getcwd.c revision 33965 
1/* Emulate getcwd using getwd.
2   This function is in the public domain. */
3
4/*
5NAME
6	getcwd -- get absolute pathname for current working directory
7
8SYNOPSIS
9	char *getcwd (char pathname[len], len)
10
11DESCRIPTION
12	Copy the absolute pathname for the current working directory into
13	the supplied buffer and return a pointer to the buffer.  If the
14	current directory's path doesn't fit in LEN characters, the result
15	is NULL and errno is set.
16
17BUGS
18	Emulated via the getwd() call, which is reasonable for most
19	systems that do not have getcwd().
20
21*/
22
23#ifndef NO_SYS_PARAM_H
24#include <sys/param.h>
25#endif
26#include <errno.h>
27
28extern char *getwd ();
29extern int errno;
30
31#ifndef MAXPATHLEN
32#define MAXPATHLEN 1024
33#endif
34
35char *
36getcwd (buf, len)
37  char *buf;
38  int len;
39{
40  char ourbuf[MAXPATHLEN];
41  char *result;
42
43  result = getwd (ourbuf);
44  if (result) {
45    if (strlen (ourbuf) >= len) {
46      errno = ERANGE;
47      return 0;
48    }
49    strcpy (buf, ourbuf);
50  }
51  return buf;
52}
53