udevcontrol.c

   1 /*
   2  * udevcontrol.c
   3  *
   4  * Userspace devfs
   5  *
   6  * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
   7  *
   8  *
   9  *      This program is free software; you can redistribute it and/or modify it
  10  *      under the terms of the GNU General Public License as published by the
  11  *      Free Software Foundation version 2 of the License.
  12  *
  13  *      This program is distributed in the hope that it will be useful, but
  14  *      WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  *      General Public License for more details.
  17  *
  18  *      You should have received a copy of the GNU General Public License along
  19  *      with this program; if not, write to the Free Software Foundation, Inc.,
  20  *      675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  */
  23
  24 #include <sys/types.h>
  25 #include <sys/socket.h>
  26 #include <sys/wait.h>
  27 #include <sys/un.h>
  28 #include <time.h>
  29 #include <errno.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <stddef.h>
  33 #include <string.h>
  34 #include <unistd.h>
  35 #include <linux/stddef.h>
  36
  37 #include "udev.h"
  38 #include "udev_version.h"
  39 #include "udevd.h"
  40 #include "logging.h"
  41
  42 /* global variables */
  43 static int sock = -1;
  44
  45 #ifdef USE_LOG
  46 void log_message (int level, const char *format, ...)
  47 {
  48         va_list args;
  49
  50         va_start(args, format);
  51         vsyslog(level, format, args);
  52         va_end(args);
  53 }
  54 #endif
  55
  56
  57 int main(int argc, char *argv[], char *envp[])
  58 {
  59         static struct udevd_msg usend_msg;
  60         struct sockaddr_un saddr;
  61         socklen_t addrlen;
  62         int retval = 1;
  63
  64         logging_init("udevcontrol");
  65         dbg("version %s", UDEV_VERSION);
  66
  67         if (argc != 2) {
  68                 info("usage: udevcontrol <cmd>\n");
  69                 goto exit;
  70         }
  71
  72         memset(&usend_msg, 0x00, sizeof(struct udevd_msg));
  73         strcpy(usend_msg.magic, UDEV_MAGIC);
  74
  75         if (strstr(argv[1], "stop_exec_queue"))
  76                 usend_msg.type = UDEVD_STOP_EXEC_QUEUE;
  77         else if (strstr(argv[1], "start_exec_queue"))
  78                 usend_msg.type = UDEVD_START_EXEC_QUEUE;
  79         else {
  80                 info("unknown command\n");
  81                 goto exit;
  82         }
  83
  84         sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
  85         if (sock == -1) {
  86                 info("error getting socket");
  87                 goto exit;
  88         }
  89
  90         memset(&saddr, 0x00, sizeof(struct sockaddr_un));
  91         saddr.sun_family = AF_LOCAL;
  92         /* use abstract namespace for socket path */
  93         strcpy(&saddr.sun_path[1], UDEVD_SOCK_PATH);
  94         addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
  95
  96
  97         retval = sendto(sock, &usend_msg, sizeof(usend_msg), 0, (struct sockaddr *)&saddr, addrlen);
  98         if (retval == -1)
  99                 info("error sending message (%s)", strerror(errno));
 100
 101         close(sock);
 102
 103 exit:
 104         logging_close();
 105
 106         return retval;
 107 }