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 /*XXX*/#include <inttypes.h> 64 65 time_t expand(u_int); 66 char *flagbits(int); 67 const char *getdev(dev_t); 68 int requested(char *[], struct acct *); 69 static void usage(void); 70 71 #define AC_UTIME 1 /* user */ 72 #define AC_STIME 2 /* system */ 73 #define AC_ETIME 4 /* elapsed */ 74 #define AC_CTIME 8 /* user + system time, default */ 75 76 #define AC_BTIME 16 /* starting time */ 77 #define AC_FTIME 32 /* exit time (starting time + elapsed time )*/ 78 79 #define AC_HZ ((double)AHZ) 80 81 int 82 main(int argc, 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 (ab.ac_comm[0] == '\0') { 162 ab.ac_comm[0] = '?'; 163 ab.ac_comm[1] = '\0'; 164 } else 165 for (p = &ab.ac_comm[0]; 166 p < &ab.ac_comm[AC_COMM_LEN] && *p; ++p) 167 if (!isprint(*p)) 168 *p = '?'; 169 if (*argv && !requested(argv, &ab)) 170 continue; 171 172 (void)printf("%-*.*s %-7s %-*s %-*s", 173 AC_COMM_LEN, AC_COMM_LEN, ab.ac_comm, 174 flagbits(ab.ac_flag), 175 UT_NAMESIZE, user_from_uid(ab.ac_uid, 0), 176 UT_LINESIZE, getdev(ab.ac_tty)); 177 178 179 /* user + system time */ 180 if (flags & AC_CTIME) { 181 (void)printf(" %6.2f secs", 182 (expand(ab.ac_utime) + 183 expand(ab.ac_stime))/AC_HZ); 184 } 185 186 /* usr time */ 187 if (flags & AC_UTIME) { 188 (void)printf(" %6.2f us", expand(ab.ac_utime)/AC_HZ); 189 } 190 191 /* system time */ 192 if (flags & AC_STIME) { 193 (void)printf(" %6.2f sy", expand(ab.ac_stime)/AC_HZ); 194 } 195 196 /* elapsed time */ 197 if (flags & AC_ETIME) { 198 (void)printf(" %8.2f es", expand(ab.ac_etime)/AC_HZ); 199 } 200 201 /* starting time */ 202 if (flags & AC_BTIME) { 203 (void)printf(" %.16s", ctime(&ab.ac_btime)); 204 } 205 206 /* exit time (starting time + elapsed time )*/ 207 if (flags & AC_FTIME) { 208 t = ab.ac_btime; 209 t += (time_t)(expand(ab.ac_etime)/AC_HZ); 210 (void)printf(" %.16s", ctime(&t)); 211 } 212 printf("\n"); 213 214 if (size == 0) 215 break; 216 size -= sizeof(struct acct); 217 if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1) 218 err(1, "%s", acctfile); 219 } 220 exit(0); 221 } 222 223 time_t 224 expand(u_int t) 225 { 226 time_t nt; 227 228 nt = t & 017777; 229 t >>= 13; 230 while (t) { 231 t--; 232 nt <<= 3; 233 } 234 return (nt); 235 } 236 237 char * 238 flagbits(int f) 239 { 240 static char flags[20] = "-"; 241 char *p; 242 243 #define BIT(flag, ch) if (f & flag) *p++ = ch 244 245 p = flags + 1; 246 BIT(ASU, 'S'); 247 BIT(AFORK, 'F'); 248 BIT(ACOMPAT, 'C'); 249 BIT(ACORE, 'D'); 250 BIT(AXSIG, 'X'); 251 *p = '\0'; 252 return (flags); 253 } 254 255 int 256 requested(char *argv[], struct acct *acp) 257 { 258 const char *p; 259 260 do { 261 p = user_from_uid(acp->ac_uid, 0); 262 if (!strcmp(p, *argv)) 263 return (1); 264 if ((p = getdev(acp->ac_tty)) && !strcmp(p, *argv)) 265 return (1); 266 if (!strncmp(acp->ac_comm, *argv, AC_COMM_LEN)) 267 return (1); 268 } while (*++argv); 269 return (0); 270 } 271 272 const char * 273 getdev(dev_t dev) 274 { 275 static dev_t lastdev = (dev_t)-1; 276 static const char *lastname; 277 278 if (dev == NODEV) /* Special case. */ 279 return ("__"); 280 if (dev == lastdev) /* One-element cache. */ 281 return (lastname); 282 lastdev = dev; 283 lastname = devname(dev, S_IFCHR); 284 return (lastname); 285 } 286 287 static void 288 usage(void) 289 { 290 (void)fprintf(stderr, 291 "usage: lastcomm [-EScesu] [ -f file ] [command ...] [user ...] [tty ...]\n"); 292 exit(1); 293 } 294