#ifdef LOG
-unsigned char logname[LOGNAME_SIZE];
void log_message(int level, const char *format, ...)
{
va_list args;
}
#endif
-/* (for now) true if udevsend is the helper */
+/* decide if we should manage the whole hotplug event
+ * for now look if the kernel calls udevsend instead of /sbin/hotplug
+ */
static int manage_hotplug_event(void) {
char helper[256];
int fd;
int len;
- /* false, if we are called directly */
- if (!getenv("MANAGED_EVENT"))
- goto exit;
+ /* don't handle hotplug.d if we are called directly */
+ if (!getenv("UDEVD_EVENT"))
+ return 0;
fd = open("/proc/sys/kernel/hotplug", O_RDONLY);
if (fd < 0)
- goto exit;
+ return 0;
len = read(fd, helper, 256);
close(fd);
if (len < 0)
- goto exit;
+ return 0;
helper[len] = '\0';
if (strstr(helper, "udevsend"))
return 1;
-exit:
return 0;
}
int main(int argc, char *argv[], char *envp[])
{
- struct sigaction act;
struct sysfs_class_device *class_dev;
struct sysfs_device *devices_dev;
struct udevice udev;
char path[SYSFS_PATH_MAX];
- int retval = -EINVAL;
const char *error;
- const char *action = getenv("ACTION");
- const char *devpath = getenv("DEVPATH");
- const char *subsystem = argv[1];
+ const char *action;
+ const char *devpath;
+ const char *subsystem;
+ int managed_event;
+ struct sigaction act;
+ int retval = -EINVAL;
+
+ if (argc == 2 && strcmp(argv[1], "-V") == 0) {
+ printf("%s\n", UDEV_VERSION);
+ exit(0);
+ }
- dbg("version %s", UDEV_VERSION);
logging_init("udev");
+ dbg("version %s", UDEV_VERSION);
+
udev_init_config();
/* set signal handlers */
+ memset(&act, 0x00, sizeof(act));
act.sa_handler = (void (*) (int))sig_handler;
sigemptyset (&act.sa_mask);
act.sa_flags = 0;
/* trigger timeout to prevent hanging processes */
alarm(ALARM_TIMEOUT);
- action = getenv("ACTION");
- devpath = getenv("DEVPATH");
- subsystem = getenv("SUBSYSTEM");
- /* older kernels passed the SUBSYSTEM only as argument */
- if (!subsystem && argc == 2)
- subsystem = argv[1];
- udev_init_device(&udev, devpath, subsystem);
-
if (strstr(argv[0], "udevstart") || (argc == 2 && strstr(argv[1], "udevstart"))) {
dbg("udevstart");
goto exit;
}
- if (!action) {
- dbg("no action");
- goto hotplug;
- }
+ /* let the executed programs know if we handle the whole hotplug event */
+ managed_event = manage_hotplug_event();
+ if (managed_event)
+ setenv("MANAGED_EVENT", "1", 1);
- if (!subsystem) {
- dbg("no subsystem");
- goto hotplug;
- }
+ action = getenv("ACTION");
+ devpath = getenv("DEVPATH");
+ subsystem = getenv("SUBSYSTEM");
+ /* older kernels passed the SUBSYSTEM only as argument */
+ if (!subsystem && argc == 2)
+ subsystem = argv[1];
+
+ udev_init_device(&udev, devpath, subsystem);
- if (!devpath) {
- dbg("no devpath");
+ if (!action || !subsystem || !devpath) {
+ dbg("action, subsystem or devpath missing");
goto hotplug;
}
if (udev_log)
setenv("UDEV_LOG", "1", 1);
- if ((strncmp(devpath, "/block/", 7) == 0) || (strncmp(devpath, "/class/", 7) == 0)) {
+ if (udev.type == BLOCK || udev.type == CLASS || udev.type == NET) {
if (strcmp(action, "add") == 0) {
/* wait for sysfs and possibly add node */
dbg("udev add");
/* skip subsystems without "dev", but handle net devices */
- if (udev.type != 'n' && subsystem_expect_no_dev(udev.subsystem)) {
+ if (udev.type != NET && subsystem_expect_no_dev(udev.subsystem)) {
dbg("don't care about '%s' devices", udev.subsystem);
goto hotplug;
}
wait_for_class_device(class_dev, &error);
- /* init rules, permissions */
+ /* init rules */
namedev_init();
/* name, create node, store in db */
}
/* run dev.d/ scripts if we created/deleted a node or changed a netif name */
- if (udev_dev_d && udev.devname[0] != '\0') {
+ if (udev.devname[0] != '\0') {
setenv("DEVNAME", udev.devname, 1);
- udev_multiplex_directory(&udev, DEVD_DIR, DEVD_SUFFIX);
+ if (udev_dev_d)
+ udev_multiplex_directory(&udev, DEVD_DIR, DEVD_SUFFIX);
}
- } else if ((strncmp(devpath, "/devices/", 9) == 0)) {
+ } else if (udev.type == PHYSDEV) {
if (strcmp(action, "add") == 0) {
/* wait for sysfs */
dbg("devices add");
}
hotplug:
- if (udev_hotplug_d && manage_hotplug_event())
+ if (udev_hotplug_d && managed_event)
udev_multiplex_directory(&udev, HOTPLUGD_DIR, HOTPLUG_SUFFIX);
exit: