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46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/* Query filename corresponding to an open FD. Linux version.
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Copyright (C) 2001 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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<http://www.gnu.org/licenses/>. */
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <stdio-common/_itoa.h>
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static inline const char *
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fd_to_filename (int fd)
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{
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char *ret = malloc (30);
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if (ret != NULL)
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{
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struct stat64 st;
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*_fitoa_word (fd, __stpcpy (ret, "/proc/self/fd/"), 10, 0) = '\0';
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/* We must make sure the file exists. */
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if (__lxstat64 (_STAT_VER, ret, &st) < 0)
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{
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/* /proc is not mounted or something else happened. Don't
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return the file name. */
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free (ret);
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ret = NULL;
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}
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}
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return ret;
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}
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