45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/* xreadlink.c -- readlink wrapper to return the link name in malloc'd storage
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Copyright (C) 2001, 2003-2007, 2009-2022 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Jim Meyering <jim@meyering.net>
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and Bruno Haible <bruno@clisp.org>. */
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#include <config.h>
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/* Specification. */
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#include "xreadlink.h"
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#include <errno.h>
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#include "areadlink.h"
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#include "xalloc.h"
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/* Call readlink to get the symbolic link value of FILENAME.
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Return a pointer to that NUL-terminated string in malloc'd storage.
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If readlink fails, return NULL and set errno.
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If realloc fails, or if the link value is longer than SIZE_MAX :-),
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give a diagnostic and exit. */
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char *
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xreadlink (char const *filename)
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{
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char *result = areadlink (filename);
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if (result == NULL && errno == ENOMEM)
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xalloc_die ();
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return result;
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}
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