usr.bin/lastcomm/lastcomm.c

   1 /*
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 1980, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/param.h>
  33 #include <sys/stat.h>
  34 #include <sys/acct.h>
  35
  36 #include <ctype.h>
  37 #include <err.h>
  38 #include <errno.h>
  39 #include <pwd.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <time.h>
  44 #include <unistd.h>
  45 #include "pathnames.h"
  46
  47 /*XXX*/#include <inttypes.h>
  48
  49 time_t   expand(u_int);
  50 char    *flagbits(int);
  51 const    char *getdev(dev_t);
  52 int      readrec_forward(FILE *f, struct acctv3 *av3);
  53 int      readrec_backward(FILE *f, struct acctv3 *av3);
  54 int      requested(char *[], struct acctv3 *);
  55 static   void usage(void);
  56
  57 #define AC_UTIME 1 /* user */
  58 #define AC_STIME 2 /* system */
  59 #define AC_ETIME 4 /* elapsed */
  60 #define AC_CTIME 8 /* user + system time, default */
  61
  62 #define AC_BTIME 16 /* starting time */
  63 #define AC_FTIME 32 /* exit time (starting time + elapsed time )*/
  64
  65 int
  66 main(int argc, char *argv[])
  67 {
  68         struct acctv3 ab;
  69         char *p;
  70         FILE *fp;
  71         int (*readrec)(FILE *f, struct acctv3 *av3);
  72         time_t t;
  73         int ch, rv;
  74         const char *acctfile, *format;
  75         char buf[1024];
  76         int flags = 0;
  77
  78         acctfile = _PATH_ACCT;
  79         format = NULL;
  80         while ((ch = getopt(argc, argv, "f:usecSE")) != -1)
  81                 switch((char)ch) {
  82                 case 'f':
  83                         acctfile = optarg;
  84                         break;
  85
  86                 case 'u':
  87                         flags |= AC_UTIME; /* user time */
  88                         break;
  89                 case 's':
  90                         flags |= AC_STIME; /* system time */
  91                         break;
  92                 case 'e':
  93                         flags |= AC_ETIME; /* elapsed time */
  94                         break;
  95                 case 'c':
  96                         flags |= AC_CTIME; /* user + system time */
  97                         break;
  98
  99                 case 'S':
 100                         flags |= AC_BTIME; /* starting time */
 101                         break;
 102                 case 'E':
 103                         /* exit time (starting time + elapsed time )*/
 104                         flags |= AC_FTIME;
 105                         break;
 106
 107                 case '?':
 108                 default:
 109                         usage();
 110                 }
 111
 112         /* default user + system time and starting time */
 113         if (!flags) {
 114             flags = AC_CTIME | AC_BTIME;
 115         }
 116
 117         argc -= optind;
 118         argv += optind;
 119
 120         if (argc > 0 && **argv == '+') {
 121                 format = *argv + 1; /* skip + */
 122                 argc--;
 123                 argv++;
 124         }
 125
 126         if (strcmp(acctfile, "-") == 0) {
 127                 fp = stdin;
 128                 readrec = readrec_forward;
 129         } else {
 130                 /* Open the file. */
 131                 if ((fp = fopen(acctfile, "r")) == NULL)
 132                         err(1, "could not open %s", acctfile);
 133                 if (fseek(fp, 0l, SEEK_END) == -1)
 134                         err(1, "seek to end of %s failed", acctfile);
 135                 readrec = readrec_backward;
 136         }
 137
 138         while ((rv = readrec(fp, &ab)) == 1) {
 139                 for (p = &ab.ac_comm[0];
 140                     p < &ab.ac_comm[AC_COMM_LEN] && *p; ++p)
 141                         if (!isprint(*p))
 142                                 *p = '?';
 143
 144                 if (*argv && !requested(argv, &ab))
 145                         continue;
 146
 147                 (void)printf("%-*.*s %-7s %-*s %-8s",
 148                              AC_COMM_LEN, AC_COMM_LEN, ab.ac_comm,
 149                              flagbits(ab.ac_flagx),
 150                              MAXLOGNAME - 1, user_from_uid(ab.ac_uid, 0),
 151                              getdev(ab.ac_tty));
 152
 153
 154                 /* user + system time */
 155                 if (flags & AC_CTIME) {
 156                         (void)printf(" %6.3f secs",
 157                             (ab.ac_utime + ab.ac_stime) / 1000000);
 158                 }
 159
 160                 /* usr time */
 161                 if (flags & AC_UTIME) {
 162                         (void)printf(" %6.3f us", ab.ac_utime / 1000000);
 163                 }
 164
 165                 /* system time */
 166                 if (flags & AC_STIME) {
 167                         (void)printf(" %6.3f sy", ab.ac_stime / 1000000);
 168                 }
 169
 170                 /* elapsed time */
 171                 if (flags & AC_ETIME) {
 172                         (void)printf(" %8.3f es", ab.ac_etime / 1000000);
 173                 }
 174
 175                 /* starting time */
 176                 if (flags & AC_BTIME) {
 177                         if (format != NULL) {
 178                                 (void)strftime(buf, sizeof(buf), format,
 179                                     localtime(&ab.ac_btime));
 180                                 (void)printf(" %s", buf);
 181                         } else
 182                                 (void)printf(" %.19s", ctime(&ab.ac_btime));
 183                 }
 184
 185                 /* exit time (starting time + elapsed time )*/
 186                 if (flags & AC_FTIME) {
 187                         t = ab.ac_btime;
 188                         t += (time_t)(ab.ac_etime / 1000000);
 189                         if (format != NULL) {
 190                                 (void)strftime(buf, sizeof(buf), format,
 191                                     localtime(&t));
 192                                 (void)printf(" %s", buf);
 193                         } else
 194                                 (void)printf(" %.19s", ctime(&t));
 195                 }
 196                 printf("\n");
 197         }
 198         if (rv == EOF)
 199                 err(1, "read record from %s failed", acctfile);
 200
 201         if (fflush(stdout))
 202                 err(1, "stdout");
 203         exit(0);
 204 }
 205
 206 char *
 207 flagbits(int f)
 208 {
 209         static char flags[20] = "-";
 210         char *p;
 211
 212 #define BIT(flag, ch)   if (f & flag) *p++ = ch
 213
 214         p = flags + 1;
 215         BIT(ASU, 'S');
 216         BIT(AFORK, 'F');
 217         BIT(ACOMPAT, 'C');
 218         BIT(ACORE, 'D');
 219         BIT(AXSIG, 'X');
 220         *p = '\0';
 221         return (flags);
 222 }
 223
 224 int
 225 requested(char *argv[], struct acctv3 *acp)
 226 {
 227         const char *p;
 228
 229         do {
 230                 p = user_from_uid(acp->ac_uid, 0);
 231                 if (!strcmp(p, *argv))
 232                         return (1);
 233                 if ((p = getdev(acp->ac_tty)) && !strcmp(p, *argv))
 234                         return (1);
 235                 if (!strncmp(acp->ac_comm, *argv, AC_COMM_LEN))
 236                         return (1);
 237         } while (*++argv);
 238         return (0);
 239 }
 240
 241 const char *
 242 getdev(dev_t dev)
 243 {
 244         static dev_t lastdev = (dev_t)-1;
 245         static const char *lastname;
 246
 247         if (dev == NODEV)                       /* Special case. */
 248                 return ("__");
 249         if (dev == lastdev)                     /* One-element cache. */
 250                 return (lastname);
 251         lastdev = dev;
 252         lastname = devname(dev, S_IFCHR);
 253         return (lastname);
 254 }
 255
 256 static void
 257 usage(void)
 258 {
 259         (void)fprintf(stderr,
 260             "usage: lastcomm [-EScesu] [-f file] [+format] [command ...] "
 261             "[user ...] [terminal ...]\n");
 262         exit(1);
 263 }