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/* Emulate getcwd using getwd.

   This function is in the public domain. */

/*

NAME

        getcwd -- get absolute pathname for current working directory

SYNOPSIS

        char *getcwd (char pathname[len], len)

DESCRIPTION

        Copy the absolute pathname for the current working directory into

        the supplied buffer and return a pointer to the buffer.  If the

        current directory's path doesn't fit in LEN characters, the result

        is NULL and errno is set.

        If pathname is a null pointer, getcwd() will obtain size bytes of

        space using malloc.

BUGS

        Emulated via the getwd() call, which is reasonable for most

        systems that do not have getcwd().

*/

#include "config.h"

#ifdef HAVE_SYS_PARAM_H

#include <sys/param.h>

#endif

#include <errno.h>

extern char *getwd ();

extern int errno;

#ifndef MAXPATHLEN

#define MAXPATHLEN 1024

#endif

char *

getcwd (buf, len)

  char *buf;

  int len;

{

  char ourbuf[MAXPATHLEN];

  char *result;

  result = getwd (ourbuf);

  if (result) {

    if (strlen (ourbuf) >= len) {

      errno = ERANGE;

      return 0;

    }

    if (!buf) {

       buf = (char*)malloc(len);

       if (!buf) {

           errno = ENOMEM;

           return 0;

       }

    }

    strcpy (buf, ourbuf);

  }

  return buf;

}