X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udev.c;h=a41f22277880be604ab4beef193847373110bbd0;hb=2092fbcdebf5313f29b43bdaa57a22baf0c0269f;hp=4c67477c202882b6814e97c83005d822053080b8;hpb=8202eb32b97a236dac725bfe24e390840ded7098;p=elogind.git diff --git a/udev.c b/udev.c index 4c67477c2..a41f22277 100644 --- a/udev.c +++ b/udev.c @@ -20,165 +20,169 @@ * */ +#include +#include #include #include -#include -#include #include +#include #include +#include +#include "libsysfs/sysfs/libsysfs.h" #include "udev.h" +#include "udev_lib.h" +#include "udev_sysfs.h" #include "udev_version.h" -#include "udev_dbus.h" -#include "logging.h" #include "namedev.h" -#include "udevdb.h" -#include "libsysfs/libsysfs.h" +#include "logging.h" + -/* global variables */ -char **main_argv; -char **main_envp; +#ifdef LOG +unsigned char logname[LOGNAME_SIZE]; +void log_message(int level, const char *format, ...) +{ + va_list args; + + if (!udev_log) + return; + + va_start(args, format); + vsyslog(level, 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) -{ - char *action; - - action = getenv("ACTION"); - return action; -} - -static inline char *get_devpath(void) +int main(int argc, char *argv[], char *envp[]) { - char *devpath; - - devpath = getenv("DEVPATH"); - return devpath; -} + struct sigaction act; + struct sysfs_class_device *class_dev; + struct udevice udev; + char path[SYSFS_PATH_MAX]; + int retval = -EINVAL; + enum { + ADD, + REMOVE, + UDEVSTART, + } act_type; -static inline char *get_seqnum(void) -{ - char *seqnum; + dbg("version %s", UDEV_VERSION); + logging_init("udev"); + udev_init_config(); - seqnum = getenv("SEQNUM"); - return seqnum; -} + if (strstr(argv[0], "udevstart") || (argv[1] != NULL && strstr(argv[1], "udevstart"))) { + act_type = UDEVSTART; + } else { + const char *action = getenv("ACTION"); + const char *devpath = getenv("DEVPATH"); + const char *subsystem = argv[1]; -static char *subsystem_blacklist[] = { - "net", - "scsi_host", - "scsi_device", - "usb_host", - "pci_bus", - "", -}; + 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("no action '%s' for us", action); + goto exit; + } -static int udev_hotplug(int argc, char **argv) -{ - char *action; - char *devpath; - char *subsystem; - int retval = -EINVAL; - int i; + if (!devpath) { + dbg("no devpath?"); + goto exit; + } + dbg("looking at '%s'", devpath); - action = get_action(); - if (!action) { - dbg ("no action?"); - goto exit; - } + /* 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; + } - devpath = get_devpath(); - if (!devpath) { - dbg ("no devpath?"); - goto exit; - } - dbg("looking at '%s'", devpath); + if (!subsystem) { + dbg("no subsystem"); + goto exit; + } - /* 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; - } + udev_set_values(&udev, devpath, subsystem, action); - /* skip blacklisted subsystems */ - subsystem = argv[1]; - i = 0; - while (subsystem_blacklist[i][0] != '\0') { - if (strcmp(subsystem, subsystem_blacklist[i]) == 0) { + /* skip blacklisted subsystems */ + if (udev.type != 'n' && subsystem_expect_no_dev(subsystem)) { dbg("don't care about '%s' devices", subsystem); goto exit; - } - i++; - } + }; - /* connect to the system message bus */ - sysbus_connect(); + } - /* initialize our configuration */ - udev_init_config(); + /* set signal handlers */ + act.sa_handler = (void (*) (int))sig_handler; + sigemptyset (&act.sa_mask); + act.sa_flags = 0; + /* alarm must not restart syscalls*/ + sigaction(SIGALRM, &act, NULL); + sigaction(SIGINT, &act, NULL); + sigaction(SIGTERM, &act, NULL); + + /* trigger timout to interrupt blocking syscalls */ + alarm(ALARM_TIMEOUT); + + switch(act_type) { + case UDEVSTART: + dbg("udevstart"); + namedev_init(); + retval = udev_start(); + break; + case ADD: + dbg("udev add"); + + /* open the device */ + snprintf(path, SYSFS_PATH_MAX, "%s%s", sysfs_path, udev.devpath); + class_dev = sysfs_open_class_device_path(path); + if (class_dev == NULL) { + dbg ("sysfs_open_class_device_path failed"); + break; + } + dbg("opened class_dev->name='%s'", class_dev->name); - /* initialize udev database */ - retval = udevdb_init(UDEVDB_DEFAULT); - if (retval != 0) { - dbg("unable to initialize database"); - goto exit_sysbus; - } + /* init rules */ + namedev_init(); - /* set up a default signal handler for now */ - signal(SIGINT, sig_handler); - signal(SIGTERM, sig_handler); - signal(SIGKILL, sig_handler); + /* name, create node, store in db */ + retval = udev_add_device(&udev, class_dev); - /* initialize the naming deamon */ - namedev_init(); + /* run dev.d/ scripts if we created a node or changed a netif name */ + if (udev.devname[0] != '\0') { + setenv("DEVNAME", udev.devname, 1); + dev_d_execute(&udev, DEVD_DIR, DEVD_SUFFIX); + } - if (strcmp(action, "add") == 0) - retval = udev_add_device(devpath, subsystem); + sysfs_close_class_device(class_dev); + break; + case REMOVE: + dbg("udev remove"); - else if (strcmp(action, "remove") == 0) - retval = udev_remove_device(devpath, subsystem); + /* get node from db, delete it*/ + retval = udev_remove_device(&udev); - else { - dbg("unknown action '%s'", action); - retval = -EINVAL; + /* run scripts */ + dev_d_execute(&udev, DEVD_DIR, DEVD_SUFFIX); } - udevdb_exit(); - -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; - - dbg("version %s", UDEV_VERSION); - - return udev_hotplug(argc, argv); + logging_close(); + return retval; } - -