- return 0;
- }
-}
-
-
-int acl_execute_masked(const char* path) {
- /* Returns 1 i the given path has an ACL mask which denies
- execute. Returns 0 if it does not (or if it has no ACL/mask at
- all), and -1 on error. */
-
- acl_t acl = acl_get_file(path, ACL_TYPE_ACCESS);
-
- if (acl == (acl_t)NULL) {
- return 0;
- }
-
- /* Our return value. */
- int result = 0;
-
- acl_entry_t entry;
- int ge_result = acl_get_entry(acl, ACL_FIRST_ENTRY, &entry);
-
- while (ge_result == 1) {
- acl_tag_t tag = ACL_UNDEFINED_TAG;
- int tag_result = acl_get_tag_type(entry, &tag);
-
- if (tag_result == -1) {
- perror("acl_execute_masked (acl_get_tag_type)");
- result = -1;
- goto cleanup;
- }
-
- if (tag == ACL_MASK) {
- /* This is the mask entry, get its permissions, and see if
- execute is specified. */
- acl_permset_t permset;
-
- int ps_result = acl_get_permset(entry, &permset);
- if (ps_result == -1) {
- perror("acl_execute_masked (acl_get_permset)");
- result = -1;
- goto cleanup;
- }
-
- int gp_result = acl_get_perm(permset, ACL_EXECUTE);
- if (gp_result == -1) {
- perror("acl_execute_masked (acl_get_perm)");
- result = -1;
- goto cleanup;
- }
-
- if (gp_result == 0) {
- /* No execute bit set in the mask; execute not allowed. */
- return 1;
- }
- }
-
- ge_result = acl_get_entry(acl, ACL_NEXT_ENTRY, &entry);
- }
-
- cleanup:
- acl_free(acl);
- return result;
-}
-
-
-int any_can_execute_or_dir(const char* path) {
- /* If the given path is a directory, returns 1. Otherwise, returns 1
- * if any ACL entry has EFFECTIVE execute access, 0 if none do, and
- * -1 on error.
- *
- * This is meant to somewhat mimic setfacl's handling of the capital
- * 'X' perm, which allows execute access if the target is a
- * directory or someone can already execute it. We differ in that we
- * check the effective execute rather than just the execute bits.
- */
-
- if (is_directory(path)) {
- /* That was easy... */
- return 1;
- }
-
- acl_t acl = acl_get_file(path, ACL_TYPE_ACCESS);
-
- if (acl == (acl_t)NULL) {
- return 0;
- }
-
- /* Our return value. */
- int result = 0;
-
- if (acl_is_minimal(&acl)) {
- mode_t mode = get_mode(path);
- if (mode & (S_IXUSR | S_IXOTH | S_IXGRP)) {
- result = 1;
- goto cleanup;
- }
- else {
- result = 0;
- goto cleanup;
- }
- }
-
- acl_entry_t entry;
- int ge_result = acl_get_entry(acl, ACL_FIRST_ENTRY, &entry);
-
- while (ge_result == 1) {
- acl_permset_t permset;
-
- int ps_result = acl_get_permset(entry, &permset);
- if (ps_result == -1) {
- perror("any_can_execute_or_dir (acl_get_permset)");
- result = -1;
- goto cleanup;
- }
-
- int gp_result = acl_get_perm(permset, ACL_EXECUTE);
- if (gp_result == -1) {
- perror("any_can_execute_or_dir (acl_get_perm)");
- result = -1;
- goto cleanup;
- }
-
- if (gp_result == 1) {
- /* Only return one if this execute bit is not masked. */
- if (acl_execute_masked(path) != 1) {
- result = 1;
- goto cleanup;
- }
- }
-
- ge_result = acl_get_entry(acl, ACL_NEXT_ENTRY, &entry);
- }
-
- if (ge_result == -1) {
- perror("any_can_execute_or_dir (acl_get_entry)");
- result = -1;
- goto cleanup;
- }
-
- cleanup:
- acl_free(acl);
- return result;
-}
-
-
-int inherit_default_acl(const char* path, const char* parent) {
- /* Inherit the default ACL from parent to path. This overwrites any
- * existing default ACL. Returns 1 for success, 0 for failure, and
- * -1 on error.
- */
-
- /* Our return value. */
- int result = 1;
-
- if (path == NULL) {
- errno = ENOENT;
- return -1;
- }
-
- if (!is_directory(path) || !is_directory(parent)) {
- return 0;
- }
-
- acl_t parent_acl = acl_get_file(parent, ACL_TYPE_DEFAULT);
- if (parent_acl == (acl_t)NULL) {
- return 0;
- }
-
- acl_t path_acl = acl_dup(parent_acl);
-
- if (path_acl == (acl_t)NULL) {
- perror("inherit_default_acl (acl_dup)");
- acl_free(parent_acl);
- return -1;
- }
-
- int sf_result = acl_set_file(path, ACL_TYPE_DEFAULT, path_acl);
- if (sf_result == -1) {
- perror("inherit_default_acl (acl_set_file)");
- result = -1;
- goto cleanup;
- }
-
- cleanup:
- acl_free(path_acl);
- return result;
-}
-
-
-int wipe_acls(const char* path) {
- /* Remove ACL_USER, ACL_GROUP, and ACL_MASK entries from
- path. Returns 1 for success, 0 for failure, and -1 on error. */
-
- if (path == NULL) {
- errno = ENOENT;
- return -1;
- }
-
- /* Finally, remove individual named/mask entries. */
- acl_t acl = acl_get_file(path, ACL_TYPE_ACCESS);
- if (acl == (acl_t)NULL) {
- perror("wipe_acls (acl_get_file)");
- return -1;
- }
-
- /* Our return value. */
- int result = 1;
-
- acl_entry_t entry;
- int ge_result = acl_get_entry(acl, ACL_FIRST_ENTRY, &entry);
-
- while (ge_result == 1) {
- int d_result = acl_delete_entry(acl, entry);
- if (d_result == -1) {
- perror("wipe_acls (acl_delete_entry)");
- result = -1;
- goto cleanup;
- }
-
- ge_result = acl_get_entry(acl, ACL_NEXT_ENTRY, &entry);
- }
-
- /* Catches the first acl_get_entry as well as the ones at the end of
- the loop. */
- if (ge_result == -1) {
- perror("wipe_acls (acl_get_entry)");
- result = -1;
- goto cleanup;
- }
-
- int sf_result = acl_set_file(path, ACL_TYPE_ACCESS, acl);
- if (sf_result == -1) {
- perror("wipe_acls (acl_set_file)");
- result = -1;
- goto cleanup;
- }
-
- cleanup:
- acl_free(acl);
- return result;
-}
-
-
-int apply_default_acl(const char* path) {
- /* Really apply the default ACL by looping through it. Returns one
- * for success, zero for failure (i.e. no ACL), and -1 on unexpected
- * errors.
- */
- if (path == NULL) {
- return 0;
- }
-
- if (!is_regular_file(path) && !is_directory(path)) {
- return 0;
- }
-
- /* dirname mangles its argument */
- char path_copy[PATH_MAX];
- strncpy(path_copy, path, PATH_MAX-1);
- path_copy[PATH_MAX-1] = 0;
-
- char* parent = dirname(path_copy);
- if (!is_directory(parent)) {
- /* Make sure dirname() did what we think it did. */
- return 0;