Whitespace fix.
[glibc.git] / nis / nss-default.c
blobd7a3293a49dc8f7f890faf17d98f3f610d661b56
1 /* Copyright (C) 1996,2001,2004,2006,2007,2010 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, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <ctype.h>
20 #include <errno.h>
21 #include <stdio.h>
22 #include <stdio_ext.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <bits/libc-lock.h>
27 #include <libnsl.h>
30 /* Path of the file. */
31 static const char default_nss[] = "/etc/default/nss";
33 /* Flags once read from the file. */
34 static int default_nss_flags;
36 /* Code to make sure we call 'init' once. */
37 __libc_once_define (static, once);
39 /* Table of the recognized variables. */
40 static const struct
42 char name[23];
43 unsigned int len;
44 int flag;
45 } vars[] =
47 #define STRNLEN(s) s, sizeof (s) - 1
48 { STRNLEN ("NETID_AUTHORITATIVE"), NSS_FLAG_NETID_AUTHORITATIVE },
49 { STRNLEN ("SERVICES_AUTHORITATIVE"), NSS_FLAG_SERVICES_AUTHORITATIVE },
50 { STRNLEN ("SETENT_BATCH_READ"), NSS_FLAG_SETENT_BATCH_READ },
51 { STRNLEN ("ADJUNCT_AS_SHADOW"), NSS_FLAG_ADJUNCT_AS_SHADOW },
53 #define nvars (sizeof (vars) / sizeof (vars[0]))
56 static void
57 init (void)
59 int saved_errno = errno;
60 FILE *fp = fopen (default_nss, "rc");
61 if (fp != NULL)
63 char *line = NULL;
64 size_t linelen = 0;
66 __fsetlocking (fp, FSETLOCKING_BYCALLER);
68 while (!feof_unlocked (fp))
70 ssize_t n = getline (&line, &linelen, fp);
71 if (n <= 0)
72 break;
74 /* Recognize only
76 <THE-VARIABLE> = TRUE
78 with arbitrary white spaces. */
79 char *cp = line;
80 while (isspace (*cp))
81 ++cp;
83 /* Recognize comment lines. */
84 if (*cp == '#')
85 continue;
87 int idx;
88 for (idx = 0; idx < nvars; ++idx)
89 if (strncmp (cp, vars[idx].name, vars[idx].len) == 0)
90 break;
91 if (idx == nvars)
92 continue;
94 cp += vars[idx].len;
95 while (isspace (*cp))
96 ++cp;
97 if (*cp++ != '=')
98 continue;
99 while (isspace (*cp))
100 ++cp;
102 if (strncmp (cp, "TRUE", 4) != 0)
103 continue;
104 cp += 4;
106 while (isspace (*cp))
107 ++cp;
109 if (*cp == '\0')
110 default_nss_flags |= vars[idx].flag;
113 free (line);
115 fclose (fp);
117 __set_errno (saved_errno);
122 _nsl_default_nss (void)
124 /* If we have not yet read the file yet do it now. */
125 __libc_once (once, init);
127 return default_nss_flags;