Annotation of src/usr.bin/lastcomm/lastcomm.c, Revision 1.36
1.36 ! deraadt 1: /* $OpenBSD: lastcomm.c,v 1.35 2024/01/19 14:25:03 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:
1.30 deraadt 33: #include <sys/types.h>
1.1 deraadt 34: #include <sys/stat.h>
35: #include <sys/acct.h>
36:
37: #include <ctype.h>
38: #include <err.h>
39: #include <fcntl.h>
1.2 deraadt 40: #include <math.h>
1.1 deraadt 41: #include <stdio.h>
42: #include <stdlib.h>
43: #include <string.h>
44: #include <unistd.h>
45: #include <utmp.h>
1.13 deraadt 46: #include <pwd.h>
1.1 deraadt 47: #include "pathnames.h"
48:
1.10 millert 49: time_t expand(u_int);
50: char *flagbits(int);
51: char *getdev(dev_t);
52: int requested(char *[], struct acct *);
53: void usage(void);
1.21 millert 54:
55: #define SECSPERMIN (60)
56: #define SECSPERHOUR (60 * 60)
1.1 deraadt 57:
58: int
1.12 deraadt 59: main(int argc, char *argv[])
1.1 deraadt 60: {
1.9 mpech 61: char *p;
1.1 deraadt 62: struct acct ab;
63: struct stat sb;
64: FILE *fp;
65: off_t size;
66: time_t t;
1.2 deraadt 67: double delta;
1.1 deraadt 68: int ch;
69: char *acctfile;
1.22 deraadt 70:
1.23 deraadt 71: if (pledge("stdio rpath getpw", NULL) == -1)
72: err(1, "pledge");
1.1 deraadt 73:
74: acctfile = _PATH_ACCT;
1.4 millert 75: while ((ch = getopt(argc, argv, "f:")) != -1)
1.19 okan 76: switch(ch) {
1.1 deraadt 77: case 'f':
78: acctfile = optarg;
79: break;
80: default:
81: usage();
82: }
83: argc -= optind;
84: argv += optind;
85:
86: /* Open the file. */
87: if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb))
88: err(1, "%s", acctfile);
89:
90: /*
91: * Round off to integral number of accounting records, probably
92: * not necessary, but it doesn't hurt.
93: */
94: size = sb.st_size - sb.st_size % sizeof(struct acct);
95:
96: /* Check if any records to display. */
97: if (size < sizeof(struct acct))
98: exit(0);
99:
100: /*
101: * Seek to before the last entry in the file; use lseek(2) in case
102: * the file is bigger than a "long".
103: */
104: size -= sizeof(struct acct);
105: if (lseek(fileno(fp), size, SEEK_SET) == -1)
106: err(1, "%s", acctfile);
107:
108: for (;;) {
1.32 bluhm 109: char commpid[sizeof(ab.ac_comm) + 13];
110:
1.1 deraadt 111: if (fread(&ab, sizeof(struct acct), 1, fp) != 1)
112: err(1, "%s", acctfile);
113:
114: if (ab.ac_comm[0] == '\0') {
115: ab.ac_comm[0] = '?';
116: ab.ac_comm[1] = '\0';
117: } else
118: for (p = &ab.ac_comm[0];
1.24 guenther 119: p < &ab.ac_comm[sizeof ab.ac_comm] && *p; ++p)
1.18 deraadt 120: if (!isprint((unsigned char)*p))
1.1 deraadt 121: *p = '?';
1.32 bluhm 122: snprintf(commpid, sizeof(commpid), "%s[%d]",
123: ab.ac_comm, ab.ac_pid);
1.30 deraadt 124: if (!*argv || requested(argv, &ab)) {
1.6 flipk 125: t = expand(ab.ac_utime) + expand(ab.ac_stime);
126: (void)printf("%-*.*s %-7s %-*.*s %-*.*s %6.2f secs %.16s",
1.32 bluhm 127: (int)sizeof commpid,
128: (int)sizeof commpid,
129: commpid, flagbits(ab.ac_flag), UT_NAMESIZE,
1.7 deraadt 130: UT_NAMESIZE, user_from_uid(ab.ac_uid, 0),
131: UT_LINESIZE, UT_LINESIZE, getdev(ab.ac_tty),
132: t / (double)AHZ, ctime(&ab.ac_btime));
1.6 flipk 133: delta = expand(ab.ac_etime) / (double)AHZ;
1.8 pvalchev 134: printf(" (%1.0f:%02.0f:%05.2f)\n",
1.7 deraadt 135: delta / SECSPERHOUR,
1.14 deraadt 136: fmod(delta, (double)SECSPERHOUR) / SECSPERMIN,
137: fmod(delta, (double)SECSPERMIN));
1.6 flipk 138: }
1.5 flipk 139:
140: if (size == 0)
141: break;
1.6 flipk 142: /* seek to previous entry */
143: if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1)
144: err(1, "%s", acctfile);
145: size -= sizeof(struct acct);
1.1 deraadt 146: }
147: exit(0);
148: }
149:
150: time_t
1.12 deraadt 151: expand(u_int t)
1.1 deraadt 152: {
1.9 mpech 153: time_t nt;
1.1 deraadt 154:
155: nt = t & 017777;
156: t >>= 13;
157: while (t) {
158: t--;
159: nt <<= 3;
160: }
161: return (nt);
162: }
163:
164: char *
1.12 deraadt 165: flagbits(int f)
1.1 deraadt 166: {
167: static char flags[20] = "-";
168: char *p;
169:
170: #define BIT(flag, ch) if (f & flag) *p++ = ch
171:
172: p = flags + 1;
173: BIT(AFORK, 'F');
1.29 bluhm 174: BIT(AMAP, 'M');
1.1 deraadt 175: BIT(ACORE, 'D');
176: BIT(AXSIG, 'X');
1.25 bluhm 177: BIT(APLEDGE, 'P');
1.26 bluhm 178: BIT(ATRAP, 'T');
1.28 bluhm 179: BIT(AUNVEIL, 'U');
1.34 deraadt 180: BIT(APINSYS, 'S');
1.36 ! deraadt 181: BIT(ABTCFI, 'B');
1.1 deraadt 182: *p = '\0';
183: return (flags);
184: }
185:
186: int
1.12 deraadt 187: requested(char *argv[], struct acct *acp)
1.1 deraadt 188: {
189: do {
190: if (!strcmp(user_from_uid(acp->ac_uid, 0), *argv))
191: return (1);
192: if (!strcmp(getdev(acp->ac_tty), *argv))
193: return (1);
1.24 guenther 194: if (!strncmp(acp->ac_comm, *argv, sizeof acp->ac_comm))
1.1 deraadt 195: return (1);
196: } while (*++argv);
197: return (0);
198: }
199:
200: char *
1.12 deraadt 201: getdev(dev_t dev)
1.1 deraadt 202: {
203: static dev_t lastdev = (dev_t)-1;
204: static char *lastname;
205:
1.30 deraadt 206: if (dev == -1) /* Special case. */
1.1 deraadt 207: return ("__");
208: if (dev == lastdev) /* One-element cache. */
209: return (lastname);
210: lastdev = dev;
211: if ((lastname = devname(dev, S_IFCHR)) == NULL)
212: lastname = "??";
213: return (lastname);
214: }
215:
216: void
1.12 deraadt 217: usage(void)
1.1 deraadt 218: {
219: (void)fprintf(stderr,
1.16 jmc 220: "usage: lastcomm [-f file] [command ...] [user ...] [terminal ...]\n");
1.1 deraadt 221: exit(1);
222: }
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