suvreq.c

Advanced UNIX Programming is the long-awaited (19 years!) update to the 1985 original. Maybe "update

/*
	Asking the system what it has
	AUP2, Sec. 1.05.3

	Copyright 2003 by Marc J. Rochkind. All rights reserved.
	May be copied only for purposes and under conditions described
	on the Web page www.basepath.com/aup/copyright.htm.

	The Example Files are provided "as is," without any warranty;
	without even the implied warranty of merchantability or fitness
	for a particular purpose. The author and his publisher are not
	responsible for any damages, direct or incidental, resulting
	from the use or non-use of these Example Files.

	The Example Files may contain defects, and some contain deliberate
	coding mistakes that were included for educational reasons.
	You are responsible for determining if and how the Example Files
	are to be used.

*/
#define SUV_SUS2

#if 1
#include "suvreq.h"
#endif
#include <unistd.h>
#include <stdio.h>

int main(void)
{
	printf("Request:\n");

#ifdef _POSIX_SOURCE
	printf("\t_POSIX_SOURCE defined\n");
	printf("\t_POSIX_C_SOURCE = %ld\n", (long)_POSIX_C_SOURCE);
#else
	printf("\t_POSIX_SOURCE undefined\n");
#endif

#ifdef _XOPEN_SOURCE
	#if _XOPEN_SOURCE == 0
		printf("\t_XOPEN_SOURCE defined (0 or no value)\n");
	#else
		printf("\t_XOPEN_SOURCE = %d\n", _XOPEN_SOURCE);
	#endif
#else
	printf("\t_XOPEN_SOURCE undefined\n");
#endif

#ifdef _XOPEN_SOURCE_EXTENDED
	printf("\t_XOPEN_SOURCE_EXTENDED defined\n");
#else
	printf("\t_XOPEN_SOURCE_EXTENDED undefined\n");
#endif

	printf("Claims:\n");
#ifdef _POSIX_VERSION
	printf("\t_POSIX_VERSION = %ld\n", (long)_POSIX_VERSION);
#else
	printf("\tNot POSIX\n");
#endif

#ifdef _XOPEN_UNIX
	printf("\tX/Open\n");
	#ifdef _XOPEN_VERSION
		printf("\t_XOPEN_VERSION = %d\n", _XOPEN_VERSION);
	#else
		printf("\tError: _XOPEN_UNIX defined, but not _XOPEN_VERSION\n");
	#endif
#else
	printf("\tNot X/Open\n");
#endif

	return 0;


}