#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
-#include "udev_lib.h"
+#include "udev_utils.h"
#include "udev_sysfs.h"
#include "udev_version.h"
#include "namedev.h"
#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;
+ /* 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;
}
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;
+ 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 */
act.sa_handler = (void (*) (int))sig_handler;
sigemptyset (&act.sa_mask);
act.sa_flags = 0;
- /* alarm must not restart syscalls*/
sigaction(SIGALRM, &act, NULL);
sigaction(SIGINT, &act, NULL);
sigaction(SIGTERM, &act, NULL);
- /* trigger timeout to interrupt blocking syscalls */
+ /* trigger timeout to prevent hanging processes */
alarm(ALARM_TIMEOUT);
- udev_set_values(&udev, devpath, subsystem, action);
-
- if (strstr(argv[0], "udevstart") || (argv[1] != NULL && strstr(argv[1], "udevstart"))) {
+ if (strstr(argv[0], "udevstart") || (argc == 2 && strstr(argv[1], "udevstart"))) {
dbg("udevstart");
/* disable all logging, as it's much too slow on some facilities */
goto exit;
}
+ /* 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);
+
+ action = getenv("ACTION");
+ devpath = getenv("DEVPATH");
+ subsystem = getenv("SUBSYSTEM");
+ /* older kernels passed the SUBSYSTEM only as argument */
+ if (!subsystem && argc == 2)
+ subsystem = argv[1];
+
if (!action) {
dbg("no action");
goto hotplug;
}
-
if (!subsystem) {
dbg("no subsystem");
goto hotplug;
}
-
if (!devpath) {
dbg("no devpath");
goto hotplug;
if (udev_log)
setenv("UDEV_LOG", "1", 1);
- if ((strncmp(devpath, "/block/", 7) == 0) || (strncmp(devpath, "/class/", 7) == 0)) {
+ udev_init_device(&udev, devpath, subsystem);
+
+ 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 blacklisted subsystems */
- if (udev.type != 'n' && subsystem_expect_no_dev(udev.subsystem)) {
+ /* skip subsystems without "dev", but handle net devices */
+ if (udev.type != NET && subsystem_expect_no_dev(udev.subsystem)) {
dbg("don't care about '%s' devices", udev.subsystem);
goto hotplug;
- };
+ }
snprintf(path, SYSFS_PATH_MAX, "%s%s", sysfs_path, udev.devpath);
class_dev = wait_class_device_open(path);
wait_for_class_device(class_dev, &error);
- /* init rules, permissions */
+ /* init rules */
namedev_init();
/* name, create node, store in db */
retval = udev_add_device(&udev, class_dev);
- /* run dev.d/ scripts if we created a node or changed a netif name */
- if (udev.devname[0] != '\0') {
- setenv("DEVNAME", udev.devname, 1);
- dev_d_execute(&udev, DEVD_DIR, DEVD_SUFFIX);
- }
-
sysfs_close_class_device(class_dev);
} else if (strcmp(action, "remove") == 0) {
/* possibly remove a node */
dbg("udev remove");
+ /* skip subsystems without "dev" */
+ if (subsystem_expect_no_dev(udev.subsystem)) {
+ dbg("don't care about '%s' devices", udev.subsystem);
+ goto hotplug;
+ }
+
/* get node from db, remove db-entry, delete created node */
retval = udev_remove_device(&udev);
+ }
- /* Set the DEVNAME if known */
- if (udev.devname[0] != '\0') {
- setenv("DEVNAME", udev.devname, 1);
- }
- /* run dev.d/ scripts if we're not instructed to ignore the event */
- if (udev.devname[0] != '\0') {
- setenv("DEVNAME", udev.devname, 1);
- dev_d_execute(&udev, DEVD_DIR, DEVD_SUFFIX);
- }
-
+ /* run dev.d/ scripts if we created/deleted a node or changed a netif name */
+ if (udev.devname[0] != '\0') {
+ setenv("DEVNAME", udev.devname, 1);
+ 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 (manage_hotplug_event())
- dev_d_execute(&udev, HOTPLUGD_DIR, HOTPLUG_SUFFIX);
+ if (udev_hotplug_d && managed_event)
+ udev_multiplex_directory(&udev, HOTPLUGD_DIR, HOTPLUG_SUFFIX);
exit:
logging_close();
~ianmdlvl / elogind.git / blobdiff