gnu/dist/groff/src/libs/libgroff/getcwd.c

   1 /*      $NetBSD$        */
   2
   3 /* Copyright (C) 2000 Free Software Foundation, Inc.
   4      Written by James Clark (jjc@jclark.com)
   5
   6 This file is part of groff.
   7
   8 groff is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 2, or (at your option) any later
  11 version.
  12
  13 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License along
  19 with groff; see the file COPYING.  If not, write to the Free Software
  20 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  21
  22 /* Partial emulation of getcwd in terms of getwd. */
  23
  24 #include <sys/param.h>
  25 #include <string.h>
  26 #include <errno.h>
  27
  28 char *getwd();
  29
  30 char *getcwd(buf, size)
  31      char *buf;
  32      int size;                  /* POSIX says this should be size_t */
  33 {
  34   if (size <= 0) {
  35     errno = EINVAL;
  36     return 0;
  37   }
  38   else {
  39     char mybuf[MAXPATHLEN];
  40     int saved_errno = errno;
  41
  42     errno = 0;
  43     if (!getwd(mybuf)) {
  44       if (errno == 0)
  45         ;       /* what to do? */
  46       return 0;
  47     }
  48     errno = saved_errno;
  49     if (strlen(mybuf) + 1 > size) {
  50       errno = ERANGE;
  51       return 0;
  52     }
  53     strcpy(buf, mybuf);
  54     return buf;
  55   }
  56 }