summaryrefslogtreecommitdiff
path: root/src/basic/smack-util.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/basic/smack-util.c')
-rw-r--r--src/basic/smack-util.c241
1 files changed, 0 insertions, 241 deletions
diff --git a/src/basic/smack-util.c b/src/basic/smack-util.c
deleted file mode 100644
index 3a3df987df..0000000000
--- a/src/basic/smack-util.c
+++ /dev/null
@@ -1,241 +0,0 @@
-/***
- This file is part of systemd.
-
- Copyright 2013 Intel Corporation
-
- Author: Auke Kok <auke-jan.h.kok@intel.com>
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <errno.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/xattr.h>
-#include <unistd.h>
-
-#include "alloc-util.h"
-#include "fileio.h"
-#include "log.h"
-#include "macro.h"
-#include "path-util.h"
-#include "process-util.h"
-#include "smack-util.h"
-#include "string-table.h"
-#include "xattr-util.h"
-
-#ifdef HAVE_SMACK
-bool mac_smack_use(void) {
- static int cached_use = -1;
-
- if (cached_use < 0)
- cached_use = access("/sys/fs/smackfs/", F_OK) >= 0;
-
- return cached_use;
-}
-
-static const char* const smack_attr_table[_SMACK_ATTR_MAX] = {
- [SMACK_ATTR_ACCESS] = "security.SMACK64",
- [SMACK_ATTR_EXEC] = "security.SMACK64EXEC",
- [SMACK_ATTR_MMAP] = "security.SMACK64MMAP",
- [SMACK_ATTR_TRANSMUTE] = "security.SMACK64TRANSMUTE",
- [SMACK_ATTR_IPIN] = "security.SMACK64IPIN",
- [SMACK_ATTR_IPOUT] = "security.SMACK64IPOUT",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(smack_attr, SmackAttr);
-
-int mac_smack_read(const char *path, SmackAttr attr, char **label) {
- assert(path);
- assert(attr >= 0 && attr < _SMACK_ATTR_MAX);
- assert(label);
-
- if (!mac_smack_use())
- return 0;
-
- return getxattr_malloc(path, smack_attr_to_string(attr), label, true);
-}
-
-int mac_smack_read_fd(int fd, SmackAttr attr, char **label) {
- assert(fd >= 0);
- assert(attr >= 0 && attr < _SMACK_ATTR_MAX);
- assert(label);
-
- if (!mac_smack_use())
- return 0;
-
- return fgetxattr_malloc(fd, smack_attr_to_string(attr), label);
-}
-
-int mac_smack_apply(const char *path, SmackAttr attr, const char *label) {
- int r;
-
- assert(path);
- assert(attr >= 0 && attr < _SMACK_ATTR_MAX);
-
- if (!mac_smack_use())
- return 0;
-
- if (label)
- r = lsetxattr(path, smack_attr_to_string(attr), label, strlen(label), 0);
- else
- r = lremovexattr(path, smack_attr_to_string(attr));
- if (r < 0)
- return -errno;
-
- return 0;
-}
-
-int mac_smack_apply_fd(int fd, SmackAttr attr, const char *label) {
- int r;
-
- assert(fd >= 0);
- assert(attr >= 0 && attr < _SMACK_ATTR_MAX);
-
- if (!mac_smack_use())
- return 0;
-
- if (label)
- r = fsetxattr(fd, smack_attr_to_string(attr), label, strlen(label), 0);
- else
- r = fremovexattr(fd, smack_attr_to_string(attr));
- if (r < 0)
- return -errno;
-
- return 0;
-}
-
-int mac_smack_apply_pid(pid_t pid, const char *label) {
- const char *p;
- int r = 0;
-
- assert(label);
-
- if (!mac_smack_use())
- return 0;
-
- p = procfs_file_alloca(pid, "attr/current");
- r = write_string_file(p, label, 0);
- if (r < 0)
- return r;
-
- return r;
-}
-
-int mac_smack_fix(const char *path, bool ignore_enoent, bool ignore_erofs) {
- struct stat st;
- int r = 0;
-
- assert(path);
-
- if (!mac_smack_use())
- return 0;
-
- /*
- * Path must be in /dev and must exist
- */
- if (!path_startswith(path, "/dev"))
- return 0;
-
- r = lstat(path, &st);
- if (r >= 0) {
- const char *label;
-
- /*
- * Label directories and character devices "*".
- * Label symlinks "_".
- * Don't change anything else.
- */
-
- if (S_ISDIR(st.st_mode))
- label = SMACK_STAR_LABEL;
- else if (S_ISLNK(st.st_mode))
- label = SMACK_FLOOR_LABEL;
- else if (S_ISCHR(st.st_mode))
- label = SMACK_STAR_LABEL;
- else
- return 0;
-
- r = lsetxattr(path, "security.SMACK64", label, strlen(label), 0);
-
- /* If the FS doesn't support labels, then exit without warning */
- if (r < 0 && errno == EOPNOTSUPP)
- return 0;
- }
-
- if (r < 0) {
- /* Ignore ENOENT in some cases */
- if (ignore_enoent && errno == ENOENT)
- return 0;
-
- if (ignore_erofs && errno == EROFS)
- return 0;
-
- r = log_debug_errno(errno, "Unable to fix SMACK label of %s: %m", path);
- }
-
- return r;
-}
-
-int mac_smack_copy(const char *dest, const char *src) {
- int r = 0;
- _cleanup_free_ char *label = NULL;
-
- assert(dest);
- assert(src);
-
- r = mac_smack_read(src, SMACK_ATTR_ACCESS, &label);
- if (r < 0)
- return r;
-
- r = mac_smack_apply(dest, SMACK_ATTR_ACCESS, label);
- if (r < 0)
- return r;
-
- return r;
-}
-
-#else
-bool mac_smack_use(void) {
- return false;
-}
-
-int mac_smack_read(const char *path, SmackAttr attr, char **label) {
- return -EOPNOTSUPP;
-}
-
-int mac_smack_read_fd(int fd, SmackAttr attr, char **label) {
- return -EOPNOTSUPP;
-}
-
-int mac_smack_apply(const char *path, SmackAttr attr, const char *label) {
- return 0;
-}
-
-int mac_smack_apply_fd(int fd, SmackAttr attr, const char *label) {
- return 0;
-}
-
-int mac_smack_apply_pid(pid_t pid, const char *label) {
- return 0;
-}
-
-int mac_smack_fix(const char *path, bool ignore_enoent, bool ignore_erofs) {
- return 0;
-}
-
-int mac_smack_copy(const char *dest, const char *src) {
- return 0;
-}
-#endif
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-18 22:52:17 +0000