/*
- * udev-add.c
+ * udev-node.c - device node handling
*
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
#include <grp.h>
#include <sys/stat.h>
#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/ioctl.h>
-#include <net/if.h>
-#include <linux/sockios.h>
#include "udev.h"
#include "udev_rules.h"
#include "udev_selinux.h"
-int udev_make_node(struct udevice *udev, const char *file, dev_t devt, mode_t mode, uid_t uid, gid_t gid)
+int udev_node_mknod(struct udevice *udev, const char *file, dev_t devt, mode_t mode, uid_t uid, gid_t gid)
{
struct stat stats;
int retval = 0;
return retval;
}
-static int create_node(struct udevice *udev)
+int udev_node_add(struct udevice *udev)
{
char filename[PATH_SIZE];
struct name_entry *name_loop;
gid_t gid;
int tail;
int i;
+ int retval = 0;
+
+ selinux_init();
snprintf(filename, sizeof(filename), "%s/%s", udev_root, udev->name);
filename[sizeof(filename)-1] = '\0';
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;
+ if (udev_node_mknod(udev, filename, udev->devt, udev->mode, uid, gid) != 0) {
+ retval = -1;
+ goto exit;
+ }
setenv("DEVNAME", filename, 1);
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);
+ udev_node_mknod(udev, partitionname, part_devt, udev->mode, uid, gid);
}
}
}
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);
if (!udev->test_run) {
unlink(filename);
selinux_setfscreatecon(filename, NULL, S_IFLNK);
- retval = symlink(linktarget, filename);
+ if (symlink(linktarget, filename) != 0)
+ err("symlink(%s, %s) failed: %s", linktarget, filename, strerror(errno));
selinux_resetfscreatecon();
- if (retval != 0)
- err("symlink(%s, %s) failed: %s",
- linktarget, filename, strerror(errno));
}
strlcat(symlinks, filename, sizeof(symlinks));
setenv("DEVLINKS", symlinks, 1);
}
- return 0;
-error:
- return -1;
+exit:
+ selinux_exit();
+ return retval;
}
-static int rename_net_if(struct udevice *udev)
+int udev_node_remove(struct udevice *udev)
{
- int sk;
- struct ifreq ifr;
+ char filename[PATH_SIZE];
+ char partitionname[PATH_SIZE];
+ struct name_entry *name_loop;
+ struct stat stats;
int retval;
+ int i;
+ int num;
- info("changing net interface name from '%s' to '%s'", udev->dev->kernel_name, udev->name);
- if (udev->test_run)
- return 0;
+ if (!list_empty(&udev->symlink_list)) {
+ char symlinks[512] = "";
- sk = socket(PF_INET, SOCK_DGRAM, 0);
- if (sk < 0) {
- err("error opening socket: %s", strerror(errno));
- return -1;
- }
+ list_for_each_entry(name_loop, &udev->symlink_list, node) {
+ snprintf(filename, sizeof(filename), "%s/%s", udev_root, name_loop->name);
+ filename[sizeof(filename)-1] = '\0';
- memset(&ifr, 0x00, sizeof(struct ifreq));
- strlcpy(ifr.ifr_name, udev->dev->kernel_name, IFNAMSIZ);
- strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ);
+ if (stat(filename, &stats) != 0) {
+ dbg("symlink '%s' not found", filename);
+ continue;
+ }
+ if (udev->devt && stats.st_rdev != udev->devt) {
+ info("symlink '%s' points to a different device, skip removal", filename);
+ continue;
+ }
- retval = ioctl(sk, SIOCSIFNAME, &ifr);
- if (retval != 0)
- err("error changing net interface name: %s", strerror(errno));
- close(sk);
+ info("removing symlink '%s'", filename);
+ unlink(filename);
- return retval;
-}
+ if (strchr(filename, '/'))
+ delete_path(filename);
-int udev_add_device(struct udevice *udev)
-{
- char *pos;
- int retval = 0;
+ strlcat(symlinks, filename, sizeof(symlinks));
+ strlcat(symlinks, " ", sizeof(symlinks));
+ }
- dbg("adding name='%s'", udev->name);
- selinux_init();
+ remove_trailing_chars(symlinks, ' ');
+ if (symlinks[0] != '\0')
+ setenv("DEVLINKS", symlinks, 1);
+ }
- if (major(udev->devt)) {
- retval = create_node(udev);
- if (retval != 0)
- goto exit;
+ snprintf(filename, sizeof(filename), "%s/%s", udev_root, udev->name);
+ filename[sizeof(filename)-1] = '\0';
- if (udev_db_add_device(udev) != 0)
- 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->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, because 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->dev->devpath, '/');
- if (pos != NULL) {
- pos[1] = '\0';
- 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);
- }
+ if (stat(filename, &stats) != 0) {
+ dbg("device node '%s' not found", filename);
+ return -1;
+ }
+ if (udev->devt && stats.st_rdev != udev->devt) {
+ info("device node '%s' points to a different device, skip removal", filename);
+ return -1;
+ }
+
+ info("removing device node '%s'", filename);
+ retval = unlink_secure(filename);
+ if (retval)
+ return retval;
+
+ setenv("DEVNAME", filename, 1);
+
+ num = udev->partitions;
+ if (num > 0) {
+ info("removing all_partitions '%s[1-%i]'", filename, num);
+ if (num > 255) {
+ info("garbage from udev database, skip all_partitions removal");
+ return -1;
+ }
+ for (i = 1; i <= num; i++) {
+ snprintf(partitionname, sizeof(partitionname), "%s%d", filename, i);
+ partitionname[sizeof(partitionname)-1] = '\0';
+ unlink_secure(partitionname);
}
}
-exit:
- selinux_exit();
+ if (strchr(udev->name, '/'))
+ delete_path(filename);
+
return retval;
}
~ianmdlvl / elogind.git / blobdiff