| File: | build-scan/../src/basic/terminal-util.c |
| Warning: | line 189, column 21 2nd function call argument is an uninitialized value |
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| 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ | |||
| 2 | ||||
| 3 | #include <errno(*__errno_location ()).h> | |||
| 4 | #include <fcntl.h> | |||
| 5 | #include <limits.h> | |||
| 6 | #include <linux1/kd.h> | |||
| 7 | #include <linux1/tiocl.h> | |||
| 8 | #include <linux1/vt.h> | |||
| 9 | #include <poll.h> | |||
| 10 | #include <signal.h> | |||
| 11 | #include <stdarg.h> | |||
| 12 | #include <stddef.h> | |||
| 13 | #include <stdlib.h> | |||
| 14 | #include <string.h> | |||
| 15 | #include <sys/inotify.h> | |||
| 16 | #include <sys/ioctl.h> | |||
| 17 | #include <sys/socket.h> | |||
| 18 | #include <sys/sysmacros.h> | |||
| 19 | #include <sys/time.h> | |||
| 20 | #include <sys/types.h> | |||
| 21 | #include <sys/utsname.h> | |||
| 22 | #include <termios.h> | |||
| 23 | #include <unistd.h> | |||
| 24 | ||||
| 25 | #include "alloc-util.h" | |||
| 26 | #include "copy.h" | |||
| 27 | #include "def.h" | |||
| 28 | #include "env-util.h" | |||
| 29 | #include "fd-util.h" | |||
| 30 | #include "fileio.h" | |||
| 31 | #include "fs-util.h" | |||
| 32 | #include "io-util.h" | |||
| 33 | #include "log.h" | |||
| 34 | #include "macro.h" | |||
| 35 | #include "pager.h" | |||
| 36 | #include "parse-util.h" | |||
| 37 | #include "path-util.h" | |||
| 38 | #include "proc-cmdline.h" | |||
| 39 | #include "process-util.h" | |||
| 40 | #include "socket-util.h" | |||
| 41 | #include "stat-util.h" | |||
| 42 | #include "string-util.h" | |||
| 43 | #include "strv.h" | |||
| 44 | #include "terminal-util.h" | |||
| 45 | #include "time-util.h" | |||
| 46 | #include "util.h" | |||
| 47 | ||||
| 48 | static volatile unsigned cached_columns = 0; | |||
| 49 | static volatile unsigned cached_lines = 0; | |||
| 50 | ||||
| 51 | static volatile int cached_on_tty = -1; | |||
| 52 | static volatile int cached_colors_enabled = -1; | |||
| 53 | static volatile int cached_underline_enabled = -1; | |||
| 54 | ||||
| 55 | int chvt(int vt) { | |||
| 56 | _cleanup_close___attribute__((cleanup(closep))) int fd; | |||
| 57 | ||||
| 58 | /* Switch to the specified vt number. If the VT is specified <= 0 switch to the VT the kernel log messages go, | |||
| 59 | * if that's configured. */ | |||
| 60 | ||||
| 61 | fd = open_terminal("/dev/tty0", O_RDWR02|O_NOCTTY0400|O_CLOEXEC02000000|O_NONBLOCK04000); | |||
| 62 | if (fd < 0) | |||
| 63 | return -errno(*__errno_location ()); | |||
| 64 | ||||
| 65 | if (vt <= 0) { | |||
| 66 | int tiocl[2] = { | |||
| 67 | TIOCL_GETKMSGREDIRECT17, | |||
| 68 | 0 | |||
| 69 | }; | |||
| 70 | ||||
| 71 | if (ioctl(fd, TIOCLINUX0x541C, tiocl) < 0) | |||
| 72 | return -errno(*__errno_location ()); | |||
| 73 | ||||
| 74 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |||
| 75 | } | |||
| 76 | ||||
| 77 | if (ioctl(fd, VT_ACTIVATE0x5606, vt) < 0) | |||
| 78 | return -errno(*__errno_location ()); | |||
| 79 | ||||
| 80 | return 0; | |||
| 81 | } | |||
| 82 | ||||
| 83 | int read_one_char(FILE *f, char *ret, usec_t t, bool_Bool *need_nl) { | |||
| 84 | struct termios old_termios, new_termios; | |||
| 85 | char c, line[LINE_MAX2048]; | |||
| 86 | ||||
| 87 | assert(f)do { if ((__builtin_expect(!!(!(f)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("f"), "../src/basic/terminal-util.c", 87 , __PRETTY_FUNCTION__); } while (0); | |||
| 88 | assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/terminal-util.c", 88 , __PRETTY_FUNCTION__); } while (0); | |||
| 89 | ||||
| 90 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |||
| 91 | new_termios = old_termios; | |||
| 92 | ||||
| 93 | new_termios.c_lflag &= ~ICANON0000002; | |||
| 94 | new_termios.c_cc[VMIN6] = 1; | |||
| 95 | new_termios.c_cc[VTIME5] = 0; | |||
| 96 | ||||
| 97 | if (tcsetattr(fileno(f), TCSADRAIN1, &new_termios) >= 0) { | |||
| 98 | size_t k; | |||
| 99 | ||||
| 100 | if (t != USEC_INFINITY((usec_t) -1)) { | |||
| 101 | if (fd_wait_for_event(fileno(f), POLLIN0x001, t) <= 0) { | |||
| 102 | tcsetattr(fileno(f), TCSADRAIN1, &old_termios); | |||
| 103 | return -ETIMEDOUT110; | |||
| 104 | } | |||
| 105 | } | |||
| 106 | ||||
| 107 | k = fread(&c, 1, 1, f); | |||
| 108 | ||||
| 109 | tcsetattr(fileno(f), TCSADRAIN1, &old_termios); | |||
| 110 | ||||
| 111 | if (k <= 0) | |||
| 112 | return -EIO5; | |||
| 113 | ||||
| 114 | if (need_nl) | |||
| 115 | *need_nl = c != '\n'; | |||
| 116 | ||||
| 117 | *ret = c; | |||
| 118 | return 0; | |||
| 119 | } | |||
| 120 | } | |||
| 121 | ||||
| 122 | if (t != USEC_INFINITY((usec_t) -1)) { | |||
| 123 | if (fd_wait_for_event(fileno(f), POLLIN0x001, t) <= 0) | |||
| 124 | return -ETIMEDOUT110; | |||
| 125 | } | |||
| 126 | ||||
| 127 | errno(*__errno_location ()) = 0; | |||
| 128 | if (!fgets(line, sizeof(line), f)) | |||
| 129 | return errno(*__errno_location ()) > 0 ? -errno(*__errno_location ()) : -EIO5; | |||
| 130 | ||||
| 131 | truncate_nl(line); | |||
| 132 | ||||
| 133 | if (strlen(line) != 1) | |||
| 134 | return -EBADMSG74; | |||
| 135 | ||||
| 136 | if (need_nl) | |||
| 137 | *need_nl = false0; | |||
| 138 | ||||
| 139 | *ret = line[0]; | |||
| 140 | return 0; | |||
| 141 | } | |||
| 142 | ||||
| 143 | #define DEFAULT_ASK_REFRESH_USEC(2*((usec_t) 1000000ULL)) (2*USEC_PER_SEC((usec_t) 1000000ULL)) | |||
| 144 | ||||
| 145 | int ask_char(char *ret, const char *replies, const char *fmt, ...) { | |||
| 146 | int r; | |||
| 147 | ||||
| 148 | assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/terminal-util.c", 148 , __PRETTY_FUNCTION__); } while (0); | |||
| ||||
| 149 | assert(replies)do { if ((__builtin_expect(!!(!(replies)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("replies"), "../src/basic/terminal-util.c" , 149, __PRETTY_FUNCTION__); } while (0); | |||
| 150 | assert(fmt)do { if ((__builtin_expect(!!(!(fmt)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("fmt"), "../src/basic/terminal-util.c", 150 , __PRETTY_FUNCTION__); } while (0); | |||
| 151 | ||||
| 152 | for (;;) { | |||
| 153 | va_list ap; | |||
| 154 | char c; | |||
| 155 | bool_Bool need_nl = true1; | |||
| 156 | ||||
| 157 | if (colors_enabled()) | |||
| 158 | fputs(ANSI_HIGHLIGHT"\x1B[0;1;39m", stdoutstdout); | |||
| 159 | ||||
| 160 | putchar('\r'); | |||
| 161 | ||||
| 162 | va_start(ap, fmt)__builtin_va_start(ap, fmt); | |||
| 163 | vprintf(fmt, ap); | |||
| 164 | va_end(ap)__builtin_va_end(ap); | |||
| 165 | ||||
| 166 | if (colors_enabled()) | |||
| 167 | fputs(ANSI_NORMAL"\x1B[0m", stdoutstdout); | |||
| 168 | ||||
| 169 | fflush(stdoutstdout); | |||
| 170 | ||||
| 171 | r = read_one_char(stdinstdin, &c, DEFAULT_ASK_REFRESH_USEC(2*((usec_t) 1000000ULL)), &need_nl); | |||
| 172 | if (r < 0) { | |||
| 173 | ||||
| 174 | if (r == -ETIMEDOUT110) | |||
| 175 | continue; | |||
| 176 | ||||
| 177 | if (r == -EBADMSG74) { | |||
| 178 | puts("Bad input, please try again."); | |||
| 179 | continue; | |||
| 180 | } | |||
| 181 | ||||
| 182 | putchar('\n'); | |||
| 183 | return r; | |||
| 184 | } | |||
| 185 | ||||
| 186 | if (need_nl
| |||
| 187 | putchar('\n'); | |||
| 188 | ||||
| 189 | if (strchr(replies, c)) { | |||
| ||||
| 190 | *ret = c; | |||
| 191 | return 0; | |||
| 192 | } | |||
| 193 | ||||
| 194 | puts("Read unexpected character, please try again."); | |||
| 195 | } | |||
| 196 | } | |||
| 197 | ||||
| 198 | int ask_string(char **ret, const char *text, ...) { | |||
| 199 | assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/terminal-util.c", 199 , __PRETTY_FUNCTION__); } while (0); | |||
| 200 | assert(text)do { if ((__builtin_expect(!!(!(text)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("text"), "../src/basic/terminal-util.c", 200, __PRETTY_FUNCTION__); } while (0); | |||
| 201 | ||||
| 202 | for (;;) { | |||
| 203 | char line[LINE_MAX2048]; | |||
| 204 | va_list ap; | |||
| 205 | ||||
| 206 | if (colors_enabled()) | |||
| 207 | fputs(ANSI_HIGHLIGHT"\x1B[0;1;39m", stdoutstdout); | |||
| 208 | ||||
| 209 | va_start(ap, text)__builtin_va_start(ap, text); | |||
| 210 | vprintf(text, ap); | |||
| 211 | va_end(ap)__builtin_va_end(ap); | |||
| 212 | ||||
| 213 | if (colors_enabled()) | |||
| 214 | fputs(ANSI_NORMAL"\x1B[0m", stdoutstdout); | |||
| 215 | ||||
| 216 | fflush(stdoutstdout); | |||
| 217 | ||||
| 218 | errno(*__errno_location ()) = 0; | |||
| 219 | if (!fgets(line, sizeof(line), stdinstdin)) | |||
| 220 | return errno(*__errno_location ()) > 0 ? -errno(*__errno_location ()) : -EIO5; | |||
| 221 | ||||
| 222 | if (!endswith(line, "\n")) | |||
| 223 | putchar('\n'); | |||
| 224 | else { | |||
| 225 | char *s; | |||
| 226 | ||||
| 227 | if (isempty(line)) | |||
| 228 | continue; | |||
| 229 | ||||
| 230 | truncate_nl(line); | |||
| 231 | s = strdup(line); | |||
| 232 | if (!s) | |||
| 233 | return -ENOMEM12; | |||
| 234 | ||||
| 235 | *ret = s; | |||
| 236 | return 0; | |||
| 237 | } | |||
| 238 | } | |||
| 239 | } | |||
| 240 | ||||
| 241 | int reset_terminal_fd(int fd, bool_Bool switch_to_text) { | |||
| 242 | struct termios termios; | |||
| 243 | int r = 0; | |||
| 244 | ||||
| 245 | /* Set terminal to some sane defaults */ | |||
| 246 | ||||
| 247 | assert(fd >= 0)do { if ((__builtin_expect(!!(!(fd >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("fd >= 0"), "../src/basic/terminal-util.c" , 247, __PRETTY_FUNCTION__); } while (0); | |||
| 248 | ||||
| 249 | /* We leave locked terminal attributes untouched, so that | |||
| 250 | * Plymouth may set whatever it wants to set, and we don't | |||
| 251 | * interfere with that. */ | |||
| 252 | ||||
| 253 | /* Disable exclusive mode, just in case */ | |||
| 254 | (void) ioctl(fd, TIOCNXCL0x540D); | |||
| 255 | ||||
| 256 | /* Switch to text mode */ | |||
| 257 | if (switch_to_text) | |||
| 258 | (void) ioctl(fd, KDSETMODE0x4B3A, KD_TEXT0x00); | |||
| 259 | ||||
| 260 | /* Set default keyboard mode */ | |||
| 261 | (void) vt_reset_keyboard(fd); | |||
| 262 | ||||
| 263 | if (tcgetattr(fd, &termios) < 0) { | |||
| 264 | r = -errno(*__errno_location ()); | |||
| 265 | goto finish; | |||
| 266 | } | |||
| 267 | ||||
| 268 | /* We only reset the stuff that matters to the software. How | |||
| 269 | * hardware is set up we don't touch assuming that somebody | |||
| 270 | * else will do that for us */ | |||
| 271 | ||||
| 272 | termios.c_iflag &= ~(IGNBRK0000001 | BRKINT0000002 | ISTRIP0000040 | INLCR0000100 | IGNCR0000200 | IUCLC0001000); | |||
| 273 | termios.c_iflag |= ICRNL0000400 | IMAXBEL0020000 | IUTF80040000; | |||
| 274 | termios.c_oflag |= ONLCR0000004; | |||
| 275 | termios.c_cflag |= CREAD0000200; | |||
| 276 | termios.c_lflag = ISIG0000001 | ICANON0000002 | IEXTEN0100000 | ECHO0000010 | ECHOE0000020 | ECHOK0000040 | ECHOCTL0001000 | ECHOPRT0002000 | ECHOKE0004000; | |||
| 277 | ||||
| 278 | termios.c_cc[VINTR0] = 03; /* ^C */ | |||
| 279 | termios.c_cc[VQUIT1] = 034; /* ^\ */ | |||
| 280 | termios.c_cc[VERASE2] = 0177; | |||
| 281 | termios.c_cc[VKILL3] = 025; /* ^X */ | |||
| 282 | termios.c_cc[VEOF4] = 04; /* ^D */ | |||
| 283 | termios.c_cc[VSTART8] = 021; /* ^Q */ | |||
| 284 | termios.c_cc[VSTOP9] = 023; /* ^S */ | |||
| 285 | termios.c_cc[VSUSP10] = 032; /* ^Z */ | |||
| 286 | termios.c_cc[VLNEXT15] = 026; /* ^V */ | |||
| 287 | termios.c_cc[VWERASE14] = 027; /* ^W */ | |||
| 288 | termios.c_cc[VREPRINT12] = 022; /* ^R */ | |||
| 289 | termios.c_cc[VEOL11] = 0; | |||
| 290 | termios.c_cc[VEOL216] = 0; | |||
| 291 | ||||
| 292 | termios.c_cc[VTIME5] = 0; | |||
| 293 | termios.c_cc[VMIN6] = 1; | |||
| 294 | ||||
| 295 | if (tcsetattr(fd, TCSANOW0, &termios) < 0) | |||
| 296 | r = -errno(*__errno_location ()); | |||
| 297 | ||||
| 298 | finish: | |||
| 299 | /* Just in case, flush all crap out */ | |||
| 300 | (void) tcflush(fd, TCIOFLUSH2); | |||
| 301 | ||||
| 302 | return r; | |||
| 303 | } | |||
| 304 | ||||
| 305 | int reset_terminal(const char *name) { | |||
| 306 | _cleanup_close___attribute__((cleanup(closep))) int fd = -1; | |||
| 307 | ||||
| 308 | /* We open the terminal with O_NONBLOCK here, to ensure we | |||
| 309 | * don't block on carrier if this is a terminal with carrier | |||
| 310 | * configured. */ | |||
| 311 | ||||
| 312 | fd = open_terminal(name, O_RDWR02|O_NOCTTY0400|O_CLOEXEC02000000|O_NONBLOCK04000); | |||
| 313 | if (fd < 0) | |||
| 314 | return fd; | |||
| 315 | ||||
| 316 | return reset_terminal_fd(fd, true1); | |||
| 317 | } | |||
| 318 | ||||
| 319 | int open_terminal(const char *name, int mode) { | |||
| 320 | unsigned c = 0; | |||
| 321 | int fd; | |||
| 322 | ||||
| 323 | /* | |||
| 324 | * If a TTY is in the process of being closed opening it might | |||
| 325 | * cause EIO. This is horribly awful, but unlikely to be | |||
| 326 | * changed in the kernel. Hence we work around this problem by | |||
| 327 | * retrying a couple of times. | |||
| 328 | * | |||
| 329 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |||
| 330 | */ | |||
| 331 | ||||
| 332 | if (mode & O_CREAT0100) | |||
| 333 | return -EINVAL22; | |||
| 334 | ||||
| 335 | for (;;) { | |||
| 336 | fd = open(name, mode, 0); | |||
| 337 | if (fd >= 0) | |||
| 338 | break; | |||
| 339 | ||||
| 340 | if (errno(*__errno_location ()) != EIO5) | |||
| 341 | return -errno(*__errno_location ()); | |||
| 342 | ||||
| 343 | /* Max 1s in total */ | |||
| 344 | if (c >= 20) | |||
| 345 | return -errno(*__errno_location ()); | |||
| 346 | ||||
| 347 | usleep(50 * USEC_PER_MSEC((usec_t) 1000ULL)); | |||
| 348 | c++; | |||
| 349 | } | |||
| 350 | ||||
| 351 | if (isatty(fd) <= 0) { | |||
| 352 | safe_close(fd); | |||
| 353 | return -ENOTTY25; | |||
| 354 | } | |||
| 355 | ||||
| 356 | return fd; | |||
| 357 | } | |||
| 358 | ||||
| 359 | int acquire_terminal( | |||
| 360 | const char *name, | |||
| 361 | AcquireTerminalFlags flags, | |||
| 362 | usec_t timeout) { | |||
| 363 | ||||
| 364 | _cleanup_close___attribute__((cleanup(closep))) int notify = -1, fd = -1; | |||
| 365 | usec_t ts = USEC_INFINITY((usec_t) -1); | |||
| 366 | int r, wd = -1; | |||
| 367 | ||||
| 368 | assert(name)do { if ((__builtin_expect(!!(!(name)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("name"), "../src/basic/terminal-util.c", 368, __PRETTY_FUNCTION__); } while (0); | |||
| 369 | assert(IN_SET(flags & ~ACQUIRE_TERMINAL_PERMISSIVE, ACQUIRE_TERMINAL_TRY, ACQUIRE_TERMINAL_FORCE, ACQUIRE_TERMINAL_WAIT))do { if ((__builtin_expect(!!(!(({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended[20 - sizeof((int[]){ACQUIRE_TERMINAL_TRY, ACQUIRE_TERMINAL_FORCE , ACQUIRE_TERMINAL_WAIT})/sizeof(int)]; switch(flags & ~ACQUIRE_TERMINAL_PERMISSIVE ) { case ACQUIRE_TERMINAL_TRY: case ACQUIRE_TERMINAL_FORCE: case ACQUIRE_TERMINAL_WAIT: _found = 1; break; default: break; } _found ; }))),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("IN_SET(flags & ~ACQUIRE_TERMINAL_PERMISSIVE, ACQUIRE_TERMINAL_TRY, ACQUIRE_TERMINAL_FORCE, ACQUIRE_TERMINAL_WAIT)" ), "../src/basic/terminal-util.c", 369, __PRETTY_FUNCTION__); } while (0); | |||
| 370 | ||||
| 371 | /* We use inotify to be notified when the tty is closed. We create the watch before checking if we can actually | |||
| 372 | * acquire it, so that we don't lose any event. | |||
| 373 | * | |||
| 374 | * Note: strictly speaking this actually watches for the device being closed, it does *not* really watch | |||
| 375 | * whether a tty loses its controlling process. However, unless some rogue process uses TIOCNOTTY on /dev/tty | |||
| 376 | * *after* closing its tty otherwise this will not become a problem. As long as the administrator makes sure to | |||
| 377 | * not configure any service on the same tty as an untrusted user this should not be a problem. (Which they | |||
| 378 | * probably should not do anyway.) */ | |||
| 379 | ||||
| 380 | if ((flags & ~ACQUIRE_TERMINAL_PERMISSIVE) == ACQUIRE_TERMINAL_WAIT) { | |||
| 381 | notify = inotify_init1(IN_CLOEXECIN_CLOEXEC | (timeout != USEC_INFINITY((usec_t) -1) ? IN_NONBLOCKIN_NONBLOCK : 0)); | |||
| 382 | if (notify < 0) | |||
| 383 | return -errno(*__errno_location ()); | |||
| 384 | ||||
| 385 | wd = inotify_add_watch(notify, name, IN_CLOSE(0x00000008 | 0x00000010)); | |||
| 386 | if (wd < 0) | |||
| 387 | return -errno(*__errno_location ()); | |||
| 388 | ||||
| 389 | if (timeout != USEC_INFINITY((usec_t) -1)) | |||
| 390 | ts = now(CLOCK_MONOTONIC1); | |||
| 391 | } | |||
| 392 | ||||
| 393 | for (;;) { | |||
| 394 | struct sigaction sa_old, sa_new = { | |||
| 395 | .sa_handler__sigaction_handler.sa_handler = SIG_IGN((__sighandler_t) 1), | |||
| 396 | .sa_flags = SA_RESTART0x10000000, | |||
| 397 | }; | |||
| 398 | ||||
| 399 | if (notify >= 0) { | |||
| 400 | r = flush_fd(notify); | |||
| 401 | if (r < 0) | |||
| 402 | return r; | |||
| 403 | } | |||
| 404 | ||||
| 405 | /* We pass here O_NOCTTY only so that we can check the return value TIOCSCTTY and have a reliable way | |||
| 406 | * to figure out if we successfully became the controlling process of the tty */ | |||
| 407 | fd = open_terminal(name, O_RDWR02|O_NOCTTY0400|O_CLOEXEC02000000); | |||
| 408 | if (fd < 0) | |||
| 409 | return fd; | |||
| 410 | ||||
| 411 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed if we already own the tty. */ | |||
| 412 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0)do { if ((__builtin_expect(!!(!(sigaction(1, &sa_new, & sa_old) == 0)),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD , ("sigaction(SIGHUP, &sa_new, &sa_old) == 0"), "../src/basic/terminal-util.c" , 412, __PRETTY_FUNCTION__); } while (0); | |||
| 413 | ||||
| 414 | /* First, try to get the tty */ | |||
| 415 | r = ioctl(fd, TIOCSCTTY0x540E, | |||
| 416 | (flags & ~ACQUIRE_TERMINAL_PERMISSIVE) == ACQUIRE_TERMINAL_FORCE) < 0 ? -errno(*__errno_location ()) : 0; | |||
| 417 | ||||
| 418 | /* Reset signal handler to old value */ | |||
| 419 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0)do { if ((__builtin_expect(!!(!(sigaction(1, &sa_old, ((void *)0)) == 0)),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ( "sigaction(SIGHUP, &sa_old, NULL) == 0"), "../src/basic/terminal-util.c" , 419, __PRETTY_FUNCTION__); } while (0); | |||
| 420 | ||||
| 421 | /* Success? Exit the loop now! */ | |||
| 422 | if (r >= 0) | |||
| 423 | break; | |||
| 424 | ||||
| 425 | /* Any failure besides -EPERM? Fail, regardless of the mode. */ | |||
| 426 | if (r != -EPERM1) | |||
| 427 | return r; | |||
| 428 | ||||
| 429 | if (flags & ACQUIRE_TERMINAL_PERMISSIVE) /* If we are in permissive mode, then EPERM is fine, turn this | |||
| 430 | * into a success. Note that EPERM is also returned if we | |||
| 431 | * already are the owner of the TTY. */ | |||
| 432 | break; | |||
| 433 | ||||
| 434 | if (flags != ACQUIRE_TERMINAL_WAIT) /* If we are in TRY or FORCE mode, then propagate EPERM as EPERM */ | |||
| 435 | return r; | |||
| 436 | ||||
| 437 | assert(notify >= 0)do { if ((__builtin_expect(!!(!(notify >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("notify >= 0"), "../src/basic/terminal-util.c" , 437, __PRETTY_FUNCTION__); } while (0); | |||
| 438 | assert(wd >= 0)do { if ((__builtin_expect(!!(!(wd >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("wd >= 0"), "../src/basic/terminal-util.c" , 438, __PRETTY_FUNCTION__); } while (0); | |||
| 439 | ||||
| 440 | for (;;) { | |||
| 441 | union inotify_event_buffer buffer; | |||
| 442 | struct inotify_event *e; | |||
| 443 | ssize_t l; | |||
| 444 | ||||
| 445 | if (timeout != USEC_INFINITY((usec_t) -1)) { | |||
| 446 | usec_t n; | |||
| 447 | ||||
| 448 | assert(ts != USEC_INFINITY)do { if ((__builtin_expect(!!(!(ts != ((usec_t) -1))),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ts != USEC_INFINITY"), "../src/basic/terminal-util.c" , 448, __PRETTY_FUNCTION__); } while (0); | |||
| 449 | ||||
| 450 | n = now(CLOCK_MONOTONIC1); | |||
| 451 | if (ts + timeout < n) | |||
| 452 | return -ETIMEDOUT110; | |||
| 453 | ||||
| 454 | r = fd_wait_for_event(notify, POLLIN0x001, ts + timeout - n); | |||
| 455 | if (r < 0) | |||
| 456 | return r; | |||
| 457 | if (r == 0) | |||
| 458 | return -ETIMEDOUT110; | |||
| 459 | } | |||
| 460 | ||||
| 461 | l = read(notify, &buffer, sizeof(buffer)); | |||
| 462 | if (l < 0) { | |||
| 463 | if (IN_SET(errno, EINTR, EAGAIN)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended [20 - sizeof((int[]){4, 11})/sizeof(int)]; switch((*__errno_location ())) { case 4: case 11: _found = 1; break; default: break; } _found; })) | |||
| 464 | continue; | |||
| 465 | ||||
| 466 | return -errno(*__errno_location ()); | |||
| 467 | } | |||
| 468 | ||||
| 469 | FOREACH_INOTIFY_EVENT(e, buffer, l)for ((e) = &buffer.ev; (uint8_t*) (e) < (uint8_t*) (buffer .raw) + (l); (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof (struct inotify_event) + (e)->len)) { | |||
| 470 | if (e->mask & IN_Q_OVERFLOW0x00004000) /* If we hit an inotify queue overflow, simply check if the terminal is up for grabs now. */ | |||
| 471 | break; | |||
| 472 | ||||
| 473 | if (e->wd != wd || !(e->mask & IN_CLOSE(0x00000008 | 0x00000010))) /* Safety checks */ | |||
| 474 | return -EIO5; | |||
| 475 | } | |||
| 476 | ||||
| 477 | break; | |||
| 478 | } | |||
| 479 | ||||
| 480 | /* We close the tty fd here since if the old session ended our handle will be dead. It's important that | |||
| 481 | * we do this after sleeping, so that we don't enter an endless loop. */ | |||
| 482 | fd = safe_close(fd); | |||
| 483 | } | |||
| 484 | ||||
| 485 | return TAKE_FD(fd)({ int _fd_ = (fd); (fd) = -1; _fd_; }); | |||
| 486 | } | |||
| 487 | ||||
| 488 | int release_terminal(void) { | |||
| 489 | static const struct sigaction sa_new = { | |||
| 490 | .sa_handler__sigaction_handler.sa_handler = SIG_IGN((__sighandler_t) 1), | |||
| 491 | .sa_flags = SA_RESTART0x10000000, | |||
| 492 | }; | |||
| 493 | ||||
| 494 | _cleanup_close___attribute__((cleanup(closep))) int fd = -1; | |||
| 495 | struct sigaction sa_old; | |||
| 496 | int r; | |||
| 497 | ||||
| 498 | fd = open("/dev/tty", O_RDWR02|O_NOCTTY0400|O_CLOEXEC02000000|O_NONBLOCK04000); | |||
| 499 | if (fd < 0) | |||
| 500 | return -errno(*__errno_location ()); | |||
| 501 | ||||
| 502 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed | |||
| 503 | * by our own TIOCNOTTY */ | |||
| 504 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0)do { if ((__builtin_expect(!!(!(sigaction(1, &sa_new, & sa_old) == 0)),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD , ("sigaction(SIGHUP, &sa_new, &sa_old) == 0"), "../src/basic/terminal-util.c" , 504, __PRETTY_FUNCTION__); } while (0); | |||
| 505 | ||||
| 506 | r = ioctl(fd, TIOCNOTTY0x5422) < 0 ? -errno(*__errno_location ()) : 0; | |||
| 507 | ||||
| 508 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0)do { if ((__builtin_expect(!!(!(sigaction(1, &sa_old, ((void *)0)) == 0)),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ( "sigaction(SIGHUP, &sa_old, NULL) == 0"), "../src/basic/terminal-util.c" , 508, __PRETTY_FUNCTION__); } while (0); | |||
| 509 | ||||
| 510 | return r; | |||
| 511 | } | |||
| 512 | ||||
| 513 | int terminal_vhangup_fd(int fd) { | |||
| 514 | assert(fd >= 0)do { if ((__builtin_expect(!!(!(fd >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("fd >= 0"), "../src/basic/terminal-util.c" , 514, __PRETTY_FUNCTION__); } while (0); | |||
| 515 | ||||
| 516 | if (ioctl(fd, TIOCVHANGUP0x5437) < 0) | |||
| 517 | return -errno(*__errno_location ()); | |||
| 518 | ||||
| 519 | return 0; | |||
| 520 | } | |||
| 521 | ||||
| 522 | int terminal_vhangup(const char *name) { | |||
| 523 | _cleanup_close___attribute__((cleanup(closep))) int fd; | |||
| 524 | ||||
| 525 | fd = open_terminal(name, O_RDWR02|O_NOCTTY0400|O_CLOEXEC02000000|O_NONBLOCK04000); | |||
| 526 | if (fd < 0) | |||
| 527 | return fd; | |||
| 528 | ||||
| 529 | return terminal_vhangup_fd(fd); | |||
| 530 | } | |||
| 531 | ||||
| 532 | int vt_disallocate(const char *name) { | |||
| 533 | _cleanup_close___attribute__((cleanup(closep))) int fd = -1; | |||
| 534 | const char *e, *n; | |||
| 535 | unsigned u; | |||
| 536 | int r; | |||
| 537 | ||||
| 538 | /* Deallocate the VT if possible. If not possible | |||
| 539 | * (i.e. because it is the active one), at least clear it | |||
| 540 | * entirely (including the scrollback buffer) */ | |||
| 541 | ||||
| 542 | e = path_startswith(name, "/dev/"); | |||
| 543 | if (!e) | |||
| 544 | return -EINVAL22; | |||
| 545 | ||||
| 546 | if (!tty_is_vc(name)) { | |||
| 547 | /* So this is not a VT. I guess we cannot deallocate | |||
| 548 | * it then. But let's at least clear the screen */ | |||
| 549 | ||||
| 550 | fd = open_terminal(name, O_RDWR02|O_NOCTTY0400|O_CLOEXEC02000000); | |||
| 551 | if (fd < 0) | |||
| 552 | return fd; | |||
| 553 | ||||
| 554 | loop_write(fd, | |||
| 555 | "\033[r" /* clear scrolling region */ | |||
| 556 | "\033[H" /* move home */ | |||
| 557 | "\033[2J", /* clear screen */ | |||
| 558 | 10, false0); | |||
| 559 | return 0; | |||
| 560 | } | |||
| 561 | ||||
| 562 | n = startswith(e, "tty"); | |||
| 563 | if (!n) | |||
| 564 | return -EINVAL22; | |||
| 565 | ||||
| 566 | r = safe_atou(n, &u); | |||
| 567 | if (r < 0) | |||
| 568 | return r; | |||
| 569 | ||||
| 570 | if (u <= 0) | |||
| 571 | return -EINVAL22; | |||
| 572 | ||||
| 573 | /* Try to deallocate */ | |||
| 574 | fd = open_terminal("/dev/tty0", O_RDWR02|O_NOCTTY0400|O_CLOEXEC02000000|O_NONBLOCK04000); | |||
| 575 | if (fd < 0) | |||
| 576 | return fd; | |||
| 577 | ||||
| 578 | r = ioctl(fd, VT_DISALLOCATE0x5608, u); | |||
| 579 | fd = safe_close(fd); | |||
| 580 | ||||
| 581 | if (r >= 0) | |||
| 582 | return 0; | |||
| 583 | ||||
| 584 | if (errno(*__errno_location ()) != EBUSY16) | |||
| 585 | return -errno(*__errno_location ()); | |||
| 586 | ||||
| 587 | /* Couldn't deallocate, so let's clear it fully with | |||
| 588 | * scrollback */ | |||
| 589 | fd = open_terminal(name, O_RDWR02|O_NOCTTY0400|O_CLOEXEC02000000); | |||
| 590 | if (fd < 0) | |||
| 591 | return fd; | |||
| 592 | ||||
| 593 | loop_write(fd, | |||
| 594 | "\033[r" /* clear scrolling region */ | |||
| 595 | "\033[H" /* move home */ | |||
| 596 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |||
| 597 | 10, false0); | |||
| 598 | return 0; | |||
| 599 | } | |||
| 600 | ||||
| 601 | int make_console_stdio(void) { | |||
| 602 | int fd, r; | |||
| 603 | ||||
| 604 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |||
| 605 | ||||
| 606 | fd = acquire_terminal("/dev/console", ACQUIRE_TERMINAL_FORCE|ACQUIRE_TERMINAL_PERMISSIVE, USEC_INFINITY((usec_t) -1)); | |||
| 607 | if (fd < 0) | |||
| 608 | return log_error_errno(fd, "Failed to acquire terminal: %m")({ int _level = ((3)), _e = ((fd)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/terminal-util.c", 608, __func__, "Failed to acquire terminal: %m" ) : -abs(_e); }); | |||
| 609 | ||||
| 610 | r = reset_terminal_fd(fd, true1); | |||
| 611 | if (r < 0) | |||
| 612 | log_warning_errno(r, "Failed to reset terminal, ignoring: %m")({ int _level = ((4)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/terminal-util.c", 612, __func__, "Failed to reset terminal, ignoring: %m" ) : -abs(_e); }); | |||
| 613 | ||||
| 614 | r = rearrange_stdio(fd, fd, fd); /* This invalidates 'fd' both on success and on failure. */ | |||
| 615 | if (r < 0) | |||
| 616 | return log_error_errno(r, "Failed to make terminal stdin/stdout/stderr: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/terminal-util.c", 616, __func__, "Failed to make terminal stdin/stdout/stderr: %m" ) : -abs(_e); }); | |||
| 617 | ||||
| 618 | reset_terminal_feature_caches(); | |||
| 619 | ||||
| 620 | return 0; | |||
| 621 | } | |||
| 622 | ||||
| 623 | bool_Bool tty_is_vc(const char *tty) { | |||
| 624 | assert(tty)do { if ((__builtin_expect(!!(!(tty)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("tty"), "../src/basic/terminal-util.c", 624 , __PRETTY_FUNCTION__); } while (0); | |||
| 625 | ||||
| 626 | return vtnr_from_tty(tty) >= 0; | |||
| 627 | } | |||
| 628 | ||||
| 629 | bool_Bool tty_is_console(const char *tty) { | |||
| 630 | assert(tty)do { if ((__builtin_expect(!!(!(tty)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("tty"), "../src/basic/terminal-util.c", 630 , __PRETTY_FUNCTION__); } while (0); | |||
| 631 | ||||
| 632 | return streq(skip_dev_prefix(tty), "console")(strcmp((skip_dev_prefix(tty)),("console")) == 0); | |||
| 633 | } | |||
| 634 | ||||
| 635 | int vtnr_from_tty(const char *tty) { | |||
| 636 | int i, r; | |||
| 637 | ||||
| 638 | assert(tty)do { if ((__builtin_expect(!!(!(tty)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("tty"), "../src/basic/terminal-util.c", 638 , __PRETTY_FUNCTION__); } while (0); | |||
| 639 | ||||
| 640 | tty = skip_dev_prefix(tty); | |||
| 641 | ||||
| 642 | if (!startswith(tty, "tty") ) | |||
| 643 | return -EINVAL22; | |||
| 644 | ||||
| 645 | if (tty[3] < '0' || tty[3] > '9') | |||
| 646 | return -EINVAL22; | |||
| 647 | ||||
| 648 | r = safe_atoi(tty+3, &i); | |||
| 649 | if (r < 0) | |||
| 650 | return r; | |||
| 651 | ||||
| 652 | if (i < 0 || i > 63) | |||
| 653 | return -EINVAL22; | |||
| 654 | ||||
| 655 | return i; | |||
| 656 | } | |||
| 657 | ||||
| 658 | int resolve_dev_console(char **ret) { | |||
| 659 | _cleanup_free___attribute__((cleanup(freep))) char *active = NULL((void*)0); | |||
| 660 | char *tty; | |||
| 661 | int r; | |||
| 662 | ||||
| 663 | assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/terminal-util.c", 663 , __PRETTY_FUNCTION__); } while (0); | |||
| 664 | ||||
| 665 | /* Resolve where /dev/console is pointing to, if /sys is actually ours (i.e. not read-only-mounted which is a | |||
| 666 | * sign for container setups) */ | |||
| 667 | ||||
| 668 | if (path_is_read_only_fs("/sys") > 0) | |||
| 669 | return -ENOMEDIUM123; | |||
| 670 | ||||
| 671 | r = read_one_line_file("/sys/class/tty/console/active", &active); | |||
| 672 | if (r < 0) | |||
| 673 | return r; | |||
| 674 | ||||
| 675 | /* If multiple log outputs are configured the last one is what /dev/console points to */ | |||
| 676 | tty = strrchr(active, ' '); | |||
| 677 | if (tty) | |||
| 678 | tty++; | |||
| 679 | else | |||
| 680 | tty = active; | |||
| 681 | ||||
| 682 | if (streq(tty, "tty0")(strcmp((tty),("tty0")) == 0)) { | |||
| 683 | active = mfree(active); | |||
| 684 | ||||
| 685 | /* Get the active VC (e.g. tty1) */ | |||
| 686 | r = read_one_line_file("/sys/class/tty/tty0/active", &active); | |||
| 687 | if (r < 0) | |||
| 688 | return r; | |||
| 689 | ||||
| 690 | tty = active; | |||
| 691 | } | |||
| 692 | ||||
| 693 | if (tty == active) | |||
| 694 | *ret = TAKE_PTR(active)({ typeof(active) _ptr_ = (active); (active) = ((void*)0); _ptr_ ; }); | |||
| 695 | else { | |||
| 696 | char *tmp; | |||
| 697 | ||||
| 698 | tmp = strdup(tty); | |||
| 699 | if (!tmp) | |||
| 700 | return -ENOMEM12; | |||
| 701 | ||||
| 702 | *ret = tmp; | |||
| 703 | } | |||
| 704 | ||||
| 705 | return 0; | |||
| 706 | } | |||
| 707 | ||||
| 708 | int get_kernel_consoles(char ***ret) { | |||
| 709 | _cleanup_strv_free___attribute__((cleanup(strv_freep))) char **l = NULL((void*)0); | |||
| 710 | _cleanup_free___attribute__((cleanup(freep))) char *line = NULL((void*)0); | |||
| 711 | const char *p; | |||
| 712 | int r; | |||
| 713 | ||||
| 714 | assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/terminal-util.c", 714 , __PRETTY_FUNCTION__); } while (0); | |||
| 715 | ||||
| 716 | /* If /sys is mounted read-only this means we are running in some kind of container environment. In that | |||
| 717 | * case /sys would reflect the host system, not us, hence ignore the data we can read from it. */ | |||
| 718 | if (path_is_read_only_fs("/sys") > 0) | |||
| 719 | goto fallback; | |||
| 720 | ||||
| 721 | r = read_one_line_file("/sys/class/tty/console/active", &line); | |||
| 722 | if (r < 0) | |||
| 723 | return r; | |||
| 724 | ||||
| 725 | p = line; | |||
| 726 | for (;;) { | |||
| 727 | _cleanup_free___attribute__((cleanup(freep))) char *tty = NULL((void*)0); | |||
| 728 | char *path; | |||
| 729 | ||||
| 730 | r = extract_first_word(&p, &tty, NULL((void*)0), 0); | |||
| 731 | if (r < 0) | |||
| 732 | return r; | |||
| 733 | if (r == 0) | |||
| 734 | break; | |||
| 735 | ||||
| 736 | if (streq(tty, "tty0")(strcmp((tty),("tty0")) == 0)) { | |||
| 737 | tty = mfree(tty); | |||
| 738 | r = read_one_line_file("/sys/class/tty/tty0/active", &tty); | |||
| 739 | if (r < 0) | |||
| 740 | return r; | |||
| 741 | } | |||
| 742 | ||||
| 743 | path = strappend("/dev/", tty); | |||
| 744 | if (!path) | |||
| 745 | return -ENOMEM12; | |||
| 746 | ||||
| 747 | if (access(path, F_OK0) < 0) { | |||
| 748 | log_debug_errno(errno, "Console device %s is not accessible, skipping: %m", path)({ 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/terminal-util.c", 748, __func__ , "Console device %s is not accessible, skipping: %m", path) : -abs(_e); }); | |||
| 749 | free(path); | |||
| 750 | continue; | |||
| 751 | } | |||
| 752 | ||||
| 753 | r = strv_consume(&l, path); | |||
| 754 | if (r < 0) | |||
| 755 | return r; | |||
| 756 | } | |||
| 757 | ||||
| 758 | if (strv_isempty(l)) { | |||
| 759 | log_debug("No devices found for system console")({ 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/terminal-util.c", 759, __func__, "No devices found for system console" ) : -abs(_e); }); | |||
| 760 | goto fallback; | |||
| 761 | } | |||
| 762 | ||||
| 763 | *ret = TAKE_PTR(l)({ typeof(l) _ptr_ = (l); (l) = ((void*)0); _ptr_; }); | |||
| 764 | ||||
| 765 | return 0; | |||
| 766 | ||||
| 767 | fallback: | |||
| 768 | r = strv_extend(&l, "/dev/console"); | |||
| 769 | if (r < 0) | |||
| 770 | return r; | |||
| 771 | ||||
| 772 | *ret = TAKE_PTR(l)({ typeof(l) _ptr_ = (l); (l) = ((void*)0); _ptr_; }); | |||
| 773 | ||||
| 774 | return 0; | |||
| 775 | } | |||
| 776 | ||||
| 777 | bool_Bool tty_is_vc_resolve(const char *tty) { | |||
| 778 | _cleanup_free___attribute__((cleanup(freep))) char *resolved = NULL((void*)0); | |||
| 779 | ||||
| 780 | assert(tty)do { if ((__builtin_expect(!!(!(tty)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("tty"), "../src/basic/terminal-util.c", 780 , __PRETTY_FUNCTION__); } while (0); | |||
| 781 | ||||
| 782 | tty = skip_dev_prefix(tty); | |||
| 783 | ||||
| 784 | if (streq(tty, "console")(strcmp((tty),("console")) == 0)) { | |||
| 785 | if (resolve_dev_console(&resolved) < 0) | |||
| 786 | return false0; | |||
| 787 | ||||
| 788 | tty = resolved; | |||
| 789 | } | |||
| 790 | ||||
| 791 | return tty_is_vc(tty); | |||
| 792 | } | |||
| 793 | ||||
| 794 | const char *default_term_for_tty(const char *tty) { | |||
| 795 | return tty && tty_is_vc_resolve(tty) ? "linux" : "vt220"; | |||
| 796 | } | |||
| 797 | ||||
| 798 | int fd_columns(int fd) { | |||
| 799 | struct winsize ws = {}; | |||
| 800 | ||||
| 801 | if (ioctl(fd, TIOCGWINSZ0x5413, &ws) < 0) | |||
| 802 | return -errno(*__errno_location ()); | |||
| 803 | ||||
| 804 | if (ws.ws_col <= 0) | |||
| 805 | return -EIO5; | |||
| 806 | ||||
| 807 | return ws.ws_col; | |||
| 808 | } | |||
| 809 | ||||
| 810 | unsigned columns(void) { | |||
| 811 | const char *e; | |||
| 812 | int c; | |||
| 813 | ||||
| 814 | if (cached_columns > 0) | |||
| 815 | return cached_columns; | |||
| 816 | ||||
| 817 | c = 0; | |||
| 818 | e = getenv("COLUMNS"); | |||
| 819 | if (e) | |||
| 820 | (void) safe_atoi(e, &c); | |||
| 821 | ||||
| 822 | if (c <= 0) | |||
| 823 | c = fd_columns(STDOUT_FILENO1); | |||
| 824 | ||||
| 825 | if (c <= 0) | |||
| 826 | c = 80; | |||
| 827 | ||||
| 828 | cached_columns = c; | |||
| 829 | return cached_columns; | |||
| 830 | } | |||
| 831 | ||||
| 832 | int fd_lines(int fd) { | |||
| 833 | struct winsize ws = {}; | |||
| 834 | ||||
| 835 | if (ioctl(fd, TIOCGWINSZ0x5413, &ws) < 0) | |||
| 836 | return -errno(*__errno_location ()); | |||
| 837 | ||||
| 838 | if (ws.ws_row <= 0) | |||
| 839 | return -EIO5; | |||
| 840 | ||||
| 841 | return ws.ws_row; | |||
| 842 | } | |||
| 843 | ||||
| 844 | unsigned lines(void) { | |||
| 845 | const char *e; | |||
| 846 | int l; | |||
| 847 | ||||
| 848 | if (cached_lines > 0) | |||
| 849 | return cached_lines; | |||
| 850 | ||||
| 851 | l = 0; | |||
| 852 | e = getenv("LINES"); | |||
| 853 | if (e) | |||
| 854 | (void) safe_atoi(e, &l); | |||
| 855 | ||||
| 856 | if (l <= 0) | |||
| 857 | l = fd_lines(STDOUT_FILENO1); | |||
| 858 | ||||
| 859 | if (l <= 0) | |||
| 860 | l = 24; | |||
| 861 | ||||
| 862 | cached_lines = l; | |||
| 863 | return cached_lines; | |||
| 864 | } | |||
| 865 | ||||
| 866 | /* intended to be used as a SIGWINCH sighandler */ | |||
| 867 | void columns_lines_cache_reset(int signum) { | |||
| 868 | cached_columns = 0; | |||
| 869 | cached_lines = 0; | |||
| 870 | } | |||
| 871 | ||||
| 872 | void reset_terminal_feature_caches(void) { | |||
| 873 | cached_columns = 0; | |||
| 874 | cached_lines = 0; | |||
| 875 | ||||
| 876 | cached_colors_enabled = -1; | |||
| 877 | cached_underline_enabled = -1; | |||
| 878 | cached_on_tty = -1; | |||
| 879 | } | |||
| 880 | ||||
| 881 | bool_Bool on_tty(void) { | |||
| 882 | ||||
| 883 | /* We check both stdout and stderr, so that situations where pipes on the shell are used are reliably | |||
| 884 | * recognized, regardless if only the output or the errors are piped to some place. Since on_tty() is generally | |||
| 885 | * used to default to a safer, non-interactive, non-color mode of operation it's probably good to be defensive | |||
| 886 | * here, and check for both. Note that we don't check for STDIN_FILENO, because it should fine to use fancy | |||
| 887 | * terminal functionality when outputting stuff, even if the input is piped to us. */ | |||
| 888 | ||||
| 889 | if (cached_on_tty < 0) | |||
| 890 | cached_on_tty = | |||
| 891 | isatty(STDOUT_FILENO1) > 0 && | |||
| 892 | isatty(STDERR_FILENO2) > 0; | |||
| 893 | ||||
| 894 | return cached_on_tty; | |||
| 895 | } | |||
| 896 | ||||
| 897 | int getttyname_malloc(int fd, char **ret) { | |||
| 898 | size_t l = 100; | |||
| 899 | int r; | |||
| 900 | ||||
| 901 | assert(fd >= 0)do { if ((__builtin_expect(!!(!(fd >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("fd >= 0"), "../src/basic/terminal-util.c" , 901, __PRETTY_FUNCTION__); } while (0); | |||
| 902 | assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/terminal-util.c", 902 , __PRETTY_FUNCTION__); } while (0); | |||
| 903 | ||||
| 904 | for (;;) { | |||
| 905 | char path[l]; | |||
| 906 | ||||
| 907 | r = ttyname_r(fd, path, sizeof(path)); | |||
| 908 | if (r == 0) { | |||
| 909 | char *c; | |||
| 910 | ||||
| 911 | c = strdup(skip_dev_prefix(path)); | |||
| 912 | if (!c) | |||
| 913 | return -ENOMEM12; | |||
| 914 | ||||
| 915 | *ret = c; | |||
| 916 | return 0; | |||
| 917 | } | |||
| 918 | ||||
| 919 | if (r != ERANGE34) | |||
| 920 | return -r; | |||
| 921 | ||||
| 922 | l *= 2; | |||
| 923 | } | |||
| 924 | ||||
| 925 | return 0; | |||
| 926 | } | |||
| 927 | ||||
| 928 | int getttyname_harder(int fd, char **r) { | |||
| 929 | int k; | |||
| 930 | char *s = NULL((void*)0); | |||
| 931 | ||||
| 932 | k = getttyname_malloc(fd, &s); | |||
| 933 | if (k < 0) | |||
| 934 | return k; | |||
| 935 | ||||
| 936 | if (streq(s, "tty")(strcmp((s),("tty")) == 0)) { | |||
| 937 | free(s); | |||
| 938 | return get_ctty(0, NULL((void*)0), r); | |||
| 939 | } | |||
| 940 | ||||
| 941 | *r = s; | |||
| 942 | return 0; | |||
| 943 | } | |||
| 944 | ||||
| 945 | int get_ctty_devnr(pid_t pid, dev_t *d) { | |||
| 946 | int r; | |||
| 947 | _cleanup_free___attribute__((cleanup(freep))) char *line = NULL((void*)0); | |||
| 948 | const char *p; | |||
| 949 | unsigned long ttynr; | |||
| 950 | ||||
| 951 | assert(pid >= 0)do { if ((__builtin_expect(!!(!(pid >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid >= 0"), "../src/basic/terminal-util.c" , 951, __PRETTY_FUNCTION__); } while (0); | |||
| 952 | ||||
| 953 | 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_; }); | |||
| 954 | r = read_one_line_file(p, &line); | |||
| 955 | if (r < 0) | |||
| 956 | return r; | |||
| 957 | ||||
| 958 | p = strrchr(line, ')'); | |||
| 959 | if (!p) | |||
| 960 | return -EIO5; | |||
| 961 | ||||
| 962 | p++; | |||
| 963 | ||||
| 964 | if (sscanf(p, " " | |||
| 965 | "%*c " /* state */ | |||
| 966 | "%*d " /* ppid */ | |||
| 967 | "%*d " /* pgrp */ | |||
| 968 | "%*d " /* session */ | |||
| 969 | "%lu ", /* ttynr */ | |||
| 970 | &ttynr) != 1) | |||
| 971 | return -EIO5; | |||
| 972 | ||||
| 973 | if (major(ttynr)gnu_dev_major (ttynr) == 0 && minor(ttynr)gnu_dev_minor (ttynr) == 0) | |||
| 974 | return -ENXIO6; | |||
| 975 | ||||
| 976 | if (d) | |||
| 977 | *d = (dev_t) ttynr; | |||
| 978 | ||||
| 979 | return 0; | |||
| 980 | } | |||
| 981 | ||||
| 982 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { | |||
| 983 | char fn[STRLEN("/dev/char/")(sizeof("""/dev/char/""") - 1) + 2*DECIMAL_STR_MAX(unsigned)(2+(sizeof(unsigned) <= 1 ? 3 : sizeof(unsigned) <= 2 ? 5 : sizeof(unsigned) <= 4 ? 10 : sizeof(unsigned) <= 8 ? 20 : sizeof(int[-2*(sizeof(unsigned) > 8)]))) + 1 + 1], *b = NULL((void*)0); | |||
| 984 | _cleanup_free___attribute__((cleanup(freep))) char *s = NULL((void*)0); | |||
| 985 | const char *p; | |||
| 986 | dev_t devnr; | |||
| 987 | int k; | |||
| 988 | ||||
| 989 | assert(r)do { if ((__builtin_expect(!!(!(r)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("r"), "../src/basic/terminal-util.c", 989 , __PRETTY_FUNCTION__); } while (0); | |||
| 990 | ||||
| 991 | k = get_ctty_devnr(pid, &devnr); | |||
| 992 | if (k < 0) | |||
| 993 | return k; | |||
| 994 | ||||
| 995 | sprintf(fn, "/dev/char/%u:%u", major(devnr)gnu_dev_major (devnr), minor(devnr)gnu_dev_minor (devnr)); | |||
| 996 | ||||
| 997 | k = readlink_malloc(fn, &s); | |||
| 998 | if (k < 0) { | |||
| 999 | ||||
| 1000 | if (k != -ENOENT2) | |||
| 1001 | return k; | |||
| 1002 | ||||
| 1003 | /* This is an ugly hack */ | |||
| 1004 | if (major(devnr)gnu_dev_major (devnr) == 136) { | |||
| 1005 | if (asprintf(&b, "pts/%u", minor(devnr)gnu_dev_minor (devnr)) < 0) | |||
| 1006 | return -ENOMEM12; | |||
| 1007 | } else { | |||
| 1008 | /* Probably something like the ptys which have no | |||
| 1009 | * symlink in /dev/char. Let's return something | |||
| 1010 | * vaguely useful. */ | |||
| 1011 | ||||
| 1012 | b = strdup(fn + 5); | |||
| 1013 | if (!b) | |||
| 1014 | return -ENOMEM12; | |||
| 1015 | } | |||
| 1016 | } else { | |||
| 1017 | if (startswith(s, "/dev/")) | |||
| 1018 | p = s + 5; | |||
| 1019 | else if (startswith(s, "../")) | |||
| 1020 | p = s + 3; | |||
| 1021 | else | |||
| 1022 | p = s; | |||
| 1023 | ||||
| 1024 | b = strdup(p); | |||
| 1025 | if (!b) | |||
| 1026 | return -ENOMEM12; | |||
| 1027 | } | |||
| 1028 | ||||
| 1029 | *r = b; | |||
| 1030 | if (_devnr) | |||
| 1031 | *_devnr = devnr; | |||
| 1032 | ||||
| 1033 | return 0; | |||
| 1034 | } | |||
| 1035 | ||||
| 1036 | int ptsname_malloc(int fd, char **ret) { | |||
| 1037 | size_t l = 100; | |||
| 1038 | ||||
| 1039 | assert(fd >= 0)do { if ((__builtin_expect(!!(!(fd >= 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("fd >= 0"), "../src/basic/terminal-util.c" , 1039, __PRETTY_FUNCTION__); } while (0); | |||
| 1040 | assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("ret"), "../src/basic/terminal-util.c", 1040 , __PRETTY_FUNCTION__); } while (0); | |||
| 1041 | ||||
| 1042 | for (;;) { | |||
| 1043 | char *c; | |||
| 1044 | ||||
| 1045 | c = new(char, l)((char*) malloc_multiply(sizeof(char), (l))); | |||
| 1046 | if (!c) | |||
| 1047 | return -ENOMEM12; | |||
| 1048 | ||||
| 1049 | if (ptsname_r(fd, c, l) == 0) { | |||
| 1050 | *ret = c; | |||
| 1051 | return 0; | |||
| 1052 | } | |||
| 1053 | if (errno(*__errno_location ()) != ERANGE34) { | |||
| 1054 | free(c); | |||
| 1055 | return -errno(*__errno_location ()); | |||
| 1056 | } | |||
| 1057 | ||||
| 1058 | free(c); | |||
| 1059 | l *= 2; | |||
| 1060 | } | |||
| 1061 | } | |||
| 1062 | ||||
| 1063 | int ptsname_namespace(int pty, char **ret) { | |||
| 1064 | int no = -1, r; | |||
| 1065 | ||||
| 1066 | /* Like ptsname(), but doesn't assume that the path is | |||
| 1067 | * accessible in the local namespace. */ | |||
| 1068 | ||||
| 1069 | r = ioctl(pty, TIOCGPTN(((2U) << (((0 +8)+8)+14)) | ((('T')) << (0 +8)) | (((0x30)) << 0) | ((((sizeof(unsigned int)))) << ((0 +8)+8))), &no); | |||
| 1070 | if (r < 0) | |||
| 1071 | return -errno(*__errno_location ()); | |||
| 1072 | ||||
| 1073 | if (no < 0) | |||
| 1074 | return -EIO5; | |||
| 1075 | ||||
| 1076 | if (asprintf(ret, "/dev/pts/%i", no) < 0) | |||
| 1077 | return -ENOMEM12; | |||
| 1078 | ||||
| 1079 | return 0; | |||
| 1080 | } | |||
| 1081 | ||||
| 1082 | int openpt_in_namespace(pid_t pid, int flags) { | |||
| 1083 | _cleanup_close___attribute__((cleanup(closep))) int pidnsfd = -1, mntnsfd = -1, usernsfd = -1, rootfd = -1; | |||
| 1084 | _cleanup_close_pair___attribute__((cleanup(close_pairp))) int pair[2] = { -1, -1 }; | |||
| 1085 | pid_t child; | |||
| 1086 | int r; | |||
| 1087 | ||||
| 1088 | assert(pid > 0)do { if ((__builtin_expect(!!(!(pid > 0)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("pid > 0"), "../src/basic/terminal-util.c" , 1088, __PRETTY_FUNCTION__); } while (0); | |||
| 1089 | ||||
| 1090 | r = namespace_open(pid, &pidnsfd, &mntnsfd, NULL((void*)0), &usernsfd, &rootfd); | |||
| 1091 | if (r < 0) | |||
| 1092 | return r; | |||
| 1093 | ||||
| 1094 | if (socketpair(AF_UNIX1, SOCK_DGRAMSOCK_DGRAM, 0, pair) < 0) | |||
| 1095 | return -errno(*__errno_location ()); | |||
| 1096 | ||||
| 1097 | r = safe_fork("(sd-openpt)", FORK_RESET_SIGNALS|FORK_DEATHSIG, &child); | |||
| 1098 | if (r < 0) | |||
| 1099 | return r; | |||
| 1100 | if (r == 0) { | |||
| 1101 | int master; | |||
| 1102 | ||||
| 1103 | pair[0] = safe_close(pair[0]); | |||
| 1104 | ||||
| 1105 | r = namespace_enter(pidnsfd, mntnsfd, -1, usernsfd, rootfd); | |||
| 1106 | if (r < 0) | |||
| 1107 | _exit(EXIT_FAILURE1); | |||
| 1108 | ||||
| 1109 | master = posix_openpt(flags|O_NOCTTY0400|O_CLOEXEC02000000); | |||
| 1110 | if (master < 0) | |||
| 1111 | _exit(EXIT_FAILURE1); | |||
| 1112 | ||||
| 1113 | if (unlockpt(master) < 0) | |||
| 1114 | _exit(EXIT_FAILURE1); | |||
| 1115 | ||||
| 1116 | if (send_one_fd(pair[1], master, 0)send_one_fd_iov_sa(pair[1], master, ((void*)0), 0, ((void*)0) , 0, 0) < 0) | |||
| 1117 | _exit(EXIT_FAILURE1); | |||
| 1118 | ||||
| 1119 | _exit(EXIT_SUCCESS0); | |||
| 1120 | } | |||
| 1121 | ||||
| 1122 | pair[1] = safe_close(pair[1]); | |||
| 1123 | ||||
| 1124 | r = wait_for_terminate_and_check("(sd-openpt)", child, 0); | |||
| 1125 | if (r < 0) | |||
| 1126 | return r; | |||
| 1127 | if (r != EXIT_SUCCESS0) | |||
| 1128 | return -EIO5; | |||
| 1129 | ||||
| 1130 | return receive_one_fd(pair[0], 0); | |||
| 1131 | } | |||
| 1132 | ||||
| 1133 | int open_terminal_in_namespace(pid_t pid, const char *name, int mode) { | |||
| 1134 | _cleanup_close___attribute__((cleanup(closep))) int pidnsfd = -1, mntnsfd = -1, usernsfd = -1, rootfd = -1; | |||
| 1135 | _cleanup_close_pair___attribute__((cleanup(close_pairp))) int pair[2] = { -1, -1 }; | |||
| 1136 | pid_t child; | |||
| 1137 | int r; | |||
| 1138 | ||||
| 1139 | r = namespace_open(pid, &pidnsfd, &mntnsfd, NULL((void*)0), &usernsfd, &rootfd); | |||
| 1140 | if (r < 0) | |||
| 1141 | return r; | |||
| 1142 | ||||
| 1143 | if (socketpair(AF_UNIX1, SOCK_DGRAMSOCK_DGRAM, 0, pair) < 0) | |||
| 1144 | return -errno(*__errno_location ()); | |||
| 1145 | ||||
| 1146 | r = safe_fork("(sd-terminal)", FORK_RESET_SIGNALS|FORK_DEATHSIG, &child); | |||
| 1147 | if (r < 0) | |||
| 1148 | return r; | |||
| 1149 | if (r == 0) { | |||
| 1150 | int master; | |||
| 1151 | ||||
| 1152 | pair[0] = safe_close(pair[0]); | |||
| 1153 | ||||
| 1154 | r = namespace_enter(pidnsfd, mntnsfd, -1, usernsfd, rootfd); | |||
| 1155 | if (r < 0) | |||
| 1156 | _exit(EXIT_FAILURE1); | |||
| 1157 | ||||
| 1158 | master = open_terminal(name, mode|O_NOCTTY0400|O_CLOEXEC02000000); | |||
| 1159 | if (master < 0) | |||
| 1160 | _exit(EXIT_FAILURE1); | |||
| 1161 | ||||
| 1162 | if (send_one_fd(pair[1], master, 0)send_one_fd_iov_sa(pair[1], master, ((void*)0), 0, ((void*)0) , 0, 0) < 0) | |||
| 1163 | _exit(EXIT_FAILURE1); | |||
| 1164 | ||||
| 1165 | _exit(EXIT_SUCCESS0); | |||
| 1166 | } | |||
| 1167 | ||||
| 1168 | pair[1] = safe_close(pair[1]); | |||
| 1169 | ||||
| 1170 | r = wait_for_terminate_and_check("(sd-terminal)", child, 0); | |||
| 1171 | if (r < 0) | |||
| 1172 | return r; | |||
| 1173 | if (r != EXIT_SUCCESS0) | |||
| 1174 | return -EIO5; | |||
| 1175 | ||||
| 1176 | return receive_one_fd(pair[0], 0); | |||
| 1177 | } | |||
| 1178 | ||||
| 1179 | static bool_Bool getenv_terminal_is_dumb(void) { | |||
| 1180 | const char *e; | |||
| 1181 | ||||
| 1182 | e = getenv("TERM"); | |||
| 1183 | if (!e) | |||
| 1184 | return true1; | |||
| 1185 | ||||
| 1186 | return streq(e, "dumb")(strcmp((e),("dumb")) == 0); | |||
| 1187 | } | |||
| 1188 | ||||
| 1189 | bool_Bool terminal_is_dumb(void) { | |||
| 1190 | if (!on_tty()) | |||
| 1191 | return true1; | |||
| 1192 | ||||
| 1193 | return getenv_terminal_is_dumb(); | |||
| 1194 | } | |||
| 1195 | ||||
| 1196 | bool_Bool colors_enabled(void) { | |||
| 1197 | ||||
| 1198 | /* Returns true if colors are considered supported on our stdout. For that we check $SYSTEMD_COLORS first | |||
| 1199 | * (which is the explicit way to turn colors on/off). If that didn't work we turn colors off unless we are on a | |||
| 1200 | * TTY. And if we are on a TTY we turn it off if $TERM is set to "dumb". There's one special tweak though: if | |||
| 1201 | * we are PID 1 then we do not check whether we are connected to a TTY, because we don't keep /dev/console open | |||
| 1202 | * continously due to fear of SAK, and hence things are a bit weird. */ | |||
| 1203 | ||||
| 1204 | if (cached_colors_enabled < 0) { | |||
| 1205 | int val; | |||
| 1206 | ||||
| 1207 | val = getenv_bool("SYSTEMD_COLORS"); | |||
| 1208 | if (val >= 0) | |||
| 1209 | cached_colors_enabled = val; | |||
| 1210 | else if (getpid_cached() == 1) | |||
| 1211 | /* PID1 outputs to the console without holding it open all the time */ | |||
| 1212 | cached_colors_enabled = !getenv_terminal_is_dumb(); | |||
| 1213 | else | |||
| 1214 | cached_colors_enabled = !terminal_is_dumb(); | |||
| 1215 | } | |||
| 1216 | ||||
| 1217 | return cached_colors_enabled; | |||
| 1218 | } | |||
| 1219 | ||||
| 1220 | bool_Bool dev_console_colors_enabled(void) { | |||
| 1221 | _cleanup_free___attribute__((cleanup(freep))) char *s = NULL((void*)0); | |||
| 1222 | int b; | |||
| 1223 | ||||
| 1224 | /* Returns true if we assume that color is supported on /dev/console. | |||
| 1225 | * | |||
| 1226 | * For that we first check if we explicitly got told to use colors or not, by checking $SYSTEMD_COLORS. If that | |||
| 1227 | * isn't set we check whether PID 1 has $TERM set, and if not, whether TERM is set on the kernel command | |||
| 1228 | * line. If we find $TERM set we assume color if it's not set to "dumb", similarly to how regular | |||
| 1229 | * colors_enabled() operates. */ | |||
| 1230 | ||||
| 1231 | b = getenv_bool("SYSTEMD_COLORS"); | |||
| 1232 | if (b >= 0) | |||
| 1233 | return b; | |||
| 1234 | ||||
| 1235 | if (getenv_for_pid(1, "TERM", &s) <= 0) | |||
| 1236 | (void) proc_cmdline_get_key("TERM", 0, &s); | |||
| 1237 | ||||
| 1238 | return !streq_ptr(s, "dumb"); | |||
| 1239 | } | |||
| 1240 | ||||
| 1241 | bool_Bool underline_enabled(void) { | |||
| 1242 | ||||
| 1243 | if (cached_underline_enabled < 0) { | |||
| 1244 | ||||
| 1245 | /* The Linux console doesn't support underlining, turn it off, but only there. */ | |||
| 1246 | ||||
| 1247 | if (colors_enabled()) | |||
| 1248 | cached_underline_enabled = !streq_ptr(getenv("TERM"), "linux"); | |||
| 1249 | else | |||
| 1250 | cached_underline_enabled = false0; | |||
| 1251 | } | |||
| 1252 | ||||
| 1253 | return cached_underline_enabled; | |||
| 1254 | } | |||
| 1255 | ||||
| 1256 | int vt_default_utf8(void) { | |||
| 1257 | _cleanup_free___attribute__((cleanup(freep))) char *b = NULL((void*)0); | |||
| 1258 | int r; | |||
| 1259 | ||||
| 1260 | /* Read the default VT UTF8 setting from the kernel */ | |||
| 1261 | ||||
| 1262 | r = read_one_line_file("/sys/module/vt/parameters/default_utf8", &b); | |||
| 1263 | if (r < 0) | |||
| 1264 | return r; | |||
| 1265 | ||||
| 1266 | return parse_boolean(b); | |||
| 1267 | } | |||
| 1268 | ||||
| 1269 | int vt_reset_keyboard(int fd) { | |||
| 1270 | int kb; | |||
| 1271 | ||||
| 1272 | /* If we can't read the default, then default to unicode. It's 2017 after all. */ | |||
| 1273 | kb = vt_default_utf8() != 0 ? K_UNICODE0x03 : K_XLATE0x01; | |||
| 1274 | ||||
| 1275 | if (ioctl(fd, KDSKBMODE0x4B45, kb) < 0) | |||
| 1276 | return -errno(*__errno_location ()); | |||
| 1277 | ||||
| 1278 | return 0; | |||
| 1279 | } | |||
| 1280 | ||||
| 1281 | static bool_Bool urlify_enabled(void) { | |||
| 1282 | static int cached_urlify_enabled = -1; | |||
| 1283 | ||||
| 1284 | /* Unfortunately 'less' doesn't support links like this yet ðŸ˜, hence let's disable this as long as there's a | |||
| 1285 | * pager in effect. Let's drop this check as soon as less got fixed a and enough time passed so that it's safe | |||
| 1286 | * to assume that a link-enabled 'less' version has hit most installations. */ | |||
| 1287 | ||||
| 1288 | if (cached_urlify_enabled < 0) { | |||
| 1289 | int val; | |||
| 1290 | ||||
| 1291 | val = getenv_bool("SYSTEMD_URLIFY"); | |||
| 1292 | if (val >= 0) | |||
| 1293 | cached_urlify_enabled = val; | |||
| 1294 | else | |||
| 1295 | cached_urlify_enabled = colors_enabled() && !pager_have(); | |||
| 1296 | } | |||
| 1297 | ||||
| 1298 | return cached_urlify_enabled; | |||
| 1299 | } | |||
| 1300 | ||||
| 1301 | int terminal_urlify(const char *url, const char *text, char **ret) { | |||
| 1302 | char *n; | |||
| 1303 | ||||
| 1304 | assert(url)do { if ((__builtin_expect(!!(!(url)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("url"), "../src/basic/terminal-util.c", 1304 , __PRETTY_FUNCTION__); } while (0); | |||
| 1305 | ||||
| 1306 | /* Takes an URL and a pretty string and formats it as clickable link for the terminal. See | |||
| 1307 | * https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda for details. */ | |||
| 1308 | ||||
| 1309 | if (isempty(text)) | |||
| 1310 | text = url; | |||
| 1311 | ||||
| 1312 | if (urlify_enabled()) | |||
| 1313 | n = strjoin("\x1B]8;;", url, "\a", text, "\x1B]8;;\a")strjoin_real(("\x1B]8;;"), url, "\a", text, "\x1B]8;;\a", ((void *)0)); | |||
| 1314 | else | |||
| 1315 | n = strdup(text); | |||
| 1316 | if (!n) | |||
| 1317 | return -ENOMEM12; | |||
| 1318 | ||||
| 1319 | *ret = n; | |||
| 1320 | return 0; | |||
| 1321 | } | |||
| 1322 | ||||
| 1323 | int file_url_from_path(const char *path, char **ret) { | |||
| 1324 | _cleanup_free___attribute__((cleanup(freep))) char *absolute = NULL((void*)0); | |||
| 1325 | struct utsname u; | |||
| 1326 | char *url = NULL((void*)0); | |||
| 1327 | int r; | |||
| 1328 | ||||
| 1329 | if (uname(&u) < 0) | |||
| 1330 | return -errno(*__errno_location ()); | |||
| 1331 | ||||
| 1332 | if (!path_is_absolute(path)) { | |||
| 1333 | r = path_make_absolute_cwd(path, &absolute); | |||
| 1334 | if (r < 0) | |||
| 1335 | return r; | |||
| 1336 | ||||
| 1337 | path = absolute; | |||
| 1338 | } | |||
| 1339 | ||||
| 1340 | /* As suggested by https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda, let's include the local | |||
| 1341 | * hostname here. Note that we don't use gethostname_malloc() or gethostname_strict() since we are interested | |||
| 1342 | * in the raw string the kernel has set, whatever it may be, under the assumption that terminals are not overly | |||
| 1343 | * careful with validating the strings either. */ | |||
| 1344 | ||||
| 1345 | url = strjoin("file://", u.nodename, path)strjoin_real(("file://"), u.nodename, path, ((void*)0)); | |||
| 1346 | if (!url) | |||
| 1347 | return -ENOMEM12; | |||
| 1348 | ||||
| 1349 | *ret = url; | |||
| 1350 | return 0; | |||
| 1351 | } | |||
| 1352 | ||||
| 1353 | int terminal_urlify_path(const char *path, const char *text, char **ret) { | |||
| 1354 | _cleanup_free___attribute__((cleanup(freep))) char *url = NULL((void*)0); | |||
| 1355 | int r; | |||
| 1356 | ||||
| 1357 | assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm (LOG_REALM_SYSTEMD, ("path"), "../src/basic/terminal-util.c", 1357, __PRETTY_FUNCTION__); } while (0); | |||
| 1358 | ||||
| 1359 | /* Much like terminal_urlify() above, but takes a file system path as input | |||
| 1360 | * and turns it into a proper file:// URL first. */ | |||
| 1361 | ||||
| 1362 | if (isempty(path)) | |||
| 1363 | return -EINVAL22; | |||
| 1364 | ||||
| 1365 | if (isempty(text)) | |||
| 1366 | text = path; | |||
| 1367 | ||||
| 1368 | if (!urlify_enabled()) { | |||
| 1369 | char *n; | |||
| 1370 | ||||
| 1371 | n = strdup(text); | |||
| 1372 | if (!n) | |||
| 1373 | return -ENOMEM12; | |||
| 1374 | ||||
| 1375 | *ret = n; | |||
| 1376 | return 0; | |||
| 1377 | } | |||
| 1378 | ||||
| 1379 | r = file_url_from_path(path, &url); | |||
| 1380 | if (r < 0) | |||
| 1381 | return r; | |||
| 1382 | ||||
| 1383 | return terminal_urlify(url, text, ret); | |||
| 1384 | } | |||
| 1385 | ||||
| 1386 | ||||
| 1387 | static int cat_file(const char *filename, bool_Bool newline) { | |||
| 1388 | _cleanup_fclose___attribute__((cleanup(fclosep))) FILE *f = NULL((void*)0); | |||
| 1389 | _cleanup_free___attribute__((cleanup(freep))) char *urlified = NULL((void*)0); | |||
| 1390 | int r; | |||
| 1391 | ||||
| 1392 | f = fopen(filename, "re"); | |||
| 1393 | if (!f) | |||
| 1394 | return -errno(*__errno_location ()); | |||
| 1395 | ||||
| 1396 | r = terminal_urlify_path(filename, NULL((void*)0), &urlified); | |||
| 1397 | if (r < 0) | |||
| 1398 | return r; | |||
| 1399 | ||||
| 1400 | printf("%s%s# %s%s\n", | |||
| 1401 | newline ? "\n" : "", | |||
| 1402 | ansi_highlight_blue(), | |||
| 1403 | urlified, | |||
| 1404 | ansi_normal()); | |||
| 1405 | fflush(stdoutstdout); | |||
| 1406 | ||||
| 1407 | for (;;) { | |||
| 1408 | _cleanup_free___attribute__((cleanup(freep))) char *line = NULL((void*)0); | |||
| 1409 | ||||
| 1410 | r = read_line(f, LONG_LINE_MAX(1U*1024U*1024U), &line); | |||
| 1411 | if (r < 0) | |||
| 1412 | return log_error_errno(r, "Failed to read \"%s\": %m", filename)({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/terminal-util.c", 1412, __func__, "Failed to read \"%s\": %m" , filename) : -abs(_e); }); | |||
| 1413 | if (r == 0) | |||
| 1414 | break; | |||
| 1415 | ||||
| 1416 | puts(line); | |||
| 1417 | } | |||
| 1418 | ||||
| 1419 | return 0; | |||
| 1420 | } | |||
| 1421 | ||||
| 1422 | int cat_files(const char *file, char **dropins, CatFlags flags) { | |||
| 1423 | char **path; | |||
| 1424 | int r; | |||
| 1425 | ||||
| 1426 | if (file) { | |||
| 1427 | r = cat_file(file, false0); | |||
| 1428 | if (r == -ENOENT2 && (flags & CAT_FLAGS_MAIN_FILE_OPTIONAL)) | |||
| 1429 | printf("%s# config file %s not found%s\n", | |||
| 1430 | ansi_highlight_magenta(), | |||
| 1431 | file, | |||
| 1432 | ansi_normal()); | |||
| 1433 | else if (r < 0) | |||
| 1434 | return log_warning_errno(r, "Failed to cat %s: %m", file)({ int _level = ((4)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/terminal-util.c", 1434, __func__, "Failed to cat %s: %m" , file) : -abs(_e); }); | |||
| 1435 | } | |||
| 1436 | ||||
| 1437 | STRV_FOREACH(path, dropins)for ((path) = (dropins); (path) && *(path); (path)++) { | |||
| 1438 | r = cat_file(*path, file || path != dropins); | |||
| 1439 | if (r < 0) | |||
| 1440 | return log_warning_errno(r, "Failed to cat %s: %m", *path)({ int _level = ((4)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/basic/terminal-util.c", 1440, __func__, "Failed to cat %s: %m" , *path) : -abs(_e); }); | |||
| 1441 | } | |||
| 1442 | ||||
| 1443 | return 0; | |||
| 1444 | } | |||
| 1445 | ||||
| 1446 | void print_separator(void) { | |||
| 1447 | ||||
| 1448 | /* Outputs a separator line that resolves to whitespace when copied from the terminal. We do that by outputting | |||
| 1449 | * one line filled with spaces with ANSI underline set, followed by a second (empty) line. */ | |||
| 1450 | ||||
| 1451 | if (underline_enabled()) { | |||
| 1452 | size_t i, c; | |||
| 1453 | ||||
| 1454 | c = columns(); | |||
| 1455 | ||||
| 1456 | flockfile(stdoutstdout); | |||
| 1457 | fputs_unlocked(ANSI_UNDERLINE"\x1B[0;4m", stdoutstdout); | |||
| 1458 | ||||
| 1459 | for (i = 0; i < c; i++) | |||
| 1460 | fputc_unlocked(' ', stdoutstdout); | |||
| 1461 | ||||
| 1462 | fputs_unlocked(ANSI_NORMAL"\x1B[0m" "\n\n", stdoutstdout); | |||
| 1463 | funlockfile(stdoutstdout); | |||
| 1464 | } else | |||
| 1465 | fputs("\n\n", stdoutstdout); | |||
| 1466 | } |