#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
+#include <ctype.h>
+#include <signal.h>
+#include <stdarg.h>
#include "udev.h"
#include "udev_version.h"
+#include "udev_dbus.h"
#include "namedev.h"
+#include "udevdb.h"
#include "libsysfs/libsysfs.h"
+/* global variables */
+char **main_argv;
+char **main_envp;
-static char sysfs_path[SYSFS_PATH_MAX];
+static void sig_handler(int signum)
+{
+ dbg("caught signal %d", signum);
+ switch (signum) {
+ case SIGINT:
+ case SIGTERM:
+ case SIGKILL:
+ sysbus_disconnect();
+ udevdb_exit();
+ exit(20 + signum);
+ break;
+ default:
+ dbg("unhandled signal");
+ }
+}
-static char *get_action(void)
+static inline char *get_action(void)
{
char *action;
return action;
}
-
-static char *get_device(void)
+static inline char *get_devpath(void)
{
- char *device;
+ char *devpath;
- device = getenv("DEVPATH");
- return device;
+ devpath = getenv("DEVPATH");
+ return devpath;
}
-/*
- * Right now the major/minor of a device is stored in a file called
- * "dev" in sysfs.
- * The number is stored as:
- * MMmm
- * MM is the major
- * mm is the minor
- * The value is in hex.
- * Yes, this will probably change when we go to a bigger major/minor
- * range, and will have to be changed at that time.
- */
-static int get_major_minor(struct sysfs_class_device *class_dev, int *major, int *minor)
+static inline char *get_seqnum(void)
{
- char temp[3];
- int retval = 0;
-
- char *dev;
-
- dev = sysfs_get_value_from_attributes(class_dev->directory->attributes, "dev");
- if (dev == NULL)
- return -ENODEV;
-
- dbg("dev = %s", dev);
-
- temp[0] = dev[0];
- temp[1] = dev[1];
- temp[2] = 0x00;
- *major = (int)strtol(&temp[0], NULL, 16);
+ char *seqnum;
- temp[0] = dev[2];
- temp[1] = dev[3];
- temp[2] = 0x00;
- *minor = (int)strtol(&temp[0], NULL, 16);
-
- dbg("found major = %d, minor = %d", *major, *minor);
-
- retval = 0;
- return retval;
+ seqnum = getenv("SEQNUM");
+ return seqnum;
}
-/*
- * Here would go a call to the naming deamon, to get the name we want to have
- * for this device. But for now, let's just default to whatever the kernel is
- * calling the device as that will keep the "old-style" naming policy
- */
-static char *get_name(char *dev, int major, int minor)
+static void print_record(char *path, struct udevice *dev)
{
- static char name[100];
- char *temp;
-
- temp = strrchr(dev, '/');
- if (temp == NULL)
- return NULL;
- strncpy(name, &temp[1], sizeof(name));
-
- dbg("name is %s", name);
-
- return &name[0];
+ printf("P: %s\n", path);
+ printf("N: %s\n", dev->name);
+ printf("S: %s\n", dev->symlink);
+ printf("O: %s\n", dev->owner);
+ printf("G: %s\n\n", dev->group);
}
-/*
- * We also want to add some permissions here, and possibly some symlinks
- */
-static int create_node(char *name, char type, int major, int minor, int mode)
-{
- char *argv[7];
- char mode_string[100];
- char type_string[3];
- char major_string[20];
- char minor_string[20];
- char filename[255];
- int retval = 0;
-
- strncpy(filename, UDEV_ROOT, sizeof(filename));
- strncat(filename, name, sizeof(filename));
-
- snprintf(mode_string, sizeof(mode_string), "--mode=%#o", mode);
- snprintf(type_string, sizeof(type_string), "%c", type);
- snprintf(major_string, sizeof(major_string), "%d", major);
- snprintf(minor_string, sizeof(minor_string), "%d", minor);
-
- argv[0] = MKNOD;
- argv[1] = mode_string;
- argv[2] = filename;
- argv[3] = type_string;
- argv[4] = major_string;
- argv[5] = minor_string;
- argv[6] = NULL;
- dbg ("executing %s %s %s %s %s %s",
- argv[0], argv[1], argv[2], argv[3], argv[4], argv[5]);
- switch (fork()) {
- case 0:
- /* we are the child, so lets run the program */
- execv (MKNOD, argv);
- exit(0);
- break;
- case (-1):
- dbg ("fork failed.");
- retval = -EFAULT;
- break;
- default:
- break;
- }
- return retval;
-}
+enum query_type {
+ NONE,
+ NAME,
+ SYMLINK,
+ OWNER,
+ GROUP
+};
-/*
- * We also want to clean up any symlinks that were created in create_node()
- */
-static int delete_node(char *name)
+static inline int udev_user(int argc, char **argv)
{
- char filename[255];
-
- strncpy(filename, UDEV_ROOT, sizeof(filename));
- strncat(filename, name, sizeof(filename));
+ static const char short_options[] = "dp:q:rVh";
+ int option;
+ int retval = -EINVAL;
+ struct udevice dev;
+ int root = 0;
+ enum query_type query = NONE;
+ char result[NAME_SIZE] = "";
+ char path[NAME_SIZE] = "";
+
+ /* get command line options */
+ while (1) {
+ option = getopt(argc, argv, short_options);
+ if (option == -1)
+ break;
- dbg("unlinking %s", filename);
- return unlink(filename);
-}
+ dbg("option '%c'", option);
+ switch (option) {
+ case 'p':
+ dbg("udev path: %s\n", optarg);
+ strfieldcpy(path, optarg);
+ break;
-struct sysfs_class_device *get_class_dev(char *device_name)
-{
- char dev_path[SYSFS_PATH_MAX];
- struct sysfs_class_device *class_dev;
+ case 'q':
+ dbg("udev query: %s\n", optarg);
- strcpy(dev_path, sysfs_path);
- strcat(dev_path, device_name);
+ if (strcmp(optarg, "name") == 0) {
+ query = NAME;
+ break;
+ }
- dbg("looking at %s", dev_path);
+ if (strcmp(optarg, "symlink") == 0) {
+ query = SYMLINK;
+ break;
+ }
- /* open up the sysfs class device for this thing... */
- class_dev = sysfs_open_class_device(dev_path);
- if (class_dev == NULL) {
- dbg ("sysfs_open_class_device failed");
- return NULL;
- }
- dbg("class_dev->name = %s", class_dev->name);
+ if (strcmp(optarg, "owner") == 0) {
+ query = OWNER;
+ break;
+ }
- return class_dev;
-}
+ if (strcmp(optarg, "group") == 0) {
+ query = GROUP;
+ break;
+ }
-static int add_device(char *device, char *subsystem)
-{
- struct sysfs_class_device *class_dev;
- struct device_attr attr;
- //char *name;
- int major;
- int minor;
- char type;
- //int mode;
- int retval = -EINVAL;
+ printf("unknown query type\n");
+ return -EINVAL;
- /* for now, the block layer is the only place where block devices are */
- if (strcmp(subsystem, "block") == 0)
- type = 'b';
- else
- type = 'c';
+ case 'r':
+ root = 1;
+ break;
- class_dev = get_class_dev(device);
- if (class_dev == NULL)
- goto exit;
+ case 'd':
+ retval = udevdb_open_ro();
+ if (retval != 0) {
+ printf("unable to open udev database\n");
+ return -EACCES;
+ }
+ retval = udevdb_dump(print_record);
+ udevdb_exit();
+ return retval;
+
+ case 'V':
+ printf("udev, version %s\n", UDEV_VERSION);
+ return 0;
+
+ case 'h':
+ retval = 0;
+ case '?':
+ default:
+ goto help;
+ }
+ }
- retval = namedev_name_device(class_dev, &attr);
- if (retval)
+ /* process options */
+ if (query != NONE) {
+ if (path[0] == '\0') {
+ printf("query needs device path specified\n");
+ return -EINVAL;
+ }
+
+ retval = udevdb_open_ro();
+ if (retval != 0) {
+ printf("unable to open udev database\n");
+ return -EACCES;
+ }
+ retval = udevdb_get_dev(path, &dev);
+ if (retval == 0) {
+ switch(query) {
+ case NAME:
+ if (root)
+ strfieldcpy(result, udev_root);
+ strncat(result, dev.name, sizeof(result));
+ break;
+
+ case SYMLINK:
+ strfieldcpy(result, dev.symlink);
+ break;
+
+ case GROUP:
+ strfieldcpy(result, dev.group);
+ break;
+
+ case OWNER:
+ strfieldcpy(result, dev.owner);
+ break;
+
+ default:
+ break;
+ }
+ printf("%s\n", result);
+ } else {
+ printf("device not found in udev database\n");
+ }
+ udevdb_exit();
return retval;
-
- retval = get_major_minor(class_dev, &major, &minor);
- if (retval) {
- dbg ("get_major_minor failed");
- goto exit;
}
- sysfs_close_class_device(class_dev);
-
- return create_node(attr.name, type, major, minor, attr.mode);
-
-exit:
- return retval;
-}
-
-static int remove_device(char *device)
-{
- char *name;
- int retval = 0;
-
- name = get_name(device, 0, 0);
- if (name == NULL) {
- dbg ("get_name failed");
- retval = -ENODEV;
- goto exit;
+ if (root) {
+ printf("%s\n", udev_root);
+ return 0;
}
- return delete_node(name);
-
-exit:
+help:
+ printf("Usage: [-pqrdVh]\n"
+ " -q TYPE query database for the specified value:\n"
+ " 'name' name of device node\n"
+ " 'symlink' pointing to node\n"
+ " 'owner' of node\n"
+ " 'group' of node\n"
+ " -p PATH sysfs device path used for query\n"
+ " -r print udev root\n"
+ " -d dump whole database\n"
+ " -V print udev version\n"
+ " -h print this help text\n"
+ "\n");
return retval;
}
-
-static int udev_init(void)
-{
- int retval;
- retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
- dbg("sysfs_path = %s", sysfs_path);
- return retval;
-}
+static char *subsystem_blacklist[] = {
+ "net",
+ "scsi_host",
+ "scsi_device",
+ "",
+};
-int main(int argc, char *argv[])
+static inline int udev_hotplug(int argc, char **argv)
{
char *action;
- char *device;
+ char *devpath;
+ char *subsystem;
int retval = -EINVAL;
-
- if (argc != 2) {
- dbg ("unknown number of arguments");
- goto exit;
- }
+ int i;
- device = get_device();
- if (!device) {
- dbg ("no device?");
+ subsystem = argv[1];
+
+ devpath = get_devpath();
+ if (!devpath) {
+ dbg ("no devpath?");
goto exit;
}
- dbg("looking at %s", device);
+ dbg("looking at '%s'", devpath);
/* we only care about class devices and block stuff */
- if (!strstr(device, "class") &&
- !strstr(device, "block")) {
- dbg("not block or class");
+ if (!strstr(devpath, "class") &&
+ !strstr(devpath, "block")) {
+ dbg("not a block or class device");
goto exit;
}
-
- /* sleep for a second or two to give the kernel a chance to
- * create the dev file
- */
- sleep(1);
- udev_init();
- namedev_init();
+ /* 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) {
goto exit;
}
+ /* 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_sysbus;
+ }
+
+ /* set up a default signal handler for now */
+ signal(SIGINT, sig_handler);
+ signal(SIGTERM, sig_handler);
+ signal(SIGKILL, sig_handler);
+
+ /* initialize the naming deamon */
+ namedev_init();
+
if (strcmp(action, "add") == 0)
- return add_device(device, argv[1]);
+ retval = udev_add_device(devpath, subsystem);
+
+ else if (strcmp(action, "remove") == 0)
+ retval = udev_remove_device(devpath, subsystem);
- if (strcmp(action, "remove") == 0)
- return remove_device(device);
+ else {
+ dbg("unknown action '%s'", action);
+ retval = -EINVAL;
+ }
+ udevdb_exit();
- dbg("Unknown action: %s", action);
- return -EINVAL;
+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)
+{
+ int retval;
+ main_argv = argv;
+ main_envp = envp;
+
+ 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);
+ }
- retval = 0;
-exit:
return retval;
}
+
~ianmdlvl / elogind.git / blobdiff