about summary refs log tree commit diff
path: root/gshadow/fgetsgent_r.c
blob: f1d06503338ae9877449c86af4136d19d07834f6 (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
/* Copyright (C) 2009-2017 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 <ctype.h>
#include <errno.h>
#include <gshadow.h>
#include <stdio.h>

/* Define a line parsing function using the common code
   used in the nss_files module.  */

#define STRUCTURE	sgrp
#define ENTNAME		sgent
#define	EXTERN_PARSER	1
struct sgent_data {};

#include <nss/nss_files/files-parse.c>


/* Read one shadow entry from the given stream.  */
int
__fgetsgent_r (FILE *stream, struct sgrp *resbuf, char *buffer, size_t buflen,
	       struct sgrp **result)
{
  char *p;

  _IO_flockfile (stream);
  do
    {
      buffer[buflen - 1] = '\xff';
      p = fgets_unlocked (buffer, buflen, stream);
      if (p == NULL && feof_unlocked (stream))
	{
	  _IO_funlockfile (stream);
	  *result = NULL;
	  __set_errno (ENOENT);
	  return errno;
	}
      if (p == NULL || buffer[buflen - 1] != '\xff')
	{
	  _IO_funlockfile (stream);
	  *result = NULL;
	  __set_errno (ERANGE);
	  return errno;
	}

      /* Skip leading blanks.  */
      while (isspace (*p))
	++p;
    } while (*p == '\0' || *p == '#' ||	/* Ignore empty and comment lines.  */
	     /* Parse the line.  If it is invalid, loop to
		get the next line of the file to parse.  */
	     ! parse_line (buffer, (void *) resbuf, (void *) buffer, buflen,
			   &errno));

  _IO_funlockfile (stream);

  *result = resbuf;
  return 0;
}
weak_alias (__fgetsgent_r, fgetsgent_r)