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 } 284