76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
/*
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* rename - rename a file
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*/
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/* Copyright (C) 1999 Free Software Foundation, Inc.
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This file is part of GNU Bash, the Bourne Again SHell.
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Bash 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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Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#if !defined (HAVE_RENAME)
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#include <bashtypes.h>
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#include <posixstat.h>
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h>
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#endif
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#include <errno.h>
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#include <stdc.h>
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#ifndef errno
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extern int errno;
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#endif
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int
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rename (from, to)
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const char *from, *to;
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{
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struct stat fb, tb;
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if (stat (from, &fb) < 0)
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return -1;
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if (stat (to, &tb) < 0)
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{
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if (errno != ENOENT)
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return -1;
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}
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else
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{
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if (fb.st_dev == tb.st_dev && fb.st_ino == tb.st_ino)
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return 0; /* same file */
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if (unlink (to) < 0 && errno != ENOENT)
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return -1;
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}
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if (link (from, to) < 0)
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return (-1);
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if (unlink (from) < 0 && errno != ENOENT)
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{
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int e = errno;
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unlink (to);
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errno = e;
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return (-1);
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}
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return (0);
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}
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#endif /* !HAVE_RENAME */
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