/*
- * Copyright (C) 2003-2010 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2003-2013 Kay Sievers <kay@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
#include <sys/types.h>
#include "udev.h"
+#include "smack-util.h"
-#define TMP_FILE_EXT ".udev-tmp"
-
-static int node_symlink(struct udev *udev, const char *node, const char *slink)
+static int node_symlink(struct udev_device *dev, const char *node, const char *slink)
{
struct stat stats;
char target[UTIL_PATH_SIZE];
char *s;
size_t l;
- char slink_tmp[UTIL_PATH_SIZE + sizeof(TMP_FILE_EXT)];
+ char slink_tmp[UTIL_PATH_SIZE + 32];
int i = 0;
int tail = 0;
int err = 0;
l = sizeof(target);
while (slink[i] != '\0') {
if (slink[i] == '/')
- l = util_strpcpy(&s, l, "../");
+ l = strpcpy(&s, l, "../");
i++;
}
- l = util_strscpy(s, l, &node[tail]);
+ l = strscpy(s, l, &node[tail]);
if (l == 0) {
err = -EINVAL;
goto exit;
/* preserve link with correct target, do not replace node of other device */
if (lstat(slink, &stats) == 0) {
if (S_ISBLK(stats.st_mode) || S_ISCHR(stats.st_mode)) {
- log_error("conflicting device node '%s' found, link to '%s' will not be created\n", slink, node);
+ log_error("conflicting device node '%s' found, link to '%s' will not be created", slink, node);
goto exit;
} else if (S_ISLNK(stats.st_mode)) {
char buf[UTIL_PATH_SIZE];
len = readlink(slink, buf, sizeof(buf));
if (len > 0 && len < (int)sizeof(buf)) {
buf[len] = '\0';
- if (strcmp(target, buf) == 0) {
- log_debug("preserve already existing symlink '%s' to '%s'\n", slink, target);
+ if (streq(target, buf)) {
+ log_debug("preserve already existing symlink '%s' to '%s'", slink, target);
label_fix(slink, true, false);
utimensat(AT_FDCWD, slink, NULL, AT_SYMLINK_NOFOLLOW);
goto exit;
}
}
} else {
- log_debug("creating symlink '%s' to '%s'\n", slink, target);
+ log_debug("creating symlink '%s' to '%s'", slink, target);
do {
err = mkdir_parents_label(slink, 0755);
if (err != 0 && err != -ENOENT)
goto exit;
}
- log_debug("atomically replace '%s'\n", slink);
- util_strscpyl(slink_tmp, sizeof(slink_tmp), slink, TMP_FILE_EXT, NULL);
+ log_debug("atomically replace '%s'", slink);
+ strscpyl(slink_tmp, sizeof(slink_tmp), slink, ".tmp-", udev_device_get_id_filename(dev), NULL);
unlink(slink_tmp);
do {
err = mkdir_parents_label(slink_tmp, 0755);
label_context_clear();
} while (err == -ENOENT);
if (err != 0) {
- log_error("symlink '%s' '%s' failed: %m\n", target, slink_tmp);
+ log_error("symlink '%s' '%s' failed: %m", target, slink_tmp);
goto exit;
}
err = rename(slink_tmp, slink);
if (err != 0) {
- log_error("rename '%s' '%s' failed: %m\n", slink_tmp, slink);
+ log_error("rename '%s' '%s' failed: %m", slink_tmp, slink);
unlink(slink_tmp);
}
exit:
if (add) {
priority = udev_device_get_devlink_priority(dev);
- util_strscpy(buf, bufsize, udev_device_get_devnode(dev));
+ strscpy(buf, bufsize, udev_device_get_devnode(dev));
target = buf;
}
if (dent->d_name[0] == '.')
continue;
- log_debug("found '%s' claiming '%s'\n", dent->d_name, stackdir);
+ log_debug("found '%s' claiming '%s'", dent->d_name, stackdir);
/* did we find ourself? */
- if (strcmp(dent->d_name, udev_device_get_id_filename(dev)) == 0)
+ if (streq(dent->d_name, udev_device_get_id_filename(dev)))
continue;
dev_db = udev_device_new_from_device_id(udev, dent->d_name);
devnode = udev_device_get_devnode(dev_db);
if (devnode != NULL) {
if (target == NULL || udev_device_get_devlink_priority(dev_db) > priority) {
- log_debug("'%s' claims priority %i for '%s'\n",
+ log_debug("'%s' claims priority %i for '%s'",
udev_device_get_syspath(dev_db), udev_device_get_devlink_priority(dev_db), stackdir);
priority = udev_device_get_devlink_priority(dev_db);
- util_strscpy(buf, bufsize, devnode);
+ strscpy(buf, bufsize, devnode);
target = buf;
}
}
char buf[UTIL_PATH_SIZE];
util_path_encode(slink + strlen("/dev"), name_enc, sizeof(name_enc));
- util_strscpyl(dirname, sizeof(dirname), "/run/udev/links/", name_enc, NULL);
- util_strscpyl(filename, sizeof(filename), dirname, "/", udev_device_get_id_filename(dev), NULL);
+ strscpyl(dirname, sizeof(dirname), "/run/udev/links/", name_enc, NULL);
+ strscpyl(filename, sizeof(filename), dirname, "/", udev_device_get_id_filename(dev), NULL);
if (!add && unlink(filename) == 0)
rmdir(dirname);
target = link_find_prioritized(dev, add, dirname, buf, sizeof(buf));
if (target == NULL) {
- log_debug("no reference left, remove '%s'\n", slink);
+ log_debug("no reference left, remove '%s'", slink);
if (unlink(slink) == 0)
util_delete_path(udev, slink);
} else {
- log_debug("creating link '%s' to '%s'\n", slink, target);
- node_symlink(udev, target, slink);
+ log_debug("creating link '%s' to '%s'", slink, target);
+ node_symlink(dev, target, slink);
}
if (add) {
udev_list_entry_foreach(list_entry_current, udev_device_get_devlinks_list_entry(dev)) {
const char *name_current = udev_list_entry_get_name(list_entry_current);
- if (strcmp(name, name_current) == 0) {
+ if (streq(name, name_current)) {
found = 1;
break;
}
if (found)
continue;
- log_debug("update old name, '%s' no longer belonging to '%s'\n",
+ log_debug("update old name, '%s' no longer belonging to '%s'",
name, udev_device_get_devpath(dev));
link_update(dev, name, false);
}
}
-static int node_fixup(struct udev_device *dev, mode_t mode, uid_t uid, gid_t gid)
-{
+static int node_permissions_apply(struct udev_device *dev, bool apply,
+ mode_t mode, uid_t uid, gid_t gid,
+ struct udev_list *seclabel_list) {
const char *devnode = udev_device_get_devnode(dev);
dev_t devnum = udev_device_get_devnum(dev);
struct stat stats;
+ struct udev_list_entry *entry;
int err = 0;
- if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
+ if (streq(udev_device_get_subsystem(dev), "block"))
mode |= S_IFBLK;
else
mode |= S_IFCHR;
if (lstat(devnode, &stats) != 0) {
err = -errno;
- log_debug("can not stat() node '%s' (%m)\n", devnode);
+ log_debug("can not stat() node '%s' (%m)", devnode);
goto out;
}
if (((stats.st_mode & S_IFMT) != (mode & S_IFMT)) || (stats.st_rdev != devnum)) {
err = -EEXIST;
- log_debug("found node '%s' with non-matching devnum %s, skip handling\n",
+ log_debug("found node '%s' with non-matching devnum %s, skip handling",
udev_device_get_devnode(dev), udev_device_get_id_filename(dev));
goto out;
}
- if ((stats.st_mode & 0777) != (mode & 0777) || stats.st_uid != uid || stats.st_gid != gid) {
- log_debug("set permissions %s, %#o, uid=%u, gid=%u\n", devnode, mode, uid, gid);
- chmod(devnode, mode);
- chown(devnode, uid, gid);
- } else {
- log_debug("preserve permissions %s, %#o, uid=%u, gid=%u\n", devnode, mode, uid, gid);
- }
+ if (apply) {
+ bool selinux = false;
+ bool smack = false;
- /*
- * Set initial selinux file context only on add events.
- * We set the proper context on bootup (triger) or for newly
- * added devices, but we don't change it later, in case
- * something else has set a custom context in the meantime.
- */
- if (strcmp(udev_device_get_action(dev), "add") == 0)
- label_fix(devnode, true, false);
+ if ((stats.st_mode & 0777) != (mode & 0777) || stats.st_uid != uid || stats.st_gid != gid) {
+ log_debug("set permissions %s, %#o, uid=%u, gid=%u", devnode, mode, uid, gid);
+ chmod(devnode, mode);
+ chown(devnode, uid, gid);
+ } else {
+ log_debug("preserve permissions %s, %#o, uid=%u, gid=%u", devnode, mode, uid, gid);
+ }
+
+ /* apply SECLABEL{$module}=$label */
+ udev_list_entry_foreach(entry, udev_list_get_entry(seclabel_list)) {
+ const char *name, *label;
+
+ name = udev_list_entry_get_name(entry);
+ label = udev_list_entry_get_value(entry);
+
+ if (streq(name, "selinux")) {
+ selinux = true;
+ if (label_apply(devnode, label) < 0)
+ log_error("SECLABEL: failed to set SELinux label '%s'", label);
+ else
+ log_debug("SECLABEL: set SELinux label '%s'", label);
+
+ } else if (streq(name, "smack")) {
+ smack = true;
+ if (smack_label_path(devnode, label) < 0)
+ log_error("SECLABEL: failed to set SMACK label '%s'", label);
+ else
+ log_debug("SECLABEL: set SMACK label '%s'", label);
+
+ } else
+ log_error("SECLABEL: unknown subsystem, ignoring '%s'='%s'", name, label);
+ }
+
+ /* set the defaults */
+ if (!selinux)
+ label_fix(devnode, true, false);
+ if (!smack)
+ smack_label_path(devnode, NULL);
+ }
/* always update timestamp when we re-use the node, like on media change events */
utimensat(AT_FDCWD, devnode, NULL, 0);
return err;
}
-void udev_node_add(struct udev_device *dev, mode_t mode, uid_t uid, gid_t gid)
-{
- struct udev *udev = udev_device_get_udev(dev);
+void udev_node_add(struct udev_device *dev, bool apply,
+ mode_t mode, uid_t uid, gid_t gid,
+ struct udev_list *seclabel_list) {
char filename[UTIL_PATH_SIZE];
struct udev_list_entry *list_entry;
- log_debug("handling device node '%s', devnum=%s, mode=%#o, uid=%d, gid=%d\n",
+ log_debug("handling device node '%s', devnum=%s, mode=%#o, uid=%d, gid=%d",
udev_device_get_devnode(dev), udev_device_get_id_filename(dev), mode, uid, gid);
- if (node_fixup(dev, mode, uid, gid) < 0)
+ if (node_permissions_apply(dev, apply, mode, uid, gid, seclabel_list) < 0)
return;
/* always add /dev/{block,char}/$major:$minor */
snprintf(filename, sizeof(filename), "/dev/%s/%u:%u",
- strcmp(udev_device_get_subsystem(dev), "block") == 0 ? "block" : "char",
+ streq(udev_device_get_subsystem(dev), "block") ? "block" : "char",
major(udev_device_get_devnum(dev)), minor(udev_device_get_devnum(dev)));
- node_symlink(udev, udev_device_get_devnode(dev), filename);
+ node_symlink(dev, udev_device_get_devnode(dev), filename);
/* create/update symlinks, add symlinks to name index */
udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(dev))
/* remove /dev/{block,char}/$major:$minor */
snprintf(filename, sizeof(filename), "/dev/%s/%u:%u",
- strcmp(udev_device_get_subsystem(dev), "block") == 0 ? "block" : "char",
+ streq(udev_device_get_subsystem(dev), "block") ? "block" : "char",
major(udev_device_get_devnum(dev)), minor(udev_device_get_devnum(dev)));
unlink(filename);
}
~ianmdlvl / elogind.git / blobdiff