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 34 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1980, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)lastcomm.c 8.1 (Berkeley) 6/6/93"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/stat.h> 50 #include <sys/acct.h> 51 52 #include <ctype.h> 53 #include <err.h> 54 #include <fcntl.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <struct.h> 59 #include <unistd.h> 60 #include <utmp.h> 61 #include "pathnames.h" 62 63 time_t expand __P((u_int)); 64 char *flagbits __P((int)); 65 char *getdev __P((dev_t)); 66 int requested __P((char *[], struct acct *)); 67 static void usage __P((void)); 68 char *user_from_uid(); 69 70 #define AC_UTIME 1 /* user */ 71 #define AC_STIME 2 /* system */ 72 #define AC_ETIME 4 /* elapsed */ 73 #define AC_CTIME 8 /* user + system time, default */ 74 75 #define AC_BTIME 16 /* starting time */ 76 #define AC_FTIME 32 /* exit time (starting time + elapsed time )*/ 77 78 #define AC_HZ ((double)AHZ) 79 80 int 81 main(argc, argv) 82 int argc; 83 char *argv[]; 84 { 85 register char *p; 86 struct acct ab; 87 struct stat sb; 88 FILE *fp; 89 off_t size; 90 time_t t; 91 int ch; 92 char *acctfile; 93 int time = 0; 94 95 acctfile = _PATH_ACCT; 96 while ((ch = getopt(argc, argv, "f:usecSE")) != -1) 97 switch((char)ch) { 98 case 'f': 99 acctfile = optarg; 100 break; 101 102 case 'u': 103 time |= AC_UTIME; /* user time */ 104 break; 105 case 's': 106 time |= AC_STIME; /* system time */ 107 break; 108 case 'e': 109 time |= AC_ETIME; /* elapsed time */ 110 break; 111 case 'c': 112 time |= AC_CTIME; /* user + system time */ 113 break; 114 115 case 'S': 116 time |= AC_BTIME; /* starting time */ 117 break; 118 case 'E': 119 /* exit time (starting time + elapsed time )*/ 120 time |= AC_FTIME; 121 break; 122 123 case '?': 124 default: 125 usage(); 126 } 127 128 /* default user + system time and starting time */ 129 if (!time) { 130 time = AC_CTIME | AC_BTIME; 131 } 132 133 argc -= optind; 134 argv += optind; 135 136 /* Open the file. */ 137 if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb)) 138 err(1, "%s", acctfile); 139 140 /* 141 * Round off to integral number of accounting records, probably 142 * not necessary, but it doesn't hurt. 143 */ 144 size = sb.st_size - sb.st_size % sizeof(struct acct); 145 146 /* Check if any records to display. */ 147 if (size < sizeof(struct acct)) 148 exit(0); 149 150 /* 151 * Seek to before the last entry in the file; use lseek(2) in case 152 * the file is bigger than a "long". 153 */ 154 size -= sizeof(struct acct); 155 if (lseek(fileno(fp), size, SEEK_SET) == -1) 156 err(1, "%s", acctfile); 157 158 for (;;) { 159 if (fread(&ab, sizeof(struct acct), 1, fp) != 1) 160 err(1, "%s", acctfile); 161 162 if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1) 163 err(1, "%s", acctfile); 164 165 if (size == 0) 166 break; 167 size -= sizeof(struct acct); 168 169 if (ab.ac_comm[0] == '\0') { 170 ab.ac_comm[0] = '?'; 171 ab.ac_comm[1] = '\0'; 172 } else 173 for (p = &ab.ac_comm[0]; 174 p < &ab.ac_comm[fldsiz(acct, ac_comm)] && *p; ++p) 175 if (!isprint(*p)) 176 *p = '?'; 177 if (*argv && !requested(argv, &ab)) 178 continue; 179 180 (void)printf("%-*.*s %-7s %-*s %-*s ", 181 fldsiz(acct, ac_comm), 182 fldsiz(acct, ac_comm), ab.ac_comm, 183 flagbits(ab.ac_flag), 184 UT_NAMESIZE, user_from_uid(ab.ac_uid, 0), 185 UT_LINESIZE, getdev(ab.ac_tty)); 186 187 188 /* user + system time */ 189 if (time & AC_CTIME) { 190 (void)printf("%6.2f secs ", 191 (expand(ab.ac_utime) + 192 expand(ab.ac_stime))/AC_HZ); 193 } 194 195 /* usr time */ 196 if (time & AC_UTIME) { 197 (void)printf("%6.2f us ", expand(ab.ac_utime)/AC_HZ); 198 } 199 200 /* system time */ 201 if (time & AC_STIME) { 202 (void)printf("%6.2f sy ", expand(ab.ac_stime)/AC_HZ); 203 } 204 205 /* elapsed time */ 206 if (time & AC_ETIME) { 207 (void)printf("%8.2f es ", expand(ab.ac_etime)/AC_HZ); 208 } 209 210 /* starting time */ 211 if (time & AC_BTIME) { 212 (void)printf("%.16s ", ctime(&ab.ac_btime)); 213 } 214 215 /* exit time (starting time + elapsed time )*/ 216 if (time & AC_FTIME) { 217 t = ab.ac_btime; 218 t += (time_t)(expand(ab.ac_etime)/AC_HZ); 219 (void)printf("%.16s ", 220 ctime(&t)); 221 } 222 printf("\n"); 223 } 224 exit(0); 225 } 226 227 time_t 228 expand(t) 229 u_int t; 230 { 231 register time_t nt; 232 233 nt = t & 017777; 234 t >>= 13; 235 while (t) { 236 t--; 237 nt <<= 3; 238 } 239 return (nt); 240 } 241 242 char * 243 flagbits(f) 244 register int f; 245 { 246 static char flags[20] = "-"; 247 char *p; 248 249 #define BIT(flag, ch) if (f & flag) *p++ = ch 250 251 p = flags + 1; 252 BIT(ASU, 'S'); 253 BIT(AFORK, 'F'); 254 BIT(ACOMPAT, 'C'); 255 BIT(ACORE, 'D'); 256 BIT(AXSIG, 'X'); 257 *p = '\0'; 258 return (flags); 259 } 260 261 int 262 requested(argv, acp) 263 register char *argv[]; 264 register struct acct *acp; 265 { 266 register char *p; 267 268 do { 269 p = user_from_uid(acp->ac_uid, 0); 270 if (!strcmp(p, *argv)) 271 return (1); 272 if ((p = getdev(acp->ac_tty)) && !strcmp(p, *argv)) 273 return (1); 274 if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm))) 275 return (1); 276 } while (*++argv); 277 return (0); 278 } 279 280 char * 281 getdev(dev) 282 dev_t dev; 283 { 284 static dev_t lastdev = (dev_t)-1; 285 static char *lastname; 286 287 if (dev == NODEV) /* Special case. */ 288 return ("__"); 289 if (dev == lastdev) /* One-element cache. */ 290 return (lastname); 291 lastdev = dev; 292 lastname = devname(dev, S_IFCHR); 293 return (lastname); 294 } 295 296 static void 297 usage() 298 { 299 (void)fprintf(stderr, 300 "usage: lastcomm [-EScesu] [ -f file ] [command ...] [user ...] [tty ...]\n"); 301 exit(1); 302 } 303