usr/src/cmd/isalist/isalist.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <stdio.h>
  30 #include <sys/types.h>
  31 #include <stdlib.h>
  32 #include <errno.h>
  33 #include <sys/systeminfo.h>
  34
  35 /*ARGSUSED*/
  36 int
  37 main(int argc, char *argv[])
  38 {
  39
  40         char buffer[BUFSIZ];
  41         char *buf = buffer;
  42         int ret = 0;
  43         size_t bufsize = BUFSIZ;
  44
  45         ret = sysinfo(SI_ISALIST, buf, bufsize);
  46         if (ret == -1) {
  47                         perror("isalist");
  48                         exit(1);
  49         } else if (ret > bufsize) {
  50
  51                 /* We lost some because our buffer wasn't big enuf */
  52                 buf = malloc(bufsize = ret);
  53                 if (buf == NULL) {
  54                         errno = ENOMEM;
  55                         perror("isalist");
  56                         exit(1);
  57                 }
  58                 ret = sysinfo(SI_ISALIST, buf, bufsize);
  59                 if (ret == -1) {
  60                         perror("isalist");
  61                         exit(1);
  62                 }
  63         }
  64         (void) printf("%s\n", buf);
  65         return (0);
  66
  67
  68 }