*
* Userspace devfs
*
- * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
- *
+ * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
*
* 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
*
*/
+#define _KLIBC_HAS_ARCH_SIG_ATOMIC_T
+#include <stdio.h>
+#include <stddef.h>
#include <stdlib.h>
#include <string.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <unistd.h>
+#include <ctype.h>
#include <errno.h>
+#include <signal.h>
+#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
+#include "udev_lib.h"
#include "udev_version.h"
+#include "logging.h"
#include "namedev.h"
+#include "udevdb.h"
+/* timeout flag for udevdb */
+extern sig_atomic_t gotalarm;
-static char *get_action(void)
-{
- char *action;
-
- action = getenv("ACTION");
- return action;
-}
-
+/* global variables */
+char **main_argv;
+char **main_envp;
-static char *get_device(void)
+#ifdef LOG
+unsigned char logname[LOGNAME_SIZE];
+void log_message(int level, const char *format, ...)
{
- static char device[255];
- char *temp;
+ va_list args;
- temp = getenv("DEVPATH");
- if (temp == NULL)
- return NULL;
- strcpy(device, "");
-// strcpy(device, SYSFS_ROOT);
- strcat(device, temp);
+ if (!udev_log)
+ return;
- return device;
-}
-
-/*
- * Right now the major/minor of a device is stored in a file called
- * "dev" in sysfs.
- * The number is stored as:
- * MMmm
- * MM is the major
- * mm is the minor
- * The value is in hex.
- * Yes, this will probably change when we go to a bigger major/minor
- * range, and will have to be changed at that time.
- */
-static int get_major_minor (char *dev, int *major, int *minor)
-{
- char filename[255];
- char line[20];
- char temp[3];
- int fd;
- int retval = 0;
-
- /* add the dev file to the directory and see if it's present */
- strncpy(filename, dev, sizeof(filename));
- strncat(filename, DEV_FILE, sizeof(filename));
- fd = open(filename, O_RDONLY);
- if (fd < 0) {
- dbg("Can't open %s", filename);
- return -ENODEV;
- }
-
- /* get the major/minor */
- retval = read(fd, line, sizeof(line));
- if (retval < 0) {
- dbg("read error on %s", dev);
- goto exit;
- }
-
- temp[0] = line[0];
- temp[1] = line[1];
- temp[2] = 0x00;
- *major = (int)strtol(&temp[0], NULL, 16);
-
- temp[0] = line[2];
- temp[1] = line[3];
- temp[2] = 0x00;
- *minor = (int)strtol(&temp[0], NULL, 16);
-
- dbg("found major = %d, minor = %d", *major, *minor);
-
- retval = 0;
-exit:
- close(fd);
- return retval;
-}
-
-/*
- * Here would go a call to the naming deamon, to get the name we want to have
- * for this device. But for now, let's just default to whatever the kernel is
- * calling the device as that will keep the "old-style" naming policy
- */
-static char *get_name(char *dev, int major, int minor)
-{
- static char name[100];
- char *temp;
-
- temp = strrchr(dev, '/');
- if (temp == NULL)
- return NULL;
- strncpy(name, &temp[1], sizeof(name));
-
- dbg("name is %s", name);
-
- return &name[0];
-}
-
-/*
- * Again, this will live in the naming deamon
- */
-static int get_mode(char *name, char *dev, int major, int minor)
-{
- /* just default everyone to rw for the world! */
- return 0666;
+ va_start(args, format);
+ vsyslog(level, format, args);
+ va_end(args);
}
+#endif
-/*
- * We also want to add some permissions here, and possibly some symlinks
- */
-static int create_node(char *name, char type, int major, int minor, int mode)
+static void asmlinkage sig_handler(int signum)
{
- char *argv[7];
- char mode_string[100];
- char type_string[3];
- char major_string[20];
- char minor_string[20];
- char filename[255];
- int retval = 0;
-
- strncpy(filename, UDEV_ROOT, sizeof(filename));
- strncat(filename, name, sizeof(filename));
-
- snprintf(mode_string, sizeof(mode_string), "--mode=%#o", mode);
- snprintf(type_string, sizeof(type_string), "%c", type);
- snprintf(major_string, sizeof(major_string), "%d", major);
- snprintf(minor_string, sizeof(minor_string), "%d", minor);
-
- argv[0] = MKNOD;
- argv[1] = mode_string;
- argv[2] = filename;
- argv[3] = type_string;
- argv[4] = major_string;
- argv[5] = minor_string;
- argv[6] = NULL;
- dbg ("executing %s %s %s %s %s %s",
- argv[0], argv[1], argv[2], argv[3], argv[4], argv[5]);
- switch (fork()) {
- case 0:
- /* we are the child, so lets run the program */
- execv (MKNOD, argv);
- exit(0);
- break;
- case (-1):
- dbg ("fork failed.");
- retval = -EFAULT;
+ switch (signum) {
+ case SIGALRM:
+ gotalarm = 1;
+ info("error: timeout reached, event probably not handled correctly");
break;
+ case SIGINT:
+ case SIGTERM:
+ udevdb_exit();
+ exit(20 + signum);
default:
- break;
+ dbg("unhandled signal %d", signum);
}
- return retval;
}
-/*
- * We also want to clean up any symlinks that were created in create_node()
+/* list of subsystems we don't care about. not listing such systems here
+ * is not critical, but it makes it faster as we don't look for the "dev" file
*/
-static int delete_node(char *name)
-{
- char filename[255];
-
- strncpy(filename, UDEV_ROOT, sizeof(filename));
- strncat(filename, name, sizeof(filename));
-
- dbg("unlinking %s", filename);
- return unlink(filename);
-}
-
-static int add_device(char *device, char type, struct device_attr *attr)
+static int subsystem_without_dev(const char *subsystem)
{
- char *name;
- int major;
- int minor;
- int mode;
- int retval = -EINVAL;
-#if 0
- retval = get_major_minor(device, &major, &minor);
- if (retval) {
- dbg ("get_major_minor failed");
- goto exit;
- }
-
- name = get_name(device, major, minor);
- if (name == NULL) {
- dbg ("get_name failed");
- retval = -ENODEV;
- goto exit;
- }
-
- mode = get_mode(name, device, major, minor);
- if (mode < 0) {
- dbg ("get_mode failed");
- retval = -EINVAL;
- goto exit;
+ char *subsystem_blacklist[] = {
+ "scsi_host",
+ "scsi_device",
+ "usb_host",
+ "pci_bus",
+ "pcmcia_socket",
+ "bluetooth",
+ "i2c-adapter",
+ "pci_bus",
+ "ieee1394",
+ "ieee1394_host",
+ "ieee1394_node",
+ NULL
+ };
+ char **subsys;
+
+ for (subsys = subsystem_blacklist; *subsys != NULL; subsys++) {
+ if (strcmp(subsystem, *subsys) == 0)
+ return 1;
}
-#endif
- return create_node(attr->name, type, attr->major, attr->minor, attr->mode);
-exit:
- return retval;
+ return 0;
}
-static int remove_device(char *device)
+int main(int argc, char *argv[], char *envp[])
{
- char *name;
- int retval = 0;
-
- name = get_name(device, 0, 0);
- if (name == NULL) {
- dbg ("get_name failed");
- retval = -ENODEV;
- goto exit;
- }
-
- return delete_node(name);
-
-exit:
- return retval;
-}
-
-int main(int argc, char *argv[])
-{
- struct device_attr attr;
- char *subsystem;
+ main_argv = argv;
+ main_envp = envp;
+ struct sigaction act;
char *action;
- char *device;
- char type;
+ char *devpath = "";
+ char *subsystem = "";
int retval = -EINVAL;
-
- if (argc != 2) {
- dbg ("unknown number of arguments");
- goto exit;
- }
-
- namedev_init();
-
- /* sleep for a second or two to give the kernel a chance to
- * create the dev file
- */
- sleep(2);
-
- /* for now, the block layer is the only place where block devices are */
- subsystem = argv[1];
- if (strcmp(subsystem, "block") == 0)
- type = 'b';
- else
- type = 'c';
-
- action = get_action();
- if (!action) {
- dbg ("no action?");
- goto exit;
+ enum {
+ ADD,
+ REMOVE,
+ UDEVSTART,
+ } act_type;
+
+ dbg("version %s", UDEV_VERSION);
+
+ init_logging("udev");
+
+ udev_init_config();
+
+ if (strstr(argv[0], "udevstart")) {
+ act_type = UDEVSTART;
+ } else {
+ action = get_action();
+ if (!action) {
+ dbg("no action?");
+ goto exit;
+ }
+ if (strcmp(action, "add") == 0) {
+ act_type = ADD;
+ } else if (strcmp(action, "remove") == 0) {
+ act_type = REMOVE;
+ } else {
+ dbg("unknown action '%s'", action);
+ goto exit;
+ }
+
+ devpath = get_devpath();
+ if (!devpath) {
+ dbg("no devpath?");
+ goto exit;
+ }
+ dbg("looking at '%s'", devpath);
+
+ /* we only care about class devices and block stuff */
+ if (!strstr(devpath, "class") && !strstr(devpath, "block")) {
+ dbg("not a block or class device");
+ goto exit;
+ }
+
+ subsystem = get_subsystem(main_argv[1]);
+ if (!subsystem) {
+ dbg("no subsystem?");
+ goto exit;
+ }
+
+ /* skip blacklisted subsystems */
+ if (subsystem_without_dev(subsystem)) {
+ dbg("don't care about '%s' devices", subsystem);
+ exit(0);
+ };
}
- device = get_device();
- if (!device) {
- dbg ("no device?");
- goto exit;
+ /* set signal handlers */
+ act.sa_handler = (void (*) (int))sig_handler;
+ sigemptyset (&act.sa_mask);
+ /* alarm must not restart syscalls*/
+ sigaction(SIGALRM, &act, NULL);
+ sigaction(SIGINT, &act, NULL);
+ sigaction(SIGTERM, &act, NULL);
+
+ /* trigger timout to interrupt blocking syscalls */
+ alarm(ALARM_TIMEOUT);
+
+ /* initialize udev database */
+ if (udevdb_init(UDEVDB_DEFAULT) != 0)
+ info("error: unable to initialize database, continuing without database");
+
+ switch(act_type) {
+ case UDEVSTART:
+ dbg("udevstart");
+ namedev_init();
+ retval = udev_start();
+ break;
+ case ADD:
+ dbg("udev add");
+ namedev_init();
+ retval = udev_add_device(devpath, subsystem, NOFAKE);
+ break;
+ case REMOVE:
+ dbg("udev remove");
+ retval = udev_remove_device(devpath, subsystem);
}
- dbg("looking at %s", device);
-
- retval = namedev_name_device(device, &attr);
- if (retval)
- return retval;
- if (strcmp(action, "add") == 0)
- return add_device(device, type, &attr);
+ udevdb_exit();
- if (strcmp(action, "remove") == 0)
- return remove_device(device);
-
- dbg("Unknown action: %s", action);
- return -EINVAL;
-
- retval = 0;
-exit:
+exit:
return retval;
}
-
~ianmdlvl / elogind.git / blobdiff