/* $OpenBSD: lastcomm.c,v 1.14 2004/09/14 22:54:54 deraadt Exp $ */ /* $NetBSD: lastcomm.c,v 1.9 1995/10/22 01:43:42 ghudson Exp $ */ /* * 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. 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 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 8.2 (Berkeley) 4/29/95"; #endif static char rcsid[] = "$OpenBSD: lastcomm.c,v 1.14 2004/09/14 22:54:54 deraadt Exp $"; #endif /* not lint */ #include <sys/param.h> #include <sys/stat.h> #include <sys/acct.h> #include <ctype.h> #include <err.h> #include <fcntl.h> #include <math.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <struct.h> #include <tzfile.h> #include <unistd.h> #include <utmp.h> #include <pwd.h> #include "pathnames.h" time_t expand(u_int); char *flagbits(int); char *getdev(dev_t); int requested(char *[], struct acct *); void usage(void); int main(int argc, char *argv[]) { char *p; struct acct ab; struct stat sb; FILE *fp; off_t size; time_t t; double delta; int ch; char *acctfile; acctfile = _PATH_ACCT; while ((ch = getopt(argc, argv, "f:")) != -1) switch((char)ch) { case 'f': acctfile = optarg; break; case '?': default: usage(); } argc -= optind; 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 (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 || requested(argv, &ab)) { t = expand(ab.ac_utime) + expand(ab.ac_stime); (void)printf("%-*.*s %-7s %-*.*s %-*.*s %6.2f secs %.16s", (int)fldsiz(acct, ac_comm), (int)fldsiz(acct, ac_comm), ab.ac_comm, flagbits(ab.ac_flag), UT_NAMESIZE, UT_NAMESIZE, user_from_uid(ab.ac_uid, 0), UT_LINESIZE, UT_LINESIZE, getdev(ab.ac_tty), t / (double)AHZ, ctime(&ab.ac_btime)); delta = expand(ab.ac_etime) / (double)AHZ; printf(" (%1.0f:%02.0f:%05.2f)\n", delta / SECSPERHOUR, fmod(delta, (double)SECSPERHOUR) / SECSPERMIN, fmod(delta, (double)SECSPERMIN)); } if (size == 0) break; /* seek to previous entry */ if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1) err(1, "%s", acctfile); size -= sizeof(struct acct); } 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) { do { if (!strcmp(user_from_uid(acp->ac_uid, 0), *argv)) return (1); if (!strcmp(getdev(acp->ac_tty), *argv)) return (1); if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm))) return (1); } while (*++argv); return (0); } char * getdev(dev_t dev) { static dev_t lastdev = (dev_t)-1; static char *lastname; if (dev == NODEV) /* Special case. */ return ("__"); if (dev == lastdev) /* One-element cache. */ return (lastname); lastdev = dev; if ((lastname = devname(dev, S_IFCHR)) == NULL) lastname = "??"; return (lastname); } void usage(void) { (void)fprintf(stderr, "lastcomm [ -f file ] [command ...] [user ...] [tty ...]\n"); exit(1); }