[thirdparty/gcc.git] / libiberty / rename.c

/* rename -- rename a file
   This function is in the public domain. */

/*

@deftypefn Supplemental int rename (const char *@var{old}, const char *@var{new})

Renames a file from @var{old} to @var{new}.  If @var{new} already
exists, it is removed.

@end deftypefn

*/

#include "ansidecl.h"
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <errno.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

int
rename (zfrom, zto)
     const char *zfrom;
     const char *zto;
{
  if (link (zfrom, zto) < 0)
    {
      if (errno != EEXIST)
	return -1;
      if (unlink (zto) < 0
	  || link (zfrom, zto) < 0)
	return -1;
    }
  return unlink (zfrom);
}
Commit	Line	Data
6599da04 JM	1	/* rename -- rename a file
	2	This function is in the public domain. */
	3
aaa5f039 DD	4	/*
	5
	6	@deftypefn Supplemental int rename (const char @var{old}, const char @var{new})
	7
	8	Renames a file from @var{old} to @var{new}. If @var{new} already
	9	exists, it is removed.
	10
	11	@end deftypefn
	12
	13	*/
6599da04	14
c9ac9147	15	#include "ansidecl.h"
c2f275e4 RB	16	#ifdef HAVE_CONFIG_H
	17	#include "config.h"
	18	#endif
6599da04	19	#include <errno.h>
c2f275e4 RB	20	#ifdef HAVE_UNISTD_H
	21	#include <unistd.h>
	22	#endif
6599da04 JM	23
	24	int
	25	rename (zfrom, zto)
c9ac9147 KG	26	const char *zfrom;
c9ac9147 KG	27	const char *zto;
6599da04 JM	28	{
	29	if (link (zfrom, zto) < 0)
	30	{
	31	if (errno != EEXIST)
	32	return -1;
	33	if (unlink (zto) < 0
	34	\|\| link (zfrom, zto) < 0)
	35	return -1;
	36	}
	37	return unlink (zfrom);
	38	}