Annotation of src/usr.bin/lastcomm/lastcomm.c, Revision 1.25
1.25 ! bluhm 1: /* $OpenBSD: lastcomm.c,v 1.24 2017/03/11 18:33:21 guenther 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:
1.20 deraadt 33: #include <sys/param.h> /* NODEV */
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: case '?':
81: default:
82: usage();
83: }
84: argc -= optind;
85: argv += optind;
86:
87: /* Open the file. */
88: if ((fp = fopen(acctfile, "r")) == NULL || fstat(fileno(fp), &sb))
89: err(1, "%s", acctfile);
90:
91: /*
92: * Round off to integral number of accounting records, probably
93: * not necessary, but it doesn't hurt.
94: */
95: size = sb.st_size - sb.st_size % sizeof(struct acct);
96:
97: /* Check if any records to display. */
98: if (size < sizeof(struct acct))
99: exit(0);
100:
101: /*
102: * Seek to before the last entry in the file; use lseek(2) in case
103: * the file is bigger than a "long".
104: */
105: size -= sizeof(struct acct);
106: if (lseek(fileno(fp), size, SEEK_SET) == -1)
107: err(1, "%s", acctfile);
108:
109: for (;;) {
110: if (fread(&ab, sizeof(struct acct), 1, fp) != 1)
111: err(1, "%s", acctfile);
112:
113: if (ab.ac_comm[0] == '\0') {
114: ab.ac_comm[0] = '?';
115: ab.ac_comm[1] = '\0';
116: } else
117: for (p = &ab.ac_comm[0];
1.24 guenther 118: p < &ab.ac_comm[sizeof ab.ac_comm] && *p; ++p)
1.18 deraadt 119: if (!isprint((unsigned char)*p))
1.1 deraadt 120: *p = '?';
1.6 flipk 121: if (!*argv || requested(argv, &ab))
122: {
123: t = expand(ab.ac_utime) + expand(ab.ac_stime);
124: (void)printf("%-*.*s %-7s %-*.*s %-*.*s %6.2f secs %.16s",
1.24 guenther 125: (int)sizeof ab.ac_comm,
126: (int)sizeof ab.ac_comm,
1.7 deraadt 127: ab.ac_comm, flagbits(ab.ac_flag), UT_NAMESIZE,
128: UT_NAMESIZE, user_from_uid(ab.ac_uid, 0),
129: UT_LINESIZE, UT_LINESIZE, getdev(ab.ac_tty),
130: t / (double)AHZ, ctime(&ab.ac_btime));
1.6 flipk 131: delta = expand(ab.ac_etime) / (double)AHZ;
1.8 pvalchev 132: printf(" (%1.0f:%02.0f:%05.2f)\n",
1.7 deraadt 133: delta / SECSPERHOUR,
1.14 deraadt 134: fmod(delta, (double)SECSPERHOUR) / SECSPERMIN,
135: fmod(delta, (double)SECSPERMIN));
1.6 flipk 136: }
1.5 flipk 137:
138: if (size == 0)
139: break;
1.6 flipk 140: /* seek to previous entry */
141: if (fseek(fp, 2 * -(long)sizeof(struct acct), SEEK_CUR) == -1)
142: err(1, "%s", acctfile);
143: size -= sizeof(struct acct);
1.1 deraadt 144: }
145: exit(0);
146: }
147:
148: time_t
1.12 deraadt 149: expand(u_int t)
1.1 deraadt 150: {
1.9 mpech 151: time_t nt;
1.1 deraadt 152:
153: nt = t & 017777;
154: t >>= 13;
155: while (t) {
156: t--;
157: nt <<= 3;
158: }
159: return (nt);
160: }
161:
162: char *
1.12 deraadt 163: flagbits(int f)
1.1 deraadt 164: {
165: static char flags[20] = "-";
166: char *p;
167:
168: #define BIT(flag, ch) if (f & flag) *p++ = ch
169:
170: p = flags + 1;
171: BIT(ASU, 'S');
172: BIT(AFORK, 'F');
173: BIT(ACOMPAT, 'C');
174: BIT(ACORE, 'D');
175: BIT(AXSIG, 'X');
1.25 ! bluhm 176: BIT(APLEDGE, 'P');
1.1 deraadt 177: *p = '\0';
178: return (flags);
179: }
180:
181: int
1.12 deraadt 182: requested(char *argv[], struct acct *acp)
1.1 deraadt 183: {
184: do {
185: if (!strcmp(user_from_uid(acp->ac_uid, 0), *argv))
186: return (1);
187: if (!strcmp(getdev(acp->ac_tty), *argv))
188: return (1);
1.24 guenther 189: if (!strncmp(acp->ac_comm, *argv, sizeof acp->ac_comm))
1.1 deraadt 190: return (1);
191: } while (*++argv);
192: return (0);
193: }
194:
195: char *
1.12 deraadt 196: getdev(dev_t dev)
1.1 deraadt 197: {
198: static dev_t lastdev = (dev_t)-1;
199: static char *lastname;
200:
201: if (dev == NODEV) /* Special case. */
202: return ("__");
203: if (dev == lastdev) /* One-element cache. */
204: return (lastname);
205: lastdev = dev;
206: if ((lastname = devname(dev, S_IFCHR)) == NULL)
207: lastname = "??";
208: return (lastname);
209: }
210:
211: void
1.12 deraadt 212: usage(void)
1.1 deraadt 213: {
214: (void)fprintf(stderr,
1.16 jmc 215: "usage: lastcomm [-f file] [command ...] [user ...] [terminal ...]\n");
1.1 deraadt 216: exit(1);
217: }
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