f35cb39ed6
First of all, let's rename it to read_etc_hostname(), to make clearer what kind of configuration it actually reads: the file format defined in /etc/hostname and nothing else. Secondly: let's port this to use read_line(), i.e. the new way to read lines from a file in a safe, bounded way. Thirdly: let's strip leading/trailing whitespace from what we are reading. Given that we are already pretty lenient what we read (comments and empty lines), let's be permissive regarding whitespace too. Fourthly: let's actually validate the hostname when reading it. So far we tried to make it valid, but that's not always possible (for example, we can't make an empty hostname valid, ever).
44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2010-2015 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 <stdbool.h>
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#include "macro.h"
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bool hostname_is_set(void);
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char* gethostname_malloc(void);
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int gethostname_strict(char **ret);
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bool hostname_is_valid(const char *s, bool allow_trailing_dot) _pure_;
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char* hostname_cleanup(char *s);
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#define machine_name_is_valid(s) hostname_is_valid(s, false)
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bool is_localhost(const char *hostname);
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bool is_gateway_hostname(const char *hostname);
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int sethostname_idempotent(const char *s);
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int read_etc_hostname_stream(FILE *f, char **ret);
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int read_etc_hostname(const char *path, char **ret);
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