util: try to be a bit more NFS compatible when checking whether an FS is writable

[elogind.git] / src / shared / util.c

diff --git a/src/shared/util.c b/src/shared/util.c
index 3d16cd1a13a5c52d4a30d955a5235adcefe8c3c7..18d40f398faace72f499a062ac42e9f8c15918ce 100644 (file)
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -2084,12 +2084,14 @@ fail:
 }
 
 int release_terminal(void) {
-        int r = 0;
-        struct sigaction sa_old, sa_new = {
+        static const struct sigaction sa_new = {
                 .sa_handler = SIG_IGN,
                 .sa_flags = SA_RESTART,
         };
-        _cleanup_close_ int fd;
+
+        _cleanup_close_ int fd = -1;
+        struct sigaction sa_old;
+        int r = 0;
 
         fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC);
         if (fd < 0)
@@ -6868,11 +6870,13 @@ char *tempfn_random(const char *p) {
 bool is_localhost(const char *hostname) {
         assert(hostname);
 
-        /* This tries to identify local hostnames described in RFC6761
-         * plus the redhatism of .localdomain */
+        /* This tries to identify local host and domain names
+         * described in RFC6761 plus the redhatism of .localdomain */
 
         return streq(hostname, "localhost") ||
                streq(hostname, "localhost.") ||
+               streq(hostname, "localdomain.") ||
+               streq(hostname, "localdomain") ||
                endswith(hostname, ".localhost") ||
                endswith(hostname, ".localhost.") ||
                endswith(hostname, ".localdomain") ||
@@ -6918,3 +6922,15 @@ int take_password_lock(const char *root) {
 
         return fd;
 }
+
+int is_symlink(const char *path) {
+        struct stat info;
+
+        if (lstat(path, &info) < 0)
+                return -errno;
+
+        if (S_ISLNK(info.st_mode))
+                return 1;
+
+        return 0;
+}