| 1 | /* |
| 2 | * Copyright (c) 1980, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. |
| 34 | * @(#)lastcomm.c 8.1 (Berkeley) 6/6/93 |
| 35 | * $FreeBSD: src/usr.bin/lastcomm/lastcomm.c,v 1.10.2.3 2001/10/01 12:51:15 dd Exp $ |
| 36 | * $DragonFly: src/usr.bin/lastcomm/lastcomm.c,v 1.3 2003/10/04 20:36:47 hmp Exp $ |
| 37 | */ |
| 38 | |
| 39 | #include <sys/param.h> |
| 40 | #include <sys/stat.h> |
| 41 | #include <sys/acct.h> |
| 42 | |
| 43 | #include <ctype.h> |
| 44 | #include <err.h> |
| 45 | #include <fcntl.h> |
| 46 | #include <pwd.h> |
| 47 | #include <stdio.h> |
| 48 | #include <stdlib.h> |
| 49 | #include <string.h> |
| 50 | #include <unistd.h> |
| 51 | #include <utmp.h> |
| 52 | #include "pathnames.h" |
| 53 | |
| 54 | time_t expand(u_int); |
| 55 | char *flagbits(int); |
| 56 | const char *getdev(dev_t); |
| 57 | int requested(char *[], struct acct *); |
| 58 | static void usage(void); |
| 59 | |
| 60 | #define AC_UTIME 1 /* user */ |
| 61 | #define AC_STIME 2 /* system */ |
| 62 | #define AC_ETIME 4 /* elapsed */ |
| 63 | #define AC_CTIME 8 /* user + system time, default */ |
| 64 | |
| 65 | #define AC_BTIME 16 /* starting time */ |
| 66 | #define AC_FTIME 32 /* exit time (starting time + elapsed time )*/ |
| 67 | |
| 68 | #define AC_HZ ((double)AHZ) |
| 69 | |
| 70 | int |
| 71 | main(int argc, char **argv) |
| 72 | { |
| 73 | char *p; |
| 74 | struct acct ab; |
| 75 | struct stat sb; |
| 76 | FILE *fp; |
| 77 | off_t size; |
| 78 | time_t t; |
| 79 | int ch; |
| 80 | const char *acctfile; |
| 81 | int flags = 0; |
| 82 | |
| 83 | acctfile = _PATH_ACCT; |
| 84 | while ((ch = getopt(argc, argv, "f:usecSE")) != -1) |
| 85 | switch((char)ch) { |
| 86 | case 'f': |
| 87 | acctfile = optarg; |
| 88 | break; |
| 89 | |
| 90 | case 'u': |
| 91 | flags |= AC_UTIME; /* user time */ |
| 92 | break; |
| 93 | case 's': |
| 94 | flags |= AC_STIME; /* system time */ |
| 95 | break; |
| 96 | case 'e': |
| 97 | flags |= AC_ETIME; /* elapsed time */ |
| 98 | break; |
| 99 | case 'c': |
| 100 | flags |= AC_CTIME; /* user + system time */ |
| 101 | break; |
| 102 | |
| 103 | case 'S': |
| 104 | flags |= AC_BTIME; /* starting time */ |
| 105 | break; |
| 106 | case 'E': |
| 107 | /* exit time (starting time + elapsed time )*/ |
| 108 | flags |= AC_FTIME; |
| 109 | break; |
| 110 | |
| 111 | case '?': |
| 112 | default: |
| 113 | usage(); |
| 114 | } |
| 115 | |
| 116 | /* default user + system time and starting time */ |
| 117 | if (!flags) { |
| 118 | flags = AC_CTIME | AC_BTIME; |
| 119 | } |
| 120 | |
| 121 | argc -= optind; |
| 122 | argv += optind; |
| 123 | |
| 124 | /* Open the file. */ |
| 125 | if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb)) |
| 126 | err(1, "%s", acctfile); |
| 127 | |
| 128 | /* |
| 129 | * Round off to integral number of accounting records, probably |
| 130 | * not necessary, but it doesn't hurt. |
| 131 | */ |
| 132 | size = sb.st_size - sb.st_size % sizeof(struct acct); |
| 133 | |
| 134 | /* Check if any records to display. */ |
| 135 | if ((unsigned)size < sizeof(struct acct)) |
| 136 | exit(0); |
| 137 | |
| 138 | /* |
| 139 | * Seek to before the last entry in the file; use lseek(2) in case |
| 140 | * the file is bigger than a "long". |
| 141 | */ |
| 142 | size -= sizeof(struct acct); |
| 143 | if (lseek(fileno(fp), size, SEEK_SET) == -1) |
| 144 | err(1, "%s", acctfile); |
| 145 | |
| 146 | for (;;) { |
| 147 | if (fread(&ab, sizeof(struct acct), 1, fp) != 1) |
| 148 | err(1, "%s", acctfile); |
| 149 | |
| 150 | if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1) |
| 151 | err(1, "%s", acctfile); |
| 152 | |
| 153 | if (size == 0) |
| 154 | break; |
| 155 | size -= sizeof(struct acct); |
| 156 | |
| 157 | if (ab.ac_comm[0] == '\0') { |
| 158 | ab.ac_comm[0] = '?'; |
| 159 | ab.ac_comm[1] = '\0'; |
| 160 | } else |
| 161 | for (p = &ab.ac_comm[0]; |
| 162 | p < &ab.ac_comm[AC_COMM_LEN] && *p; ++p) |
| 163 | if (!isprint(*p)) |
| 164 | *p = '?'; |
| 165 | if (*argv && !requested(argv, &ab)) |
| 166 | continue; |
| 167 | |
| 168 | (void)printf("%-*.*s %-7s %-*s %-*s", |
| 169 | AC_COMM_LEN, AC_COMM_LEN, ab.ac_comm, |
| 170 | flagbits(ab.ac_flag), |
| 171 | UT_NAMESIZE, user_from_uid(ab.ac_uid, 0), |
| 172 | UT_LINESIZE, getdev(ab.ac_tty)); |
| 173 | |
| 174 | |
| 175 | /* user + system time */ |
| 176 | if (flags & AC_CTIME) { |
| 177 | (void)printf(" %6.2f secs", |
| 178 | (expand(ab.ac_utime) + |
| 179 | expand(ab.ac_stime))/AC_HZ); |
| 180 | } |
| 181 | |
| 182 | /* usr time */ |
| 183 | if (flags & AC_UTIME) { |
| 184 | (void)printf(" %6.2f us", expand(ab.ac_utime)/AC_HZ); |
| 185 | } |
| 186 | |
| 187 | /* system time */ |
| 188 | if (flags & AC_STIME) { |
| 189 | (void)printf(" %6.2f sy", expand(ab.ac_stime)/AC_HZ); |
| 190 | } |
| 191 | |
| 192 | /* elapsed time */ |
| 193 | if (flags & AC_ETIME) { |
| 194 | (void)printf(" %8.2f es", expand(ab.ac_etime)/AC_HZ); |
| 195 | } |
| 196 | |
| 197 | /* starting time */ |
| 198 | if (flags & AC_BTIME) { |
| 199 | (void)printf(" %.16s", ctime(&ab.ac_btime)); |
| 200 | } |
| 201 | |
| 202 | /* exit time (starting time + elapsed time )*/ |
| 203 | if (flags & AC_FTIME) { |
| 204 | t = ab.ac_btime; |
| 205 | t += (time_t)(expand(ab.ac_etime)/AC_HZ); |
| 206 | (void)printf(" %.16s", ctime(&t)); |
| 207 | } |
| 208 | printf("\n"); |
| 209 | } |
| 210 | exit(0); |
| 211 | } |
| 212 | |
| 213 | time_t |
| 214 | expand(u_int t) |
| 215 | { |
| 216 | time_t nt; |
| 217 | |
| 218 | nt = t & 017777; |
| 219 | t >>= 13; |
| 220 | while (t) { |
| 221 | t--; |
| 222 | nt <<= 3; |
| 223 | } |
| 224 | return (nt); |
| 225 | } |
| 226 | |
| 227 | char * |
| 228 | flagbits(int f) |
| 229 | { |
| 230 | static char flags[20] = "-"; |
| 231 | char *p; |
| 232 | |
| 233 | #define BIT(flag, ch) if (f & flag) *p++ = ch |
| 234 | |
| 235 | p = flags + 1; |
| 236 | BIT(ASU, 'S'); |
| 237 | BIT(AFORK, 'F'); |
| 238 | BIT(ACOMPAT, 'C'); |
| 239 | BIT(ACORE, 'D'); |
| 240 | BIT(AXSIG, 'X'); |
| 241 | *p = '\0'; |
| 242 | return (flags); |
| 243 | } |
| 244 | |
| 245 | int |
| 246 | requested(char **argv, struct acct *acp) |
| 247 | { |
| 248 | const char *p; |
| 249 | |
| 250 | do { |
| 251 | p = user_from_uid(acp->ac_uid, 0); |
| 252 | if (!strcmp(p, *argv)) |
| 253 | return (1); |
| 254 | if ((p = getdev(acp->ac_tty)) && !strcmp(p, *argv)) |
| 255 | return (1); |
| 256 | if (!strncmp(acp->ac_comm, *argv, AC_COMM_LEN)) |
| 257 | return (1); |
| 258 | } while (*++argv); |
| 259 | return (0); |
| 260 | } |
| 261 | |
| 262 | const char * |
| 263 | getdev(dev_t dev) |
| 264 | { |
| 265 | static dev_t lastdev = (dev_t)-1; |
| 266 | static const char *lastname; |
| 267 | |
| 268 | if (dev == NODEV) /* Special case. */ |
| 269 | return ("__"); |
| 270 | if (dev == lastdev) /* One-element cache. */ |
| 271 | return (lastname); |
| 272 | lastdev = dev; |
| 273 | lastname = devname(dev, S_IFCHR); |
| 274 | return (lastname); |
| 275 | } |
| 276 | |
| 277 | static void |
| 278 | usage(void) |
| 279 | { |
| 280 | (void)fprintf(stderr, |
| 281 | "usage: lastcomm [-EScesu] [ -f file ] [command ...] [user ...] [tty ...]\n"); |
| 282 | exit(1); |
| 283 | } |