diff --git a/src/basic/selinux-util.c b/src/basic/selinux-util.c index e15bd7e1fa..238b1d95e2 100644 --- a/src/basic/selinux-util.c +++ b/src/basic/selinux-util.c @@ -316,47 +316,88 @@ char* mac_selinux_free(char *label) { return NULL; } -int mac_selinux_create_file_prepare(const char *path, mode_t mode) { +#if HAVE_SELINUX +static int selinux_create_file_prepare_abspath(const char *abspath, mode_t mode) { + _cleanup_freecon_ char *filecon = NULL; + _cleanup_free_ char *path = NULL; + int r; + + assert(abspath); + assert(path_is_absolute(abspath)); + + r = selabel_lookup_raw(label_hnd, &filecon, abspath, mode); + if (r < 0) { + /* No context specified by the policy? Proceed without setting it. */ + if (errno == ENOENT) + return 0; + + log_enforcing_errno(errno, "Failed to determine SELinux security context for %s: %m", abspath); + } else { + if (setfscreatecon_raw(filecon) >= 0) + return 0; /* Success! */ + + log_enforcing_errno(errno, "Failed to set SELinux security context %s for %s: %m", filecon, abspath); + } + + if (security_getenforce() > 0) + return -errno; + + return 0; +} +#endif + +int mac_selinux_create_file_prepare_at(int dirfd, const char *path, mode_t mode) { + int r = 0; #if HAVE_SELINUX - _cleanup_freecon_ char *filecon = NULL; - int r; + _cleanup_free_ char *abspath = NULL; + _cleanup_close_ int fd = -1; assert(path); if (!label_hnd) return 0; - if (path_is_absolute(path)) - r = selabel_lookup_raw(label_hnd, &filecon, path, mode); - else { - _cleanup_free_ char *newpath = NULL; + if (!path_is_absolute(path)) { + _cleanup_free_ char *p = NULL; - r = path_make_absolute_cwd(path, &newpath); + if (dirfd == AT_FDCWD) + r = safe_getcwd(&p); + else + r = fd_get_path(dirfd, &p); if (r < 0) return r; - r = selabel_lookup_raw(label_hnd, &filecon, newpath, mode); + abspath = path_join(NULL, p, path); + if (!abspath) + return -ENOMEM; + + path = abspath; } - if (r < 0) { - /* No context specified by the policy? Proceed without setting it. */ - if (errno == ENOENT) - return 0; - - log_enforcing_errno(errno, "Failed to determine SELinux security context for %s: %m", path); - } else { - if (setfscreatecon_raw(filecon) >= 0) - return 0; /* Success! */ - - log_enforcing_errno(errno, "Failed to set SELinux security context %s for %s: %m", filecon, path); - } - - if (security_getenforce() > 0) - return -errno; - + r = selinux_create_file_prepare_abspath(path, mode); #endif - return 0; + return r; +} + +int mac_selinux_create_file_prepare(const char *path, mode_t mode) { + int r = 0; + +#if HAVE_SELINUX + _cleanup_free_ char *abspath = NULL; + + assert(path); + + if (!label_hnd) + return 0; + + r = path_make_absolute_cwd(path, &abspath); + if (r < 0) + return r; + + r = selinux_create_file_prepare_abspath(abspath, mode); +#endif + return r; } void mac_selinux_create_file_clear(void) { diff --git a/src/basic/selinux-util.h b/src/basic/selinux-util.h index 08314057fb..bd5207c318 100644 --- a/src/basic/selinux-util.h +++ b/src/basic/selinux-util.h @@ -23,6 +23,7 @@ int mac_selinux_get_child_mls_label(int socket_fd, const char *exe, const char * char* mac_selinux_free(char *label); int mac_selinux_create_file_prepare(const char *path, mode_t mode); +int mac_selinux_create_file_prepare_at(int dirfd, const char *path, mode_t mode); void mac_selinux_create_file_clear(void); int mac_selinux_create_socket_prepare(const char *label);