1417 | |
| 1418 | /* Detach from stdout/stderr. and reopen |
| 1419 | * /dev/tty for them. This is important to |
| 1420 | * ensure that when systemctl is started via |
| 1421 | * popen() or a similar call that expects to |
| 1422 | * read EOF we actually do generate EOF and |
| 1423 | * not delay this indefinitely by because we |
| 1424 | * keep an unused copy of stdin around. */ |
| 1425 | fd = open("/dev/tty", O_WRONLY01); |
| 1426 | if (fd < 0) { |
| 1427 | log_error_errno(errno, "Failed to open /dev/tty: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 1427, __func__ , "Failed to open /dev/tty: %m") : -abs(_e); }); |
| 1428 | _exit(EXIT_FAILURE1); |
| 1429 | } |
| 1430 | |
| 1431 | if (!stdout_is_tty && dup2(fd, STDOUT_FILENO1) < 0) { |
| 1432 | log_error_errno(errno, "Failed to dup2 /dev/tty: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 1432, __func__ , "Failed to dup2 /dev/tty: %m") : -abs(_e); }); |
| 1433 | _exit(EXIT_FAILURE1); |
| 1434 | } |
| 1435 | |
| 1436 | if (!stderr_is_tty && dup2(fd, STDERR_FILENO2) < 0) { |
| 1437 | log_error_errno(errno, "Failed to dup2 /dev/tty: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_SYSTEMD); (log_get_max_level_realm(_realm) >= ((_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/basic/process-util.c", 1437, __func__ , "Failed to dup2 /dev/tty: %m") : -abs(_e); }); |
| 1438 | _exit(EXIT_FAILURE1); |
| 1439 | } |
| 1440 | |
| 1441 | safe_close_above_stdio(fd); |
| 1442 | } |
| 1443 | |
| 1444 | /* Count arguments */ |
| 1445 | va_start(ap, path)__builtin_va_start(ap, path); |
| 1446 | for (n = 0; va_arg(ap, char*)__builtin_va_arg(ap, char*); n++) |
| 1447 | ; |
| 1448 | va_end(ap)__builtin_va_end(ap); |
| 1449 | |
| 1450 | /* Allocate strv */ |
| 1451 | l = newa(char*, n + 1)({ do { if ((__builtin_expect(!!(!(!size_multiply_overflow(sizeof (char*), n + 1))),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD , ("!size_multiply_overflow(sizeof(char*), n + 1)"), "../src/basic/process-util.c" , 1451, __PRETTY_FUNCTION__); } while (0); (char**) __builtin_alloca (sizeof(char*)*(n + 1)); }); |
| 1452 | |
| 1453 | /* Fill in arguments */ |
| 1454 | va_start(ap, path)__builtin_va_start(ap, path); |
| 1455 | for (i = 0; i <= n; i++) |
| 1456 | l[i] = va_arg(ap, char*)__builtin_va_arg(ap, char*); |
| 1457 | va_end(ap)__builtin_va_end(ap); |
| 1458 | |
| 1459 | execv(path, l); |
| 1460 | _exit(EXIT_FAILURE1); |
| 1461 | } |
| 1462 | |
| 1463 | int set_oom_score_adjust(int value) { |
| 1464 | char t[DECIMAL_STR_MAX(int)(2+(sizeof(int) <= 1 ? 3 : sizeof(int) <= 2 ? 5 : sizeof (int) <= 4 ? 10 : sizeof(int) <= 8 ? 20 : sizeof(int[-2 *(sizeof(int) > 8)])))]; |
| 1465 | |
| 1466 | sprintf(t, "%i", value); |
| 1467 | |
| 1468 | return write_string_file("/proc/self/oom_score_adj", t, |
| 1469 | WRITE_STRING_FILE_VERIFY_ON_FAILURE|WRITE_STRING_FILE_DISABLE_BUFFER); |
| 1470 | } |
| 1471 | |
| 1472 | static const char *const ioprio_class_table[] = { |
| 1473 | [IOPRIO_CLASS_NONE] = "none", |
| 1474 | [IOPRIO_CLASS_RT] = "realtime", |
| 1475 | [IOPRIO_CLASS_BE] = "best-effort", |
| 1476 | [IOPRIO_CLASS_IDLE] = "idle", |
| 1477 | }; |
| 1478 | |
| 1479 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, IOPRIO_N_CLASSES)int ioprio_class_to_string_alloc(int i, char **str) { char *s ; if (i < 0 || i > 8) return -34; if (i < (int) __extension__ (__builtin_choose_expr( !__builtin_types_compatible_p(typeof (ioprio_class_table), typeof(&*(ioprio_class_table))), sizeof (ioprio_class_table)/sizeof((ioprio_class_table)[0]), ((void) 0)))) { s = strdup(ioprio_class_table[i]); if (!s) return -12 ; } else { if (asprintf(&s, "%i", i) < 0) return -12; } *str = s; return 0; } int ioprio_class_from_string(const char *s) { int i; unsigned u = 0; if (!s) return (int) -1; for (i = 0; i < (int) __extension__ (__builtin_choose_expr( !__builtin_types_compatible_p (typeof(ioprio_class_table), typeof(&*(ioprio_class_table ))), sizeof(ioprio_class_table)/sizeof((ioprio_class_table)[0 ]), ((void)0))); i++) if (streq_ptr(ioprio_class_table[i], s) ) return i; if (safe_atou(s, &u) >= 0 && u <= 8) return (int) u; return (int) -1; }; |
| 1480 | |
| 1481 | static const char *const sigchld_code_table[] = { |
| 1482 | [CLD_EXITEDCLD_EXITED] = "exited", |
| 1483 | [CLD_KILLEDCLD_KILLED] = "killed", |
| 1484 | [CLD_DUMPEDCLD_DUMPED] = "dumped", |
| 1485 | [CLD_TRAPPEDCLD_TRAPPED] = "trapped", |
| 1486 | [CLD_STOPPEDCLD_STOPPED] = "stopped", |
| 1487 | [CLD_CONTINUEDCLD_CONTINUED] = "continued", |
| 1488 | }; |
| 1489 | |
| 1490 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int)const char *sigchld_code_to_string(int i) { if (i < 0 || i >= (int) __extension__ (__builtin_choose_expr( !__builtin_types_compatible_p (typeof(sigchld_code_table), typeof(&*(sigchld_code_table ))), sizeof(sigchld_code_table)/sizeof((sigchld_code_table)[0 ]), ((void)0)))) return ((void*)0); return sigchld_code_table [i]; } int sigchld_code_from_string(const char *s) { return ( int) string_table_lookup(sigchld_code_table, __extension__ (__builtin_choose_expr ( !__builtin_types_compatible_p(typeof(sigchld_code_table), typeof (&*(sigchld_code_table))), sizeof(sigchld_code_table)/sizeof ((sigchld_code_table)[0]), ((void)0))), s); }; |
| 1491 | |
| 1492 | static const char* const sched_policy_table[] = { |
| 1493 | [SCHED_OTHER0] = "other", |
| 1494 | [SCHED_BATCH3] = "batch", |
| 1495 | [SCHED_IDLE5] = "idle", |
| 1496 | [SCHED_FIFO1] = "fifo", |
| 1497 | [SCHED_RR2] = "rr", |
| 1498 | }; |
| 1499 | |
| 1500 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX)int sched_policy_to_string_alloc(int i, char **str) { char *s ; if (i < 0 || i > 2147483647) return -34; if (i < ( int) __extension__ (__builtin_choose_expr( !__builtin_types_compatible_p (typeof(sched_policy_table), typeof(&*(sched_policy_table ))), sizeof(sched_policy_table)/sizeof((sched_policy_table)[0 ]), ((void)0)))) { s = strdup(sched_policy_table[i]); if (!s) return -12; } else { if (asprintf(&s, "%i", i) < 0) return -12; } *str = s; return 0; } int sched_policy_from_string(const char *s) { int i; unsigned u = 0; if (!s) return (int) -1; for (i = 0; i < (int) __extension__ (__builtin_choose_expr( ! __builtin_types_compatible_p(typeof(sched_policy_table), typeof (&*(sched_policy_table))), sizeof(sched_policy_table)/sizeof ((sched_policy_table)[0]), ((void)0))); i++) if (streq_ptr(sched_policy_table [i], s)) return i; if (safe_atou(s, &u) >= 0 && u <= 2147483647) return (int) u; return (int) -1; }; |