NetBSD/usr.bin/lastcomm/lastcomm.c

290 lines
7.1 KiB
C

/*
* Copyright (c) 1980 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
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
/*static char sccsid[] = "from: @(#)lastcomm.c 5.11 (Berkeley) 6/1/90";*/
static char rcsid[] = "$Id: lastcomm.c,v 1.5 1994/03/23 04:37:40 cgd Exp $";
#endif /* not lint */
/*
* last command
*/
#include <sys/param.h>
#include <sys/acct.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <utmp.h>
#include <struct.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include "pathnames.h"
time_t expand();
char *flagbits();
char *getdev();
extern char *user_from_uid __P((unsigned long, int));
main(argc, argv)
int argc;
char *argv[];
{
register char *p;
struct acct ab;
struct stat sb;
FILE *fp;
off_t size;
time_t x;
int ch;
char *acctfile;
acctfile = _PATH_ACCT;
while ((ch = getopt(argc, argv, "f:")) != EOF)
switch((char)ch) {
case 'f':
acctfile = optarg;
break;
case '?':
default:
fputs("lastcomm [ -f file ]\n", stderr);
exit(1);
}
argv += optind;
/* Open the file. */
if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb))
err(1, "%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 (size < sizeof(struct acct))
exit(0);
/*
* Seek to before the last entry in the file; use lseek(2) in case
* the file is bigger than a "long".
*/
size -= sizeof(struct acct);
if (lseek(fileno(fp), size, SEEK_SET) == -1)
err(1, "%s", acctfile);
for (;;) {
if (fread(&ab, sizeof(struct acct), 1, fp) != 1)
err(1, "%s", acctfile);
if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1)
err(1, "%s", acctfile);
if (size == 0)
break;
size -= sizeof(struct acct);
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[fldsiz(acct, ac_comm)] && *p; ++p)
if (!isprint(*p))
*p = '?';
if (*argv && !ok(argv, &ab))
continue;
x = expand(ab.ac_utime) + expand(ab.ac_stime);
printf("%-*.*s %s %-*s %-*s %6.2f secs %.16s\n",
fldsiz(acct, ac_comm), fldsiz(acct, ac_comm),
ab.ac_comm, flagbits(ab.ac_flag),
UT_NAMESIZE, user_from_uid(ab.ac_uid, 0),
UT_LINESIZE, getdev(ab.ac_tty),
x / (double)AHZ, ctime(&ab.ac_btime));
}
exit(0);
}
time_t
expand (t)
unsigned t;
{
register time_t nt;
nt = t & 017777;
t >>= 13;
while (t) {
t--;
nt <<= 3;
}
return (nt);
}
char *
flagbits(f)
register int f;
{
static char flags[20];
char *p, *strcpy();
#define BIT(flag, ch) if (f & flag) *p++ = ch;
p = strcpy(flags, "- ");
BIT(ASU, 'S');
BIT(AFORK, 'F');
BIT(ACOMPAT, 'C');
BIT(ACORE, 'D');
BIT(AXSIG, 'X');
return (flags);
}
ok(argv, acp)
register char *argv[];
register struct acct *acp;
{
register char *cp;
do {
cp = user_from_uid(acp->ac_uid, 0);
if (!strcmp(cp, *argv))
return(1);
if ((cp = getdev(acp->ac_tty)) && !strcmp(cp, *argv))
return(1);
if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm)))
return(1);
} while (*++argv);
return(0);
}
#include <dirent.h>
#define N_DEVS 43 /* hash value for device names */
#define NDEVS 500 /* max number of file names in /dev */
struct devhash {
dev_t dev_dev;
char dev_name [UT_LINESIZE + 1];
struct devhash * dev_nxt;
};
struct devhash *dev_hash[N_DEVS];
struct devhash *dev_chain;
#define HASH(d) (((int) d) % N_DEVS)
setupdevs()
{
register DIR * fd;
register struct devhash * hashtab;
register ndevs = NDEVS;
struct dirent * dp;
/*NOSTRICT*/
hashtab = (struct devhash *)malloc(NDEVS * sizeof(struct devhash));
if (hashtab == (struct devhash *)0) {
fputs("No mem for dev table\n", stderr);
return;
}
if ((fd = opendir(_PATH_DEV)) == NULL) {
perror(_PATH_DEV);
return;
}
while (dp = readdir(fd)) {
if (dp->d_ino == 0)
continue;
if (dp->d_name[0] != 't' &&
#warning WARNING! ugly pc 'vga' console hack!
(strcmp(dp->d_name, "console") && strcmp(dp->d_name, "vga")))
continue;
(void)strncpy(hashtab->dev_name, dp->d_name, UT_LINESIZE);
hashtab->dev_name[UT_LINESIZE] = 0;
hashtab->dev_nxt = dev_chain;
dev_chain = hashtab;
hashtab++;
if (--ndevs <= 0)
break;
}
closedir(fd);
}
char *
getdev(dev)
dev_t dev;
{
register struct devhash *hp, *nhp;
struct stat statb;
char name[fldsiz(devhash, dev_name) + 6];
static dev_t lastdev = (dev_t) -1;
static char *lastname;
static int init = 0;
char *strcpy(), *strcat();
if (dev == NODEV)
return ("__");
if (dev == lastdev)
return (lastname);
if (!init) {
setupdevs();
init++;
}
for (hp = dev_hash[HASH(dev)]; hp; hp = hp->dev_nxt)
if (hp->dev_dev == dev) {
lastdev = dev;
return (lastname = hp->dev_name);
}
for (hp = dev_chain; hp; hp = nhp) {
nhp = hp->dev_nxt;
(void)strcpy(name, _PATH_DEV);
strcat(name, hp->dev_name);
if (stat(name, &statb) < 0) /* name truncated usually */
continue;
if ((statb.st_mode & S_IFMT) != S_IFCHR)
continue;
hp->dev_dev = statb.st_rdev;
hp->dev_nxt = dev_hash[HASH(hp->dev_dev)];
dev_hash[HASH(hp->dev_dev)] = hp;
if (hp->dev_dev == dev) {
dev_chain = nhp;
lastdev = dev;
return (lastname = hp->dev_name);
}
}
dev_chain = (struct devhash *) 0;
return ("??");
}