usr/src/cmd/lastcomm/lastcomm.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 (c) 1983-2000 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/acctctl.h>
  30 #include <limits.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33 #include <errno.h>
  34
  35 #include "lastcomm.h"
  36
  37 int
  38 main(int argc, char *argv[])
  39 {
  40         int res;
  41         int opt;
  42         char *filename = NULL;
  43         char buf[PATH_MAX];
  44         ea_file_t ef;
  45         int xflag = 0;
  46
  47         while ((opt = getopt(argc, argv, "f:x")) != EOF) {
  48                 switch (opt) {
  49                 case 'f':
  50                         filename = optarg;
  51                         break;
  52                 case 'x':
  53                         xflag = 1;
  54                         break;
  55                 default:
  56                         (void) fprintf(stderr,
  57                             gettext("Usage:\tlastcomm [-x] [-f filename]"
  58                             " [command] ... [user] ... [terminal] ...\n"));
  59                         exit(2);
  60                 }
  61         }
  62
  63         if (xflag) {
  64                 /*
  65                  * User wants to see extended accounting statistics.
  66                  */
  67                 if (filename) {
  68                         return (lc_exacct(filename, argc, argv, optind));
  69                 } else {
  70                         if (acctctl(AC_PROC | AC_FILE_GET, buf, PATH_MAX) < 0) {
  71                                 (void) fprintf(stderr, gettext("lastcomm: "
  72                                     "cannot open extended accounting file: "
  73                                     "%s\n"), strerror(errno));
  74                                 return (1);
  75                         } else {
  76                                 return (lc_exacct(buf, argc, argv, optind));
  77                         }
  78                 }
  79         }
  80         if (filename == NULL) {
  81                 /*
  82                  * If no option is specified, then first try to open current
  83                  * extended process accounting file and then old-style process
  84                  * accounting.
  85                  */
  86                 if (acctctl(AC_PROC | AC_FILE_GET, buf, PATH_MAX) < 0)
  87                         return (lc_pacct("/var/log/pacct", argc, argv, optind));
  88                 else
  89                         return (lc_exacct(buf, argc, argv, optind));
  90         } else {
  91                 /*
  92                  * If accounting file was specified and we don't know its
  93                  * format, then first try to open it as an extended accounting
  94                  * file and then as an old-style accounting file.
  95                  */
  96                 if ((res = ea_open(&ef, filename, EXACCT_CREATOR,
  97                     EO_TAIL | EO_VALID_HDR, O_RDONLY, 0)) >= 0)
  98                         (void) ea_close(&ef);
  99
 100                 if (res < 0)
 101                         return (lc_pacct(filename, argc, argv, optind));
 102                 else
 103                         return (lc_exacct(filename, argc, argv, optind));
 104         }
 105 }