/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#define	__EXTENSIONS__
#include <sys/types.h>
#include <stdio.h>
#include <stdio.h>
#include <string.h>
#include <locale.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/fcntl.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include <sys/systeminfo.h>

static void usage(void);

#ifdef	_iBCS2
char *sysv3_env;
#endif	/* _iBCS2 */

/* ARGSUSED */
int
main(int argc, char *argv[], char *envp[])
{
	char *nodename;
	char *optstring = "asnrpvmiS:X";
	int sflg = 0, nflg = 0, rflg = 0, vflg = 0, mflg = 0;
	int pflg = 0, iflg = 0, Sflg = 0;
	int errflg = 0, optlet;
	int Xflg = 0;
#ifdef	_iBCS2
	char *ptr;
	char *newptr;
	int cnt;
	int done;
#endif /* _iBCS2 */
	struct utsname  unstr, *un;
	char fmt_string[] = " %.*s";
	char *fs = &fmt_string[1];
	char procbuf[SYS_NMLN];

	(void) umask(~(S_IRWXU|S_IRGRP|S_IROTH) & S_IAMB);
	un = &unstr;
	(void) uname(un);

#ifdef	_iBCS2
	/* Find out if user wants SYS V behavior */
	if (sysv3_env = getenv("SYSV3")) {

		/*
		 * Now figure out what values are encoded in sysv3
		 * Tokens are comma separated:
		 * os, sysname, nodename, release, version, machtype
		 */
		cnt = 0;
		ptr = sysv3_env;
		done = 0;
		while (!done && *ptr) {
			if ((newptr = strchr(ptr, ',')) == (char *)0)
				done = 1;
			else
				/* Null out the comma */
				*newptr = '\0';

			/* If ptr == newptr, there was no data for this token */
			if (ptr == newptr) {
				/* Step over null token and go around again */
				ptr = newptr + 1;
				cnt ++;
				continue;
			}

			switch (cnt++) {
			case 0:
				/* Ignore the os token for now. */
				break;
			case 1:
				strcpy(un->sysname, ptr);
				break;
			case 2:
				strcpy(un->nodename, ptr);
				break;
			case 3:
				strcpy(un->release, ptr);
				break;
			case 4:
				strcpy(un->version, ptr);
				break;
			case 5:
				strcpy(un->machine, ptr);
				break;
			default:
				done = 1;
				break;
			}
			ptr = newptr + 1;
		}

		/*
		 * If SYSV3 is set to an empty string, fill in the structure
		 * with reasonable default values.
		 */
		if (!cnt) {
			strcpy(un->sysname, un->nodename);
			strcpy(un->release, "3.2");
			strcpy(un->version, "2");
			strcpy(un->machine, "i386");
		}
	}

#endif /* _iBCS2 */

	(void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN)
#define	TEXT_DOMAIN "SYS_TEST"
#endif
	(void) textdomain(TEXT_DOMAIN);

	while ((optlet = getopt(argc, argv, optstring)) != EOF)
		switch (optlet) {
		case 'a':
			sflg++; nflg++; rflg++; vflg++; mflg++;
#ifdef	_iBCS2
			/*
			 * If compat mode, don't print things ISC
			 * doesn't have
			 */
			if (!sysv3_env)
#endif /* _iBCS2 */
			{
				pflg++;
				iflg++;
			}
			break;
		case 's':
			sflg++;
			break;
		case 'n':
			nflg++;
			break;
		case 'r':
			rflg++;
			break;
		case 'v':
			vflg++;
			break;
		case 'm':
			mflg++;
			break;
		case 'p':
			pflg++;
			break;
		case 'i':
			iflg++;
			break;
		case 'S':
			Sflg++;
			nodename = optarg;
			break;
		case 'X':
			Xflg++;
			break;

		case '?':
			errflg++;
		}

	if (errflg || (optind != argc))
		usage();

	if ((Sflg > 1) ||
	    (Sflg && (sflg || nflg || rflg || vflg || mflg || pflg || iflg ||
		Xflg))) {
		usage();
	}

	/* If we're changing the system name */
	if (Sflg) {
		int len = strlen(nodename);

		if (len > SYS_NMLN - 1) {
			(void) fprintf(stderr, gettext(
				"uname: name must be <= %d letters\n"),
				SYS_NMLN-1);
			exit(1);
		}
		if (sysinfo(SI_SET_HOSTNAME, nodename, len) < 0) {
			int err = errno;
			(void) fprintf(stderr, gettext(
				"uname: error in setting name: %s\n"),
				strerror(err));
			exit(1);
		}
		return (0);
	}

	/*
	 * "uname -s" is the default
	 */
	if (!(sflg || nflg || rflg || vflg || mflg || pflg || iflg || Xflg))
		sflg++;
	if (sflg) {
		(void) fprintf(stdout, fs, sizeof (un->sysname),
		    un->sysname);
		fs = fmt_string;
	}
	if (nflg) {
		(void) fprintf(stdout, fs, sizeof (un->nodename), un->nodename);
		fs = fmt_string;
	}
	if (rflg) {
		(void) fprintf(stdout, fs, sizeof (un->release), un->release);
		fs = fmt_string;
	}
	if (vflg) {
		(void) fprintf(stdout, fs, sizeof (un->version), un->version);
		fs = fmt_string;
	}
	if (mflg) {
		(void) fprintf(stdout, fs, sizeof (un->machine), un->machine);
		fs = fmt_string;
	}
	if (pflg) {
		if (sysinfo(SI_ARCHITECTURE, procbuf, sizeof (procbuf)) == -1) {
			(void) fprintf(stderr, gettext(
				"uname: sysinfo failed\n"));
			exit(1);
		}
		(void) fprintf(stdout, fs, strlen(procbuf), procbuf);
		fs = fmt_string;
	}
	if (iflg) {
		if (sysinfo(SI_PLATFORM, procbuf, sizeof (procbuf)) == -1) {
			(void) fprintf(stderr, gettext(
				"uname: sysinfo failed\n"));
			exit(1);
		}
		(void) fprintf(stdout, fs, strlen(procbuf), procbuf);
		fs = fmt_string;
	}
	if (Xflg) {
		int	val;

		(void) fprintf(stdout, "System = %.*s\n", sizeof (un->sysname),
		    un->sysname);
		(void) fprintf(stdout, "Node = %.*s\n", sizeof (un->nodename),
		    un->nodename);
		(void) fprintf(stdout, "Release = %.*s\n", sizeof (un->release),
		    un->release);
		(void) fprintf(stdout, "KernelID = %.*s\n",
		    sizeof (un->version), un->version);
		(void) fprintf(stdout, "Machine = %.*s\n", sizeof (un->machine),
		    un->machine);

		/* Not availible on Solaris so hardcode the output */
		(void) fprintf(stdout, "BusType = <unknown>\n");

		/* Serialization is not supported in 2.6, so hard code output */
		(void) fprintf(stdout, "Serial = <unknown>\n");
		(void) fprintf(stdout, "Users = <unknown>\n");
		(void) fprintf(stdout, "OEM# = 0\n");
		(void) fprintf(stdout, "Origin# = 1\n");

		val = sysconf(_SC_NPROCESSORS_CONF);
		(void) fprintf(stdout, "NumCPU = %d\n", val);
	}
	(void) putchar('\n');
	return (0);
}

static void
usage(void)
{
	{
		(void) fprintf(stderr, gettext(
			"usage:	uname [-snrvmapiX]\n"
			"	uname [-S system_name]\n"));
	}
	exit(1);
}