Line data    Source code

       1             : /* zmapfd - read contents of file descriptor into a newly-allocated buffer */
       2             : 
       3             : /* Copyright (C) 2006 Free Software Foundation, Inc.
       4             : 
       5             :    This file is part of GNU Bash, the Bourne Again SHell.
       6             : 
       7             :    Bash is free software: you can redistribute it and/or modify
       8             :    it under the terms of the GNU General Public License as published by
       9             :    the Free Software Foundation, either version 3 of the License, or
      10             :    (at your option) any later version.
      11             : 
      12             :    Bash is distributed in the hope that it will be useful,
      13             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15             :    GNU General Public License for more details.
      16             : 
      17             :    You should have received a copy of the GNU General Public License
      18             :    along with Bash.  If not, see <http://www.gnu.org/licenses/>.
      19             : */
      20             : 
      21             : #include <config.h>
      22             : 
      23             : #include <sys/types.h>
      24             : 
      25             : #if defined (HAVE_UNISTD_H)
      26             : #  include <unistd.h>
      27             : #endif
      28             : 
      29             : #include <errno.h>
      30             : 
      31             : #include "bashansi.h"
      32             : #include "command.h"
      33             : #include "general.h"
      34             : 
      35             : #if !defined (errno)
      36             : extern int errno;
      37             : #endif
      38             : 
      39             : extern ssize_t zread __P((int, char *, size_t));
      40             : 
      41             : /* Dump contents of file descriptor FD to *OSTR.  FN is the filename for
      42             :    error messages (not used right now). */
      43             : int
      44           0 : zmapfd (fd, ostr, fn)
      45             :      int fd;
      46             :      char **ostr;
      47             :      char *fn;
      48             : {
      49           0 :   ssize_t nr;
      50           0 :   int rval;
      51           0 :   char lbuf[128];
      52           0 :   char *result;
      53           0 :   int rsize, rind;
      54             : 
      55           0 :   rval = 0;
      56           0 :   result = (char *)xmalloc (rsize = 64);
      57           0 :   rind = 0;
      58             : 
      59           0 :   while (1)
      60             :     {
      61           0 :       nr = zread (fd, lbuf, sizeof (lbuf));
      62           0 :       if (nr == 0)
      63             :         {
      64           0 :           rval = rind;
      65           0 :           break;
      66             :         }
      67           0 :       else if (nr < 0)
      68             :         {
      69           0 :           free (result);
      70           0 :           if (ostr)
      71           0 :             *ostr = (char *)NULL;
      72           0 :           return -1;
      73             :         }
      74             : 
      75           0 :       RESIZE_MALLOCED_BUFFER (result, rind, nr, rsize, 128);
      76           0 :       memcpy (result+rind, lbuf, nr);
      77           0 :       rind += nr;
      78             :     }
      79             : 
      80           0 :   RESIZE_MALLOCED_BUFFER (result, rind, 1, rsize, 128);
      81           0 :   result[rind] = '\0';
      82             : 
      83           0 :   if (ostr)
      84           0 :     *ostr = result;
      85             :   else
      86           0 :     free (result);
      87             : 
      88             :   return rval;
      89             : }