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-rw-r--r--src/libcore/hostname-setup.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/src/libcore/hostname-setup.c b/src/libcore/hostname-setup.c
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index 0000000000..68be52856b
--- /dev/null
+++ b/src/libcore/hostname-setup.c
@@ -0,0 +1,68 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "alloc-util.h"
+#include "fileio.h"
+#include "hostname-setup.h"
+#include "hostname-util.h"
+#include "log.h"
+#include "macro.h"
+#include "string-util.h"
+#include "util.h"
+
+int hostname_setup(void) {
+ int r;
+ _cleanup_free_ char *b = NULL;
+ const char *hn;
+ bool enoent = false;
+
+ r = read_hostname_config("/etc/hostname", &b);
+ if (r < 0) {
+ if (r == -ENOENT)
+ enoent = true;
+ else
+ log_warning_errno(r, "Failed to read configured hostname: %m");
+
+ hn = NULL;
+ } else
+ hn = b;
+
+ if (isempty(hn)) {
+ /* Don't override the hostname if it is already set
+ * and not explicitly configured */
+ if (hostname_is_set())
+ return 0;
+
+ if (enoent)
+ log_info("No hostname configured.");
+
+ hn = "localhost";
+ }
+
+ r = sethostname_idempotent(hn);
+ if (r < 0)
+ return log_warning_errno(r, "Failed to set hostname to <%s>: %m", hn);
+
+ log_info("Set hostname to <%s>.", hn);
+ return 0;
+}