/*
* udev-add.c
*
- * Userspace devfs
- *
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
- *
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
*
* 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
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
+#include <stddef.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
+#include <grp.h>
#include <sys/stat.h>
#include <sys/types.h>
-#include <grp.h>
-#include <net/if.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
+#include <net/if.h>
#include <linux/sockios.h>
-#include <pwd.h>
-#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
-#include "udev_utils.h"
-#include "udev_version.h"
-#include "logging.h"
-#include "namedev.h"
-#include "udev_db.h"
+#include "udev_rules.h"
#include "udev_selinux.h"
-/*
- * the major/minor of a device is stored in a file called "dev"
- * The number is stored in decimal values in the format: M:m
- */
-static int get_major_minor(struct sysfs_class_device *class_dev, struct udevice *udev)
-{
- struct sysfs_attribute *attr = NULL;
-
- attr = sysfs_get_classdev_attr(class_dev, "dev");
- if (attr == NULL)
- goto error;
- dbg("dev='%s'", attr->value);
- if (sscanf(attr->value, "%u:%u", &udev->major, &udev->minor) != 2)
- goto error;
- dbg("found major=%d, minor=%d", udev->major, udev->minor);
-
- return 0;
-error:
- return -1;
-}
-
-static int make_node(struct udevice *udev, char *file, int major, int minor, unsigned int mode, uid_t uid, gid_t gid)
+int udev_make_node(struct udevice *udev, const char *file, dev_t devt, mode_t mode, uid_t uid, gid_t gid)
{
struct stat stats;
int retval = 0;
+ if (major(devt) != 0 && strcmp(udev->dev->subsystem, "block") == 0)
+ mode |= S_IFBLK;
+ else
+ mode |= S_IFCHR;
+
if (stat(file, &stats) != 0)
goto create;
- /* preserve node with already correct numbers, to not change the inode number */
- if (((stats.st_mode & S_IFMT) == S_IFBLK || (stats.st_mode & S_IFMT) == S_IFCHR) &&
- (stats.st_rdev == makedev(major, minor))) {
- dbg("preserve file '%s', cause it has correct dev_t", file);
- selinux_setfilecon(file, udev->kernel_name, stats.st_mode);
+ /* preserve node with already correct numbers, to prevent changing the inode number */
+ if ((stats.st_mode & S_IFMT) == (mode & S_IFMT) && (stats.st_rdev == devt)) {
+ info("preserve file '%s', cause it has correct dev_t", file);
+ selinux_setfilecon(file, udev->dev->kernel_name, stats.st_mode);
goto perms;
}
if (unlink(file) != 0)
- dbg("unlink(%s) failed with error '%s'", file, strerror(errno));
+ err("unlink(%s) failed: %s", file, strerror(errno));
else
dbg("already present file '%s' unlinked", file);
create:
- selinux_setfscreatecon(file, udev->kernel_name, mode);
- retval = mknod(file, mode, makedev(major, minor));
+ selinux_setfscreatecon(file, udev->dev->kernel_name, mode);
+ retval = mknod(file, mode, devt);
+ selinux_resetfscreatecon();
if (retval != 0) {
- dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
- file, mode, major, minor, strerror(errno));
+ err("mknod(%s, %#o, %u, %u) failed: %s",
+ file, mode, major(devt), minor(devt), strerror(errno));
goto exit;
}
perms:
dbg("chmod(%s, %#o)", file, mode);
if (chmod(file, mode) != 0) {
- dbg("chmod(%s, %#o) failed with error '%s'", file, mode, strerror(errno));
+ err("chmod(%s, %#o) failed: %s", file, mode, strerror(errno));
goto exit;
}
if (uid != 0 || gid != 0) {
dbg("chown(%s, %u, %u)", file, uid, gid);
if (chown(file, uid, gid) != 0) {
- dbg("chown(%s, %u, %u) failed with error '%s'",
+ err("chown(%s, %u, %u) failed: %s",
file, uid, gid, strerror(errno));
goto exit;
}
static int create_node(struct udevice *udev)
{
- char filename[NAME_SIZE];
- char partitionname[NAME_SIZE];
- uid_t uid = 0;
- gid_t gid = 0;
- int i;
+ char filename[PATH_SIZE];
+ struct name_entry *name_loop;
+ uid_t uid;
+ gid_t gid;
int tail;
- char *pos;
- int len;
-
- snprintf(filename, NAME_SIZE, "%s/%s", udev_root, udev->name);
- filename[NAME_SIZE-1] = '\0';
-
- switch (udev->type) {
- case 'b':
- udev->mode |= S_IFBLK;
- break;
- case 'c':
- case 'u':
- udev->mode |= S_IFCHR;
- break;
- case 'p':
- udev->mode |= S_IFIFO;
- break;
- default:
- dbg("unknown node type %c\n", udev->type);
- return -EINVAL;
- }
+ int i;
+
+ snprintf(filename, sizeof(filename), "%s/%s", udev_root, udev->name);
+ filename[sizeof(filename)-1] = '\0';
/* create parent directories if needed */
- if (strrchr(udev->name, '/'))
+ if (strchr(udev->name, '/'))
create_path(filename);
- if (udev->owner[0] != '\0') {
+ if (strcmp(udev->owner, "root") == 0)
+ uid = 0;
+ else {
char *endptr;
- unsigned long id = strtoul(udev->owner, &endptr, 10);
+ unsigned long id;
+
+ id = strtoul(udev->owner, &endptr, 10);
if (endptr[0] == '\0')
uid = (uid_t) id;
- else {
- struct passwd *pw;
-
- pw = getpwnam(udev->owner);
- if (pw == NULL)
- dbg("specified user unknown '%s'", udev->owner);
- else
- uid = pw->pw_uid;
- }
+ else
+ uid = lookup_user(udev->owner);
}
- if (udev->group[0] != '\0') {
+ if (strcmp(udev->group, "root") == 0)
+ gid = 0;
+ else {
char *endptr;
- unsigned long id = strtoul(udev->group, &endptr, 10);
+ unsigned long id;
+
+ id = strtoul(udev->group, &endptr, 10);
if (endptr[0] == '\0')
gid = (gid_t) id;
- else {
- struct group *gr = getgrnam(udev->group);
- if (gr == NULL)
- dbg("specified group unknown '%s'", udev->group);
- else
- gid = gr->gr_gid;
- }
+ else
+ gid = lookup_group(udev->group);
}
- if (!udev->test_run) {
- info("creating device node '%s'", filename);
- if (make_node(udev, filename, udev->major, udev->minor, udev->mode, uid, gid) != 0)
+ info("creating device node '%s', major = '%d', minor = '%d', " "mode = '%#o', uid = '%d', gid = '%d'",
+ filename, major(udev->devt), minor(udev->devt), udev->mode, uid, gid);
+
+ if (!udev->test_run)
+ if (udev_make_node(udev, filename, udev->devt, udev->mode, uid, gid) != 0)
goto error;
- } else {
- info("creating device node '%s', major = '%d', minor = '%d', "
- "mode = '%#o', uid = '%d', gid = '%d'", filename,
- udev->major, udev->minor, udev->mode, uid, gid);
- }
+
+ setenv("DEVNAME", filename, 1);
/* create all_partitions if requested */
- if (udev->partitions > 0) {
+ if (udev->partitions) {
+ char partitionname[PATH_SIZE];
+ char *attr;
+ int range;
+
+ /* take the maximum registered minor range */
+ attr = sysfs_attr_get_value(udev->dev->devpath, "range");
+ if (attr) {
+ range = atoi(attr);
+ if (range > 1)
+ udev->partitions = range-1;
+ }
info("creating device partition nodes '%s[1-%i]'", filename, udev->partitions);
if (!udev->test_run) {
for (i = 1; i <= udev->partitions; i++) {
- strfieldcpy(partitionname, filename);
- strintcat(partitionname, i);
- make_node(udev, partitionname, udev->major, udev->minor + i, udev->mode, uid, gid);
+ dev_t part_devt;
+
+ snprintf(partitionname, sizeof(partitionname), "%s%d", filename, i);
+ partitionname[sizeof(partitionname)-1] = '\0';
+ part_devt = makedev(major(udev->devt), minor(udev->devt) + i);
+ udev_make_node(udev, partitionname, part_devt, udev->mode, uid, gid);
}
}
}
/* create symlink(s) if requested */
- foreach_strpart(udev->symlink, " ", pos, len) {
- char linkname[NAME_SIZE];
- char linktarget[NAME_SIZE];
-
- strfieldcpymax(linkname, pos, len+1);
- snprintf(filename, NAME_SIZE, "%s/%s", udev_root, linkname);
- filename[NAME_SIZE-1] = '\0';
-
- dbg("symlink '%s' to node '%s' requested", filename, udev->name);
- if (!udev->test_run)
- if (strrchr(linkname, '/'))
- create_path(filename);
-
- /* optimize relative link */
- linktarget[0] = '\0';
- i = 0;
- tail = 0;
- while ((udev->name[i] == linkname[i]) && udev->name[i]) {
- if (udev->name[i] == '/')
- tail = i+1;
- i++;
- }
- while (linkname[i] != '\0') {
- if (linkname[i] == '/')
- strfieldcat(linktarget, "../");
- i++;
- }
+ if (!list_empty(&udev->symlink_list)) {
+ char symlinks[512] = "";
+
+ list_for_each_entry(name_loop, &udev->symlink_list, node) {
+ int retval;
+ char linktarget[PATH_SIZE];
+
+ snprintf(filename, sizeof(filename), "%s/%s", udev_root, name_loop->name);
+ filename[sizeof(filename)-1] = '\0';
+
+ dbg("symlink '%s' to node '%s' requested", filename, udev->name);
+ if (!udev->test_run)
+ if (strchr(filename, '/'))
+ create_path(filename);
+
+ /* optimize relative link */
+ linktarget[0] = '\0';
+ i = 0;
+ tail = 0;
+ while (udev->name[i] && (udev->name[i] == name_loop->name[i])) {
+ if (udev->name[i] == '/')
+ tail = i+1;
+ i++;
+ }
+ while (name_loop->name[i] != '\0') {
+ if (name_loop->name[i] == '/')
+ strlcat(linktarget, "../", sizeof(linktarget));
+ i++;
+ }
- strfieldcat(linktarget, &udev->name[tail]);
+ strlcat(linktarget, &udev->name[tail], sizeof(linktarget));
+
+ info("creating symlink '%s' to '%s'", filename, linktarget);
+ if (!udev->test_run) {
+ unlink(filename);
+ selinux_setfscreatecon(filename, NULL, S_IFLNK);
+ retval = symlink(linktarget, filename);
+ selinux_resetfscreatecon();
+ if (retval != 0)
+ err("symlink(%s, %s) failed: %s",
+ linktarget, filename, strerror(errno));
+ }
- dbg("symlink(%s, %s)", linktarget, filename);
- if (!udev->test_run) {
- selinux_setfscreatecon(filename, udev->kernel_name, S_IFLNK);
- unlink(filename);
- if (symlink(linktarget, filename) != 0)
- dbg("symlink(%s, %s) failed with error '%s'",
- linktarget, filename, strerror(errno));
+ strlcat(symlinks, filename, sizeof(symlinks));
+ strlcat(symlinks, " ", sizeof(symlinks));
}
+
+ remove_trailing_chars(symlinks, ' ');
+ setenv("DEVLINKS", symlinks, 1);
}
return 0;
struct ifreq ifr;
int retval;
- dbg("changing net interface name from '%s' to '%s'", udev->kernel_name, udev->name);
+ info("changing net interface name from '%s' to '%s'", udev->dev->kernel_name, udev->name);
if (udev->test_run)
return 0;
sk = socket(PF_INET, SOCK_DGRAM, 0);
if (sk < 0) {
- dbg("error opening socket");
+ err("error opening socket: %s", strerror(errno));
return -1;
}
memset(&ifr, 0x00, sizeof(struct ifreq));
- strfieldcpy(ifr.ifr_name, udev->kernel_name);
- strfieldcpy(ifr.ifr_newname, udev->name);
+ strlcpy(ifr.ifr_name, udev->dev->kernel_name, IFNAMSIZ);
+ strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ);
retval = ioctl(sk, SIOCSIFNAME, &ifr);
if (retval != 0)
- dbg("error changing net interface name");
+ err("error changing net interface name: %s", strerror(errno));
close(sk);
return retval;
}
-int udev_add_device(struct udevice *udev, struct sysfs_class_device *class_dev)
+int udev_add_device(struct udevice *udev)
{
char *pos;
int retval = 0;
- if (udev->type == 'b' || udev->type == 'c') {
- retval = get_major_minor(class_dev, udev);
- if (retval != 0) {
- dbg("no dev-file found, do nothing");
- return 0;
- }
- }
-
- if (namedev_name_device(udev, class_dev) != 0)
- return 0;
-
dbg("adding name='%s'", udev->name);
-
selinux_init();
- if (udev->type == 'b' || udev->type == 'c') {
+ if (major(udev->devt)) {
retval = create_node(udev);
if (retval != 0)
goto exit;
if (udev_db_add_device(udev) != 0)
- dbg("udev_db_add_dev failed, but we create the node anyway, "
- "remove might not work for custom names");
-
- /* use full path to the environment */
- snprintf(udev->devname, NAME_SIZE, "%s/%s", udev_root, udev->name);
- udev->devname[NAME_SIZE-1] = '\0';
-
- } else if (udev->type == 'n') {
+ dbg("udev_db_add_dev failed, remove might not work for custom names");
+ } else if (strcmp(udev->dev->subsystem, "net") == 0) {
/* look if we want to change the name of the netif */
- if (strcmp(udev->name, udev->kernel_name) != 0) {
+ if (strcmp(udev->name, udev->dev->kernel_name) != 0) {
retval = rename_net_if(udev);
if (retval != 0)
goto exit;
+ info("renamed netif to '%s'", udev->name);
/* we've changed the name, now fake the devpath, cause the
* original kernel name sleeps with the fishes and we don't
* get an event from the kernel with the new name
*/
- pos = strrchr(udev->devpath, '/');
+ pos = strrchr(udev->dev->devpath, '/');
if (pos != NULL) {
pos[1] = '\0';
- strfieldcat(udev->devpath, udev->name);
- setenv("DEVPATH", udev->devpath, 1);
+ strlcat(udev->dev->devpath, udev->name, sizeof(udev->dev->devpath));
+ strlcpy(udev->dev->kernel_name, udev->name, sizeof(udev->dev->kernel_name));
+ setenv("DEVPATH", udev->dev->devpath, 1);
setenv("INTERFACE", udev->name, 1);
}
-
- /* use netif name for the environment */
- strfieldcpy(udev->devname, udev->name);
}
}
exit:
- selinux_restore();
-
+ selinux_exit();
return retval;
}
~ianmdlvl / elogind.git / blobdiff