From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 26 Oct 2018 14:51:00 +0000 (+0200)
Subject: stat-util: add fd_verify_directory(), similar to fd_verify_regular()
X-Git-Tag: v240~175^2~6
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=844416b64c15f7b417d79bf64df9f475cf4d6047;p=thirdparty%2Fsystemd.git

stat-util: add fd_verify_directory(), similar to fd_verify_regular()
---

diff --git a/src/basic/stat-util.c b/src/basic/stat-util.c
index 3bef0dfe44f..8b63eb360b6 100644
--- a/src/basic/stat-util.c
+++ b/src/basic/stat-util.c
@@ -296,3 +296,26 @@ int fd_verify_regular(int fd) {
 
         return stat_verify_regular(&st);
 }
+
+int stat_verify_directory(const struct stat *st) {
+        assert(st);
+
+        if (S_ISLNK(st->st_mode))
+                return -ELOOP;
+
+        if (!S_ISDIR(st->st_mode))
+                return -ENOTDIR;
+
+        return 0;
+}
+
+int fd_verify_directory(int fd) {
+        struct stat st;
+
+        assert(fd >= 0);
+
+        if (fstat(fd, &st) < 0)
+                return -errno;
+
+        return stat_verify_directory(&st);
+}
diff --git a/src/basic/stat-util.h b/src/basic/stat-util.h
index 1a725f1da04..84400a6083b 100644
--- a/src/basic/stat-util.h
+++ b/src/basic/stat-util.h
@@ -59,3 +59,6 @@ int path_is_temporary_fs(const char *path);
 
 int stat_verify_regular(const struct stat *st);
 int fd_verify_regular(int fd);
+
+int stat_verify_directory(const struct stat *st);
+int fd_verify_directory(int fd);