X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev.c;h=2a6e1efc9932e1699b9f0b69e3b2222a12f8a9a0;hp=8c91ac62d4f303b40b4b59a8c4af0892ef76c9b1;hb=d455b0085d65cd25915a34d84f894a4950d313a2;hpb=c80da5085f915bf6305e7ed6b786b63f6e9b14ea diff --git a/udev.c b/udev.c index 8c91ac62d..2a6e1efc9 100644 --- a/udev.c +++ b/udev.c @@ -1,9 +1,8 @@ /* * udev.c * - * Userspace devfs - * - * Copyright (C) 2003,2004 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 @@ -20,181 +19,121 @@ * */ +#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 "udev_dbus.h" +#include "udev_rules.h" #include "logging.h" -#include "namedev.h" -#include "udevdb.h" - -/* global variables */ -char **main_argv; -char **main_envp; -#ifdef LOG -unsigned char logname[42]; -void log_message (int level, const char *format, ...) +#ifdef USE_LOG +void log_message(int priority, const char *format, ...) { - va_list args; + va_list args; - if (!udev_log) + if (priority > udev_log_priority) return; va_start(args, format); - vsyslog(level, format, args); + vsyslog(priority, format, args); va_end(args); } #endif -static void sig_handler(int signum) +static void asmlinkage sig_handler(int signum) { switch (signum) { + case SIGALRM: + exit(1); case SIGINT: case SIGTERM: - sysbus_disconnect(); - udevdb_exit(); exit(20 + signum); - default: - dbg("unhandled signal"); } } -static inline char *get_action(void) -{ - char *action; - - action = getenv("ACTION"); - return action; -} - -static inline char *get_devpath(void) -{ - char *devpath; - - devpath = getenv("DEVPATH"); - return devpath; -} - -static inline char *get_seqnum(void) +int main(int argc, char *argv[], char *envp[]) { - char *seqnum; - - seqnum = getenv("SEQNUM"); - return seqnum; -} - -static char *subsystem_blacklist[] = { - "net", - "scsi_host", - "scsi_device", - "usb_host", - "pci_bus", - "", -}; - -static int udev_hotplug(int argc, char **argv) -{ - char *action; - char *devpath; - char *subsystem; - int retval = -EINVAL; - int i; + struct udevice udev; + struct udev_rules rules; + const char *action; + const char *devpath; + const char *subsystem; struct sigaction act; + int retval = -EINVAL; - action = get_action(); - if (!action) { - dbg ("no 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; - } - - /* skip blacklisted subsystems */ - subsystem = argv[1]; - i = 0; - while (subsystem_blacklist[i][0] != '\0') { - if (strcmp(subsystem, subsystem_blacklist[i]) == 0) { - dbg("don't care about '%s' devices", subsystem); - goto exit; - } - i++; + if (argc == 2 && strcmp(argv[1], "-V") == 0) { + printf("%s\n", UDEV_VERSION); + exit(0); } - /* connect to the system message bus */ - sysbus_connect(); - - /* initialize our configuration */ + logging_init("udev"); udev_init_config(); + dbg("version %s", UDEV_VERSION); - /* initialize udev database */ - retval = udevdb_init(UDEVDB_DEFAULT); - if (retval != 0) { - dbg("unable to initialize database"); - goto exit_sysbus; - } - - /* set up a default signal handler for now */ - act.sa_handler = sig_handler; + /* set signal handlers */ + memset(&act, 0x00, sizeof(act)); + act.sa_handler = (void (*)(int)) sig_handler; sigemptyset (&act.sa_mask); - act.sa_flags = SA_RESTART; + act.sa_flags = 0; + sigaction(SIGALRM, &act, NULL); sigaction(SIGINT, &act, NULL); sigaction(SIGTERM, &act, NULL); - /* initialize the naming deamon */ - namedev_init(); - - if (strcmp(action, "add") == 0) - retval = udev_add_device(devpath, subsystem, 0); + /* trigger timeout to prevent hanging processes */ + alarm(UDEV_ALARM_TIMEOUT); - else if (strcmp(action, "remove") == 0) - retval = udev_remove_device(devpath, subsystem); + action = getenv("ACTION"); + devpath = getenv("DEVPATH"); + subsystem = getenv("SUBSYSTEM"); + /* older kernels passed the SUBSYSTEM only as argument */ + if (!subsystem && argc == 2) + subsystem = argv[1]; - else { - dbg("unknown action '%s'", action); - retval = -EINVAL; + if (!action || !subsystem || !devpath) { + err("action, subsystem or devpath missing"); + goto exit; } - udevdb_exit(); -exit_sysbus: - /* disconnect from the system message bus */ - sysbus_disconnect(); + /* export log_priority , as called programs may want to do the same as udev */ + if (udev_log_priority) { + char priority[32]; -exit: - if (retval > 0) - retval = 0; + sprintf(priority, "%i", udev_log_priority); + setenv("UDEV_LOG", priority, 1); + } - return -retval; -} + udev_init_device(&udev, devpath, subsystem, action); + udev_rules_init(&rules, 0); -int main(int argc, char **argv, char **envp) -{ - main_argv = argv; - main_envp = envp; + retval = udev_process_event(&rules, &udev); - init_logging("udev"); - dbg("version %s", UDEV_VERSION); + if (!retval && udev_run && !list_empty(&udev.run_list)) { + struct name_entry *name_loop; - return udev_hotplug(argc, argv); -} + 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 + execute_program(name_loop->name, udev.subsystem, NULL, 0, NULL); + } + } + udev_cleanup_device(&udev); +exit: + logging_close(); + return retval; +}