/* * 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. * * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. * @(#)lastcomm.c 8.1 (Berkeley) 6/6/93 * $FreeBSD: src/usr.bin/lastcomm/lastcomm.c,v 1.10.2.3 2001/10/01 12:51:15 dd Exp $ * $DragonFly: src/usr.bin/lastcomm/lastcomm.c,v 1.3 2003/10/04 20:36:47 hmp Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include "pathnames.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, "%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); /* * 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[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"); } 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); }