X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fshared%2Futil.c;h=4143f6d643ebca2cb02c105ba0504d1a55d9f72d;hp=5f6249eb045d2fbb938af32e135a6811695f5c77;hb=a9169c1c589bf7c7a29e7905d17e350ce7c7c48e;hpb=6f53e671aa7539cab02c9f739d84d28a343ca5bc

diff --git a/src/shared/util.c b/src/shared/util.c
index 5f6249eb0..4143f6d64 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -6933,10 +6933,21 @@ int is_symlink(const char *path) {
         if (lstat(path, &info) < 0)
                 return -errno;
 
-        if (S_ISLNK(info.st_mode))
-                return 1;
+        return !!S_ISLNK(info.st_mode);
+}
 
-        return 0;
+int is_dir(const char* path, bool follow) {
+        struct stat st;
+
+        if (follow) {
+                if (stat(path, &st) < 0)
+                        return -errno;
+        } else {
+                if (lstat(path, &st) < 0)
+                        return -errno;
+        }
+
+        return !!S_ISDIR(st.st_mode);
 }
 
 int unquote_first_word(const char **p, char **ret) {
@@ -7164,3 +7175,23 @@ int free_and_strdup(char **p, const char *s) {
 
         return 0;
 }
+
+int sethostname_idempotent(const char *s) {
+        int r;
+        char buf[HOST_NAME_MAX + 1] = {};
+
+        assert(s);
+
+        r = gethostname(buf, sizeof(buf));
+        if (r < 0)
+                return -errno;
+
+        if (streq(buf, s))
+                return 0;
+
+        r = sethostname(s, strlen(s));
+        if (r < 0)
+                return -errno;
+
+        return 1;
+}