mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-15 04:20:28 +08:00
130 lines
3.0 KiB
C
130 lines
3.0 KiB
C
/* Copyright (C) 1996,2001,2004,2006,2007,2010,2011
|
|
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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdio_ext.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <bits/libc-lock.h>
|
|
|
|
#include <libnsl.h>
|
|
|
|
|
|
/* Path of the file. */
|
|
static const char default_nss[] = "/etc/default/nss";
|
|
|
|
/* Flags once read from the file. */
|
|
static int default_nss_flags;
|
|
|
|
/* Code to make sure we call 'init' once. */
|
|
__libc_once_define (static, once);
|
|
|
|
/* Table of the recognized variables. */
|
|
static const struct
|
|
{
|
|
char name[23];
|
|
unsigned int len;
|
|
int flag;
|
|
} vars[] =
|
|
{
|
|
#define STRNLEN(s) s, sizeof (s) - 1
|
|
{ STRNLEN ("NETID_AUTHORITATIVE"), NSS_FLAG_NETID_AUTHORITATIVE },
|
|
{ STRNLEN ("SERVICES_AUTHORITATIVE"), NSS_FLAG_SERVICES_AUTHORITATIVE },
|
|
{ STRNLEN ("SETENT_BATCH_READ"), NSS_FLAG_SETENT_BATCH_READ },
|
|
{ STRNLEN ("ADJUNCT_AS_SHADOW"), NSS_FLAG_ADJUNCT_AS_SHADOW },
|
|
};
|
|
#define nvars (sizeof (vars) / sizeof (vars[0]))
|
|
|
|
|
|
static void
|
|
init (void)
|
|
{
|
|
int saved_errno = errno;
|
|
FILE *fp = fopen (default_nss, "rce");
|
|
if (fp != NULL)
|
|
{
|
|
char *line = NULL;
|
|
size_t linelen = 0;
|
|
|
|
__fsetlocking (fp, FSETLOCKING_BYCALLER);
|
|
|
|
while (!feof_unlocked (fp))
|
|
{
|
|
ssize_t n = getline (&line, &linelen, fp);
|
|
if (n <= 0)
|
|
break;
|
|
|
|
/* Recognize only
|
|
|
|
<THE-VARIABLE> = TRUE
|
|
|
|
with arbitrary white spaces. */
|
|
char *cp = line;
|
|
while (isspace (*cp))
|
|
++cp;
|
|
|
|
/* Recognize comment lines. */
|
|
if (*cp == '#')
|
|
continue;
|
|
|
|
int idx;
|
|
for (idx = 0; idx < nvars; ++idx)
|
|
if (strncmp (cp, vars[idx].name, vars[idx].len) == 0)
|
|
break;
|
|
if (idx == nvars)
|
|
continue;
|
|
|
|
cp += vars[idx].len;
|
|
while (isspace (*cp))
|
|
++cp;
|
|
if (*cp++ != '=')
|
|
continue;
|
|
while (isspace (*cp))
|
|
++cp;
|
|
|
|
if (strncmp (cp, "TRUE", 4) != 0)
|
|
continue;
|
|
cp += 4;
|
|
|
|
while (isspace (*cp))
|
|
++cp;
|
|
|
|
if (*cp == '\0')
|
|
default_nss_flags |= vars[idx].flag;
|
|
}
|
|
|
|
free (line);
|
|
|
|
fclose (fp);
|
|
}
|
|
__set_errno (saved_errno);
|
|
}
|
|
|
|
|
|
int
|
|
_nsl_default_nss (void)
|
|
{
|
|
/* If we have not yet read the file yet do it now. */
|
|
__libc_once (once, init);
|
|
|
|
return default_nss_flags;
|
|
}
|