X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udev.c;h=f2d6f6653c3bc167ffdf3f981798f6d0241e3a84;hb=c699bc48e1432bc1b283907a52e461b97f2e45b1;hp=1222b239efe1787f02e2690a5f520fb87d5e0b67;hpb=8eb38ef882192445bd0e012351a6192a2968a76c;p=elogind.git diff --git a/udev.c b/udev.c index 1222b239e..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 @@ -21,229 +19,138 @@ * */ +#include +#include #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 "udev_dbus.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; +#ifdef USE_LOG +void log_message(int priority, const char *format, ...) +{ + va_list args; + + if (priority > udev_log_priority) + return; + + va_start(args, format); + vsyslog(priority, format, args); + va_end(args); +} +#endif -static void sig_handler(int signum) +static void asmlinkage sig_handler(int signum) { - dbg("caught signal %d", signum); switch (signum) { + case SIGALRM: + exit(1); case SIGINT: case SIGTERM: - case SIGKILL: - sysbus_disconnect(); - udevdb_exit(); exit(20 + signum); - break; - default: - dbg("unhandled signal"); } } -static inline char *get_action(void) +int main(int argc, char *argv[], char *envp[]) { - 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) -{ - char *seqnum; - - seqnum = getenv("SEQNUM"); - return seqnum; -} - -static inline int udev_user(int argc, char **argv) -{ - static const char short_options[] = "q:rVh"; - int option; + struct udevice udev; + struct udev_rules rules; + const char *action; + const char *devpath; + const char *subsystem; + struct sigaction act; + int devnull; int retval = -EINVAL; - struct udevice dev; - - while (1) { - option = getopt(argc, argv, short_options); - if (option == -1) - break; - - dbg("option '%c'", option); - switch (option) { - case 'q': - dbg("udev query: %s\n", optarg); - retval = udevdb_open_ro(); - if (retval != 0) { - printf("unable to open udev database\n"); - return -1; - } - retval = udevdb_get_dev(optarg, &dev); - if (retval == 0) { - printf("%s\n", dev.name); - } else { - printf("device not found in udev database\n"); - } - udevdb_exit(); - return retval; - - case 'r': - printf("%s\n", udev_root); - return 0; - - case 'V': - printf("udev, version %s\n", UDEV_VERSION); - return 0; - - case 'h': - retval = 0; - case '?': - default: - goto help; - } - } -help: - printf("Usage: [-qrVh]\n" - " -q query database for the name of the created node\n" - " -r print udev root\n" - " -V print udev version\n" - " -h print this help text\n" - "\n"); - - return retval; -} + if (argc == 2 && strcmp(argv[1], "-V") == 0) { + printf("%s\n", UDEV_VERSION); + exit(0); + } -static char *subsystem_blacklist[] = { - "net", - "scsi_host", - "scsi_device", - "", -}; + /* 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); + } -static inline int udev_hotplug(int argc, char **argv) -{ - char *action; - char *devpath; - char *subsystem; - int retval = -EINVAL; - int i; + logging_init("udev"); + if (devnull < 0) + err("fatal, could not open /dev/null: %s", strerror(errno)); + udev_init_config(); + dbg("version %s", UDEV_VERSION); - subsystem = argv[1]; + /* 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); - devpath = get_devpath(); - if (!devpath) { - dbg ("no devpath?"); - goto exit; - } - dbg("looking at '%s'", devpath); + /* trigger timeout to prevent hanging processes */ + alarm(UDEV_ALARM_TIMEOUT); - /* 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 */ - 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++; - } + 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; } - /* connect to the system message bus */ - sysbus_connect(); + /* export log_priority , as called programs may want to do the same as udev */ + if (udev_log_priority) { + char priority[32]; - /* initialize udev database */ - retval = udevdb_init(UDEVDB_DEFAULT); - if (retval != 0) { - dbg("unable to initialize database"); - goto exit_sysbus; + sprintf(priority, "%i", udev_log_priority); + setenv("UDEV_LOG", priority, 1); } - /* set up a default signal handler for now */ - signal(SIGINT, sig_handler); - signal(SIGTERM, sig_handler); - signal(SIGKILL, sig_handler); + udev_init_device(&udev, devpath, subsystem, action); + udev_rules_init(&rules, 0); - /* initialize the naming deamon */ - namedev_init(); + retval = udev_process_event(&rules, &udev); - if (strcmp(action, "add") == 0) - retval = udev_add_device(devpath, subsystem); + if (!retval && 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) { + 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_sysbus: - /* disconnect from the system message bus */ - sysbus_disconnect(); + udev_rules_close(&rules); + udev_cleanup_device(&udev); exit: + logging_close(); return retval; } - -int main(int argc, char **argv, char **envp) -{ - main_argv = argv; - main_envp = envp; - int retval; - - dbg("version %s", UDEV_VERSION); - - /* initialize our configuration */ - udev_init_config(); - - if (argc == 2 && argv[1][0] != '-') { - dbg("called by hotplug"); - retval = udev_hotplug(argc, argv); - } else { - dbg("called by user"); - retval = udev_user(argc, argv); - } - - return retval; -} - -