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 <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 #include <utmp.h> 51 #include "pathnames.h" 52 53 time_t expand(u_int); 54 char *flagbits(int); 55 const char *getdev(dev_t); 56 int requested(char *[], struct acct *); 57 static void usage(void); 58 59 #define AC_UTIME 1 /* user */ 60 #define AC_STIME 2 /* system */ 61 #define AC_ETIME 4 /* elapsed */ 62 #define AC_CTIME 8 /* user + system time, default */ 63 64 #define AC_BTIME 16 /* starting time */ 65 #define AC_FTIME 32 /* exit time (starting time + elapsed time )*/ 66 67 #define AC_HZ ((double)AHZ) 68 69 int 70 main(int argc, char **argv) 71 { 72 char *p; 73 struct acct ab; 74 struct stat sb; 75 FILE *fp; 76 off_t size; 77 time_t t; 78 int ch; 79 const char *acctfile; 80 int flags = 0; 81 82 acctfile = _PATH_ACCT; 83 while ((ch = getopt(argc, argv, "f:usecSE")) != -1) 84 switch((char)ch) { 85 case 'f': 86 acctfile = optarg; 87 break; 88 89 case 'u': 90 flags |= AC_UTIME; /* user time */ 91 break; 92 case 's': 93 flags |= AC_STIME; /* system time */ 94 break; 95 case 'e': 96 flags |= AC_ETIME; /* elapsed time */ 97 break; 98 case 'c': 99 flags |= AC_CTIME; /* user + system time */ 100 break; 101 102 case 'S': 103 flags |= AC_BTIME; /* starting time */ 104 break; 105 case 'E': 106 /* exit time (starting time + elapsed time )*/ 107 flags |= AC_FTIME; 108 break; 109 110 case '?': 111 default: 112 usage(); 113 } 114 115 /* default user + system time and starting time */ 116 if (!flags) { 117 flags = AC_CTIME | AC_BTIME; 118 } 119 120 argc -= optind; 121 argv += optind; 122 123 /* Open the file. */ 124 if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb)) 125 err(1, "%s", acctfile); 126 127 /* 128 * Round off to integral number of accounting records, probably 129 * not necessary, but it doesn't hurt. 130 */ 131 size = sb.st_size - sb.st_size % sizeof(struct acct); 132 133 /* Check if any records to display. */ 134 if ((unsigned)size < sizeof(struct acct)) 135 exit(0); 136 137 /* 138 * Seek to before the last entry in the file; use lseek(2) in case 139 * the file is bigger than a "long". 140 */ 141 size -= sizeof(struct acct); 142 if (lseek(fileno(fp), size, SEEK_SET) == -1) 143 err(1, "%s", acctfile); 144 145 for (;;) { 146 if (fread(&ab, sizeof(struct acct), 1, fp) != 1) 147 err(1, "%s", acctfile); 148 149 if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1) 150 err(1, "%s", acctfile); 151 152 if (size == 0) 153 break; 154 size -= sizeof(struct acct); 155 156 if (ab.ac_comm[0] == '\0') { 157 ab.ac_comm[0] = '?'; 158 ab.ac_comm[1] = '\0'; 159 } else 160 for (p = &ab.ac_comm[0]; 161 p < &ab.ac_comm[AC_COMM_LEN] && *p; ++p) 162 if (!isprint(*p)) 163 *p = '?'; 164 if (*argv && !requested(argv, &ab)) 165 continue; 166 167 (void)printf("%-*.*s %-7s %-*s %-*s", 168 AC_COMM_LEN, AC_COMM_LEN, ab.ac_comm, 169 flagbits(ab.ac_flag), 170 UT_NAMESIZE, user_from_uid(ab.ac_uid, 0), 171 UT_LINESIZE, getdev(ab.ac_tty)); 172 173 174 /* user + system time */ 175 if (flags & AC_CTIME) { 176 (void)printf(" %6.2f secs", 177 (expand(ab.ac_utime) + 178 expand(ab.ac_stime))/AC_HZ); 179 } 180 181 /* usr time */ 182 if (flags & AC_UTIME) { 183 (void)printf(" %6.2f us", expand(ab.ac_utime)/AC_HZ); 184 } 185 186 /* system time */ 187 if (flags & AC_STIME) { 188 (void)printf(" %6.2f sy", expand(ab.ac_stime)/AC_HZ); 189 } 190 191 /* elapsed time */ 192 if (flags & AC_ETIME) { 193 (void)printf(" %8.2f es", expand(ab.ac_etime)/AC_HZ); 194 } 195 196 /* starting time */ 197 if (flags & AC_BTIME) { 198 (void)printf(" %.16s", ctime(&ab.ac_btime)); 199 } 200 201 /* exit time (starting time + elapsed time )*/ 202 if (flags & AC_FTIME) { 203 t = ab.ac_btime; 204 t += (time_t)(expand(ab.ac_etime)/AC_HZ); 205 (void)printf(" %.16s", ctime(&t)); 206 } 207 printf("\n"); 208 } 209 exit(0); 210 } 211 212 time_t 213 expand(u_int t) 214 { 215 time_t nt; 216 217 nt = t & 017777; 218 t >>= 13; 219 while (t) { 220 t--; 221 nt <<= 3; 222 } 223 return (nt); 224 } 225 226 char * 227 flagbits(int f) 228 { 229 static char flags[20] = "-"; 230 char *p; 231 232 #define BIT(flag, ch) if (f & flag) *p++ = ch 233 234 p = flags + 1; 235 BIT(ASU, 'S'); 236 BIT(AFORK, 'F'); 237 BIT(ACOMPAT, 'C'); 238 BIT(ACORE, 'D'); 239 BIT(AXSIG, 'X'); 240 *p = '\0'; 241 return (flags); 242 } 243 244 int 245 requested(char **argv, struct acct *acp) 246 { 247 const char *p; 248 249 do { 250 p = user_from_uid(acp->ac_uid, 0); 251 if (!strcmp(p, *argv)) 252 return (1); 253 if ((p = getdev(acp->ac_tty)) && !strcmp(p, *argv)) 254 return (1); 255 if (!strncmp(acp->ac_comm, *argv, AC_COMM_LEN)) 256 return (1); 257 } while (*++argv); 258 return (0); 259 } 260 261 const char * 262 getdev(dev_t dev) 263 { 264 static dev_t lastdev = (dev_t)-1; 265 static const char *lastname; 266 267 if (dev == NODEV) /* Special case. */ 268 return ("__"); 269 if (dev == lastdev) /* One-element cache. */ 270 return (lastname); 271 lastdev = dev; 272 lastname = devname(dev, S_IFCHR); 273 return (lastname); 274 } 275 276 static void 277 usage(void) 278 { 279 (void)fprintf(stderr, 280 "usage: lastcomm [-EScesu] [ -f file ] [command ...] [user ...] [tty ...]\n"); 281 exit(1); 282 } 283