gshadow/putsgent.c

   1 /* Copyright (C) 2009 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stdbool.h>
  19 #include <stdio.h>
  20 #include <gshadow.h>
  21
  22 #define _S(x)   x ? x : ""
  23
  24
  25 /* Write an entry to the given stream.
  26    This must know the format of the group file.  */
  27 int
  28 putsgent (const struct sgrp *g, FILE *stream)
  29 {
  30   int errors = 0;
  31
  32   _IO_flockfile (stream);
  33
  34   if (fprintf (stream, "%s:%s:", g->sg_namp, _S (g->sg_passwd)) < 0)
  35     ++errors;
  36
  37   bool first = true;
  38   char **sp = g->sg_adm;
  39   if (sp != NULL)
  40     while (*sp != NULL)
  41       {
  42         if (fprintf (stream, "%s%s", first ? "" : ",", *sp++) < 0)
  43           {
  44             ++errors;
  45             break;
  46           }
  47         first = false;
  48       }
  49   if (putc_unlocked (':', stream) == EOF)
  50     ++errors;
  51
  52   first = true;
  53   sp = g->sg_mem;
  54   if (sp != NULL)
  55     while (*sp != NULL)
  56       {
  57         if (fprintf (stream, "%s%s", first ? "" : ",", *sp++) < 0)
  58           {
  59             ++errors;
  60             break;
  61           }
  62         first = false;
  63       }
  64   if (putc_unlocked ('\n', stream) == EOF)
  65     ++errors;
  66
  67   _IO_funlockfile (stream);
  68
  69   return errors ? -1 : 0;
  70 }