X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev.c;h=30921420a0fe9514dab8cce4a0bc3a2e76ffd774;hp=094905ecc2025a90288c9eb5e0fb901bc0b951e3;hb=761e5b476f8e69f41958a62ed787f5d886fa212e;hpb=49d72e43487164194263d2c80dd27a4627f2169c diff --git a/udev.c b/udev.c index 094905ecc..6e0f7f1d0 100644 --- a/udev.c +++ b/udev.c @@ -3,8 +3,8 @@ * * Userspace devfs * - * Copyright (C) 2003 Greg Kroah-Hartman - * + * Copyright (C) 2003,2004 Greg Kroah-Hartman + * Copyright (C) 2004 Kay Sievers * * 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 @@ -21,170 +21,209 @@ * */ +#include +#include #include #include -#include #include -#include +#include #include +#include +#include +#include "libsysfs/sysfs/libsysfs.h" +#include "udev_libc_wrapper.h" #include "udev.h" +#include "udev_utils.h" +#include "udev_sysfs.h" #include "udev_version.h" -#include "namedev.h" -#include "udevdb.h" -#include "libsysfs/libsysfs.h" +#include "udev_rules.h" +#include "logging.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) +#ifdef USE_LOG +void log_message(int priority, const char *format, ...) { - char *action; + va_list args; - action = getenv("ACTION"); - return action; -} - -static inline char *get_devpath(void) -{ - char *devpath; - - devpath = getenv("DEVPATH"); - return devpath; -} - -static inline char *get_seqnum(void) -{ - char *seqnum; + if (priority > udev_log_priority) + return; - seqnum = getenv("SEQNUM"); - return seqnum; + va_start(args, format); + vsyslog(priority, 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 = UDEV_CONFIG_FILE; - char *udev_permission = UDEV_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("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_root, 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 udevice udev; + struct udev_rules rules; + char path[PATH_SIZE]; + const char *error; + const char *action; + const char *devpath; + const char *subsystem; + struct sigaction act; int retval = -EINVAL; - - main_argv = argv; - main_envp = envp; + if (argc == 2 && strcmp(argv[1], "-V") == 0) { + printf("%s\n", UDEV_VERSION); + exit(0); + } + + logging_init("udev"); + udev_init_config(); dbg("version %s", UDEV_VERSION); - if (argc != 2) { - dbg ("unknown number of arguments"); - goto exit; - } + /* 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); - subsystem = argv[1]; + /* trigger timeout to prevent hanging processes */ + alarm(UDEV_ALARM_TIMEOUT); - devpath = get_devpath(); - if (!devpath) { - dbg ("no devpath?"); - goto exit; - } - dbg("looking at '%s'", devpath); + action = getenv("ACTION"); + devpath = getenv("DEVPATH"); + subsystem = getenv("SUBSYSTEM"); + /* older kernels passed the SUBSYSTEM only as argument */ + if (!subsystem && argc == 2) + subsystem = argv[1]; - /* we only care about class devices and block stuff */ - if (!strstr(devpath, "class") && - !strstr(devpath, "block")) { - dbg("not a block or class device"); + if (!action || !subsystem || !devpath) { + err("action, subsystem or devpath missing"); 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; - } + /* export log_priority , as called programs may want to do the same as udev */ + if (udev_log_priority) { + char priority[32]; - action = get_action(); - if (!action) { - dbg ("no action?"); - goto exit; + sprintf(priority, "%i", udev_log_priority); + setenv("UDEV_LOG", priority, 1); } - /* initialize udev database */ - get_dirs(); - retval = udevdb_init(UDEVDB_DEFAULT); - if (retval != 0) { - dbg("unable to initialize database"); - goto exit; + udev_init_device(&udev, devpath, subsystem, action); + udev_rules_init(&rules, 0); + + if (udev.type == DEV_BLOCK || udev.type == DEV_CLASS || udev.type == DEV_NET) { + /* handle device node */ + if (strcmp(action, "add") == 0) { + struct sysfs_class_device *class_dev; + + /* wait for sysfs of /sys/class /sys/block */ + dbg("node add"); + snprintf(path, sizeof(path), "%s%s", sysfs_path, udev.devpath); + path[sizeof(path)-1] = '\0'; + class_dev = wait_class_device_open(path); + if (class_dev == NULL) { + dbg("open class device failed"); + goto run; + } + dbg("opened class_dev->name='%s'", class_dev->name); + wait_for_class_device(class_dev, &error); + + /* get major/minor */ + if (udev.type == DEV_BLOCK || udev.type == DEV_CLASS) + udev.devt = get_devt(class_dev); + + if (udev.type == DEV_NET || udev.devt) { + /* name device */ + udev_rules_get_name(&rules, &udev, class_dev); + if (udev.ignore_device) { + info("device event will be ignored"); + sysfs_close_class_device(class_dev); + goto cleanup; + } + if (udev.name[0] == '\0') { + info("device node creation supressed"); + sysfs_close_class_device(class_dev); + goto cleanup; + } + /* create node, store in db */ + retval = udev_add_device(&udev, class_dev); + } else { + dbg("no dev-file found"); + udev_rules_get_run(&rules, &udev, class_dev, NULL); + if (udev.ignore_device) { + info("device event will be ignored"); + sysfs_close_class_device(class_dev); + goto cleanup; + } + } + sysfs_close_class_device(class_dev); + } else if (strcmp(action, "remove") == 0) { + dbg("node remove"); + udev_rules_get_run(&rules, &udev, NULL, NULL); + if (udev.ignore_device) { + dbg("device event will be ignored"); + goto cleanup; + } + + /* get name from db, remove db-entry, delete node */ + retval = udev_remove_device(&udev); + } + + /* export name of device node or netif */ + if (udev.devname[0] != '\0') + setenv("DEVNAME", udev.devname, 1); + } else if (udev.type == DEV_DEVICE && strcmp(action, "add") == 0) { + struct sysfs_device *devices_dev; + + /* wait for sysfs of /sys/devices/ */ + dbg("devices add"); + snprintf(path, sizeof(path), "%s%s", sysfs_path, devpath); + path[sizeof(path)-1] = '\0'; + devices_dev = wait_devices_device_open(path); + if (!devices_dev) { + dbg("devices device unavailable (probably remove has beaten us)"); + goto run; + } + dbg("devices device opened '%s'", path); + wait_for_devices_device(devices_dev, &error); + udev_rules_get_run(&rules, &udev, NULL, devices_dev); + sysfs_close_device(devices_dev); + if (udev.ignore_device) { + info("device event will be ignored"); + goto cleanup; + } + } else { + dbg("default handling"); + udev_rules_get_run(&rules, &udev, NULL, NULL); + if (udev.ignore_device) { + info("device event will be ignored"); + goto cleanup; + } } - /* initialize the naming deamon */ - namedev_init(); - - if (strcmp(action, "add") == 0) - retval = udev_add_device(devpath, subsystem); +run: + if (udev_run && !list_empty(&udev.run_list)) { + struct name_entry *name_loop; - else if (strcmp(action, "remove") == 0) - retval = udev_remove_device(devpath, subsystem); - - else { - dbg("unknown action '%s'", action); - retval = -EINVAL; + dbg("executing run list"); + list_for_each_entry(name_loop, &udev.run_list, node) + execute_program(name_loop->name, udev.subsystem, NULL, 0, NULL); } - udevdb_exit(); -exit: +cleanup: + udev_cleanup_device(&udev); + +exit: + logging_close(); return retval; }