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gcc/libiberty/getcwd.c
Joseph Myers 7f8fa05dae alloca.c, [...]: Improve manual formatting.
* alloca.c, clock.c, getcwd.c, getpagesize.c, getpwd.c, index.c,
	libiberty.texi, memchr.c, putenv.c, rindex.c, strchr.c, strdup.c,
	strerror.c, strrchr.c, strstr.c, strtod.c, tmpnam.c, vfork.c,
	xatexit.c, xmalloc.c, xstrerror.c: Improve manual formatting.  Fix
	spelling.  Give names to function arguments in documentation.  Use
	(void) prototypes in documentation.
	* functions.texi: Regenerate.

From-SVN: r46068
2001-10-07 22:53:31 +01:00

65 lines
1.2 KiB
C

/* Emulate getcwd using getwd.
This function is in the public domain. */
/*
@deftypefn Supplemental char* getcwd (char *@var{pathname}, int @var{len})
Copy the absolute pathname for the current working directory into
@var{pathname}, which is assumed to point to a buffer of at least
@var{len} bytes, and return a pointer to the buffer. If the current
directory's path doesn't fit in @var{len} characters, the result is
@code{NULL} and @code{errno} is set. If @var{pathname} is a null pointer,
@code{getcwd} will obtain @var{len} bytes of space using
@code{malloc}.
@end deftypefn
*/
#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;
}