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-rw-r--r--src/basic/smack-util.c117
1 files changed, 63 insertions, 54 deletions
diff --git a/src/basic/smack-util.c b/src/basic/smack-util.c
index 047aa294f4..6d5c205117 100644
--- a/src/basic/smack-util.c
+++ b/src/basic/smack-util.c
@@ -32,109 +32,93 @@
#define SMACK_FLOOR_LABEL "_"
#define SMACK_STAR_LABEL "*"
-bool mac_smack_use(void) {
#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;
-#else
- return false;
-#endif
}
-int mac_smack_apply(const char *path, const char *label) {
- int r = 0;
+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);
-#ifdef HAVE_SMACK
if (!mac_smack_use())
return 0;
- if (label)
- r = lsetxattr(path, "security.SMACK64", label, strlen(label), 0);
- else
- r = lremovexattr(path, "security.SMACK64");
- if (r < 0)
- return -errno;
-#endif
-
- return r;
+ return getxattr_malloc(path, smack_attr_to_string(attr), label, true);
}
-int mac_smack_apply_fd(int fd, const char *label) {
- int r = 0;
-
+int mac_smack_read_fd(int fd, SmackAttr attr, char **label) {
assert(fd >= 0);
+ assert(attr >= 0 && attr < _SMACK_ATTR_MAX);
+ assert(label);
-#ifdef HAVE_SMACK
if (!mac_smack_use())
return 0;
- if (label)
- r = fsetxattr(fd, "security.SMACK64", label, strlen(label), 0);
- else
- r = fremovexattr(fd, "security.SMACK64");
- if (r < 0)
- return -errno;
-#endif
-
- return r;
+ return fgetxattr_malloc(fd, smack_attr_to_string(attr), label);
}
-int mac_smack_apply_ip_out_fd(int fd, const char *label) {
- int r = 0;
+int mac_smack_apply(const char *path, SmackAttr attr, const char *label) {
+ int r;
- assert(fd >= 0);
+ assert(path);
+ assert(attr >= 0 && attr < _SMACK_ATTR_MAX);
-#ifdef HAVE_SMACK
if (!mac_smack_use())
return 0;
if (label)
- r = fsetxattr(fd, "security.SMACK64IPOUT", label, strlen(label), 0);
+ r = lsetxattr(path, smack_attr_to_string(attr), label, strlen(label), 0);
else
- r = fremovexattr(fd, "security.SMACK64IPOUT");
+ r = lremovexattr(path, smack_attr_to_string(attr));
if (r < 0)
return -errno;
-#endif
- return r;
+ return 0;
}
-int mac_smack_apply_ip_in_fd(int fd, const char *label) {
- int r = 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);
-#ifdef HAVE_SMACK
if (!mac_smack_use())
return 0;
if (label)
- r = fsetxattr(fd, "security.SMACK64IPIN", label, strlen(label), 0);
+ r = fsetxattr(fd, smack_attr_to_string(attr), label, strlen(label), 0);
else
- r = fremovexattr(fd, "security.SMACK64IPIN");
+ r = fremovexattr(fd, smack_attr_to_string(attr));
if (r < 0)
return -errno;
-#endif
- return r;
+ return 0;
}
int mac_smack_apply_pid(pid_t pid, const char *label) {
-
-#ifdef HAVE_SMACK
const char *p;
-#endif
int r = 0;
assert(label);
-#ifdef HAVE_SMACK
if (!mac_smack_use())
return 0;
@@ -142,21 +126,16 @@ int mac_smack_apply_pid(pid_t pid, const char *label) {
r = write_string_file(p, label, 0);
if (r < 0)
return r;
-#endif
return r;
}
int mac_smack_fix(const char *path, bool ignore_enoent, bool ignore_erofs) {
-
-#ifdef HAVE_SMACK
struct stat st;
-#endif
int r = 0;
assert(path);
-#ifdef HAVE_SMACK
if (!mac_smack_use())
return 0;
@@ -202,7 +181,37 @@ int mac_smack_fix(const char *path, bool ignore_enoent, bool ignore_erofs) {
r = log_debug_errno(errno, "Unable to fix SMACK label of %s: %m", path);
}
-#endif
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;
+}
+#endif