X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev.c;h=9b4d91f75cea26373c9aebc7688b0d992d0c3089;hp=67b86e5916ced757a921bbbd442bee3e876c6298;hb=656703759d7d3eac6e8c86f1121cde7dfd6d8cbd;hpb=5aebfbcb62614fc2bf2b1579d62e3fe272c6751a diff --git a/udev.c b/udev.c index 67b86e591..9b4d91f75 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 @@ -24,121 +23,78 @@ #include #include #include -#include -#include #include #include +#include +#include "libsysfs/sysfs/libsysfs.h" #include "udev.h" #include "udev_version.h" +#include "udev_dbus.h" +#include "logging.h" #include "namedev.h" #include "udevdb.h" -#include "libsysfs/libsysfs.h" /* global variables */ char **main_argv; char **main_envp; -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; - - devpath = getenv("DEVPATH"); - return devpath; -} - -static inline char *get_seqnum(void) -{ - char *seqnum; - - seqnum = getenv("SEQNUM"); - return seqnum; -} - -#ifdef USE_DBUS - -/** Global variable for the connection the to system message bus or #NULL - * if we cannot connect or acquire the org.kernel.udev service - */ -DBusConnection* sysbus_connection; + va_list args; -/** Disconnect from the system message bus */ -static void sysbus_disconnect() -{ - if (sysbus_connection == NULL) - return; + if (!udev_log) + return; - dbus_connection_disconnect(sysbus_connection); - sysbus_connection = NULL; + va_start(args, format); + vsyslog(level, format, args); + va_end(args); } +#endif -/** Connect to the system message bus */ -static void sysbus_connect() +static void sig_handler(int signum) { - DBusError error; - - /* Connect to a well-known bus instance, the system bus */ - dbus_error_init(&error); - sysbus_connection = dbus_bus_get(DBUS_BUS_SYSTEM, &error); - if (sysbus_connection == NULL) { - dbg("cannot connect to system message bus, error %s: %s", - error.name, error.message); - dbus_error_free(&error); - return; - } - - /* Acquire the org.kernel.udev service such that listeners - * know that the message is really from us and not from a - * random attacker. See the file udev_sysbus_policy.conf for - * details. - * - * Note that a service can have multiple owners (though there - * is a concept of a primary owner for reception of messages) - * so no race is introduced if two copies of udev is running - * at the same time. - */ - dbus_bus_acquire_service(sysbus_connection, "org.kernel.udev", 0, - &error); - if (dbus_error_is_set(&error)) { - printf("cannot acquire org.kernel.udev service, error %s: %s'", - error.name, error.message); - sysbus_disconnect(); - return; - } + switch (signum) { + case SIGINT: + case SIGTERM: + sysbus_disconnect(); + udevdb_exit(); + exit(20 + signum); + default: + dbg("unhandled signal"); + } } -#endif /* USE_DBUS */ - -int main(int argc, char **argv, char **envp) +static char *subsystem_blacklist[] = { + "net", + "scsi_host", + "scsi_device", + "usb_host", + "pci_bus", + "pcmcia_socket", + "" +}; + +static int udev_hotplug(void) { char *action; char *devpath; char *subsystem; int retval = -EINVAL; - - main_argv = argv; - main_envp = envp; + int i; + struct sigaction act; - dbg("version %s", UDEV_VERSION); - - if (argc != 2) { - dbg ("unknown number of arguments"); + action = get_action(); + if (!action) { + dbg("no action?"); goto exit; } - subsystem = argv[1]; - devpath = get_devpath(); if (!devpath) { - dbg ("no devpath?"); + dbg("no devpath?"); goto exit; } dbg("looking at '%s'", devpath); @@ -150,38 +106,43 @@ int main(int argc, char **argv, char **envp) goto exit; } - /* but we don't care about net class devices */ - if (strcmp(subsystem, "net") == 0) { - dbg("don't care about net devices"); + /* skip blacklisted subsystems */ + subsystem = get_subsystem(main_argv[1]); + if (!subsystem) { + dbg("no subsystem?"); goto exit; } - - action = get_action(); - if (!action) { - dbg ("no action?"); - goto exit; + 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++; } - /* initialize our configuration */ - udev_init_config(); - -#ifdef USE_DBUS - /* connect to the system message bus */ - sysbus_connect(); -#endif /* USE_DBUS */ + /* connect to the system message bus */ + sysbus_connect(); /* initialize udev database */ retval = udevdb_init(UDEVDB_DEFAULT); if (retval != 0) { dbg("unable to initialize database"); - goto exit; + goto exit_sysbus; } + /* set up a default signal handler for now */ + act.sa_handler = sig_handler; + sigemptyset (&act.sa_mask); + act.sa_flags = SA_RESTART; + 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); + retval = udev_add_device(devpath, subsystem, 0); else if (strcmp(action, "remove") == 0) retval = udev_remove_device(devpath, subsystem); @@ -192,11 +153,28 @@ int main(int argc, char **argv, char **envp) } udevdb_exit(); -#ifdef USE_DBUS - /* disconnect from the system message bus */ - sysbus_disconnect(); -#endif /* USE_DBUS */ +exit_sysbus: + /* disconnect from the system message bus */ + sysbus_disconnect(); + +exit: + if (retval > 0) + retval = 0; + + return -retval; +} + +int main(int argc, char *argv[], char *envp[]) +{ + main_argv = argv; + main_envp = envp; + + init_logging("udev"); + + /* initialize our configuration */ + udev_init_config(); + + dbg("version %s", UDEV_VERSION); -exit: - return retval; + return udev_hotplug(); }