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2004-02-25  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/sysconf.c (__sysconf): Handle
	_SC_NGROUPS_MAX.
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Ulrich Drepper
2004-02-25 23:28:54 +00:00
parent 25b8e63c0a
commit d024596d61
2 changed files with 41 additions and 2 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2004-02-25 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/sysconf.c (__sysconf): Handle
_SC_NGROUPS_MAX.
2004-02-23 Jakub Jelinek <jakub@redhat.com> 2004-02-23 Jakub Jelinek <jakub@redhat.com>
* wcsmbs/mbrtowc.c (__mbrtowc): Cap s + n at the end of address space. * wcsmbs/mbrtowc.c (__mbrtowc): Cap s + n at the end of address space.

38
sysdeps/unix/sysv/linux/sysconf.c
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@ -1,5 +1,5 @@
/* Get file-specific information about a file. Linux version. /* Get file-specific information about a file. Linux version.
Copyright (C) 2003 Free Software Foundation, Inc. Copyright (C) 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or The GNU C Library is free software; you can redistribute it and/or
@ -17,6 +17,7 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */ 02111-1307 USA. */
#include <fcntl.h>
#include <sysdep.h> #include <sysdep.h>
#include <time.h> #include <time.h>
#include <unistd.h> #include <unistd.h>
@ -46,7 +47,40 @@ __sysconf (int name)
} }
#endif #endif
case _SC_NGROUPS_MAX:
{
/* Try to read the information from the /proc/sys/kernel/ngroups_max
file. */
int fd = __open ("/proc/sys/kernel/ngroups_max", O_RDONLY);
if (fd != -1)
{
/* This is more than enough, the file contains a single
integer. */
char buf[32];
long int res = -1l;
ssize_t n = __read (fd, buf, sizeof (buf) - 1);
if (n > 0)
{
/* Terminate the string. */
buf[n] = '\0';
char *endp;
res = strtol (buf, &endp, 10);
if (endp == buf || (*endp != '\0' && *endp != '\n'))
res = -1l;
}
__close (fd);
if (res != -1)
return res;
}
}
break;
default: default:
return posix_sysconf (name); break;
} }
return posix_sysconf (name);
} }