usr/src/cmd/lastcomm/lc_pacct.c

   1 /*
   2  * Copyright (c) 1980 Regents of the University of California.
   3  * All rights reserved. The Berkeley software License Agreement
   4  * specifies the terms and conditions for redistribution.
   5  *
   6  * Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
   7  * All rights reserved.
   8  *
   9  *
  10  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  11  * Use is subject to license terms.
  12  */
  13
  14 #pragma ident   "%Z%%M% %I%     %E% SMI"
  15
  16 #include "lastcomm.h"
  17
  18 /*
  19  * lc_pacct() provides the functionality of lastcomm when applied to the basic
  20  * SVR4 accounting file, /var/log/pacct.  Definitions for this accounting file
  21  * format are given in <sys/acct.h>.
  22  */
  23
  24 extern ulong_t expand(comp_t);
  25
  26 static int
  27 ok(int argc, char *argv[], int index, struct acct *acp)
  28 {
  29         int j;
  30
  31         for (j = index; j < argc; j++)
  32                 if (strcmp(getname(acp->ac_uid), argv[j]) &&
  33                     strcmp(getdev(acp->ac_tty), argv[j]) &&
  34                     strncmp(acp->ac_comm, argv[j], fldsiz(acct, ac_comm)))
  35                         break;
  36         return (j == argc);
  37 }
  38
  39 int
  40 lc_pacct(char *name, int argc, char *argv[], int index)
  41 {
  42         struct acct buf[NACCT];
  43         int bn, cc;
  44         struct acct *acp;
  45         struct stat sb;
  46         time_t t;
  47         int fd;
  48
  49         if ((fd = open(name, O_RDONLY)) < 0) {
  50                 perror(name);
  51                 return (1);
  52         }
  53
  54         (void) fstat(fd, &sb);
  55
  56         if (sb.st_size % sizeof (struct acct)) {
  57                 (void) fprintf(stderr, gettext("lastcomm: accounting file"
  58                     " is corrupted\n"));
  59                 return (1);
  60         }
  61
  62         for (bn = ((unsigned)sb.st_size / BUF_SIZ) + 1; bn >= 0; bn--) {
  63                 if (lseek(fd, (unsigned)bn * BUF_SIZ, 0) == -1) {
  64                         perror("lseek");
  65                         return (1);
  66                 }
  67                 cc = read(fd, buf, BUF_SIZ);
  68                 if (cc < 0) {
  69                         perror("read");
  70                         return (1);
  71                 }
  72                 acp = buf + (cc / sizeof (buf[0])) - 1;
  73                 for (; acp >= buf; acp--) {
  74                         char *cp;
  75                         ulong_t x;
  76
  77                         if (acp->ac_flag > 0100) {
  78                                 (void) fprintf(stderr, gettext("lastcomm: "
  79                                     "accounting file is corrupted\n"));
  80                                 return (1);
  81                         }
  82                         if (acp->ac_comm[0] == '\0')
  83                                 (void) strcpy(acp->ac_comm, "?");
  84                         for (cp = &acp->ac_comm[0];
  85                             cp < &acp->ac_comm[fldsiz(acct, ac_comm)] && *cp;
  86                             cp++)
  87                                 if (!isascii(*cp) || iscntrl(*cp))
  88                                         *cp = '?';
  89                         if (argc > index && !ok(argc, argv, index, acp))
  90                                 continue;
  91                         x = expand(acp->ac_utime) + expand(acp->ac_stime);
  92                         t = acp->ac_btime;
  93                         (void) printf("%-*.*s %s %-*s %-*s %6.2f secs %.16s\n",
  94                             fldsiz(acct, ac_comm), fldsiz(acct, ac_comm),
  95                             acp->ac_comm,
  96                             flagbits(acp->ac_flag),
  97                             NMAX, getname(acp->ac_uid),
  98                             LMAX, getdev(acp->ac_tty),
  99                             x / (double)HZ, ctime(&t));
 100                 }
 101         }
 102         return (0);
 103 }