src/shared/udev-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <string.h>
   5
   6 #include "alloc-util.h"
   7 #include "fileio.h"
   8 #include "log.h"
   9 #include "string-util.h"
  10 #include "udev-util.h"
  11
  12 int udev_parse_config(void) {
  13         _cleanup_free_ char *val = NULL;
  14         const char *log;
  15         size_t n;
  16         int r;
  17
  18         r = parse_env_file(NULL, "/etc/udev/udev.conf", NEWLINE, "udev_log", &val, NULL);
  19         if (r == -ENOENT || !val)
  20                 return 0;
  21         if (r < 0)
  22                 return r;
  23
  24         /* unquote */
  25         n = strlen(val);
  26         if (n >= 2 &&
  27             ((val[0] == '"' && val[n-1] == '"') ||
  28              (val[0] == '\'' && val[n-1] == '\''))) {
  29                 val[n - 1] = '\0';
  30                 log = val + 1;
  31         } else
  32                 log = val;
  33
  34         /* we set the udev log level here explicitly, this is supposed
  35          * to regulate the code in libudev/ and udev/. */
  36         r = log_set_max_level_from_string_realm(LOG_REALM_UDEV, log);
  37         if (r < 0)
  38                 log_debug_errno(r, "/etc/udev/udev.conf: failed to set udev log level '%s', ignoring: %m", log);
  39
  40         return 0;
  41 }