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