usr.bin/lastcomm/lastcomm.c

   1 /*
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  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  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef lint
  31 static const char copyright[] =
  32 "@(#) Copyright (c) 1980, 1993\n\
  33         The Regents of the University of California.  All rights reserved.\n";
  34 #endif /* not lint */
  35
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)lastcomm.c  8.1 (Berkeley) 6/6/93";
  39 #endif
  40 #endif /* not lint */
  41 #include <sys/cdefs.h>
  42 __FBSDID("$FreeBSD$");
  43
  44 #include <sys/param.h>
  45 #include <sys/stat.h>
  46 #include <sys/acct.h>
  47
  48 #include <ctype.h>
  49 #include <err.h>
  50 #include <errno.h>
  51 #include <pwd.h>
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55 #include <time.h>
  56 #include <unistd.h>
  57 #include "pathnames.h"
  58
  59 /*XXX*/#include <inttypes.h>
  60
  61 time_t   expand(u_int);
  62 char    *flagbits(int);
  63 const    char *getdev(dev_t);
  64 int      readrec_forward(FILE *f, struct acctv2 *av2);
  65 int      readrec_backward(FILE *f, struct acctv2 *av2);
  66 int      requested(char *[], struct acctv2 *);
  67 static   void usage(void);
  68
  69 #define AC_UTIME 1 /* user */
  70 #define AC_STIME 2 /* system */
  71 #define AC_ETIME 4 /* elapsed */
  72 #define AC_CTIME 8 /* user + system time, default */
  73
  74 #define AC_BTIME 16 /* starting time */
  75 #define AC_FTIME 32 /* exit time (starting time + elapsed time )*/
  76
  77 int
  78 main(int argc, char *argv[])
  79 {
  80         struct acctv2 ab;
  81         char *p;
  82         FILE *fp;
  83         int (*readrec)(FILE *f, struct acctv2 *av2);
  84         time_t t;
  85         int ch, rv;
  86         const char *acctfile, *format;
  87         char buf[1024];
  88         int flags = 0;
  89
  90         acctfile = _PATH_ACCT;
  91         format = NULL;
  92         while ((ch = getopt(argc, argv, "f:usecSE")) != -1)
  93                 switch((char)ch) {
  94                 case 'f':
  95                         acctfile = optarg;
  96                         break;
  97
  98                 case 'u':
  99                         flags |= AC_UTIME; /* user time */
 100                         break;
 101                 case 's':
 102                         flags |= AC_STIME; /* system time */
 103                         break;
 104                 case 'e':
 105                         flags |= AC_ETIME; /* elapsed time */
 106                         break;
 107                 case 'c':
 108                         flags |= AC_CTIME; /* user + system time */
 109                         break;
 110
 111                 case 'S':
 112                         flags |= AC_BTIME; /* starting time */
 113                         break;
 114                 case 'E':
 115                         /* exit time (starting time + elapsed time )*/
 116                         flags |= AC_FTIME;
 117                         break;
 118
 119                 case '?':
 120                 default:
 121                         usage();
 122                 }
 123
 124         /* default user + system time and starting time */
 125         if (!flags) {
 126             flags = AC_CTIME | AC_BTIME;
 127         }
 128
 129         argc -= optind;
 130         argv += optind;
 131
 132         if (argc > 0 && **argv == '+') {
 133                 format = *argv + 1; /* skip + */
 134                 argc--;
 135                 argv++;
 136         }
 137
 138         if (strcmp(acctfile, "-") == 0) {
 139                 fp = stdin;
 140                 readrec = readrec_forward;
 141         } else {
 142                 /* Open the file. */
 143                 if ((fp = fopen(acctfile, "r")) == NULL)
 144                         err(1, "could not open %s", acctfile);
 145                 if (fseek(fp, 0l, SEEK_END) == -1)
 146                         err(1, "seek to end of %s failed", acctfile);
 147                 readrec = readrec_backward;
 148         }
 149
 150         while ((rv = readrec(fp, &ab)) == 1) {
 151                 for (p = &ab.ac_comm[0];
 152                     p < &ab.ac_comm[AC_COMM_LEN] && *p; ++p)
 153                         if (!isprint(*p))
 154                                 *p = '?';
 155
 156                 if (*argv && !requested(argv, &ab))
 157                         continue;
 158
 159                 (void)printf("%-*.*s %-7s %-*s %-8s",
 160                              AC_COMM_LEN, AC_COMM_LEN, ab.ac_comm,
 161                              flagbits(ab.ac_flagx),
 162                              MAXLOGNAME - 1, user_from_uid(ab.ac_uid, 0),
 163                              getdev(ab.ac_tty));
 164
 165
 166                 /* user + system time */
 167                 if (flags & AC_CTIME) {
 168                         (void)printf(" %6.3f secs",
 169                             (ab.ac_utime + ab.ac_stime) / 1000000);
 170                 }
 171
 172                 /* usr time */
 173                 if (flags & AC_UTIME) {
 174                         (void)printf(" %6.3f us", ab.ac_utime / 1000000);
 175                 }
 176
 177                 /* system time */
 178                 if (flags & AC_STIME) {
 179                         (void)printf(" %6.3f sy", ab.ac_stime / 1000000);
 180                 }
 181
 182                 /* elapsed time */
 183                 if (flags & AC_ETIME) {
 184                         (void)printf(" %8.3f es", ab.ac_etime / 1000000);
 185                 }
 186
 187                 /* starting time */
 188                 if (flags & AC_BTIME) {
 189                         if (format != NULL) {
 190                                 (void)strftime(buf, sizeof(buf), format,
 191                                     localtime(&ab.ac_btime));
 192                                 (void)printf(" %s", buf);
 193                         } else
 194                                 (void)printf(" %.16s", ctime(&ab.ac_btime));
 195                 }
 196
 197                 /* exit time (starting time + elapsed time )*/
 198                 if (flags & AC_FTIME) {
 199                         t = ab.ac_btime;
 200                         t += (time_t)(ab.ac_etime / 1000000);
 201                         if (format != NULL) {
 202                                 (void)strftime(buf, sizeof(buf), format,
 203                                     localtime(&t));
 204                                 (void)printf(" %s", buf);
 205                         } else
 206                                 (void)printf(" %.16s", ctime(&t));
 207                 }
 208                 printf("\n");
 209         }
 210         if (rv == EOF)
 211                 err(1, "read record from %s failed", acctfile);
 212
 213         if (fflush(stdout))
 214                 err(1, "stdout");
 215         exit(0);
 216 }
 217
 218 char *
 219 flagbits(int f)
 220 {
 221         static char flags[20] = "-";
 222         char *p;
 223
 224 #define BIT(flag, ch)   if (f & flag) *p++ = ch
 225
 226         p = flags + 1;
 227         BIT(ASU, 'S');
 228         BIT(AFORK, 'F');
 229         BIT(ACOMPAT, 'C');
 230         BIT(ACORE, 'D');
 231         BIT(AXSIG, 'X');
 232         *p = '\0';
 233         return (flags);
 234 }
 235
 236 int
 237 requested(char *argv[], struct acctv2 *acp)
 238 {
 239         const char *p;
 240
 241         do {
 242                 p = user_from_uid(acp->ac_uid, 0);
 243                 if (!strcmp(p, *argv))
 244                         return (1);
 245                 if ((p = getdev(acp->ac_tty)) && !strcmp(p, *argv))
 246                         return (1);
 247                 if (!strncmp(acp->ac_comm, *argv, AC_COMM_LEN))
 248                         return (1);
 249         } while (*++argv);
 250         return (0);
 251 }
 252
 253 const char *
 254 getdev(dev_t dev)
 255 {
 256         static dev_t lastdev = (dev_t)-1;
 257         static const char *lastname;
 258
 259         if (dev == NODEV)                       /* Special case. */
 260                 return ("__");
 261         if (dev == lastdev)                     /* One-element cache. */
 262                 return (lastname);
 263         lastdev = dev;
 264         lastname = devname(dev, S_IFCHR);
 265         return (lastname);
 266 }
 267
 268 static void
 269 usage(void)
 270 {
 271         (void)fprintf(stderr,
 272             "usage: lastcomm [-EScesu] [-f file] [+format] [command ...] "
 273             "[user ...] [terminal ...]\n");
 274         exit(1);
 275 }