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uname.c revision 1.5 
      1 /*
      2  * Copyright (c) 1994 Winning Strategies, Inc.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *      This product includes software developed by Winning Strategies, Inc.
     16  * 4. The name of Winning Strategies, Inc. may not be used to endorse or
     17  *    promote products derived from this software without specific prior
     18  *    written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef lint
     33 static char rcsid[] = "$Id: uname.c,v 1.5 1994/01/29 01:43:43 jtc Exp $";
     34 #endif /* not lint */
     35 
     36 #include <stdio.h>
     37 #include <locale.h>
     38 #include <unistd.h>
     39 #include <sys/utsname.h>
     40 
     41 static void usage();
     42 
     43 #define PRINT_SYSNAME	0x01
     44 #define PRINT_NODENAME	0x02
     45 #define PRINT_RELEASE	0x04
     46 #define PRINT_VERSION	0x08
     47 #define PRINT_MACHINE	0x10
     48 #define PRINT_ALL	0x1f
     49 
     50 int
     51 main(argc, argv)
     52 	int argc;
     53 	char **argv;
     54 {
     55 	struct utsname u;
     56 	int c;
     57 	int space = 0;
     58 	int print_mask = 0;
     59 
     60 	setlocale(LC_ALL, "");
     61 
     62 	while ((c = getopt(argc,argv,"amnrsv")) != -1 ) {
     63 		switch ( c ) {
     64 		case 'a':
     65 			print_mask = PRINT_ALL;
     66 			break;
     67 		case 'm':
     68 			print_mask = PRINT_MACHINE;
     69 			break;
     70 		case 'n':
     71 			print_mask = PRINT_NODENAME;
     72 			break;
     73 		case 'r':
     74 			print_mask = PRINT_RELEASE;
     75 			break;
     76 		case 's':
     77 			print_mask = PRINT_SYSNAME;
     78 			break;
     79 		case 'v':
     80 			print_mask = PRINT_VERSION;
     81 			break;
     82 		default:
     83 			usage();
     84 			/* NOTREACHED */
     85 		}
     86 	}
     87 
     88 	if (optind != argc) {
     89 		usage();
     90 		/* NOTREACHED */
     91 	}
     92 
     93 	if (!print_mask) {
     94 		print_mask = PRINT_SYSNAME;
     95 	}
     96 
     97 	if (uname(&u)) {
     98 		err(1, NULL);
     99 		/* NOTREACHED */
    100 	}
    101 
    102 	if (print_mask & PRINT_SYSNAME) {
    103 		space++;
    104 		fputs(u.sysname, stdout);
    105 	}
    106 	if (print_mask & PRINT_NODENAME) {
    107 		if (space++) putchar(' ');
    108 		fputs(u.nodename, stdout);
    109 	}
    110 	if (print_mask & PRINT_RELEASE) {
    111 		if (space++) putchar(' ');
    112 		fputs(u.release, stdout);
    113 	}
    114 	if (print_mask & PRINT_VERSION) {
    115 		if (space++) putchar(' ');
    116 		fputs(u.version, stdout);
    117 	}
    118 	if (print_mask & PRINT_MACHINE) {
    119 		if (space++) putchar(' ');
    120 		fputs(u.machine, stdout);
    121 	}
    122 	putchar('\n');
    123 
    124 	exit(0);
    125 	/* NOTREACHED */
    126 }
    127 
    128 static void
    129 usage()
    130 {
    131 	fprintf(stderr, "usage: uname [-amnrsv]\n");
    132 	exit(1);
    133 }
    134