udevadm.c revision e598c5738c2dc85a3e93c3f68cd88e8eea51215b
/*
* Copyright (C) 2007-2008 Kay Sievers <kay.sievers@vrfy.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include "udev.h"
static int debug;
static void log_fn(struct udev *udev, int priority,
const char *file, int line, const char *fn,
const char *format, va_list args)
{
if (debug) {
fprintf(stderr, "%s: ", fn);
vfprintf(stderr, format, args);
} else {
vsyslog(priority, format, args);
}
}
struct command {
const char *name;
int (*cmd)(struct udev *udev, int argc, char *argv[]);
const char *help;
int debug;
};
static const struct command cmds[];
static int version(struct udev *udev, int argc, char *argv[])
{
printf("%s\n", VERSION);
return 0;
}
static int help(struct udev *udev, int argc, char *argv[])
{
const struct command *cmd;
printf("Usage: udevadm [--help] [--version] [--debug] COMMAND [COMMAND OPTIONS]\n");
for (cmd = cmds; cmd->name != NULL; cmd++)
if (cmd->help != NULL)
printf(" %-12s %s\n", cmd->name, cmd->help);
printf("\n");
return 0;
}
static const struct command cmds[] = {
{
.name = "info",
.cmd = udevadm_info,
.help = "query sysfs or the udev database",
},
{
.name = "trigger",
.cmd = udevadm_trigger,
.help = "request events from the kernel",
},
{
.name = "settle",
.cmd = udevadm_settle, "",
.help = "wait for the event queue to finish",
},
{
.name = "control",
.cmd = udevadm_control,
.help = "control the udev daemon",
},
{
.name = "monitor",
.cmd = udevadm_monitor,
.help = "listen to kernel and udev events",
},
{
.name = "test",
.cmd = udevadm_test,
.help = "simulation run",
.debug = 1,
},
{
.name = "version",
.cmd = version,
},
{
.name = "help",
.cmd = help,
},
{}
};
static int run_command(struct udev *udev, const struct command *cmd, int argc, char *argv[])
{
if (cmd->debug) {
debug = 1;
if (udev_get_log_priority(udev) < LOG_INFO)
udev_set_log_priority(udev, LOG_INFO);
}
info(udev, "calling: %s\n", cmd->name);
return cmd->cmd(udev, argc, argv);
}
int main(int argc, char *argv[])
{
struct udev *udev;
static const struct option options[] = {
{ "debug", no_argument, NULL, 'd' },
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
{}
};
const char *command;
int i;
const char *pos;
int rc = 1;
udev = udev_new();
if (udev == NULL)
goto out;
logging_init("udevadm");
udev_set_log_fn(udev, log_fn);
selinux_init(udev);
sysfs_init();
/* see if we are a compat link, this will be removed in a future release */
command = argv[0];
pos = strrchr(command, '/');
if (pos != NULL)
command = &pos[1];
/* the trailing part of the binary or link name is the command */
if (strncmp(command, "udev", 4) == 0)
command = &command[4];
for (i = 0; cmds[i].cmd != NULL; i++) {
if (strcmp(cmds[i].name, command) == 0) {
char path[128];
char prog[512];
ssize_t len;
snprintf(path, sizeof(path), "/proc/%lu/exe", (unsigned long) getppid());
len = readlink(path, prog, sizeof(prog));
if (len > 0) {
prog[len] = '\0';
fprintf(stderr, "the program '%s' called '%s', it should use 'udevadm %s <options>', "
"this will stop working in a future release\n", prog, argv[0], command);
err(udev, "the program '%s' called '%s', it should use 'udevadm %s <options>', "
"this will stop working in a future release\n", prog, argv[0], command);
}
rc = run_command(udev, &cmds[i], argc, argv);
goto out;
}
}
while (1) {
int option;
option = getopt_long(argc, argv, "+dhV", options, NULL);
if (option == -1)
break;
switch (option) {
case 'd':
debug = 1;
if (udev_get_log_priority(udev) < LOG_INFO)
udev_set_log_priority(udev, LOG_INFO);
break;
case 'h':
rc = help(udev, argc, argv);
goto out;
case 'V':
rc = version(udev, argc, argv);
goto out;
default:
goto out;
}
}
command = argv[optind];
if (command != NULL)
for (i = 0; cmds[i].cmd != NULL; i++) {
if (strcmp(cmds[i].name, command) == 0) {
optind++;
rc = run_command(udev, &cmds[i], argc, argv);
goto out;
}
}
fprintf(stderr, "missing or unknown command\n\n");
help(udev, argc, argv);
rc = 2;
out:
sysfs_cleanup();
selinux_exit(udev);
udev_unref(udev);
logging_close();
return rc;
}