initctl: check for kexec_loaded when reboot is requested through initctl

[elogind.git] / src / util.c

diff --git a/src/util.c b/src/util.c
index e31e0f575abae17bdfe117a0f022c53d18c77f4e..6033aa05b271b4f55f361d31d576ba13c979de76 100644 (file)
--- a/src/util.c
+++ b/src/util.c
@@ -2895,19 +2895,25 @@ ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
         return n;
 }
 
-int path_is_mount_point(const char *t) {
+int path_is_mount_point(const char *t, bool allow_symlink) {
         struct stat a, b;
         char *parent;
         int r;
 
-        if (lstat(t, &a) < 0) {
+        if (allow_symlink)
+                r = stat(t, &a);
+        else
+                r = lstat(t, &a);
+
+        if (r < 0) {
                 if (errno == ENOENT)
                         return 0;
 
                 return -errno;
         }
 
-        if ((r = parent_of_path(t, &parent)) < 0)
+        r = parent_of_path(t, &parent);
+        if (r < 0)
                 return r;
 
         r = lstat(parent, &b);
@@ -5846,3 +5852,15 @@ static const char *const signal_table[] = {
 };
 
 DEFINE_STRING_TABLE_LOOKUP(signal, int);
+
+bool kexec_loaded(void) {
+       bool loaded = false;
+       char *s;
+
+       if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) {
+               if (s[0] == '1')
+                       loaded = true;
+               free(s);
+       }
+       return loaded;
+}