Annotation of src/usr.bin/lastcomm/lastcomm.c, Revision 1.11
1.11 ! millert 1: /* $OpenBSD: lastcomm.c,v 1.10 2002/02/16 21:27:47 millert 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
1.11 ! millert 43: static char rcsid[] = "$OpenBSD: lastcomm.c,v 1.10 2002/02/16 21:27:47 millert 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>
61: #include "pathnames.h"
62:
1.10 millert 63: time_t expand(u_int);
64: char *flagbits(int);
65: char *getdev(dev_t);
66: int requested(char *[], struct acct *);
67: void usage(void);
1.1 deraadt 68: char *user_from_uid();
69:
70: int
71: main(argc, argv)
72: int argc;
73: char *argv[];
74: {
1.9 mpech 75: char *p;
1.1 deraadt 76: struct acct ab;
77: struct stat sb;
78: FILE *fp;
79: off_t size;
80: time_t t;
1.2 deraadt 81: double delta;
1.1 deraadt 82: int ch;
83: char *acctfile;
84:
85: acctfile = _PATH_ACCT;
1.4 millert 86: while ((ch = getopt(argc, argv, "f:")) != -1)
1.1 deraadt 87: switch((char)ch) {
88: case 'f':
89: acctfile = optarg;
90: break;
91: case '?':
92: default:
93: usage();
94: }
95: argc -= optind;
96: argv += optind;
97:
98: /* Open the file. */
99: if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb))
100: err(1, "%s", acctfile);
101:
102: /*
103: * Round off to integral number of accounting records, probably
104: * not necessary, but it doesn't hurt.
105: */
106: size = sb.st_size - sb.st_size % sizeof(struct acct);
107:
108: /* Check if any records to display. */
109: if (size < sizeof(struct acct))
110: exit(0);
111:
112: /*
113: * Seek to before the last entry in the file; use lseek(2) in case
114: * the file is bigger than a "long".
115: */
116: size -= sizeof(struct acct);
117: if (lseek(fileno(fp), size, SEEK_SET) == -1)
118: err(1, "%s", acctfile);
119:
120: for (;;) {
121: if (fread(&ab, sizeof(struct acct), 1, fp) != 1)
122: err(1, "%s", acctfile);
123:
124: if (ab.ac_comm[0] == '\0') {
125: ab.ac_comm[0] = '?';
126: ab.ac_comm[1] = '\0';
127: } else
128: for (p = &ab.ac_comm[0];
129: p < &ab.ac_comm[fldsiz(acct, ac_comm)] && *p; ++p)
130: if (!isprint(*p))
131: *p = '?';
1.6 flipk 132: if (!*argv || requested(argv, &ab))
133: {
134: t = expand(ab.ac_utime) + expand(ab.ac_stime);
135: (void)printf("%-*.*s %-7s %-*.*s %-*.*s %6.2f secs %.16s",
1.7 deraadt 136: (int)fldsiz(acct, ac_comm),
137: (int)fldsiz(acct, ac_comm),
138: ab.ac_comm, flagbits(ab.ac_flag), UT_NAMESIZE,
139: UT_NAMESIZE, user_from_uid(ab.ac_uid, 0),
140: UT_LINESIZE, UT_LINESIZE, getdev(ab.ac_tty),
141: t / (double)AHZ, ctime(&ab.ac_btime));
1.6 flipk 142: delta = expand(ab.ac_etime) / (double)AHZ;
1.8 pvalchev 143: printf(" (%1.0f:%02.0f:%05.2f)\n",
1.7 deraadt 144: delta / SECSPERHOUR,
145: fmod(delta, SECSPERHOUR) / SECSPERMIN,
146: fmod(delta, SECSPERMIN));
1.6 flipk 147: }
1.5 flipk 148:
149: if (size == 0)
150: break;
1.6 flipk 151: /* seek to previous entry */
152: if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1)
153: err(1, "%s", acctfile);
154: size -= sizeof(struct acct);
1.1 deraadt 155: }
156: exit(0);
157: }
158:
159: time_t
160: expand(t)
161: u_int t;
162: {
1.9 mpech 163: time_t nt;
1.1 deraadt 164:
165: nt = t & 017777;
166: t >>= 13;
167: while (t) {
168: t--;
169: nt <<= 3;
170: }
171: return (nt);
172: }
173:
174: char *
175: flagbits(f)
1.9 mpech 176: int f;
1.1 deraadt 177: {
178: static char flags[20] = "-";
179: char *p;
180:
181: #define BIT(flag, ch) if (f & flag) *p++ = ch
182:
183: p = flags + 1;
184: BIT(ASU, 'S');
185: BIT(AFORK, 'F');
186: BIT(ACOMPAT, 'C');
187: BIT(ACORE, 'D');
188: BIT(AXSIG, 'X');
189: *p = '\0';
190: return (flags);
191: }
192:
193: int
194: requested(argv, acp)
1.9 mpech 195: char *argv[];
196: struct acct *acp;
1.1 deraadt 197: {
198: do {
199: if (!strcmp(user_from_uid(acp->ac_uid, 0), *argv))
200: return (1);
201: if (!strcmp(getdev(acp->ac_tty), *argv))
202: return (1);
203: if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm)))
204: return (1);
205: } while (*++argv);
206: return (0);
207: }
208:
209: char *
210: getdev(dev)
211: dev_t dev;
212: {
213: static dev_t lastdev = (dev_t)-1;
214: static char *lastname;
215:
216: if (dev == NODEV) /* Special case. */
217: return ("__");
218: if (dev == lastdev) /* One-element cache. */
219: return (lastname);
220: lastdev = dev;
221: if ((lastname = devname(dev, S_IFCHR)) == NULL)
222: lastname = "??";
223: return (lastname);
224: }
225:
226: void
227: usage()
228: {
229: (void)fprintf(stderr,
230: "lastcomm [ -f file ] [command ...] [user ...] [tty ...]\n");
231: exit(1);
232: }
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