02-06-2008
To know the standard
Dear all,
I have a need to find the standard of my system such as POSIX.
How can I know that. Is there any way to find it.
I am using GNU/Linux.
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LEARN ABOUT X11R4
confstr
CONFSTR(3) Linux Programmer's Manual CONFSTR(3)
NAME
confstr - get configuration dependent string variables
SYNOPSIS
#include <unistd.h>
size_t confstr(int name, char *buf, size_t len);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
confstr(): _POSIX_C_SOURCE >= 2 || _XOPEN_SOURCE
DESCRIPTION
confstr() gets the value of configuration-dependent string variables.
The name argument is the system variable to be queried. The following variables are supported:
_CS_GNU_LIBC_VERSION (GNU C library only; since glibc 2.3.2)
A string which identifies the GNU C library version on this system (e.g., "glibc 2.3.4").
_CS_GNU_LIBPTHREAD_VERSION (GNU C library only; since glibc 2.3.2)
A string which identifies the POSIX implementation supplied by this C library (e.g., "NPTL 2.3.4" or "linuxthreads-0.10").
_CS_PATH
A value for the PATH variable which indicates where all the POSIX.2 standard utilities can be found.
If buf is not NULL and len is not zero, confstr() copies the value of the string to buf truncated to len - 1 bytes if necessary, with a
null byte ('