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