Annotation of src/usr.bin/lastcomm/lastcomm.c, Revision 1.1.1.1
1.1 deraadt 1: /* $NetBSD: lastcomm.c,v 1.7.2.1 1995/10/12 06:55:13 jtc 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: #ifndef lint
37: static char copyright[] =
38: "@(#) 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: static char rcsid[] = "$NetBSD: lastcomm.c,v 1.7.2.1 1995/10/12 06:55:13 jtc 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 <stdio.h>
57: #include <stdlib.h>
58: #include <string.h>
59: #include <struct.h>
60: #include <unistd.h>
61: #include <utmp.h>
62: #include "pathnames.h"
63:
64: time_t expand __P((u_int));
65: char *flagbits __P((int));
66: char *getdev __P((dev_t));
67: int requested __P((char *[], struct acct *));
68: void usage __P((void));
69: char *user_from_uid();
70:
71: int
72: main(argc, argv)
73: int argc;
74: char *argv[];
75: {
76: register char *p;
77: struct acct ab;
78: struct stat sb;
79: FILE *fp;
80: off_t size;
81: time_t t;
82: int ch;
83: char *acctfile;
84:
85: acctfile = _PATH_ACCT;
86: while ((ch = getopt(argc, argv, "f:")) != EOF)
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 (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1)
125: err(1, "%s", acctfile);
126:
127: if (size == 0)
128: break;
129: size -= sizeof(struct acct);
130:
131: if (ab.ac_comm[0] == '\0') {
132: ab.ac_comm[0] = '?';
133: ab.ac_comm[1] = '\0';
134: } else
135: for (p = &ab.ac_comm[0];
136: p < &ab.ac_comm[fldsiz(acct, ac_comm)] && *p; ++p)
137: if (!isprint(*p))
138: *p = '?';
139: if (*argv && !requested(argv, &ab))
140: continue;
141:
142: t = expand(ab.ac_utime) + expand(ab.ac_stime);
143: (void)printf("%-*.*s %-7s %-*.*s %-*.*s %6.2f secs %.16s\n",
144: fldsiz(acct, ac_comm), fldsiz(acct, ac_comm), ab.ac_comm,
145: flagbits(ab.ac_flag), UT_NAMESIZE, UT_NAMESIZE,
146: user_from_uid(ab.ac_uid, 0), UT_LINESIZE, UT_LINESIZE,
147: getdev(ab.ac_tty), t / (double)AHZ, ctime(&ab.ac_btime));
148: }
149: exit(0);
150: }
151:
152: time_t
153: expand(t)
154: u_int t;
155: {
156: register time_t nt;
157:
158: nt = t & 017777;
159: t >>= 13;
160: while (t) {
161: t--;
162: nt <<= 3;
163: }
164: return (nt);
165: }
166:
167: char *
168: flagbits(f)
169: register int f;
170: {
171: static char flags[20] = "-";
172: char *p;
173:
174: #define BIT(flag, ch) if (f & flag) *p++ = ch
175:
176: p = flags + 1;
177: BIT(ASU, 'S');
178: BIT(AFORK, 'F');
179: BIT(ACOMPAT, 'C');
180: BIT(ACORE, 'D');
181: BIT(AXSIG, 'X');
182: *p = '\0';
183: return (flags);
184: }
185:
186: int
187: requested(argv, acp)
188: register char *argv[];
189: register struct acct *acp;
190: {
191: do {
192: if (!strcmp(user_from_uid(acp->ac_uid, 0), *argv))
193: return (1);
194: if (!strcmp(getdev(acp->ac_tty), *argv))
195: return (1);
196: if (!strncmp(acp->ac_comm, *argv, fldsiz(acct, ac_comm)))
197: return (1);
198: } while (*++argv);
199: return (0);
200: }
201:
202: char *
203: getdev(dev)
204: dev_t dev;
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
220: usage()
221: {
222: (void)fprintf(stderr,
223: "lastcomm [ -f file ] [command ...] [user ...] [tty ...]\n");
224: exit(1);
225: }
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