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 "parse-util.h"
  10 #include "string-util.h"
  11 #include "udev-util.h"
  12 #include "udev.h"
  13
  14 int udev_parse_config_full(
  15                 unsigned *ret_children_max,
  16                 usec_t *ret_exec_delay_usec,
  17                 usec_t *ret_event_timeout_usec) {
  18
  19         _cleanup_free_ char *log_val = NULL, *children_max = NULL, *exec_delay = NULL, *event_timeout = NULL;
  20         int r;
  21
  22         r = parse_env_file(NULL, "/etc/udev/udev.conf", NEWLINE,
  23                            "udev_log", &log_val,
  24                            "children_max", &children_max,
  25                            "exec_delay", &exec_delay,
  26                            "event_timeout", &event_timeout,
  27                            NULL);
  28         if (r == -ENOENT)
  29                 return 0;
  30         if (r < 0)
  31                 return r;
  32
  33         if (log_val) {
  34                 const char *log;
  35                 size_t n;
  36
  37                 /* unquote */
  38                 n = strlen(log_val);
  39                 if (n >= 2 &&
  40                     ((log_val[0] == '"' && log_val[n-1] == '"') ||
  41                      (log_val[0] == '\'' && log_val[n-1] == '\''))) {
  42                         log_val[n - 1] = '\0';
  43                         log = log_val + 1;
  44                 } else
  45                         log = log_val;
  46
  47                 /* we set the udev log level here explicitly, this is supposed
  48                  * to regulate the code in libudev/ and udev/. */
  49                 r = log_set_max_level_from_string_realm(LOG_REALM_UDEV, log);
  50                 if (r < 0)
  51                         log_debug_errno(r, "/etc/udev/udev.conf: failed to set udev log level '%s', ignoring: %m", log);
  52         }
  53
  54         if (ret_children_max && children_max) {
  55                 r = safe_atou(children_max, ret_children_max);
  56                 if (r < 0)
  57                         log_notice_errno(r, "/etc/udev/udev.conf: failed to set parse children_max=%s, ignoring: %m", children_max);
  58         }
  59
  60         if (ret_exec_delay_usec && exec_delay) {
  61                 r = parse_sec(exec_delay, ret_exec_delay_usec);
  62                 if (r < 0)
  63                         log_notice_errno(r, "/etc/udev/udev.conf: failed to set parse exec_delay=%s, ignoring: %m", exec_delay);
  64         }
  65
  66         if (ret_event_timeout_usec && event_timeout) {
  67                 r = parse_sec(event_timeout, ret_event_timeout_usec);
  68                 if (r < 0)
  69                         log_notice_errno(r, "/etc/udev/udev.conf: failed to set parse event_timeout=%s, ignoring: %m", event_timeout);
  70         }
  71
  72         return 0;
  73 }