LCOV - code coverage report
Current view: top level - journal - journald-console.c (source / functions) Hit Total Coverage
Test: systemd_full.info Lines: 0 39 0.0 %
Date: 2019-08-23 13:36:53 Functions: 0 2 0.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 0 42 0.0 %

           Branch data     Line data    Source code
       1                 :            : /* SPDX-License-Identifier: LGPL-2.1+ */
       2                 :            : 
       3                 :            : #include <fcntl.h>
       4                 :            : #include <sys/socket.h>
       5                 :            : #include <time.h>
       6                 :            : 
       7                 :            : #include "alloc-util.h"
       8                 :            : #include "fd-util.h"
       9                 :            : #include "fileio.h"
      10                 :            : #include "format-util.h"
      11                 :            : #include "io-util.h"
      12                 :            : #include "journald-console.h"
      13                 :            : #include "journald-server.h"
      14                 :            : #include "parse-util.h"
      15                 :            : #include "process-util.h"
      16                 :            : #include "stdio-util.h"
      17                 :            : #include "terminal-util.h"
      18                 :            : 
      19                 :          0 : static bool prefix_timestamp(void) {
      20                 :            : 
      21                 :            :         static int cached_printk_time = -1;
      22                 :            : 
      23         [ #  # ]:          0 :         if (_unlikely_(cached_printk_time < 0)) {
      24                 :          0 :                 _cleanup_free_ char *p = NULL;
      25                 :            : 
      26                 :          0 :                 cached_printk_time =
      27                 :          0 :                         read_one_line_file("/sys/module/printk/parameters/time", &p) >= 0
      28   [ #  #  #  # ]:          0 :                         && parse_boolean(p) > 0;
      29                 :            :         }
      30                 :            : 
      31                 :          0 :         return cached_printk_time;
      32                 :            : }
      33                 :            : 
      34                 :          0 : void server_forward_console(
      35                 :            :                 Server *s,
      36                 :            :                 int priority,
      37                 :            :                 const char *identifier,
      38                 :            :                 const char *message,
      39                 :            :                 const struct ucred *ucred) {
      40                 :            : 
      41                 :            :         struct iovec iovec[5];
      42                 :            :         struct timespec ts;
      43                 :            :         char tbuf[STRLEN("[] ") + DECIMAL_STR_MAX(ts.tv_sec) + DECIMAL_STR_MAX(ts.tv_nsec)-3 + 1];
      44                 :            :         char header_pid[STRLEN("[]: ") + DECIMAL_STR_MAX(pid_t)];
      45         [ #  # ]:          0 :         _cleanup_free_ char *ident_buf = NULL;
      46         [ #  # ]:          0 :         _cleanup_close_ int fd = -1;
      47                 :            :         const char *tty;
      48                 :          0 :         int n = 0;
      49                 :            : 
      50         [ #  # ]:          0 :         assert(s);
      51         [ #  # ]:          0 :         assert(message);
      52                 :            : 
      53         [ #  # ]:          0 :         if (LOG_PRI(priority) > s->max_level_console)
      54                 :          0 :                 return;
      55                 :            : 
      56                 :            :         /* First: timestamp */
      57         [ #  # ]:          0 :         if (prefix_timestamp()) {
      58         [ #  # ]:          0 :                 assert_se(clock_gettime(CLOCK_MONOTONIC, &ts) == 0);
      59         [ #  # ]:          0 :                 xsprintf(tbuf, "[%5"PRI_TIME".%06"PRI_NSEC"] ",
      60                 :            :                          ts.tv_sec,
      61                 :            :                          (nsec_t)ts.tv_nsec / 1000);
      62                 :            : 
      63                 :          0 :                 iovec[n++] = IOVEC_MAKE_STRING(tbuf);
      64                 :            :         }
      65                 :            : 
      66                 :            :         /* Second: identifier and PID */
      67         [ #  # ]:          0 :         if (ucred) {
      68         [ #  # ]:          0 :                 if (!identifier) {
      69                 :          0 :                         get_process_comm(ucred->pid, &ident_buf);
      70                 :          0 :                         identifier = ident_buf;
      71                 :            :                 }
      72                 :            : 
      73         [ #  # ]:          0 :                 xsprintf(header_pid, "["PID_FMT"]: ", ucred->pid);
      74                 :            : 
      75         [ #  # ]:          0 :                 if (identifier)
      76                 :          0 :                         iovec[n++] = IOVEC_MAKE_STRING(identifier);
      77                 :            : 
      78                 :          0 :                 iovec[n++] = IOVEC_MAKE_STRING(header_pid);
      79         [ #  # ]:          0 :         } else if (identifier) {
      80                 :          0 :                 iovec[n++] = IOVEC_MAKE_STRING(identifier);
      81                 :          0 :                 iovec[n++] = IOVEC_MAKE_STRING(": ");
      82                 :            :         }
      83                 :            : 
      84                 :            :         /* Fourth: message */
      85                 :          0 :         iovec[n++] = IOVEC_MAKE_STRING(message);
      86                 :          0 :         iovec[n++] = IOVEC_MAKE_STRING("\n");
      87                 :            : 
      88         [ #  # ]:          0 :         tty = s->tty_path ?: "/dev/console";
      89                 :            : 
      90                 :            :         /* Before you ask: yes, on purpose we open/close the console for each log line we write individually. This is a
      91                 :            :          * good strategy to avoid journald getting killed by the kernel's SAK concept (it doesn't fix this entirely,
      92                 :            :          * but minimizes the time window the kernel might end up killing journald due to SAK). It also makes things
      93                 :            :          * easier for us so that we don't have to recover from hangups and suchlike triggered on the console. */
      94                 :            : 
      95                 :          0 :         fd = open_terminal(tty, O_WRONLY|O_NOCTTY|O_CLOEXEC);
      96         [ #  # ]:          0 :         if (fd < 0) {
      97         [ #  # ]:          0 :                 log_debug_errno(fd, "Failed to open %s for logging: %m", tty);
      98                 :          0 :                 return;
      99                 :            :         }
     100                 :            : 
     101         [ #  # ]:          0 :         if (writev(fd, iovec, n) < 0)
     102         [ #  # ]:          0 :                 log_debug_errno(errno, "Failed to write to %s for logging: %m", tty);
     103                 :            : }

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