extras/run_directory/udev_run_devd.c

   1 /*
   2  * udev_run_devd.c - directory multiplexer
   3  *
   4  * Copyright (C) 2005 Kay Sievers <kay@vrfy.org>
   5  *
   6  *      This program is free software; you can redistribute it and/or modify it
   7  *      under the terms of the GNU General Public License as published by the
   8  *      Free Software Foundation version 2 of the License.
   9  *
  10  */
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <stddef.h>
  16 #include <dirent.h>
  17 #include <errno.h>
  18 #include <unistd.h>
  19 #include <fcntl.h>
  20 #include <limits.h>
  21 #include <sys/types.h>
  22 #include <sys/wait.h>
  23 #include <sys/stat.h>
  24
  25 #include "../../udev.h"
  26 #include "run_directory.h"
  27
  28
  29 #ifdef USE_LOG
  30 void log_message (int priority, const char *format, ...)
  31 {
  32         va_list args;
  33         static int udev_log = -1;
  34
  35         if (udev_log == -1) {
  36                 const char *value;
  37
  38                 value = getenv("UDEV_LOG");
  39                 if (value)
  40                         udev_log = log_priority(value);
  41                 else
  42                         udev_log = LOG_ERR;
  43         }
  44
  45         if (priority > udev_log)
  46                 return;
  47
  48         va_start(args, format);
  49         vsyslog(priority, format, args);
  50         va_end(args);
  51 }
  52 #endif
  53
  54 int main(int argc, char *argv[], char *envp[])
  55 {
  56         char dirname[NAME_SIZE];
  57         const char *devname;
  58         const char *my_devname;
  59         const char *subsystem;
  60         int fd;
  61
  62         devname = getenv("DEVNAME");
  63         if (devname == NULL)
  64                 exit(0);
  65         /*
  66          * Hack, we are assuming that the device nodes are in /dev,
  67          * if not, this will not work, but you should be using the
  68          * RUN= rule anyway...
  69          */
  70         my_devname = strstr(devname, "/dev/");
  71         if (my_devname != NULL)
  72                 my_devname = &my_devname[5];
  73         else
  74                 my_devname = devname;
  75
  76         subsystem = argv[1];
  77         logging_init("udev_run_devd");
  78
  79         fd = open("/dev/null", O_RDWR);
  80         if (fd >= 0) {
  81                 dup2(fd, STDOUT_FILENO);
  82                 dup2(fd, STDIN_FILENO);
  83                 dup2(fd, STDERR_FILENO);
  84                 close(fd);
  85         }
  86         dbg("running dev.d directory");
  87
  88         sprintf(dirname, "/etc/dev.d/%s", my_devname);
  89         run_directory(dirname, ".dev", subsystem);
  90         sprintf(dirname, "/etc/dev.d/%s", subsystem);
  91         run_directory(dirname, ".dev", subsystem);
  92         run_directory("/etc/dev.d/default", ".dev", subsystem);
  93
  94         exit(0);
  95 }