src/libs/libgroff/getcwd.c

   1 /* Copyright (C) 2000 Free Software Foundation, Inc.
   2      Written by James Clark (jjc@jclark.com)
   3
   4 This file is part of groff.
   5
   6 groff is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License along
  17 with groff; see the file COPYING.  If not, write to the Free Software
  18 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, 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
  26 char *getwd();
  27
  28 char *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 }