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-rw-r--r--lib/init/svcscan.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/lib/init/svcscan.c b/lib/init/svcscan.c
new file mode 100644
index 0000000..f4c7ef1
--- /dev/null
+++ b/lib/init/svcscan.c
@@ -0,0 +1,110 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * Copyright (C) 2018 - David Oberhollenzer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stddef.h>
+#include <dirent.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <ctype.h>
+
+#include "service.h"
+
+int svcscan(const char *directory, service_list_t *list, int flags)
+{
+ int i, dfd, type, ret = 0;
+ struct dirent *ent;
+ const char *ptr;
+ service_t *svc;
+ struct stat sb;
+ DIR *dir;
+
+ for (i = 0; i < TGT_MAX; ++i)
+ list->targets[i] = NULL;
+
+ dir = opendir(directory);
+ if (dir == NULL) {
+ perror(directory);
+ return -1;
+ }
+
+ dfd = dirfd(dir);
+ if (dfd < 0) {
+ perror(directory);
+ closedir(dir);
+ return -1;
+ }
+
+ for (;;) {
+ errno = 0;
+ ent = readdir(dir);
+
+ if (ent == NULL) {
+ if (errno != 0) {
+ perror(directory);
+ ret = -1;
+ }
+ break;
+ }
+
+ for (ptr = ent->d_name; isalnum(*ptr) || *ptr == '_'; ++ptr)
+ ;
+
+ if (*ptr != '\0' && *ptr != '@')
+ continue;
+
+ if (fstatat(dfd, ent->d_name, &sb, AT_SYMLINK_NOFOLLOW)) {
+ fprintf(stderr, "stat %s/%s: %s\n",
+ directory, ent->d_name, strerror(errno));
+ ret = -1;
+ continue;
+ }
+
+ type = (sb.st_mode & S_IFMT);
+
+ if (type != S_IFREG && type != S_IFLNK)
+ continue;
+
+ svc = rdsvc(dfd, ent->d_name, flags);
+ if (svc == NULL) {
+ ret = -1;
+ continue;
+ }
+
+ svc->next = list->targets[svc->target];
+ list->targets[svc->target] = svc;
+ }
+
+ for (i = 0; i < TGT_MAX; ++i) {
+ if (list->targets[i] == NULL)
+ continue;
+
+ errno = 0;
+ list->targets[i] = svc_tsort(list->targets[i]);
+
+ if (errno != 0) {
+ fprintf(stderr, "sorting services read from %s: %s\n",
+ directory, strerror(errno));
+ }
+ }
+
+ closedir(dir);
+ return ret;
+}