272 lines
6.6 KiB
C
272 lines
6.6 KiB
C
/*
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* Copyright (c) 1980 Regents of the University of California.
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* 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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char copyright[] =
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"@(#) Copyright (c) 1980 Regents of the University of California.\n\
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All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)lastcomm.c 5.11 (Berkeley) 6/1/90";
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#endif /* not lint */
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/*
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* last command
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*/
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#include <sys/param.h>
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#include <sys/acct.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <utmp.h>
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#include <struct.h>
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#include <ctype.h>
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#include <stdio.h>
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#include "pathnames.h"
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struct acct buf[DEV_BSIZE / sizeof (struct acct)];
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time_t expand();
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char *flagbits();
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char *getdev();
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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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extern int optind;
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extern char *optarg;
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register struct acct *acp;
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register int bn, cc;
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struct stat sb;
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int ch, fd;
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char *acctfile, *ctime(), *strcpy(), *user_from_uid();
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long lseek();
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acctfile = _PATH_ACCT;
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while ((ch = getopt(argc, argv, "f:")) != EOF)
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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 '?':
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default:
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fputs("lastcomm [ -f file ]\n", stderr);
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exit(1);
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}
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argv += optind;
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fd = open(acctfile, O_RDONLY);
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if (fd < 0) {
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perror(acctfile);
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exit(1);
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}
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(void)fstat(fd, &sb);
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setpassent(1);
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for (bn = btodb(sb.st_size); bn >= 0; bn--) {
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(void)lseek(fd, (off_t)dbtob(bn), L_SET);
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cc = read(fd, buf, DEV_BSIZE);
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if (cc < 0) {
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perror("read");
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break;
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}
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acp = buf + (cc / sizeof (buf[0])) - 1;
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for (; acp >= buf; acp--) {
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register char *cp;
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time_t x;
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if (acp->ac_comm[0] == '\0')
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(void)strcpy(acp->ac_comm, "?");
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for (cp = &acp->ac_comm[0];
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cp < &acp->ac_comm[fldsiz(acct, ac_comm)] && *cp;
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cp++)
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if (!isascii(*cp) || iscntrl(*cp))
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*cp = '?';
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if (*argv && !ok(argv, acp))
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continue;
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x = expand(acp->ac_utime) + expand(acp->ac_stime);
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printf("%-*.*s %s %-*s %-*s %6.2f secs %.16s\n",
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fldsiz(acct, ac_comm), fldsiz(acct, ac_comm),
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acp->ac_comm, flagbits(acp->ac_flag),
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UT_NAMESIZE, user_from_uid(acp->ac_uid, 0),
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UT_LINESIZE, getdev(acp->ac_tty),
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x / (double)AHZ, ctime(&acp->ac_btime));
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}
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}
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}
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time_t
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expand (t)
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unsigned t;
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{
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register 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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register int f;
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{
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static char flags[20];
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char *p, *strcpy();
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#define BIT(flag, ch) if (f & flag) *p++ = ch;
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p = strcpy(flags, "- ");
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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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return (flags);
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}
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ok(argv, acp)
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register char *argv[];
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register struct acct *acp;
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{
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register char *cp;
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char *user_from_uid();
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do {
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cp = user_from_uid(acp->ac_uid, 0);
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if (!strcmp(cp, *argv))
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return(1);
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if ((cp = getdev(acp->ac_tty)) && !strcmp(cp, *argv))
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return(1);
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if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm)))
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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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#include <sys/dir.h>
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#define N_DEVS 43 /* hash value for device names */
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#define NDEVS 500 /* max number of file names in /dev */
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struct devhash {
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dev_t dev_dev;
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char dev_name [UT_LINESIZE + 1];
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struct devhash * dev_nxt;
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};
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struct devhash *dev_hash[N_DEVS];
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struct devhash *dev_chain;
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#define HASH(d) (((int) d) % N_DEVS)
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setupdevs()
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{
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register DIR * fd;
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register struct devhash * hashtab;
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register ndevs = NDEVS;
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struct direct * dp;
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char *malloc();
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/*NOSTRICT*/
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hashtab = (struct devhash *)malloc(NDEVS * sizeof(struct devhash));
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if (hashtab == (struct devhash *)0) {
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fputs("No mem for dev table\n", stderr);
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return;
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}
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if ((fd = opendir(_PATH_DEV)) == NULL) {
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perror(_PATH_DEV);
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return;
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}
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while (dp = readdir(fd)) {
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if (dp->d_ino == 0)
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continue;
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if (dp->d_name[0] != 't' && strcmp(dp->d_name, "console"))
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continue;
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(void)strncpy(hashtab->dev_name, dp->d_name, UT_LINESIZE);
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hashtab->dev_name[UT_LINESIZE] = 0;
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hashtab->dev_nxt = dev_chain;
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dev_chain = hashtab;
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hashtab++;
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if (--ndevs <= 0)
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break;
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}
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closedir(fd);
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}
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char *
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getdev(dev)
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dev_t dev;
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{
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register struct devhash *hp, *nhp;
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struct stat statb;
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char name[fldsiz(devhash, dev_name) + 6];
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static dev_t lastdev = (dev_t) -1;
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static char *lastname;
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static int init = 0;
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char *strcpy(), *strcat();
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if (dev == NODEV)
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return ("__");
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if (dev == lastdev)
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return (lastname);
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if (!init) {
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setupdevs();
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init++;
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}
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for (hp = dev_hash[HASH(dev)]; hp; hp = hp->dev_nxt)
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if (hp->dev_dev == dev) {
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lastdev = dev;
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return (lastname = hp->dev_name);
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}
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for (hp = dev_chain; hp; hp = nhp) {
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nhp = hp->dev_nxt;
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(void)strcpy(name, _PATH_DEV);
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strcat(name, hp->dev_name);
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if (stat(name, &statb) < 0) /* name truncated usually */
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continue;
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if ((statb.st_mode & S_IFMT) != S_IFCHR)
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continue;
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hp->dev_dev = statb.st_rdev;
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hp->dev_nxt = dev_hash[HASH(hp->dev_dev)];
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dev_hash[HASH(hp->dev_dev)] = hp;
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if (hp->dev_dev == dev) {
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dev_chain = nhp;
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lastdev = dev;
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return (lastname = hp->dev_name);
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}
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}
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dev_chain = (struct devhash *) 0;
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return ("??");
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}
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