X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udev.c;h=f2d6f6653c3bc167ffdf3f981798f6d0241e3a84;hb=c699bc48e1432bc1b283907a52e461b97f2e45b1;hp=8746b9a8102820de64b0d72ec3bd882b8ed83ee0;hpb=d41120879358f783eb1a457f340c1a4b538a9410;p=elogind.git diff --git a/udev.c b/udev.c index 8746b9a81..f2d6f6653 100644 --- a/udev.c +++ b/udev.c @@ -1,10 +1,8 @@ /* * udev.c * - * Userspace devfs - * - * Copyright (C) 2003 Greg Kroah-Hartman - * + * Copyright (C) 2003-2004 Greg Kroah-Hartman + * Copyright (C) 2004-2005 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 @@ -21,171 +19,138 @@ * */ +#include +#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_version.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]; - +#include "udev_rules.h" +#include "logging.h" -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("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 udevice udev; + struct udev_rules rules; + const char *action; + const char *devpath; + const char *subsystem; + struct sigaction act; + int devnull; int retval = -EINVAL; - - main_argv = argv; - main_envp = envp; - dbg("version %s", UDEV_VERSION); + if (argc == 2 && strcmp(argv[1], "-V") == 0) { + printf("%s\n", UDEV_VERSION); + exit(0); + } - if (argc != 2) { - dbg ("unknown number of arguments"); - goto exit; + /* set std fd's to /dev/null, if the kernel forks us, we don't have them at all */ + devnull = open("/dev/null", O_RDWR); + if (devnull >= 0) { + if (devnull != STDIN_FILENO) + dup2(devnull, STDIN_FILENO); + if (devnull != STDOUT_FILENO) + dup2(devnull, STDOUT_FILENO); + if (devnull != STDERR_FILENO) + dup2(devnull, STDERR_FILENO); + if (devnull > STDERR_FILENO) + close(devnull); } - subsystem = argv[1]; + logging_init("udev"); + if (devnull < 0) + err("fatal, could not open /dev/null: %s", strerror(errno)); + udev_init_config(); + dbg("version %s", UDEV_VERSION); - devpath = get_devpath(); - if (!devpath) { - dbg ("no devpath?"); - goto exit; - } - dbg("looking at %s", devpath); + /* 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); - /* we only care about class devices and block stuff */ - if (!strstr(devpath, "class") && - !strstr(devpath, "block")) { - dbg("not block or class"); - goto exit; - } + /* trigger timeout to prevent hanging processes */ + alarm(UDEV_ALARM_TIMEOUT); - /* but we don't care about net class devices */ - if (strcmp(subsystem, "net") == 0) { - dbg("don't care about net devices"); - goto exit; - } + action = getenv("ACTION"); + devpath = getenv("DEVPATH"); + subsystem = getenv("SUBSYSTEM"); + /* older kernels passed the SUBSYSTEM only as argument */ + if (!subsystem && argc == 2) + subsystem = argv[1]; - action = get_action(); - if (!action) { - dbg ("no action?"); + if (!action || !subsystem || !devpath) { + err("action, subsystem or devpath missing"); goto exit; } - /* initialize udev database */ - get_dirs(); - retval = udevdb_init(UDEVDB_DEFAULT); - if (retval != 0) { - dbg("Unable to initialize database."); - goto exit; + /* export log_priority , as called programs may want to do the same as udev */ + if (udev_log_priority) { + char priority[32]; + + sprintf(priority, "%i", udev_log_priority); + setenv("UDEV_LOG", priority, 1); } - /* initialize the naming deamon */ - namedev_init(); + udev_init_device(&udev, devpath, subsystem, action); + udev_rules_init(&rules, 0); - if (strcmp(action, "add") == 0) - retval = udev_add_device(devpath, subsystem); + retval = udev_process_event(&rules, &udev); - else if (strcmp(action, "remove") == 0) - retval = udev_remove_device(devpath, subsystem); + if (!retval && udev_run && !list_empty(&udev.run_list)) { + struct name_entry *name_loop; - else { - dbg("Unknown action: %s", action); - retval = -EINVAL; + dbg("executing run list"); + list_for_each_entry(name_loop, &udev.run_list, node) { + if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0) + pass_env_to_socket(&name_loop->name[strlen("socket:")], devpath, action); + else + run_program(name_loop->name, udev.subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_INFO)); + } } - udevdb_exit(); -exit: + udev_rules_close(&rules); + udev_cleanup_device(&udev); + +exit: + logging_close(); return retval; } -