Annotation of src/usr.bin/lastcomm/lastcomm.c, Revision 1.3
1.3 ! deraadt 1: /* $OpenBSD: lastcomm.c,v 1.9 1995/10/22 01:43:42 ghudson 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.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: static char copyright[] =
39: "@(#) Copyright (c) 1980, 1993\n\
40: The Regents of the University of California. All rights reserved.\n";
41: #endif /* not lint */
42:
43: #ifndef lint
44: #if 0
45: static char sccsid[] = "@(#)lastcomm.c 8.2 (Berkeley) 4/29/95";
46: #endif
1.3 ! deraadt 47: static char rcsid[] = "$OpenBSD: lastcomm.c,v 1.9 1995/10/22 01:43:42 ghudson Exp $";
1.1 deraadt 48: #endif /* not lint */
49:
50: #include <sys/param.h>
51: #include <sys/stat.h>
52: #include <sys/acct.h>
53:
54: #include <ctype.h>
55: #include <err.h>
56: #include <fcntl.h>
1.2 deraadt 57: #include <math.h>
1.1 deraadt 58: #include <stdio.h>
59: #include <stdlib.h>
60: #include <string.h>
61: #include <struct.h>
1.2 deraadt 62: #include <tzfile.h>
1.1 deraadt 63: #include <unistd.h>
64: #include <utmp.h>
65: #include "pathnames.h"
66:
67: time_t expand __P((u_int));
68: char *flagbits __P((int));
69: char *getdev __P((dev_t));
70: int requested __P((char *[], struct acct *));
71: void usage __P((void));
72: char *user_from_uid();
73:
74: int
75: main(argc, argv)
76: int argc;
77: char *argv[];
78: {
79: register char *p;
80: struct acct ab;
81: struct stat sb;
82: FILE *fp;
83: off_t size;
84: time_t t;
1.2 deraadt 85: double delta;
1.1 deraadt 86: int ch;
87: char *acctfile;
88:
89: acctfile = _PATH_ACCT;
90: while ((ch = getopt(argc, argv, "f:")) != EOF)
91: switch((char)ch) {
92: case 'f':
93: acctfile = optarg;
94: break;
95: case '?':
96: default:
97: usage();
98: }
99: argc -= optind;
100: argv += optind;
101:
102: /* Open the file. */
103: if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb))
104: err(1, "%s", acctfile);
105:
106: /*
107: * Round off to integral number of accounting records, probably
108: * not necessary, but it doesn't hurt.
109: */
110: size = sb.st_size - sb.st_size % sizeof(struct acct);
111:
112: /* Check if any records to display. */
113: if (size < sizeof(struct acct))
114: exit(0);
115:
116: /*
117: * Seek to before the last entry in the file; use lseek(2) in case
118: * the file is bigger than a "long".
119: */
120: size -= sizeof(struct acct);
121: if (lseek(fileno(fp), size, SEEK_SET) == -1)
122: err(1, "%s", acctfile);
123:
124: for (;;) {
125: if (fread(&ab, sizeof(struct acct), 1, fp) != 1)
126: err(1, "%s", acctfile);
127:
128: if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1)
129: err(1, "%s", acctfile);
130:
131: if (size == 0)
132: break;
133: size -= sizeof(struct acct);
134:
135: if (ab.ac_comm[0] == '\0') {
136: ab.ac_comm[0] = '?';
137: ab.ac_comm[1] = '\0';
138: } else
139: for (p = &ab.ac_comm[0];
140: p < &ab.ac_comm[fldsiz(acct, ac_comm)] && *p; ++p)
141: if (!isprint(*p))
142: *p = '?';
143: if (*argv && !requested(argv, &ab))
144: continue;
145:
146: t = expand(ab.ac_utime) + expand(ab.ac_stime);
1.2 deraadt 147: (void)printf("%-*.*s %-7s %-*.*s %-*.*s %6.2f secs %.16s",
1.1 deraadt 148: fldsiz(acct, ac_comm), fldsiz(acct, ac_comm), ab.ac_comm,
149: flagbits(ab.ac_flag), UT_NAMESIZE, UT_NAMESIZE,
150: user_from_uid(ab.ac_uid, 0), UT_LINESIZE, UT_LINESIZE,
151: getdev(ab.ac_tty), t / (double)AHZ, ctime(&ab.ac_btime));
1.2 deraadt 152: delta = expand(ab.ac_etime) / (double)AHZ;
153: printf(" (%1.0lf:%02.0lf:%05.2lf)\n",
154: delta / SECSPERHOUR,
155: fmod(delta, SECSPERHOUR) / SECSPERMIN,
156: fmod(delta, SECSPERMIN));
1.1 deraadt 157: }
158: exit(0);
159: }
160:
161: time_t
162: expand(t)
163: u_int t;
164: {
165: register time_t nt;
166:
167: nt = t & 017777;
168: t >>= 13;
169: while (t) {
170: t--;
171: nt <<= 3;
172: }
173: return (nt);
174: }
175:
176: char *
177: flagbits(f)
178: register int f;
179: {
180: static char flags[20] = "-";
181: char *p;
182:
183: #define BIT(flag, ch) if (f & flag) *p++ = ch
184:
185: p = flags + 1;
186: BIT(ASU, 'S');
187: BIT(AFORK, 'F');
188: BIT(ACOMPAT, 'C');
189: BIT(ACORE, 'D');
190: BIT(AXSIG, 'X');
191: *p = '\0';
192: return (flags);
193: }
194:
195: int
196: requested(argv, acp)
197: register char *argv[];
198: register struct acct *acp;
199: {
200: do {
201: if (!strcmp(user_from_uid(acp->ac_uid, 0), *argv))
202: return (1);
203: if (!strcmp(getdev(acp->ac_tty), *argv))
204: return (1);
205: if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm)))
206: return (1);
207: } while (*++argv);
208: return (0);
209: }
210:
211: char *
212: getdev(dev)
213: dev_t dev;
214: {
215: static dev_t lastdev = (dev_t)-1;
216: static char *lastname;
217:
218: if (dev == NODEV) /* Special case. */
219: return ("__");
220: if (dev == lastdev) /* One-element cache. */
221: return (lastname);
222: lastdev = dev;
223: if ((lastname = devname(dev, S_IFCHR)) == NULL)
224: lastname = "??";
225: return (lastname);
226: }
227:
228: void
229: usage()
230: {
231: (void)fprintf(stderr,
232: "lastcomm [ -f file ] [command ...] [user ...] [tty ...]\n");
233: exit(1);
234: }
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