diff options
author | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-02 13:16:04 -0400 |
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committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-02 13:16:04 -0400 |
commit | fccd290a8373438c26ed4e4f8130db18eb9b3dfe (patch) | |
tree | 2f032e1b125aa88e456644de865e9f42fffa4150 /src/libcore/hostname-setup.c | |
parent | 6169d05b4a456e26a0197242464e3e2bca12a29d (diff) |
./move.sh
Diffstat (limited to 'src/libcore/hostname-setup.c')
-rw-r--r-- | src/libcore/hostname-setup.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/src/libcore/hostname-setup.c b/src/libcore/hostname-setup.c new file mode 100644 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; +} |