freebsd-dev/usr.bin/lastcomm/lastcomm.c
Konstantin Belousov 6fe3ecc3b1 Allow to specify strftime(3) format for process start end exit times.
Submitted by:	Andrey Zonov <andrey zonov org>
MFC after:	1 week
2012-05-17 11:10:13 +00:00

276 lines
6.6 KiB
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.
* 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("$FreeBSD$");
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/acct.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "pathnames.h"
/*XXX*/#include <inttypes.h>
time_t expand(u_int);
char *flagbits(int);
const char *getdev(dev_t);
int readrec_forward(FILE *f, struct acctv2 *av2);
int readrec_backward(FILE *f, struct acctv2 *av2);
int requested(char *[], struct acctv2 *);
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 )*/
int
main(int argc, char *argv[])
{
struct acctv2 ab;
char *p;
FILE *fp;
int (*readrec)(FILE *f, struct acctv2 *av2);
time_t t;
int ch, rv;
const char *acctfile, *format;
char buf[1024];
int flags = 0;
acctfile = _PATH_ACCT;
format = NULL;
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;
if (argc > 0 && **argv == '+') {
format = *argv + 1; /* skip + */
argc--;
argv++;
}
if (strcmp(acctfile, "-") == 0) {
fp = stdin;
readrec = readrec_forward;
} else {
/* Open the file. */
if ((fp = fopen(acctfile, "r")) == NULL)
err(1, "could not open %s", acctfile);
if (fseek(fp, 0l, SEEK_END) == -1)
err(1, "seek to end of %s failed", acctfile);
readrec = readrec_backward;
}
while ((rv = readrec(fp, &ab)) == 1) {
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 %-8s",
AC_COMM_LEN, AC_COMM_LEN, ab.ac_comm,
flagbits(ab.ac_flagx),
MAXLOGNAME - 1, user_from_uid(ab.ac_uid, 0),
getdev(ab.ac_tty));
/* user + system time */
if (flags & AC_CTIME) {
(void)printf(" %6.3f secs",
(ab.ac_utime + ab.ac_stime) / 1000000);
}
/* usr time */
if (flags & AC_UTIME) {
(void)printf(" %6.3f us", ab.ac_utime / 1000000);
}
/* system time */
if (flags & AC_STIME) {
(void)printf(" %6.3f sy", ab.ac_stime / 1000000);
}
/* elapsed time */
if (flags & AC_ETIME) {
(void)printf(" %8.3f es", ab.ac_etime / 1000000);
}
/* starting time */
if (flags & AC_BTIME) {
if (format != NULL) {
(void)strftime(buf, sizeof(buf), format,
localtime(&ab.ac_btime));
(void)printf(" %s", buf);
} else
(void)printf(" %.16s", ctime(&ab.ac_btime));
}
/* exit time (starting time + elapsed time )*/
if (flags & AC_FTIME) {
t = ab.ac_btime;
t += (time_t)(ab.ac_etime / 1000000);
if (format != NULL) {
(void)strftime(buf, sizeof(buf), format,
localtime(&t));
(void)printf(" %s", buf);
} else
(void)printf(" %.16s", ctime(&t));
}
printf("\n");
}
if (rv == EOF)
err(1, "read record from %s failed", acctfile);
if (fflush(stdout))
err(1, "stdout");
exit(0);
}
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 acctv2 *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] [+format] [command ...] "
"[user ...] [terminal ...]\n");
exit(1);
}