[deliverable/binutils-gdb.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

*/

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

int
rename (zfrom, zto)
     char *zfrom;
     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
252b5132 RH	1	/* rename -- rename a file
	2	This function is in the public domain. */
	3
39423523 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	*/
252b5132	14
90aaccd1 JL	15	#ifdef HAVE_CONFIG_H
	16	#include "config.h"
	17	#endif
252b5132	18	#include <errno.h>
90aaccd1 JL	19	#ifdef HAVE_UNISTD_H
	20	#include <unistd.h>
	21	#endif
252b5132 RH	22
	23	int
	24	rename (zfrom, zto)
	25	char *zfrom;
	26	char *zto;
	27	{
	28	if (link (zfrom, zto) < 0)
	29	{
	30	if (errno != EEXIST)
	31	return -1;
	32	if (unlink (zto) < 0
	33	\|\| link (zfrom, zto) < 0)
	34	return -1;
	35	}
	36	return unlink (zfrom);
	37	}