along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <stdlib.h>
-#include <errno.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/capability.h>
-#include <sys/statvfs.h>
-#include <fnmatch.h>
-
-#include "sd-id128.h"
-#include "util.h"
#include "condition.h"
-#include "virt.h"
-#include "path-util.h"
-#include "fileio.h"
#include "unit.h"
-#include "smack-util.h"
-#include "apparmor-util.h"
-#include "ima-util.h"
-#include "selinux-util.h"
-#include "audit.h"
-
-static int condition_test_security(Condition *c) {
- assert(c);
- assert(c->parameter);
- assert(c->type == CONDITION_SECURITY);
-
- if (streq(c->parameter, "selinux"))
- return mac_selinux_use() == !c->negate;
- if (streq(c->parameter, "smack"))
- return mac_smack_use() == !c->negate;
- if (streq(c->parameter, "apparmor"))
- return mac_apparmor_use() == !c->negate;
- if (streq(c->parameter, "audit"))
- return use_audit() == !c->negate;
- if (streq(c->parameter, "ima"))
- return use_ima() == !c->negate;
-
- return c->negate;
-}
-
-static int condition_test_capability(Condition *c) {
- _cleanup_fclose_ FILE *f = NULL;
- cap_value_t value;
- char line[LINE_MAX];
- unsigned long long capabilities = -1;
-
- assert(c);
- assert(c->parameter);
- assert(c->type == CONDITION_CAPABILITY);
-
- /* If it's an invalid capability, we don't have it */
-
- if (cap_from_name(c->parameter, &value) < 0)
- return -EINVAL;
-
- /* If it's a valid capability we default to assume
- * that we have it */
-
- f = fopen("/proc/self/status", "re");
- if (!f)
- return -errno;
-
- while (fgets(line, sizeof(line), f)) {
- truncate_nl(line);
-
- if (startswith(line, "CapBnd:")) {
- (void) sscanf(line+7, "%llx", &capabilities);
- break;
- }
- }
-
- return !!(capabilities & (1ULL << value)) == !c->negate;
-}
-
-static bool condition_test_needs_update(Condition *c) {
- const char *p;
- struct stat usr, other;
-
- assert(c);
- assert(c->parameter);
- assert(c->type == CONDITION_NEEDS_UPDATE);
-
- /* If the file system is read-only we shouldn't suggest an update */
- if (path_is_read_only_fs(c->parameter) > 0)
- return c->negate;
-
- /* Any other failure means we should allow the condition to be true,
- * so that we rather invoke too many update tools then too
- * few. */
-
- if (!path_is_absolute(c->parameter))
- return !c->negate;
-
- p = strappenda(c->parameter, "/.updated");
- if (lstat(p, &other) < 0)
- return !c->negate;
-
- if (lstat("/usr/", &usr) < 0)
- return !c->negate;
-
- return (usr.st_mtim.tv_sec > other.st_mtim.tv_sec ||
- (usr.st_mtim.tv_sec == other.st_mtim.tv_sec && usr.st_mtim.tv_nsec > other.st_mtim.tv_nsec)) == !c->negate;
-}
-
-static bool condition_test_first_boot(Condition *c) {
- int r;
-
- assert(c);
- assert(c->parameter);
- assert(c->type == CONDITION_FIRST_BOOT);
-
- r = parse_boolean(c->parameter);
- if (r < 0)
- return r;
-
- return ((access("/run/systemd/first-boot", F_OK) >= 0) == !!r) == !c->negate;
-}
-
-static int condition_test(Condition *c) {
- assert(c);
-
- switch(c->type) {
-
- case CONDITION_PATH_EXISTS:
- return (access(c->parameter, F_OK) >= 0) == !c->negate;
-
- case CONDITION_PATH_EXISTS_GLOB:
- return (glob_exists(c->parameter) > 0) == !c->negate;
-
- case CONDITION_PATH_IS_DIRECTORY: {
- struct stat st;
-
- if (stat(c->parameter, &st) < 0)
- return c->negate;
- return S_ISDIR(st.st_mode) == !c->negate;
- }
-
- case CONDITION_PATH_IS_SYMBOLIC_LINK: {
- struct stat st;
-
- if (lstat(c->parameter, &st) < 0)
- return c->negate;
- return S_ISLNK(st.st_mode) == !c->negate;
- }
-
- case CONDITION_PATH_IS_MOUNT_POINT:
- return (path_is_mount_point(c->parameter, true) > 0) == !c->negate;
-
- case CONDITION_PATH_IS_READ_WRITE:
- return (path_is_read_only_fs(c->parameter) > 0) == c->negate;
-
- case CONDITION_DIRECTORY_NOT_EMPTY: {
- int k;
-
- k = dir_is_empty(c->parameter);
- return !(k == -ENOENT || k > 0) == !c->negate;
- }
-
- case CONDITION_FILE_NOT_EMPTY: {
- struct stat st;
-
- if (stat(c->parameter, &st) < 0)
- return c->negate;
-
- return (S_ISREG(st.st_mode) && st.st_size > 0) == !c->negate;
- }
-
- case CONDITION_FILE_IS_EXECUTABLE: {
- struct stat st;
-
- if (stat(c->parameter, &st) < 0)
- return c->negate;
-
- return (S_ISREG(st.st_mode) && (st.st_mode & 0111)) == !c->negate;
- }
-
- case CONDITION_KERNEL_COMMAND_LINE:
- return condition_test_kernel_command_line(c);
-
- case CONDITION_VIRTUALIZATION:
- return condition_test_virtualization(c);
-
- case CONDITION_SECURITY:
- return condition_test_security(c);
-
- case CONDITION_CAPABILITY:
- return condition_test_capability(c);
-
- case CONDITION_HOST:
- return condition_test_host(c);
-
- case CONDITION_AC_POWER:
- return condition_test_ac_power(c);
-
- case CONDITION_ARCHITECTURE:
- return condition_test_architecture(c);
-
- case CONDITION_NEEDS_UPDATE:
- return condition_test_needs_update(c);
-
- case CONDITION_FIRST_BOOT:
- return condition_test_first_boot(c);
-
- case CONDITION_NULL:
- return !c->negate;
-
- default:
- assert_not_reached("Invalid condition type.");
- }
-}
bool condition_test_list(const char *unit, Condition *first) {
Condition *c;
~ianmdlvl / elogind.git / blobdiff