Branch data     Line data    Source code

       1                 :            : /* SPDX-License-Identifier: LGPL-2.1+ */
       2                 :            : 
       3                 :            : #include <sys/stat.h>
       4                 :            : #include <sys/types.h>
       5                 :            : #include <unistd.h>
       6                 :            : 
       7                 :            : #include "alloc-util.h"
       8                 :            : #include "fileio-label.h"
       9                 :            : #include "selinux-util.h"
      10                 :            : #include "time-util.h"
      11                 :            : 
      12                 :            : #define MESSAGE                                                         \
      13                 :            :         "# This file was created by systemd-update-done. Its only \n"   \
      14                 :            :         "# purpose is to hold a timestamp of the time this directory\n" \
      15                 :            :         "# was updated. See man:systemd-update-done.service(8).\n"
      16                 :            : 
      17                 :          0 : static int apply_timestamp(const char *path, struct timespec *ts) {
      18                 :          0 :         _cleanup_free_ char *message = NULL;
      19                 :            :         int r;
      20                 :            : 
      21                 :            :         /*
      22                 :            :          * We store the timestamp both as mtime of the file and in the file itself,
      23                 :            :          * to support filesystems which cannot store nanosecond-precision timestamps.
      24                 :            :          */
      25                 :            : 
      26         [ #  # ]:          0 :         if (asprintf(&message,
      27                 :            :                      MESSAGE
      28                 :            :                      "TIMESTAMP_NSEC=" NSEC_FMT "\n",
      29                 :            :                      timespec_load_nsec(ts)) < 0)
      30                 :          0 :                 return log_oom();
      31                 :            : 
      32                 :          0 :         r = write_string_file_atomic_label_ts(path, message, ts);
      33         [ #  # ]:          0 :         if (r == -EROFS)
      34         [ #  # ]:          0 :                 return log_debug("Cannot create \"%s\", file system is read-only.", path);
      35         [ #  # ]:          0 :         if (r < 0)
      36         [ #  # ]:          0 :                 return log_error_errno(r, "Failed to write \"%s\": %m", path);
      37                 :          0 :         return 0;
      38                 :            : }
      39                 :            : 
      40                 :          0 : int main(int argc, char *argv[]) {
      41                 :            :         struct stat st;
      42                 :          0 :         int r, q = 0;
      43                 :            : 
      44                 :          0 :         log_setup_service();
      45                 :            : 
      46         [ #  # ]:          0 :         if (stat("/usr", &st) < 0) {
      47         [ #  # ]:          0 :                 log_error_errno(errno, "Failed to stat /usr: %m");
      48                 :          0 :                 return EXIT_FAILURE;
      49                 :            :         }
      50                 :            : 
      51                 :          0 :         r = mac_selinux_init();
      52         [ #  # ]:          0 :         if (r < 0) {
      53         [ #  # ]:          0 :                 log_error_errno(r, "SELinux setup failed: %m");
      54                 :          0 :                 return EXIT_FAILURE;
      55                 :            :         }
      56                 :            : 
      57                 :          0 :         r = apply_timestamp("/etc/.updated", &st.st_mtim);
      58                 :          0 :         q = apply_timestamp("/var/.updated", &st.st_mtim);
      59                 :            : 
      60   [ #  #  #  # ]:          0 :         return r < 0 || q < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
      61                 :            : }