300 lines
7.0 KiB
C
300 lines
7.0 KiB
C
/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)lastcomm.c 8.1 (Berkeley) 6/6/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/acct.h>
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#include <ctype.h>
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#include <err.h>
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#include <fcntl.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <utmp.h>
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#include "pathnames.h"
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time_t expand(u_int);
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char *flagbits(int);
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const char *getdev(dev_t);
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int requested(char *[], struct acct *);
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static void usage(void);
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#define AC_UTIME 1 /* user */
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#define AC_STIME 2 /* system */
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#define AC_ETIME 4 /* elapsed */
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#define AC_CTIME 8 /* user + system time, default */
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#define AC_BTIME 16 /* starting time */
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#define AC_FTIME 32 /* exit time (starting time + elapsed time )*/
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#define AC_HZ ((double)AHZ)
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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char *p;
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struct acct ab;
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struct stat sb;
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FILE *fp;
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off_t size;
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time_t t;
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int ch;
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const char *acctfile;
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int flags = 0;
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acctfile = _PATH_ACCT;
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while ((ch = getopt(argc, argv, "f:usecSE")) != -1)
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switch((char)ch) {
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case 'f':
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acctfile = optarg;
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break;
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case 'u':
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flags |= AC_UTIME; /* user time */
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break;
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case 's':
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flags |= AC_STIME; /* system time */
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break;
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case 'e':
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flags |= AC_ETIME; /* elapsed time */
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break;
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case 'c':
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flags |= AC_CTIME; /* user + system time */
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break;
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case 'S':
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flags |= AC_BTIME; /* starting time */
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break;
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case 'E':
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/* exit time (starting time + elapsed time )*/
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flags |= AC_FTIME;
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break;
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case '?':
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default:
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usage();
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}
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/* default user + system time and starting time */
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if (!flags) {
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flags = AC_CTIME | AC_BTIME;
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}
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argc -= optind;
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argv += optind;
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/* Open the file. */
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if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb))
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err(1, "%s", acctfile);
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/*
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* Round off to integral number of accounting records, probably
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* not necessary, but it doesn't hurt.
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*/
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size = sb.st_size - sb.st_size % sizeof(struct acct);
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/* Check if any records to display. */
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if ((unsigned)size < sizeof(struct acct))
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exit(0);
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/*
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* Seek to before the last entry in the file; use lseek(2) in case
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* the file is bigger than a "long".
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*/
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size -= sizeof(struct acct);
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if (lseek(fileno(fp), size, SEEK_SET) == -1)
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err(1, "%s", acctfile);
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for (;;) {
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if (fread(&ab, sizeof(struct acct), 1, fp) != 1)
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err(1, "%s", acctfile);
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if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1)
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err(1, "%s", acctfile);
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if (size == 0)
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break;
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size -= sizeof(struct acct);
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if (ab.ac_comm[0] == '\0') {
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ab.ac_comm[0] = '?';
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ab.ac_comm[1] = '\0';
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} else
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for (p = &ab.ac_comm[0];
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p < &ab.ac_comm[AC_COMM_LEN] && *p; ++p)
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if (!isprint(*p))
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*p = '?';
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if (*argv && !requested(argv, &ab))
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continue;
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(void)printf("%-*.*s %-7s %-*s %-*s",
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AC_COMM_LEN, AC_COMM_LEN, ab.ac_comm,
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flagbits(ab.ac_flag),
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UT_NAMESIZE, user_from_uid(ab.ac_uid, 0),
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UT_LINESIZE, getdev(ab.ac_tty));
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/* user + system time */
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if (flags & AC_CTIME) {
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(void)printf(" %6.2f secs",
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(expand(ab.ac_utime) +
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expand(ab.ac_stime))/AC_HZ);
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}
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/* usr time */
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if (flags & AC_UTIME) {
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(void)printf(" %6.2f us", expand(ab.ac_utime)/AC_HZ);
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}
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/* system time */
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if (flags & AC_STIME) {
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(void)printf(" %6.2f sy", expand(ab.ac_stime)/AC_HZ);
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}
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/* elapsed time */
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if (flags & AC_ETIME) {
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(void)printf(" %8.2f es", expand(ab.ac_etime)/AC_HZ);
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}
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/* starting time */
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if (flags & AC_BTIME) {
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(void)printf(" %.16s", ctime(&ab.ac_btime));
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}
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/* exit time (starting time + elapsed time )*/
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if (flags & AC_FTIME) {
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t = ab.ac_btime;
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t += (time_t)(expand(ab.ac_etime)/AC_HZ);
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(void)printf(" %.16s", ctime(&t));
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}
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printf("\n");
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}
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exit(0);
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}
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time_t
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expand(t)
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u_int t;
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{
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time_t nt;
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nt = t & 017777;
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t >>= 13;
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while (t) {
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t--;
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nt <<= 3;
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}
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return (nt);
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}
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char *
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flagbits(f)
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int f;
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{
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static char flags[20] = "-";
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char *p;
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#define BIT(flag, ch) if (f & flag) *p++ = ch
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p = flags + 1;
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BIT(ASU, 'S');
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BIT(AFORK, 'F');
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BIT(ACOMPAT, 'C');
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BIT(ACORE, 'D');
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BIT(AXSIG, 'X');
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*p = '\0';
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return (flags);
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}
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int
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requested(argv, acp)
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char *argv[];
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struct acct *acp;
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{
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const char *p;
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do {
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p = user_from_uid(acp->ac_uid, 0);
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if (!strcmp(p, *argv))
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return (1);
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if ((p = getdev(acp->ac_tty)) && !strcmp(p, *argv))
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return (1);
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if (!strncmp(acp->ac_comm, *argv, AC_COMM_LEN))
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return (1);
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} while (*++argv);
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return (0);
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}
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const char *
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getdev(dev)
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dev_t dev;
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{
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static dev_t lastdev = (dev_t)-1;
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static const char *lastname;
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if (dev == NODEV) /* Special case. */
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return ("__");
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if (dev == lastdev) /* One-element cache. */
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return (lastname);
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lastdev = dev;
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lastname = devname(dev, S_IFCHR);
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return (lastname);
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}
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static void
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usage()
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{
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(void)fprintf(stderr,
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"usage: lastcomm [-EScesu] [ -f file ] [command ...] [user ...] [tty ...]\n");
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exit(1);
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}
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