70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "alloc-util.h"
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#include "fileio.h"
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#include "hostname-util.h"
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#include "log.h"
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#include "macro.h"
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#include "string-util.h"
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#include "util.h"
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#include "hostname-setup.h"
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int hostname_setup(void) {
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int r;
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_cleanup_free_ char *b = NULL;
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const char *hn;
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bool enoent = false;
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r = read_hostname_config("/etc/hostname", &b);
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if (r < 0) {
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if (r == -ENOENT)
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enoent = true;
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else
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log_warning_errno(r, "Failed to read configured hostname: %m");
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hn = NULL;
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} else
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hn = b;
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if (isempty(hn)) {
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/* Don't override the hostname if it is already set
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* and not explicitly configured */
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if (hostname_is_set())
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return 0;
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if (enoent)
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log_info("No hostname configured.");
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hn = "localhost";
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}
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if (sethostname_idempotent(hn) < 0)
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return log_warning_errno(errno, "Failed to set hostname to <%s>: %m", hn);
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log_info("Set hostname to <%s>.", hn);
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return 0;
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}
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