Annotation of src/usr.bin/lastcomm/lastcomm.c, Revision 1.14
1.14 ! deraadt 1: /* $OpenBSD: lastcomm.c,v 1.13 2003/06/26 21:59:11 deraadt Exp $ */
1.2 deraadt 2: /* $NetBSD: lastcomm.c,v 1.9 1995/10/22 01:43:42 ghudson Exp $ */
1.1 deraadt 3:
4: /*
5: * Copyright (c) 1980, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.11 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #ifndef lint
34: static char copyright[] =
35: "@(#) Copyright (c) 1980, 1993\n\
36: The Regents of the University of California. All rights reserved.\n";
37: #endif /* not lint */
38:
39: #ifndef lint
40: #if 0
41: static char sccsid[] = "@(#)lastcomm.c 8.2 (Berkeley) 4/29/95";
42: #endif
1.14 ! deraadt 43: static char rcsid[] = "$OpenBSD: lastcomm.c,v 1.13 2003/06/26 21:59:11 deraadt Exp $";
1.1 deraadt 44: #endif /* not lint */
45:
46: #include <sys/param.h>
47: #include <sys/stat.h>
48: #include <sys/acct.h>
49:
50: #include <ctype.h>
51: #include <err.h>
52: #include <fcntl.h>
1.2 deraadt 53: #include <math.h>
1.1 deraadt 54: #include <stdio.h>
55: #include <stdlib.h>
56: #include <string.h>
57: #include <struct.h>
1.2 deraadt 58: #include <tzfile.h>
1.1 deraadt 59: #include <unistd.h>
60: #include <utmp.h>
1.13 deraadt 61: #include <pwd.h>
1.1 deraadt 62: #include "pathnames.h"
63:
1.10 millert 64: time_t expand(u_int);
65: char *flagbits(int);
66: char *getdev(dev_t);
67: int requested(char *[], struct acct *);
68: void usage(void);
1.1 deraadt 69:
70: int
1.12 deraadt 71: main(int argc, char *argv[])
1.1 deraadt 72: {
1.9 mpech 73: char *p;
1.1 deraadt 74: struct acct ab;
75: struct stat sb;
76: FILE *fp;
77: off_t size;
78: time_t t;
1.2 deraadt 79: double delta;
1.1 deraadt 80: int ch;
81: char *acctfile;
82:
83: acctfile = _PATH_ACCT;
1.4 millert 84: while ((ch = getopt(argc, argv, "f:")) != -1)
1.1 deraadt 85: switch((char)ch) {
86: case 'f':
87: acctfile = optarg;
88: break;
89: case '?':
90: default:
91: usage();
92: }
93: argc -= optind;
94: argv += optind;
95:
96: /* Open the file. */
97: if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb))
98: err(1, "%s", acctfile);
99:
100: /*
101: * Round off to integral number of accounting records, probably
102: * not necessary, but it doesn't hurt.
103: */
104: size = sb.st_size - sb.st_size % sizeof(struct acct);
105:
106: /* Check if any records to display. */
107: if (size < sizeof(struct acct))
108: exit(0);
109:
110: /*
111: * Seek to before the last entry in the file; use lseek(2) in case
112: * the file is bigger than a "long".
113: */
114: size -= sizeof(struct acct);
115: if (lseek(fileno(fp), size, SEEK_SET) == -1)
116: err(1, "%s", acctfile);
117:
118: for (;;) {
119: if (fread(&ab, sizeof(struct acct), 1, fp) != 1)
120: err(1, "%s", acctfile);
121:
122: if (ab.ac_comm[0] == '\0') {
123: ab.ac_comm[0] = '?';
124: ab.ac_comm[1] = '\0';
125: } else
126: for (p = &ab.ac_comm[0];
127: p < &ab.ac_comm[fldsiz(acct, ac_comm)] && *p; ++p)
128: if (!isprint(*p))
129: *p = '?';
1.6 flipk 130: if (!*argv || requested(argv, &ab))
131: {
132: t = expand(ab.ac_utime) + expand(ab.ac_stime);
133: (void)printf("%-*.*s %-7s %-*.*s %-*.*s %6.2f secs %.16s",
1.7 deraadt 134: (int)fldsiz(acct, ac_comm),
135: (int)fldsiz(acct, ac_comm),
136: ab.ac_comm, flagbits(ab.ac_flag), UT_NAMESIZE,
137: UT_NAMESIZE, user_from_uid(ab.ac_uid, 0),
138: UT_LINESIZE, UT_LINESIZE, getdev(ab.ac_tty),
139: t / (double)AHZ, ctime(&ab.ac_btime));
1.6 flipk 140: delta = expand(ab.ac_etime) / (double)AHZ;
1.8 pvalchev 141: printf(" (%1.0f:%02.0f:%05.2f)\n",
1.7 deraadt 142: delta / SECSPERHOUR,
1.14 ! deraadt 143: fmod(delta, (double)SECSPERHOUR) / SECSPERMIN,
! 144: fmod(delta, (double)SECSPERMIN));
1.6 flipk 145: }
1.5 flipk 146:
147: if (size == 0)
148: break;
1.6 flipk 149: /* seek to previous entry */
150: if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1)
151: err(1, "%s", acctfile);
152: size -= sizeof(struct acct);
1.1 deraadt 153: }
154: exit(0);
155: }
156:
157: time_t
1.12 deraadt 158: expand(u_int t)
1.1 deraadt 159: {
1.9 mpech 160: time_t nt;
1.1 deraadt 161:
162: nt = t & 017777;
163: t >>= 13;
164: while (t) {
165: t--;
166: nt <<= 3;
167: }
168: return (nt);
169: }
170:
171: char *
1.12 deraadt 172: flagbits(int f)
1.1 deraadt 173: {
174: static char flags[20] = "-";
175: char *p;
176:
177: #define BIT(flag, ch) if (f & flag) *p++ = ch
178:
179: p = flags + 1;
180: BIT(ASU, 'S');
181: BIT(AFORK, 'F');
182: BIT(ACOMPAT, 'C');
183: BIT(ACORE, 'D');
184: BIT(AXSIG, 'X');
185: *p = '\0';
186: return (flags);
187: }
188:
189: int
1.12 deraadt 190: requested(char *argv[], struct acct *acp)
1.1 deraadt 191: {
192: do {
193: if (!strcmp(user_from_uid(acp->ac_uid, 0), *argv))
194: return (1);
195: if (!strcmp(getdev(acp->ac_tty), *argv))
196: return (1);
197: if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm)))
198: return (1);
199: } while (*++argv);
200: return (0);
201: }
202:
203: char *
1.12 deraadt 204: getdev(dev_t dev)
1.1 deraadt 205: {
206: static dev_t lastdev = (dev_t)-1;
207: static char *lastname;
208:
209: if (dev == NODEV) /* Special case. */
210: return ("__");
211: if (dev == lastdev) /* One-element cache. */
212: return (lastname);
213: lastdev = dev;
214: if ((lastname = devname(dev, S_IFCHR)) == NULL)
215: lastname = "??";
216: return (lastname);
217: }
218:
219: void
1.12 deraadt 220: usage(void)
1.1 deraadt 221: {
222: (void)fprintf(stderr,
223: "lastcomm [ -f file ] [command ...] [user ...] [tty ...]\n");
224: exit(1);
225: }
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