-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 = ACL_SUCCESS;
-
- if (path == NULL) {
- errno = ENOENT;
- return ACL_ERROR;
- }
-
- if (!is_directory(path) || !is_directory(parent)) {
- return ACL_FAILURE;
- }
-
- acl_t parent_acl = acl_get_file(parent, ACL_TYPE_DEFAULT);
- if (parent_acl == (acl_t)NULL) {
- perror("inherit_default_acl (acl_get_file)");
- return ACL_ERROR;
- }
-
- 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 ACL_ERROR;
- }
-
- int sf_result = acl_set_file(path, ACL_TYPE_DEFAULT, path_acl);
- if (sf_result == -1) {
- perror("inherit_default_acl (acl_set_file)");
- result = ACL_ERROR;
- 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 ACL_ERROR;
- }
-
- /* 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 ACL_ERROR;
- }
-
- /* Our return value. */
- int result = ACL_SUCCESS;
-
- acl_entry_t entry;
- int ge_result = acl_get_entry(acl, ACL_FIRST_ENTRY, &entry);
-
- while (ge_result == ACL_SUCCESS) {
- int d_result = acl_delete_entry(acl, entry);
- if (d_result == ACL_ERROR) {
- perror("wipe_acls (acl_delete_entry)");
- result = ACL_ERROR;
- 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 == ACL_ERROR) {
- perror("wipe_acls (acl_get_entry)");
- result = ACL_ERROR;
- goto cleanup;
- }
-
- int sf_result = acl_set_file(path, ACL_TYPE_ACCESS, acl);
- if (sf_result == ACL_ERROR) {
- perror("wipe_acls (acl_set_file)");
- result = ACL_ERROR;
- 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 ACL_FAILURE;
- }
-
- if (!is_regular_file(path) && !is_directory(path)) {
- return ACL_FAILURE;
- }
-
- /* 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 ACL_FAILURE;
- }
-
- /* Default to not masking the exec bit; i.e. applying the default
- ACL literally. If --no-exec-mask was not specified, then we try
- to "guess" whether or not to mask the exec bit. */
- bool allow_exec = true;
-
- if (!no_exec_mask) {
- int ace_result = any_can_execute_or_dir(path);
-
- if (ace_result == ACL_ERROR) {
- perror("apply_default_acl (any_can_execute_or_dir)");
- return ACL_ERROR;
- }
- allow_exec = (bool)ace_result;
- }
-
- acl_t defacl = acl_get_file(parent, ACL_TYPE_DEFAULT);
-
- if (defacl == (acl_t)NULL) {
- perror("apply_default_acl (acl_get_file)");
- return ACL_ERROR;
- }
-
- /* Our return value. */
- int result = ACL_SUCCESS;
-
- int wipe_result = wipe_acls(path);
- if (wipe_result == ACL_ERROR) {
- perror("apply_default_acl (wipe_acls)");
- result = ACL_ERROR;
- goto cleanup;
- }
-
- /* Do this after wipe_acls(), otherwise we'll overwrite the wiped
- ACL with this one. */
- acl_t acl = acl_get_file(path, ACL_TYPE_ACCESS);
- if (acl == (acl_t)NULL) {
- perror("apply_default_acl (acl_get_file)");
- return ACL_ERROR;
- }
-
- /* If it's a directory, inherit the parent's default. */
- int inherit_result = inherit_default_acl(path, parent);
- if (inherit_result == ACL_ERROR) {
- perror("apply_default_acl (inherit_acls)");
- result = ACL_ERROR;
- goto cleanup;
- }
-
- acl_entry_t entry;
- int ge_result = acl_get_entry(defacl, ACL_FIRST_ENTRY, &entry);
-
- while (ge_result == ACL_SUCCESS) {
- acl_tag_t tag = ACL_UNDEFINED_TAG;
- int tag_result = acl_get_tag_type(entry, &tag);
-
- if (tag_result == ACL_ERROR) {
- perror("apply_default_acl (acl_get_tag_type)");
- result = ACL_ERROR;
- goto cleanup;
- }
-
-
- /* We've got an entry/tag from the default ACL. Get its permset. */
- acl_permset_t permset;
- int ps_result = acl_get_permset(entry, &permset);
- if (ps_result == ACL_ERROR) {
- perror("apply_default_acl (acl_get_permset)");
- result = ACL_ERROR;
- goto cleanup;
- }
-
- /* If this is a default mask, fix it up. */
- if (tag == ACL_MASK ||
- tag == ACL_USER_OBJ ||
- tag == ACL_GROUP_OBJ ||
- tag == ACL_OTHER) {
-
- if (!allow_exec) {
- /* The mask doesn't affect acl_user_obj, acl_group_obj (in
- minimal ACLs) or acl_other entries, so if execute should be
- masked, we have to do it manually. */
- int d_result = acl_delete_perm(permset, ACL_EXECUTE);
- if (d_result == ACL_ERROR) {
- perror("apply_default_acl (acl_delete_perm)");
- result = ACL_ERROR;
- goto cleanup;
- }
-
- int sp_result = acl_set_permset(entry, permset);
- if (sp_result == ACL_ERROR) {
- perror("apply_default_acl (acl_set_permset)");
- result = ACL_ERROR;
- goto cleanup;
- }
- }
- }
-
- /* Finally, add the permset to the access ACL. */
- int set_result = acl_set_entry(&acl, entry);
- if (set_result == ACL_ERROR) {
- perror("apply_default_acl (acl_set_entry)");
- result = ACL_ERROR;
- goto cleanup;
- }
-
- ge_result = acl_get_entry(defacl, ACL_NEXT_ENTRY, &entry);
- }
-
- /* Catches the first acl_get_entry as well as the ones at the end of
- the loop. */
- if (ge_result == ACL_ERROR) {
- perror("apply_default_acl (acl_get_entry)");
- result = ACL_ERROR;
- goto cleanup;
- }
-
- int sf_result = acl_set_file(path, ACL_TYPE_ACCESS, acl);
- if (sf_result == ACL_ERROR) {
- perror("apply_default_acl (acl_set_file)");
- result = ACL_ERROR;
- goto cleanup;
- }
-
- cleanup:
- acl_free(defacl);
- return result;
-}
-
-
-void usage(char* program_name) {
- /*
- * Print usage information.
- */
- printf("Apply any applicable default ACLs to the given files or "
- "directories.\n\n");
- printf("Usage: %s [flags] <target1> [<target2> [ <target3>...]]\n\n",
- program_name);
- printf("Flags:\n");
- printf(" -h, --help Print this help message\n");
- printf(" -r, --recursive Act on any given directories recursively\n");
- printf(" -x, --no-exec-mask Apply execute permissions unconditionally\n");
-
- return;
-}
-
-
-int apply_default_acl_nftw(const char *target,
- const struct stat *s,
- int info,
- struct FTW *ftw) {
- /* A wrapper around the apply_default_acl() function for use with
- * nftw(). We need to adjust the return value so that nftw() doesn't
- * think we've failed.
- */
- bool reapp_result = apply_default_acl(target);
- if (reapp_result) {
- return FTW_CONTINUE;
- }
- else {
- return FTW_STOP;
- }
-}
-
-
-bool apply_default_acl_recursive(const char *target) {
- /* Attempt to apply default ACLs recursively. If target is a
- * directory, we recurse through its entries. If not, we just
- * apply the default ACL to target.
- *
- * We ignore symlinks for consistency with chmod -r.
- *
- */
- if (!is_directory(target)) {
- return apply_default_acl(target);
- }
-