about summary refs log tree commit diff
path: root/gshadow/putsgent.c
blob: 03f9d105ec19a52e241899bb369a90fb30a85572 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
/* Copyright (C) 2009-2016 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <gshadow.h>
#include <nss.h>

#define _S(x)	x ? x : ""


/* Write an entry to the given stream.
   This must know the format of the group file.  */
int
putsgent (const struct sgrp *g, FILE *stream)
{
  int errors = 0;

  if (g->sg_namp == NULL || !__nss_valid_field (g->sg_namp)
      || !__nss_valid_field (g->sg_passwd)
      || !__nss_valid_list_field (g->sg_adm)
      || !__nss_valid_list_field (g->sg_mem))
    {
      __set_errno (EINVAL);
      return -1;
    }

  _IO_flockfile (stream);

  if (fprintf (stream, "%s:%s:", g->sg_namp, _S (g->sg_passwd)) < 0)
    ++errors;

  bool first = true;
  char **sp = g->sg_adm;
  if (sp != NULL)
    while (*sp != NULL)
      {
	if (fprintf (stream, "%s%s", first ? "" : ",", *sp++) < 0)
	  {
	    ++errors;
	    break;
	  }
	first = false;
      }
  if (putc_unlocked (':', stream) == EOF)
    ++errors;

  first = true;
  sp = g->sg_mem;
  if (sp != NULL)
    while (*sp != NULL)
      {
	if (fprintf (stream, "%s%s", first ? "" : ",", *sp++) < 0)
	  {
	    ++errors;
	    break;
	  }
	first = false;
      }
  if (putc_unlocked ('\n', stream) == EOF)
    ++errors;

  _IO_funlockfile (stream);

  return errors ? -1 : 0;
}