1 /* $NetBSD: lastcomm.c,v 1.14 1998/04/02 10:22:03 kleink Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)lastcomm.c 8.2 (Berkeley) 4/29/95"; 45 #endif 46 __RCSID("$NetBSD: lastcomm.c,v 1.14 1998/04/02 10:22:03 kleink Exp $"); 47 #endif /* not lint */ 48 49 #include <sys/param.h> 50 #include <sys/stat.h> 51 #include <sys/acct.h> 52 53 #include <ctype.h> 54 #include <err.h> 55 #include <fcntl.h> 56 #include <math.h> 57 #include <pwd.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <struct.h> 62 #include <time.h> 63 #include <tzfile.h> 64 #include <unistd.h> 65 #include <utmp.h> 66 #include "pathnames.h" 67 68 time_t expand __P((u_int)); 69 char *flagbits __P((int)); 70 char *getdev __P((dev_t)); 71 int main __P((int, char **)); 72 int requested __P((char *[], struct acct *)); 73 void usage __P((void)); 74 75 int 76 main(argc, argv) 77 int argc; 78 char *argv[]; 79 { 80 char *p; 81 struct acct ab; 82 struct stat sb; 83 FILE *fp; 84 off_t size; 85 time_t t; 86 double delta; 87 int ch; 88 char *acctfile; 89 90 acctfile = _PATH_ACCT; 91 while ((ch = getopt(argc, argv, "f:")) != -1) 92 switch((char)ch) { 93 case 'f': 94 acctfile = optarg; 95 break; 96 case '?': 97 default: 98 usage(); 99 } 100 argc -= optind; 101 argv += optind; 102 103 /* Open the file. */ 104 if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb)) 105 err(1, "%s", acctfile); 106 107 /* 108 * Round off to integral number of accounting records, probably 109 * not necessary, but it doesn't hurt. 110 */ 111 size = sb.st_size - sb.st_size % sizeof(struct acct); 112 113 /* Check if any records to display. */ 114 if (size < sizeof(struct acct)) 115 exit(0); 116 117 /* 118 * Seek to before the last entry in the file; use lseek(2) in case 119 * the file is bigger than a "long". 120 */ 121 size -= sizeof(struct acct); 122 if (lseek(fileno(fp), size, SEEK_SET) == -1) 123 err(1, "%s", acctfile); 124 125 for (;;) { 126 if (fread(&ab, sizeof(struct acct), 1, fp) != 1) 127 err(1, "%s", acctfile); 128 129 if (ab.ac_comm[0] == '\0') { 130 ab.ac_comm[0] = '?'; 131 ab.ac_comm[1] = '\0'; 132 } else 133 for (p = &ab.ac_comm[0]; 134 p < &ab.ac_comm[fldsiz(acct, ac_comm)] && *p; ++p) 135 if (!isprint(*p)) 136 *p = '?'; 137 if (!*argv || requested(argv, &ab)) { 138 139 t = expand(ab.ac_utime) + expand(ab.ac_stime); 140 (void)printf( 141 "%-*.*s %-7s %-*.*s %-*.*s %6.2f secs %.16s", 142 (int)fldsiz(acct, ac_comm), 143 (int)fldsiz(acct, ac_comm), 144 ab.ac_comm, flagbits(ab.ac_flag), 145 UT_NAMESIZE, UT_NAMESIZE, 146 user_from_uid(ab.ac_uid, 0), UT_LINESIZE, 147 UT_LINESIZE, getdev(ab.ac_tty), 148 t / (double)AHZ, ctime(&ab.ac_btime)); 149 delta = expand(ab.ac_etime) / (double)AHZ; 150 printf(" (%1.0f:%02.0f:%05.2f)\n", 151 delta / SECSPERHOUR, 152 fmod(delta, SECSPERHOUR) / SECSPERMIN, 153 fmod(delta, SECSPERMIN)); 154 } 155 /* are we at the beginning of the file yet? */ 156 if (size == 0) 157 break; 158 /* seek backward over the one we read and the next to read */ 159 if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1) 160 err(1, "%s", acctfile); 161 /* and account for its size */ 162 size -= sizeof(struct acct); 163 } 164 exit(0); 165 } 166 167 time_t 168 expand(t) 169 u_int t; 170 { 171 time_t nt; 172 173 nt = t & 017777; 174 t >>= 13; 175 while (t) { 176 t--; 177 nt <<= 3; 178 } 179 return (nt); 180 } 181 182 char * 183 flagbits(f) 184 int f; 185 { 186 static char flags[20] = "-"; 187 char *p; 188 189 #define BIT(flag, ch) if (f & flag) *p++ = ch 190 191 p = flags + 1; 192 BIT(ASU, 'S'); 193 BIT(AFORK, 'F'); 194 BIT(ACOMPAT, 'C'); 195 BIT(ACORE, 'D'); 196 BIT(AXSIG, 'X'); 197 *p = '\0'; 198 return (flags); 199 } 200 201 int 202 requested(argv, acp) 203 char *argv[]; 204 struct acct *acp; 205 { 206 do { 207 if (!strcmp(user_from_uid(acp->ac_uid, 0), *argv)) 208 return (1); 209 if (!strcmp(getdev(acp->ac_tty), *argv)) 210 return (1); 211 if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm))) 212 return (1); 213 } while (*++argv); 214 return (0); 215 } 216 217 char * 218 getdev(dev) 219 dev_t dev; 220 { 221 static dev_t lastdev = (dev_t)-1; 222 static char *lastname; 223 224 if (dev == NODEV) /* Special case. */ 225 return ("__"); 226 if (dev == lastdev) /* One-element cache. */ 227 return (lastname); 228 lastdev = dev; 229 if ((lastname = devname(dev, S_IFCHR)) == NULL) 230 lastname = "??"; 231 return (lastname); 232 } 233 234 void 235 usage() 236 { 237 (void)fprintf(stderr, 238 "lastcomm [ -f file ] [command ...] [user ...] [tty ...]\n"); 239 exit(1); 240 } 241