source3/lib/util_file.c

   1 /*
   2  * Unix SMB/CIFS implementation.
   3  * SMB parameters and setup
   4  * Copyright (C) Andrew Tridgell 1992-1998 Modified by Jeremy Allison 1995.
   5  *
   6  * This program 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 3 of the License, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "includes.h"
  21 #include "lib/sys_rw.h"
  22
  23 /**
  24  Load from a pipe into memory.
  25 **/
  26
  27 static char *file_pload(const char *syscmd, size_t *size)
  28 {
  29         int fd, n;
  30         char *p;
  31         char buf[1024];
  32         size_t total;
  33
  34         fd = sys_popen(syscmd);
  35         if (fd == -1) {
  36                 return NULL;
  37         }
  38
  39         p = NULL;
  40         total = 0;
  41
  42         while ((n = sys_read(fd, buf, sizeof(buf))) > 0) {
  43                 p = talloc_realloc(NULL, p, char, total + n + 1);
  44                 if (!p) {
  45                         DEBUG(0,("file_pload: failed to expand buffer!\n"));
  46                         close(fd);
  47                         return NULL;
  48                 }
  49                 memcpy(p+total, buf, n);
  50                 total += n;
  51         }
  52
  53         if (p) {
  54                 p[total] = 0;
  55         }
  56
  57         /* FIXME: Perhaps ought to check that the command completed
  58          * successfully (returned 0); if not the data may be
  59          * truncated. */
  60         sys_pclose(fd);
  61
  62         if (size) {
  63                 *size = total;
  64         }
  65
  66         return p;
  67 }
  68
  69
  70
  71 /**
  72  Load a pipe into memory and return an array of pointers to lines in the data
  73  must be freed with TALLOC_FREE.
  74 **/
  75
  76 char **file_lines_pload(const char *syscmd, int *numlines)
  77 {
  78         char *p;
  79         size_t size;
  80
  81         p = file_pload(syscmd, &size);
  82         if (!p) {
  83                 return NULL;
  84         }
  85
  86         return file_lines_parse(p, size, numlines, NULL);
  87 }