71 lines
1.3 KiB
C
71 lines
1.3 KiB
C
/* 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>
|
|
#ifdef HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif
|
|
#ifdef HAVE_STDLIB_H
|
|
#include <stdlib.h>
|
|
#endif
|
|
|
|
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;
|
|
}
|