udevadm-test.c revision 17fcfb5972977b6a3aedca6ad2aa8d1fbfbc761d
/*
* Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
* Copyright (C) 2004-2008 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 <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stddef.h>
#include <unistd.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <signal.h>
#include <syslog.h>
#include <getopt.h>
#include "udev.h"
#include "udev_rules.h"
static int import_uevent_var(struct udev *udev, const char *devpath)
{
char path[UTIL_PATH_SIZE];
static char value[4096]; /* must stay, used with putenv */
ssize_t size;
int fd;
char *key;
char *next;
int rc = -1;
/* read uevent file */
util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
util_strlcat(path, devpath, sizeof(path));
util_strlcat(path, "/uevent", sizeof(path));
fd = open(path, O_RDONLY);
if (fd < 0)
goto out;
size = read(fd, value, sizeof(value));
close(fd);
if (size < 0)
goto out;
value[size] = '\0';
/* import keys into environment */
key = value;
while (key[0] != '\0') {
next = strchr(key, '\n');
if (next == NULL)
goto out;
next[0] = '\0';
info(udev, "import into environment: '%s'\n", key);
putenv(key);
key = &next[1];
}
rc = 0;
out:
return rc;
}
int udevadm_test(struct udev *udev, int argc, char *argv[])
{
int force = 0;
const char *action = "add";
const char *subsystem = NULL;
const char *devpath = NULL;
struct udevice *udevice;
struct sysfs_device *dev;
struct udev_rules rules = {};
int retval;
int rc = 0;
static const struct option options[] = {
{ "action", 1, NULL, 'a' },
{ "subsystem", 1, NULL, 's' },
{ "force", 0, NULL, 'f' },
{ "help", 0, NULL, 'h' },
{}
};
info(udev, "version %s\n", VERSION);
/* export log priority to executed programs */
if (udev_get_log_priority(udev) > 0) {
char priority[32];
sprintf(priority, "%i", udev_get_log_priority(udev));
setenv("UDEV_LOG", priority, 1);
}
while (1) {
int option;
option = getopt_long(argc, argv, "a:s:fh", options, NULL);
if (option == -1)
break;
dbg(udev, "option '%c'\n", option);
switch (option) {
case 'a':
action = optarg;
break;
case 's':
subsystem = optarg;
break;
case 'f':
force = 1;
break;
case 'h':
printf("Usage: udevadm test OPTIONS <devpath>\n"
" --action=<string> set action string\n"
" --subsystem=<string> set subsystem string\n"
" --force don't skip node/link creation\n"
" --help print this help text\n\n");
exit(0);
default:
exit(1);
}
}
devpath = argv[optind];
if (devpath == NULL) {
fprintf(stderr, "devpath parameter missing\n");
rc = 1;
goto exit;
}
printf("This program is for debugging only, it does not run any program,\n"
"specified by a RUN key. It may show incorrect results, because\n"
"some values may be different, or not available at a simulation run.\n"
"\n");
udev_rules_init(udev, &rules, 0);
/* remove /sys if given */
if (strncmp(devpath, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) == 0)
devpath = &devpath[strlen(udev_get_sys_path(udev))];
dev = sysfs_device_get(udev, devpath);
if (dev == NULL) {
fprintf(stderr, "unable to open device '%s'\n", devpath);
rc = 2;
goto exit;
}
udevice = udev_device_init(udev);
if (udevice == NULL) {
fprintf(stderr, "error initializing device\n");
rc = 3;
goto exit;
}
if (subsystem != NULL)
util_strlcpy(dev->subsystem, subsystem, sizeof(dev->subsystem));
/* override built-in sysfs device */
udevice->dev = dev;
util_strlcpy(udevice->action, action, sizeof(udevice->action));
udevice->devt = udev_device_get_devt(udevice);
/* simulate node creation with test flag */
if (!force)
udevice->test_run = 1;
setenv("DEVPATH", udevice->dev->devpath, 1);
setenv("SUBSYSTEM", udevice->dev->subsystem, 1);
setenv("ACTION", udevice->action, 1);
import_uevent_var(udev, udevice->dev->devpath);
info(udev, "looking at device '%s' from subsystem '%s'\n", udevice->dev->devpath, udevice->dev->subsystem);
retval = udev_device_event(&rules, udevice);
if (udevice->event_timeout >= 0)
info(udev, "custom event timeout: %i\n", udevice->event_timeout);
if (retval == 0 && !udevice->ignore_device && udev_get_run(udev)) {
struct name_entry *name_loop;
list_for_each_entry(name_loop, &udevice->run_list, node) {
char program[UTIL_PATH_SIZE];
util_strlcpy(program, name_loop->name, sizeof(program));
udev_rules_apply_format(udevice, program, sizeof(program));
info(udev, "run: '%s'\n", program);
}
}
udev_device_cleanup(udevice);
exit:
udev_rules_cleanup(&rules);
return rc;
}