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label: unify code to make directories, symlinks

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This commit is contained in:
Lennart Poettering 2014-10-23 19:58:45 +02:00
parent f3c80515c1
commit c34255bdb2
8 changed files with 62 additions and 101 deletions
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1
src/machine/machined.c
View File

@ -35,6 +35,7 @@
#include "bus-util.h"
#include "bus-error.h"
#include "machined.h"
#include "label.h"
Manager *manager_new(void) {
Manager *m;

22
src/shared/dev-setup.c
View File

@ -32,24 +32,6 @@
#include "util.h"
#include "label.h"
static int symlink_and_label(const char *old_path, const char *new_path) {
int r;
assert(old_path);
assert(new_path);
r = mac_selinux_create_file_prepare(new_path, S_IFLNK);
if (r < 0)
return r;
if (symlink(old_path, new_path) < 0)
r = -errno;
mac_selinux_create_file_clear();
return r;
}
int dev_setup(const char *prefix) {
const char *j, *k;
@ -75,9 +57,9 @@ int dev_setup(const char *prefix) {
if (!link_name)
return -ENOMEM;
symlink_and_label(j, link_name);
symlink_label(j, link_name);
} else
symlink_and_label(j, k);
symlink_label(j, k);
}
return 0;

41
src/shared/label.c
View File

@ -35,3 +35,44 @@ int label_fix(const char *path, bool ignore_enoent, bool ignore_erofs) {
return 0;
}
int mkdir_label(const char *path, mode_t mode) {
int r;
assert(path);
r = mac_selinux_create_file_prepare(path, S_IFDIR);
if (r < 0)
return r;
if (mkdir(path, mode) < 0)
r = -errno;
mac_selinux_create_file_clear();
if (r < 0)
return r;
return mac_smack_fix(path, false, false);
}
int symlink_label(const char *old_path, const char *new_path) {
int r;
assert(old_path);
assert(new_path);
r = mac_selinux_create_file_prepare(new_path, S_IFLNK);
if (r < 0)
return r;
if (symlink(old_path, new_path) < 0)
r = -errno;
mac_selinux_create_file_clear();
if (r < 0)
return r;
return mac_smack_fix(new_path, false, false);
}

3
src/shared/label.h
View File

@ -25,3 +25,6 @@
#include "smack-util.h"
int label_fix(const char *path, bool ignore_enoent, bool ignore_erofs);
int mkdir_label(const char *path, mode_t mode);
int symlink_label(const char *old_path, const char *new_path);

31
src/shared/mkdir-label.c
View File

@ -32,39 +32,14 @@
#include "path-util.h"
#include "mkdir.h"
static int label_mkdir(const char *path, mode_t mode) {
int r;
if (mac_selinux_use())
return mac_selinux_mkdir(path, mode);
if (mac_smack_use()) {
r = mkdir(path, mode);
if (r < 0)
return -errno;
return mac_smack_fix(path, false, false);
}
r = mkdir(path, mode);
if (r < 0)
return -errno;
return 0;
}
int mkdir_label(const char *path, mode_t mode) {
return label_mkdir(path, mode);
}
int mkdir_safe_label(const char *path, mode_t mode, uid_t uid, gid_t gid) {
return mkdir_safe_internal(path, mode, uid, gid, label_mkdir);
return mkdir_safe_internal(path, mode, uid, gid, mkdir_label);
}
int mkdir_parents_label(const char *path, mode_t mode) {
return mkdir_parents_internal(NULL, path, mode, label_mkdir);
return mkdir_parents_internal(NULL, path, mode, mkdir_label);
}
int mkdir_p_label(const char *path, mode_t mode) {
return mkdir_p_internal(NULL, path, mode, label_mkdir);
return mkdir_p_internal(NULL, path, mode, mkdir_label);
}

1
src/shared/mkdir.h
View File

@ -30,7 +30,6 @@ int mkdir_parents(const char *path, mode_t mode);
int mkdir_p(const char *path, mode_t mode);
/* mandatory access control(MAC) versions */
int mkdir_label(const char *path, mode_t mode);
int mkdir_safe_label(const char *path, mode_t mode, uid_t uid, gid_t gid);
int mkdir_parents_label(const char *path, mode_t mode);
int mkdir_p_label(const char *path, mode_t mode);

63
src/shared/selinux-util.c
View File

@ -319,7 +319,18 @@ int mac_selinux_create_file_prepare(const char *path, mode_t mode) {
if (!label_hnd)
return 0;
r = selabel_lookup_raw(label_hnd, &filecon, path, mode);
if (path_is_absolute(path))
r = selabel_lookup_raw(label_hnd, &filecon, path, mode);
else {
_cleanup_free_ char *newpath;
newpath = path_make_absolute_cwd(path);
if (!newpath)
return -ENOMEM;
r = selabel_lookup_raw(label_hnd, &filecon, newpath, S_IFDIR);
}
if (r < 0 && errno != ENOENT)
r = -errno;
else if (r == 0) {
@ -380,56 +391,6 @@ void mac_selinux_create_socket_clear(void) {
#endif
}
int mac_selinux_mkdir(const char *path, mode_t mode) {
/* Creates a directory and labels it according to the SELinux policy */
#ifdef HAVE_SELINUX
_cleanup_security_context_free_ security_context_t fcon = NULL;
int r;
assert(path);
if (!label_hnd)
goto skipped;
if (path_is_absolute(path))
r = selabel_lookup_raw(label_hnd, &fcon, path, S_IFDIR);
else {
_cleanup_free_ char *newpath;
newpath = path_make_absolute_cwd(path);
if (!newpath)
return -ENOMEM;
r = selabel_lookup_raw(label_hnd, &fcon, newpath, S_IFDIR);
}
if (r == 0)
r = setfscreatecon(fcon);
if (r < 0 && errno != ENOENT) {
log_enforcing("Failed to set SELinux security context %s for %s: %m", fcon, path);
if (security_getenforce() == 1) {
r = -errno;
goto finish;
}
}
r = mkdir(path, mode);
if (r < 0)
r = -errno;
finish:
setfscreatecon(NULL);
return r;
skipped:
#endif
return mkdir(path, mode) < 0 ? -errno : 0;
}
int mac_selinux_bind(int fd, const struct sockaddr *addr, socklen_t addrlen) {
/* Binds a socket and label its file system object according to the SELinux policy */

1
src/shared/selinux-util.h
View File

@ -45,5 +45,4 @@ void mac_selinux_create_file_clear(void);
int mac_selinux_create_socket_prepare(const char *label);
void mac_selinux_create_socket_clear(void);
int mac_selinux_mkdir(const char *path, mode_t mode);
int mac_selinux_bind(int fd, const struct sockaddr *addr, socklen_t addrlen);