X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev.c;h=e6f2744fcbefe0826255550a0879e9f2f1c440a3;hp=8d650c2561ddaa1f5d11bfb8d0340d59b1761810;hb=a551c7b0ceb72145a5256cdd53b0b52ff9f766de;hpb=c056c5141b16fe95485eeb233fe8b90954686a60 diff --git a/udev.c b/udev.c index 8d650c256..e6f2744fc 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 @@ -21,158 +20,162 @@ * */ +#include +#include #include #include -#include -#include -#include +#include #include +#include +#include "libsysfs/sysfs/libsysfs.h" #include "udev.h" +#include "udev_lib.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; -char *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; + va_list args; - devpath = getenv("DEVPATH"); - return devpath; -} - -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) +asmlinkage static void sig_handler(int signum) { - char *udev_test; - char *temp; - int retval; - - udev_test = getenv("UDEV_TEST"); - if (udev_test == NULL) { - /* normal operation, use the compiled in defaults */ - udev_config_dir = UDEV_CONFIG_DIR; - udev_root = UDEV_ROOT; - retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX); - dbg("sysfs_path = %s", sysfs_path); - if (retval) - dbg("sysfs_get_mnt_path failed"); - - } else { - /* hm testing is happening, use the specified values */ - temp = getenv("UDEV_SYSFS_PATH"); - strncpy(sysfs_path, temp, sizeof(sysfs_path)); - udev_config_dir = getenv("UDEV_CONFIG_DIR"); - udev_root = getenv("UDEV_ROOT"); + switch (signum) { + case SIGINT: + case SIGTERM: + udevdb_exit(); + exit(20 + signum); + default: + dbg("unhandled signal %d", signum); } - - 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, NAMEDEV_CONFIG_FILE, sizeof(udev_config_filename)); - - strncpy(udev_config_permission_filename, udev_config_dir, sizeof(udev_config_permission_filename)); - strncat(udev_config_permission_filename, NAMEDEV_CONFIG_PERMISSION_FILE, sizeof(udev_config_permission_filename)); } -int main(int argc, char **argv, char **envp) +static char *subsystem_blacklist[] = { + "scsi_host", + "scsi_device", + "usb_host", + "pci_bus", + "pcmcia_socket", + "" +}; + +int main(int argc, char *argv[], char *envp[]) { - char *action; - char *devpath; - char *subsystem; - int retval = -EINVAL; - main_argv = argv; main_envp = envp; + struct sigaction act; + char *action; + char *devpath = ""; + char *subsystem = ""; + int i; + int retval = -EINVAL; + enum { + ADD, + REMOVE, + UDEVSTART, + } act_type; dbg("version %s", UDEV_VERSION); - 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; - } + /* initialize our configuration */ + udev_init_config(); - /* but we don't care about net class devices */ - if (strcmp(subsystem, "net") == 0) { - dbg("don't care about net devices"); - goto exit; + if (strstr(argv[0], "udevstart")) { + act_type = UDEVSTART; + } else { + action = get_action(); + 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("unknown action '%s'", 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; + } + + subsystem = get_subsystem(main_argv[1]); + if (!subsystem) { + dbg("no subsystem?"); + 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 = get_action(); - if (!action) { - dbg ("no action?"); - goto exit; - } + /* set signal handlers */ + act.sa_handler = sig_handler; + sigemptyset (&act.sa_mask); + act.sa_flags = SA_RESTART; + sigaction(SIGINT, &act, NULL); + sigaction(SIGTERM, &act, NULL); /* initialize udev database */ - get_dirs(); - retval = udevdb_init(UDEVDB_DEFAULT); - if (retval != 0) { - dbg("Unable to initialize database."); + if (udevdb_init(UDEVDB_DEFAULT) != 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) + switch(act_type) { + case UDEVSTART: + dbg("udevstart"); + namedev_init(); + udev_sleep = 0; + retval = udev_start(); + break; + case ADD: + dbg("udev add"); + namedev_init(); + retval = udev_add_device(devpath, subsystem, NOFAKE); + break; + case REMOVE: + dbg("udev remove"); retval = udev_remove_device(devpath, subsystem); - - else { - dbg("Unknown action: %s", action); - retval = -EINVAL; } + udevdb_exit(); -exit: +exit: return retval; } -