X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udev.c;h=300e85ceb0aa0737c74f589cc39de53e43ed6f41;hb=af4b05d4917fdfa55eff3d8d53a830464d8162a1;hp=ed42862c00881d195e10012b8ca2dd964501dcfa;hpb=c2f17c9ea8a90d1c12158b947b3f8096404afe33;p=elogind.git diff --git a/udev.c b/udev.c index ed42862c0..300e85ceb 100644 --- a/udev.c +++ b/udev.c @@ -3,8 +3,7 @@ * * Userspace devfs * - * Copyright (C) 2003 Greg Kroah-Hartman - * + * Copyright (C) 2003,2004 Greg Kroah-Hartman * * 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 @@ -21,171 +20,167 @@ * */ +#include +#include #include #include -#include -#include -#include +#include #include +#include +#include +#include "libsysfs/sysfs/libsysfs.h" #include "udev.h" +#include "udev_lib.h" +#include "udev_sysfs.h" #include "udev_version.h" +#include "logging.h" #include "namedev.h" #include "udevdb.h" -#include "libsysfs/libsysfs.h" - -/* global variables */ -char **main_argv; -char **main_envp; - -char sysfs_path[SYSFS_PATH_MAX]; -char *udev_config_dir = UDEV_CONFIG_DIR; -char *udev_root = UDEV_ROOT; -char udev_db_filename[PATH_MAX+NAME_MAX]; -char udev_config_permission_filename[PATH_MAX+NAME_MAX]; -char udev_config_filename[PATH_MAX+NAME_MAX]; - -static inline char *get_action(void) -{ - char *action; - - action = getenv("ACTION"); - return action; -} -static inline char *get_devpath(void) +#ifdef LOG +unsigned char logname[LOGNAME_SIZE]; +void log_message(int level, const char *format, ...) { - char *devpath; - - devpath = getenv("DEVPATH"); - return devpath; -} + va_list args; -static inline char *get_seqnum(void) -{ - char *seqnum; + if (!udev_log) + return; - seqnum = getenv("SEQNUM"); - return seqnum; + va_start(args, format); + vsyslog(level, format, args); + va_end(args); } +#endif -static void get_dirs(void) +static void asmlinkage sig_handler(int signum) { - char *temp; - char *udev_db = UDEV_DB; - char *udev_config = NAMEDEV_CONFIG_FILE; - char *udev_permission = NAMEDEV_CONFIG_PERMISSION_FILE; - int retval; - - retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX); - if (retval) - dbg("sysfs_get_mnt_path failed"); - - /* see if we should try to override any of the default values */ - temp = getenv("UDEV_TEST"); - if (temp != NULL) { - /* hm testing is happening, use the specified values, if they are present */ - temp = getenv("UDEV_SYSFS_PATH"); - if (temp) - strncpy(sysfs_path, temp, sizeof(sysfs_path)); - temp = getenv("UDEV_CONFIG_DIR"); - if (temp) - udev_config_dir = temp; - temp = getenv("UDEV_ROOT"); - if (temp) - udev_root = temp; - temp = getenv("UDEV_DB"); - if (temp) - udev_db = temp; - temp = getenv("UDEV_CONFIG_FILE"); - if (temp) - udev_config = temp; - temp = getenv("UDEV_PERMISSION_FILE"); - if (temp) - udev_permission = temp; + switch (signum) { + case SIGALRM: + exit(1); + case SIGINT: + case SIGTERM: + exit(20 + signum); } - dbg("sysfs_path = %s", sysfs_path); - - strncpy(udev_db_filename, udev_config_dir, sizeof(udev_db_filename)); - strncat(udev_db_filename, udev_db, sizeof(udev_db_filename)); - - strncpy(udev_config_filename, udev_config_dir, sizeof(udev_config_filename)); - strncat(udev_config_filename, udev_config, sizeof(udev_config_filename)); - - strncpy(udev_config_permission_filename, udev_config_dir, sizeof(udev_config_permission_filename)); - strncat(udev_config_permission_filename, udev_permission, sizeof(udev_config_permission_filename)); } -int main(int argc, char **argv, char **envp) +int main(int argc, char *argv[], char *envp[]) { - char *action; - char *devpath; - char *subsystem; + struct sigaction act; + struct sysfs_class_device *class_dev; + struct udevice udev; + char path[SYSFS_PATH_MAX]; int retval = -EINVAL; - - main_argv = argv; - main_envp = envp; + enum { + ADD, + REMOVE, + UDEVSTART, + } act_type; dbg("version %s", UDEV_VERSION); + logging_init("udev"); + udev_init_config(); + + if (strstr(argv[0], "udevstart") || (argv[1] != NULL && strstr(argv[1], "udevstart"))) { + act_type = UDEVSTART; + } else { + const char *action = getenv("ACTION"); + const char *devpath = getenv("DEVPATH"); + const char *subsystem = argv[1]; + + 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("no action '%s' for us", action); + goto exit; + } + + 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; + } + + if (!subsystem) { + dbg("no subsystem"); + goto exit; + } + + udev_set_values(&udev, devpath, subsystem, action); + + /* skip blacklisted subsystems */ + if (udev.type != 'n' && subsystem_expect_no_dev(subsystem)) { + dbg("don't care about '%s' devices", subsystem); + goto exit; + }; - if (argc != 2) { - dbg ("unknown number of arguments"); - goto exit; } - subsystem = argv[1]; - - 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 block or class"); - goto exit; - } - - /* but we don't care about net class devices */ - if (strcmp(subsystem, "net") == 0) { - dbg("don't care about net devices"); - goto exit; - } - - action = get_action(); - if (!action) { - dbg ("no action?"); - goto exit; + /* 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 timout to interrupt blocking syscalls */ + alarm(ALARM_TIMEOUT); + + switch(act_type) { + case UDEVSTART: + dbg("udevstart"); + namedev_init(); + retval = udev_start(); + break; + case ADD: + dbg("udev add"); + + /* open the device */ + snprintf(path, SYSFS_PATH_MAX, "%s%s", sysfs_path, udev.devpath); + class_dev = sysfs_open_class_device_path(path); + if (class_dev == NULL) { + dbg ("sysfs_open_class_device_path failed"); + break; + } + dbg("opened class_dev->name='%s'", class_dev->name); + + /* init rules */ + namedev_init(); + + /* name, create node, store in db */ + retval = udev_add_device(&udev, class_dev); + + /* run scripts */ + dev_d_execute(&udev); + + sysfs_close_class_device(class_dev); + break; + case REMOVE: + dbg("udev remove"); + + /* get node from db, delete it*/ + retval = udev_remove_device(&udev); + + /* run scripts */ + dev_d_execute(&udev); } - /* initialize udev database */ - get_dirs(); - retval = udevdb_init(UDEVDB_DEFAULT); - if (retval != 0) { - dbg("Unable to initialize database."); - goto exit; - } - - /* initialize the naming deamon */ - namedev_init(); - - if (strcmp(action, "add") == 0) - retval = udev_add_device(devpath, subsystem); - - else if (strcmp(action, "remove") == 0) - retval = udev_remove_device(devpath, subsystem); - - else { - dbg("Unknown action: %s", action); - retval = -EINVAL; - } - udevdb_exit(); - -exit: +exit: + logging_close(); return retval; } -