28 lines
447 B
C
28 lines
447 B
C
/* rename -- rename a file
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This function is in the public domain. */
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/* Rename a file. */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <errno.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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int
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rename (zfrom, zto)
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char *zfrom;
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char *zto;
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{
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if (link (zfrom, zto) < 0)
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{
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if (errno != EEXIST)
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return -1;
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if (unlink (zto) < 0
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|| link (zfrom, zto) < 0)
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return -1;
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}
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return unlink (zfrom);
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}
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