FreeBSD-5.3/usr.bin/lastcomm/lastcomm.c
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1980, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)lastcomm.c 8.1 (Berkeley) 6/6/93";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/lastcomm/lastcomm.c,v 1.19 2004/05/20 19:25:27 hmp Exp $");
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/acct.h>
#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <utmp.h>
#include "pathnames.h"
/*XXX*/#include <inttypes.h>
time_t expand(u_int);
char *flagbits(int);
const char *getdev(dev_t);
int requested(char *[], struct acct *);
static void usage(void);
#define AC_UTIME 1 /* user */
#define AC_STIME 2 /* system */
#define AC_ETIME 4 /* elapsed */
#define AC_CTIME 8 /* user + system time, default */
#define AC_BTIME 16 /* starting time */
#define AC_FTIME 32 /* exit time (starting time + elapsed time )*/
#define AC_HZ ((double)AHZ)
int
main(int argc, char *argv[])
{
char *p;
struct acct ab;
struct stat sb;
FILE *fp;
off_t size;
time_t t;
int ch;
const char *acctfile;
int flags = 0;
acctfile = _PATH_ACCT;
while ((ch = getopt(argc, argv, "f:usecSE")) != -1)
switch((char)ch) {
case 'f':
acctfile = optarg;
break;
case 'u':
flags |= AC_UTIME; /* user time */
break;
case 's':
flags |= AC_STIME; /* system time */
break;
case 'e':
flags |= AC_ETIME; /* elapsed time */
break;
case 'c':
flags |= AC_CTIME; /* user + system time */
break;
case 'S':
flags |= AC_BTIME; /* starting time */
break;
case 'E':
/* exit time (starting time + elapsed time )*/
flags |= AC_FTIME;
break;
case '?':
default:
usage();
}
/* default user + system time and starting time */
if (!flags) {
flags = AC_CTIME | AC_BTIME;
}
argc -= optind;
argv += optind;
/* Open the file. */
if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb))
err(1, "could not open %s", acctfile);
/*
* Round off to integral number of accounting records, probably
* not necessary, but it doesn't hurt.
*/
size = sb.st_size - sb.st_size % sizeof(struct acct);
/* Check if any records to display. */
if ((unsigned)size < sizeof(struct acct))
exit(0);
do {
int rv;
size -= sizeof(struct acct);
if (fseeko(fp, size, SEEK_SET) == -1)
err(1, "seek %s failed", acctfile);
if ((rv = fread(&ab, sizeof(struct acct), 1, fp)) != 1)
err(1, "read %s returned %d", acctfile, rv);
if (ab.ac_comm[0] == '\0') {
ab.ac_comm[0] = '?';
ab.ac_comm[1] = '\0';
} else
for (p = &ab.ac_comm[0];
p < &ab.ac_comm[AC_COMM_LEN] && *p; ++p)
if (!isprint(*p))
*p = '?';
if (*argv && !requested(argv, &ab))
continue;
(void)printf("%-*.*s %-7s %-*s %-*s",
AC_COMM_LEN, AC_COMM_LEN, ab.ac_comm,
flagbits(ab.ac_flag),
UT_NAMESIZE, user_from_uid(ab.ac_uid, 0),
UT_LINESIZE, getdev(ab.ac_tty));
/* user + system time */
if (flags & AC_CTIME) {
(void)printf(" %6.2f secs",
(expand(ab.ac_utime) +
expand(ab.ac_stime))/AC_HZ);
}
/* usr time */
if (flags & AC_UTIME) {
(void)printf(" %6.2f us", expand(ab.ac_utime)/AC_HZ);
}
/* system time */
if (flags & AC_STIME) {
(void)printf(" %6.2f sy", expand(ab.ac_stime)/AC_HZ);
}
/* elapsed time */
if (flags & AC_ETIME) {
(void)printf(" %8.2f es", expand(ab.ac_etime)/AC_HZ);
}
/* starting time */
if (flags & AC_BTIME) {
(void)printf(" %.16s", ctime(&ab.ac_btime));
}
/* exit time (starting time + elapsed time )*/
if (flags & AC_FTIME) {
t = ab.ac_btime;
t += (time_t)(expand(ab.ac_etime)/AC_HZ);
(void)printf(" %.16s", ctime(&t));
}
printf("\n");
} while (size > 0);
exit(0);
}
time_t
expand(u_int t)
{
time_t nt;
nt = t & 017777;
t >>= 13;
while (t) {
t--;
nt <<= 3;
}
return (nt);
}
char *
flagbits(int f)
{
static char flags[20] = "-";
char *p;
#define BIT(flag, ch) if (f & flag) *p++ = ch
p = flags + 1;
BIT(ASU, 'S');
BIT(AFORK, 'F');
BIT(ACOMPAT, 'C');
BIT(ACORE, 'D');
BIT(AXSIG, 'X');
*p = '\0';
return (flags);
}
int
requested(char *argv[], struct acct *acp)
{
const char *p;
do {
p = user_from_uid(acp->ac_uid, 0);
if (!strcmp(p, *argv))
return (1);
if ((p = getdev(acp->ac_tty)) && !strcmp(p, *argv))
return (1);
if (!strncmp(acp->ac_comm, *argv, AC_COMM_LEN))
return (1);
} while (*++argv);
return (0);
}
const char *
getdev(dev_t dev)
{
static dev_t lastdev = (dev_t)-1;
static const char *lastname;
if (dev == NODEV) /* Special case. */
return ("__");
if (dev == lastdev) /* One-element cache. */
return (lastname);
lastdev = dev;
lastname = devname(dev, S_IFCHR);
return (lastname);
}
static void
usage(void)
{
(void)fprintf(stderr,
"usage: lastcomm [-EScesu] [ -f file ] [command ...] [user ...] [tty ...]\n");
exit(1);
}