1 /* Copyright (C) 1996-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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/>. */
21 #include <stdio_ext.h>
24 #include <libc-lock.h>
29 /* Path of the file. */
30 static const char default_nss
[] = "/etc/default/nss";
32 /* Flags once read from the file. */
33 static int default_nss_flags
;
35 /* Code to make sure we call 'init' once. */
36 __libc_once_define (static, once
);
38 /* Table of the recognized variables. */
46 #define STRNLEN(s) s, sizeof (s) - 1
47 { STRNLEN ("NETID_AUTHORITATIVE"), NSS_FLAG_NETID_AUTHORITATIVE
},
48 { STRNLEN ("SERVICES_AUTHORITATIVE"), NSS_FLAG_SERVICES_AUTHORITATIVE
},
49 { STRNLEN ("SETENT_BATCH_READ"), NSS_FLAG_SETENT_BATCH_READ
},
50 { STRNLEN ("ADJUNCT_AS_SHADOW"), NSS_FLAG_ADJUNCT_AS_SHADOW
},
52 #define nvars (sizeof (vars) / sizeof (vars[0]))
58 int saved_errno
= errno
;
59 FILE *fp
= fopen (default_nss
, "rce");
65 __fsetlocking (fp
, FSETLOCKING_BYCALLER
);
67 while (!feof_unlocked (fp
))
69 ssize_t n
= getline (&line
, &linelen
, fp
);
77 with arbitrary white spaces. */
82 /* Recognize comment lines. */
87 for (idx
= 0; idx
< nvars
; ++idx
)
88 if (strncmp (cp
, vars
[idx
].name
, vars
[idx
].len
) == 0)
101 if (strncmp (cp
, "TRUE", 4) != 0)
105 while (isspace (*cp
))
109 default_nss_flags
|= vars
[idx
].flag
;
116 __set_errno (saved_errno
);
121 _nsl_default_nss (void)
123 /* If we have not yet read the file yet do it now. */
124 __libc_once (once
, init
);
126 return default_nss_flags
;