121563Sdist /* 221563Sdist * Copyright (c) 1980 Regents of the University of California. 334033Sbostic * All rights reserved. 434033Sbostic * 542735Sbostic * %sccs.include.redist.c% 621563Sdist */ 721563Sdist 811839Ssam #ifndef lint 921563Sdist char copyright[] = 1021563Sdist "@(#) Copyright (c) 1980 Regents of the University of California.\n\ 1121563Sdist All rights reserved.\n"; 1234033Sbostic #endif /* not lint */ 131037Sbill 1421563Sdist #ifndef lint 15*55085Sbostic static char sccsid[] = "@(#)lastcomm.c 5.12 (Berkeley) 07/12/92"; 1634033Sbostic #endif /* not lint */ 1721563Sdist 1811839Ssam #include <sys/param.h> 19*55085Sbostic #include <sys/stat.h> 2011839Ssam #include <sys/acct.h> 21*55085Sbostic 22*55085Sbostic #include <fcntl.h> 2311839Ssam #include <utmp.h> 2411839Ssam #include <struct.h> 25*55085Sbostic #include <errno.h> 26*55085Sbostic #include <unistd.h> 27*55085Sbostic #include <stdlib.h> 28*55085Sbostic #include <stdio.h> 2911839Ssam #include <ctype.h> 30*55085Sbostic #include <string.h> 3137848Sbostic #include "pathnames.h" 321037Sbill 33*55085Sbostic char *devname __P((dev_t, mode_t)); 34*55085Sbostic void err __P((const char *, ...)); 35*55085Sbostic time_t expand __P((u_int)); 36*55085Sbostic char *flagbits __P((int)); 37*55085Sbostic char *getdev __P((dev_t)); 38*55085Sbostic int requested __P((char *[], struct acct *)); 39*55085Sbostic void usage __P((void)); 40*55085Sbostic char *user_from_uid(); 411037Sbill 42*55085Sbostic int 4311839Ssam main(argc, argv) 4433688Sbostic int argc; 4511839Ssam char *argv[]; 461037Sbill { 47*55085Sbostic register char *p; 48*55085Sbostic struct acct ab; 4913188Ssam struct stat sb; 50*55085Sbostic FILE *fp; 51*55085Sbostic off_t size; 52*55085Sbostic time_t t; 53*55085Sbostic int ch; 54*55085Sbostic char *acctfile; 551037Sbill 5637848Sbostic acctfile = _PATH_ACCT; 5733688Sbostic while ((ch = getopt(argc, argv, "f:")) != EOF) 5833688Sbostic switch((char)ch) { 5933688Sbostic case 'f': 6033688Sbostic acctfile = optarg; 6133688Sbostic break; 6233688Sbostic case '?': 6333688Sbostic default: 64*55085Sbostic usage(); 6533688Sbostic } 66*55085Sbostic argc -= optind; 6733688Sbostic argv += optind; 6837848Sbostic 69*55085Sbostic /* Open the file. */ 70*55085Sbostic if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb)) 71*55085Sbostic err("%s: %s\n", acctfile, strerror(errno)); 72*55085Sbostic 73*55085Sbostic /* 74*55085Sbostic * Round off to integral number of accounting records, probably 75*55085Sbostic * not necessary, but it doesn't hurt. 76*55085Sbostic */ 77*55085Sbostic size = sb.st_size - sb.st_size % sizeof(struct acct); 78*55085Sbostic 79*55085Sbostic /* Check if any records to display. */ 80*55085Sbostic if (size < sizeof(struct acct)) 81*55085Sbostic exit(0); 82*55085Sbostic 83*55085Sbostic /* 84*55085Sbostic * Seek to before the last entry in the file; use lseek(2) in case 85*55085Sbostic * the file is bigger than a "long". 86*55085Sbostic */ 87*55085Sbostic size -= sizeof(struct acct); 88*55085Sbostic if (lseek(fileno(fp), size, SEEK_SET) == -1) 89*55085Sbostic err("%s: %s\n", acctfile, strerror(errno)); 90*55085Sbostic 91*55085Sbostic for (;;) { 92*55085Sbostic if (fread(&ab, sizeof(struct acct), 1, fp) != 1) 93*55085Sbostic err("%s: %s\n", acctfile, strerror(errno)); 94*55085Sbostic 95*55085Sbostic if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1) 96*55085Sbostic err("%s: %s\n", acctfile, strerror(errno)); 97*55085Sbostic 98*55085Sbostic if (size == 0) 9913188Ssam break; 100*55085Sbostic size -= sizeof(struct acct); 1011037Sbill 102*55085Sbostic if (ab.ac_comm[0] == '\0') { 103*55085Sbostic ab.ac_comm[0] = '?'; 104*55085Sbostic ab.ac_comm[1] = '\0'; 105*55085Sbostic } else 106*55085Sbostic for (p = &ab.ac_comm[0]; 107*55085Sbostic p < &ab.ac_comm[fldsiz(acct, ac_comm)] && *p; ++p) 108*55085Sbostic if (!isprint(*p)) 109*55085Sbostic *p = '?'; 110*55085Sbostic if (*argv && !requested(argv, &ab)) 111*55085Sbostic continue; 112*55085Sbostic 113*55085Sbostic t = expand(ab.ac_utime) + expand(ab.ac_stime); 114*55085Sbostic (void)printf("%-*s %-7s %-*s %-*s %6.2f secs %.16s\n", 115*55085Sbostic fldsiz(acct, ac_comm), ab.ac_comm, flagbits(ab.ac_flag), 116*55085Sbostic UT_NAMESIZE, user_from_uid(ab.ac_uid, 0), 117*55085Sbostic UT_LINESIZE, getdev(ab.ac_tty), 118*55085Sbostic t / (double)AHZ, ctime(&ab.ac_btime)); 1191037Sbill } 120*55085Sbostic exit(0); 1211037Sbill } 1221037Sbill 1231037Sbill time_t 124*55085Sbostic expand(t) 125*55085Sbostic u_int t; 1261037Sbill { 1271037Sbill register time_t nt; 1281037Sbill 1291037Sbill nt = t & 017777; 1301037Sbill t >>= 13; 13111839Ssam while (t) { 1321037Sbill t--; 1331037Sbill nt <<= 3; 1341037Sbill } 1351037Sbill return (nt); 1361037Sbill } 1371037Sbill 1387457Skre char * 1397457Skre flagbits(f) 14011839Ssam register int f; 1411037Sbill { 142*55085Sbostic static char flags[20] = "-"; 143*55085Sbostic char *p; 1447457Skre 145*55085Sbostic #define BIT(flag, ch) if (f & flag) *p++ = ch 146*55085Sbostic 147*55085Sbostic p = flags + 1; 14811839Ssam BIT(ASU, 'S'); 14911839Ssam BIT(AFORK, 'F'); 15011839Ssam BIT(ACOMPAT, 'C'); 15111839Ssam BIT(ACORE, 'D'); 15211839Ssam BIT(AXSIG, 'X'); 153*55085Sbostic *p = '\0'; 15411839Ssam return (flags); 1557457Skre } 1567457Skre 157*55085Sbostic int 158*55085Sbostic requested(argv, acp) 15913188Ssam register char *argv[]; 16013188Ssam register struct acct *acp; 16113188Ssam { 162*55085Sbostic register char *p; 16313188Ssam 16433688Sbostic do { 165*55085Sbostic p = user_from_uid(acp->ac_uid, 0); 166*55085Sbostic if (!strcmp(p, *argv)) 167*55085Sbostic return (1); 168*55085Sbostic if ((p = getdev(acp->ac_tty)) && !strcmp(p, *argv)) 169*55085Sbostic return (1); 17040266Sbostic if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm))) 171*55085Sbostic return (1); 17233688Sbostic } while (*++argv); 173*55085Sbostic return (0); 17413188Ssam } 17513188Ssam 1767457Skre char * 17713188Ssam getdev(dev) 17811839Ssam dev_t dev; 1797457Skre { 180*55085Sbostic static dev_t lastdev = (dev_t)-1; 1817457Skre static char *lastname; 1827457Skre 183*55085Sbostic if (dev == NODEV) /* Special case. */ 18411839Ssam return ("__"); 185*55085Sbostic if (dev == lastdev) /* One-element cache. */ 18611839Ssam return (lastname); 187*55085Sbostic lastdev = dev; 188*55085Sbostic lastname = devname(dev, S_IFCHR); 189*55085Sbostic return (lastname); 1907457Skre } 191*55085Sbostic 192*55085Sbostic void 193*55085Sbostic usage() 194*55085Sbostic { 195*55085Sbostic (void)fprintf(stderr, 196*55085Sbostic "lastcomm [ -f file ] [command ...] [user ...] [tty ...]\n"); 197*55085Sbostic exit(1); 198*55085Sbostic } 199*55085Sbostic 200*55085Sbostic #if __STDC__ 201*55085Sbostic #include <stdarg.h> 202*55085Sbostic #else 203*55085Sbostic #include <varargs.h> 204*55085Sbostic #endif 205*55085Sbostic 206*55085Sbostic void 207*55085Sbostic #if __STDC__ 208*55085Sbostic err(const char *fmt, ...) 209*55085Sbostic #else 210*55085Sbostic err(fmt, va_alist) 211*55085Sbostic char *fmt; 212*55085Sbostic va_dcl 213*55085Sbostic #endif 214*55085Sbostic { 215*55085Sbostic va_list ap; 216*55085Sbostic #if __STDC__ 217*55085Sbostic va_start(ap, fmt); 218*55085Sbostic #else 219*55085Sbostic va_start(ap); 220*55085Sbostic #endif 221*55085Sbostic (void)fprintf(stderr, "lastcomm: "); 222*55085Sbostic (void)vfprintf(stderr, fmt, ap); 223*55085Sbostic va_end(ap); 224*55085Sbostic (void)fprintf(stderr, "\n"); 225*55085Sbostic exit(1); 226*55085Sbostic /* NOTREACHED */ 227*55085Sbostic } 228