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47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/* Copyright (C) 1992-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but 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
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/utsname.h>
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/* Put the name of the current host in no more than LEN bytes of NAME.
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The result is null-terminated if LEN is large enough for the full
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name and the terminator. */
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int
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__gethostname (char *name, size_t len)
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{
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struct utsname buf;
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size_t node_len;
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if (__uname (&buf))
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return -1;
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node_len = strlen (buf.nodename) + 1;
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memcpy (name, buf.nodename, len < node_len ? len : node_len);
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if (node_len > len)
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{
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__set_errno (ENAMETOOLONG);
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return -1;
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}
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return 0;
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}
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weak_alias (__gethostname, gethostname)
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