view toys/posix/uname.c @ 674:7e846e281e38

New build infrastructure to generate FLAG_ macros and TT alias, #define FOR_commandname before #including toys.h to trigger it. Rename DEFINE_GLOBALS() to just GLOBALS() (because I could never remember if it was DECLARE_GLOBALS). Convert existing commands to use new infrastructure, and replace optflag constants with FLAG_ macros where appropriate.
author Rob Landley <>
date Mon, 08 Oct 2012 00:02:30 -0500
parents 6df4ccc0acbe
children fa858a67e231
line wrap: on
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/* vi: set sw=4 ts=4:
 * uname.c - return system name
 * Copyright 2008 Rob Landley <>
 * See


config UNAME
	bool "uname"
	default y
	  usage: uname [-asnrvmpio]

	  Print system information.

	  -s	System name
	  -n	Network (domain) name
	  -r	Release number
	  -v	Version (build date)
	  -m	Machine (hardware) name
	  -a	All of the above

#define FOR_uname
#include "toys.h"

// If a 32 bit x86 build environment working in a chroot under an x86-64
// kernel returns x86_64 for -m it confuses ./configure.  Special case it.

#if defined(__i686__)
#define GROSS "i686"
#elif defined(__i586__)
#define GROSS "i586"
#elif defined(__i486__)
#define GROSS "i486"
#elif defined(__i386__)
#define GROSS "i386"

void uname_main(void)
	int i, flags = toys.optflags, needspace=0;

	uname((void *)toybuf);

	if (!flags) flags = FLAG_s;
	for (i=0; i<5; i++) {
		char *c = toybuf+(65*i);

		if (flags & ((1<<i)|FLAG_a)) {
			int len = strlen(c);

			// This problem originates in autoconf, so of course the solution
			// is horribly ugly.
#ifdef GROSS
			if (i==4 && !strcmp(c,"x86_64")) printf(GROSS);

			if (needspace++) {
				// We can't decrement on the first entry, because
				// needspace would be 0
				*(--c)=' ';
			xwrite(1, c, len);