derek.holloway
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37 lines
633 B
C
37 lines
633 B
C
/* rename -- rename a file
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This function is in the public domain. */
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/*
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@deftypefn Supplemental int rename (const char *@var{old}, const char *@var{new})
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Renames a file from @var{old} to @var{new}. If @var{new} already
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exists, it is removed.
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@end deftypefn
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*/
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#include "ansidecl.h"
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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 (const char *zfrom, const 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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