152 lines
3.9 KiB
C
152 lines
3.9 KiB
C
/*
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* udevcontrol.c
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*
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* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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#include <sys/un.h>
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#include <time.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#include <unistd.h>
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#include <linux/stddef.h>
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#include "udev.h"
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#include "udev_version.h"
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#include "udevd.h"
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#include "udev_utils.h"
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#include "logging.h"
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/* global variables */
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static int sock = -1;
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static int log = 0;
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#ifdef USE_LOG
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void log_message (int priority, const char *format, ...)
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{
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va_list args;
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if (priority > log)
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return;
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va_start(args, format);
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vsyslog(priority, format, args);
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va_end(args);
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}
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#endif
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int main(int argc, char *argv[], char *envp[])
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{
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static struct udevd_msg usend_msg;
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struct sockaddr_un saddr;
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socklen_t addrlen;
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const char *env;
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const char *val;
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int *intval;
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int i;
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int retval = 1;
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env = getenv("UDEV_LOG");
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if (env)
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log = log_priority(env);
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logging_init("udevcontrol");
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dbg("version %s", UDEV_VERSION);
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if (argc < 2) {
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fprintf(stderr, "missing command\n\n");
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goto exit;
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}
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memset(&usend_msg, 0x00, sizeof(struct udevd_msg));
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strcpy(usend_msg.magic, UDEV_MAGIC);
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for (i = 1 ; i < argc; i++) {
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char *arg = argv[i];
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if (!strcmp(arg, "stop_exec_queue"))
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usend_msg.type = UDEVD_STOP_EXEC_QUEUE;
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else if (!strcmp(arg, "start_exec_queue"))
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usend_msg.type = UDEVD_START_EXEC_QUEUE;
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else if (!strncmp(arg, "log_priority=", strlen("log_priority="))) {
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intval = (int *) usend_msg.envbuf;
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val = &arg[strlen("log_priority=")];
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usend_msg.type = UDEVD_SET_LOG_LEVEL;
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*intval = log_priority(val);
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info("send log_priority=%i", *intval);
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} else if (!strncmp(arg, "max_childs=", strlen("max_childs="))) {
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intval = (int *) usend_msg.envbuf;
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val = &arg[strlen("max_childs=")];
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usend_msg.type = UDEVD_SET_MAX_CHILDS;
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*intval = atoi(val);
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info("send max_childs=%i", *intval);
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} else if (strcmp(arg, "help") == 0 || strcmp(arg, "--help") == 0 || strcmp(arg, "-h") == 0) {
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printf("Usage: udevcontrol COMMAND\n"
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" log_priority=<level> set the udev log level for the daemon\n"
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" stop_exec_queue keep udevd from executing events, queue only\n"
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" start_exec_queue execute events, flush queue\n"
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" max_childs=<N> maximum number of childs running at the same time\n"
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" --help print this help text\n\n");
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exit(0);
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} else {
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fprintf(stderr, "unknown option\n\n");
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exit(1);
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}
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}
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if (getuid() != 0) {
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fprintf(stderr, "need to be root, exit\n\n");
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exit(1);
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}
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sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
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if (sock == -1) {
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err("error getting socket");
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goto exit;
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}
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memset(&saddr, 0x00, sizeof(struct sockaddr_un));
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saddr.sun_family = AF_LOCAL;
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/* use abstract namespace for socket path */
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strcpy(&saddr.sun_path[1], UDEVD_SOCK_PATH);
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addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
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retval = sendto(sock, &usend_msg, sizeof(usend_msg), 0, (struct sockaddr *)&saddr, addrlen);
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if (retval == -1) {
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info("error sending message (%s)", strerror(errno));
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retval = 1;
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} else {
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dbg("sent message type=0x%02x, %u bytes sent", usend_msg.type, retval);
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retval = 0;
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}
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close(sock);
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exit:
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logging_close();
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return retval;
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}
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