getcwd.c revision 75584
1/* Copyright (C) 2000 Free Software Foundation, Inc. 2 Written by James Clark (jjc@jclark.com) 3 4This file is part of groff. 5 6groff is free software; you can redistribute it and/or modify it under 7the terms of the GNU General Public License as published by the Free 8Software Foundation; either version 2, or (at your option) any later 9version. 10 11groff is distributed in the hope that it will be useful, but WITHOUT ANY 12WARRANTY; without even the implied warranty of MERCHANTABILITY or 13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14for more details. 15 16You should have received a copy of the GNU General Public License along 17with groff; see the file COPYING. If not, write to the Free Software 18Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 19 20/* Partial emulation of getcwd in terms of getwd. */ 21 22#include <sys/param.h> 23#include <string.h> 24#include <errno.h> 25 26char *getwd(); 27 28char *getcwd(buf, size) 29 char *buf; 30 int size; /* POSIX says this should be size_t */ 31{ 32 if (size <= 0) { 33 errno = EINVAL; 34 return 0; 35 } 36 else { 37 char mybuf[MAXPATHLEN]; 38 int saved_errno = errno; 39 40 errno = 0; 41 if (!getwd(mybuf)) { 42 if (errno == 0) 43 ; /* what to do? */ 44 return 0; 45 } 46 errno = saved_errno; 47 if (strlen(mybuf) + 1 > size) { 48 errno = ERANGE; 49 return 0; 50 } 51 strcpy(buf, mybuf); 52 return buf; 53 } 54} 55