diff options
Diffstat (limited to 'udev/test-udev.c')
| -rw-r--r-- | udev/test-udev.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/udev/test-udev.c b/udev/test-udev.c new file mode 100644 index 0000000000..4ac2d5a889 --- /dev/null +++ b/udev/test-udev.c @@ -0,0 +1,175 @@ +/* + * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com> + * Copyright (C) 2004-2006 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 version 2 of the License. + * + * 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, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#include <stdio.h> +#include <stddef.h> +#include <stdlib.h> +#include <string.h> +#include <fcntl.h> +#include <ctype.h> +#include <errno.h> +#include <signal.h> +#include <unistd.h> +#include <syslog.h> + +#include "udev.h" +#include "udev_rules.h" +#include "udev_selinux.h" + +#ifdef USE_LOG +void log_message(int priority, const char *format, ...) +{ + va_list args; + + if (priority > udev_log_priority) + return; + + va_start(args, format); + vsyslog(priority, format, args); + va_end(args); +} +#endif + +static void asmlinkage sig_handler(int signum) +{ + switch (signum) { + case SIGALRM: + exit(1); + case SIGINT: + case SIGTERM: + exit(20 + signum); + } +} + +int main(int argc, char *argv[], char *envp[]) +{ + struct sysfs_device *dev; + struct udevice *udev; + const char *maj, *min; + struct udev_rules rules; + const char *action; + const char *devpath; + const char *subsystem; + struct sigaction act; + int devnull; + int retval = -EINVAL; + + if (argc == 2 && strcmp(argv[1], "-V") == 0) { + printf("%s\n", UDEV_VERSION); + exit(0); + } + + /* set std fd's to /dev/null, /sbin/hotplug forks us, we don't have them at all */ + devnull = open("/dev/null", O_RDWR); + if (devnull >= 0) { + if (devnull != STDIN_FILENO) + dup2(devnull, STDIN_FILENO); + if (devnull != STDOUT_FILENO) + dup2(devnull, STDOUT_FILENO); + if (devnull != STDERR_FILENO) + dup2(devnull, STDERR_FILENO); + if (devnull > STDERR_FILENO) + close(devnull); + } + + logging_init("udev"); + if (devnull < 0) + err("open /dev/null failed: %s\n", strerror(errno)); + udev_config_init(); + selinux_init(); + dbg("version %s\n", UDEV_VERSION); + + /* set signal handlers */ + memset(&act, 0x00, sizeof(act)); + act.sa_handler = (void (*)(int)) sig_handler; + sigemptyset (&act.sa_mask); + act.sa_flags = 0; + sigaction(SIGALRM, &act, NULL); + sigaction(SIGINT, &act, NULL); + sigaction(SIGTERM, &act, NULL); + + /* trigger timeout to prevent hanging processes */ + alarm(UDEV_EVENT_TIMEOUT); + + action = getenv("ACTION"); + devpath = getenv("DEVPATH"); + subsystem = getenv("SUBSYSTEM"); + /* older kernels passed the SUBSYSTEM only as argument */ + if (subsystem == NULL && argc == 2) + subsystem = argv[1]; + + if (action == NULL || subsystem == NULL || devpath == NULL) { + err("action, subsystem or devpath missing\n"); + goto exit; + } + + /* export log_priority , as called programs may want to do the same as udev */ + if (udev_log_priority) { + char priority[32]; + + sprintf(priority, "%i", udev_log_priority); + setenv("UDEV_LOG", priority, 1); + } + + sysfs_init(); + udev_rules_init(&rules, 0); + + dev = sysfs_device_get(devpath); + if (dev == NULL) { + info("unable to open '%s'\n", devpath); + goto fail; + } + + udev = udev_device_init(NULL); + if (udev == NULL) + goto fail; + + /* override built-in sysfs device */ + udev->dev = dev; + strlcpy(udev->action, action, sizeof(udev->action)); + + /* get dev_t from environment, which is needed for "remove" to work, "add" works also from sysfs */ + maj = getenv("MAJOR"); + min = getenv("MINOR"); + if (maj != NULL && min != NULL) + udev->devt = makedev(atoi(maj), atoi(min)); + else + udev->devt = udev_device_get_devt(udev); + + retval = udev_device_event(&rules, udev); + + /* rules may change/disable the timeout */ + if (udev->event_timeout >= 0) + alarm(udev->event_timeout); + + if (retval == 0 && !udev->ignore_device && udev_run) + udev_rules_run(udev); + + udev_device_cleanup(udev); +fail: + udev_rules_cleanup(&rules); + sysfs_cleanup(); + selinux_exit(); + +exit: + logging_close(); + if (retval != 0) + return 1; + return 0; +} |