xref: /titanic_44/usr/src/cmd/lastcomm/lc_pacct.c (revision 2b24ab6b3865caeede9eeb9db6b83e1d89dcd1ea)
1 /*
2  * Copyright (c) 1980 Regents of the University of California.
3  * All rights reserved. The Berkeley software License Agreement
4  * specifies the terms and conditions for redistribution.
5  *
6  * Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
7  * All rights reserved.
8  *
9  *
10  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
11  * Use is subject to license terms.
12  */
13 
14 #pragma ident	"%Z%%M%	%I%	%E% SMI"
15 
16 #include "lastcomm.h"
17 
18 /*
19  * lc_pacct() provides the functionality of lastcomm when applied to the basic
20  * SVR4 accounting file, /var/adm/pacct.  Definitions for this accounting file
21  * format are given in <sys/acct.h>.
22  */
23 
24 extern ulong_t expand(comp_t);
25 
26 static int
27 ok(int argc, char *argv[], int index, struct acct *acp)
28 {
29 	int j;
30 
31 	for (j = index; j < argc; j++)
32 		if (strcmp(getname(acp->ac_uid), argv[j]) &&
33 		    strcmp(getdev(acp->ac_tty), argv[j]) &&
34 		    strncmp(acp->ac_comm, argv[j], fldsiz(acct, ac_comm)))
35 			break;
36 	return (j == argc);
37 }
38 
39 int
40 lc_pacct(char *name, int argc, char *argv[], int index)
41 {
42 	struct acct buf[NACCT];
43 	int bn, cc;
44 	struct acct *acp;
45 	struct stat sb;
46 	time_t t;
47 	int fd;
48 
49 	if ((fd = open(name, O_RDONLY)) < 0) {
50 		perror(name);
51 		return (1);
52 	}
53 
54 	(void) fstat(fd, &sb);
55 
56 	if (sb.st_size % sizeof (struct acct)) {
57 		(void) fprintf(stderr, gettext("lastcomm: accounting file"
58 		    " is corrupted\n"));
59 		return (1);
60 	}
61 
62 	for (bn = ((unsigned)sb.st_size / BUF_SIZ) + 1; bn >= 0; bn--) {
63 		if (lseek(fd, (unsigned)bn * BUF_SIZ, 0) == -1) {
64 			perror("lseek");
65 			return (1);
66 		}
67 		cc = read(fd, buf, BUF_SIZ);
68 		if (cc < 0) {
69 			perror("read");
70 			return (1);
71 		}
72 		acp = buf + (cc / sizeof (buf[0])) - 1;
73 		for (; acp >= buf; acp--) {
74 			char *cp;
75 			ulong_t x;
76 
77 			if (acp->ac_flag > 0100) {
78 				(void) fprintf(stderr, gettext("lastcomm: "
79 				    "accounting file is corrupted\n"));
80 				return (1);
81 			}
82 			if (acp->ac_comm[0] == '\0')
83 				(void) strcpy(acp->ac_comm, "?");
84 			for (cp = &acp->ac_comm[0];
85 			    cp < &acp->ac_comm[fldsiz(acct, ac_comm)] && *cp;
86 			    cp++)
87 				if (!isascii(*cp) || iscntrl(*cp))
88 					*cp = '?';
89 			if (argc > index && !ok(argc, argv, index, acp))
90 				continue;
91 			x = expand(acp->ac_utime) + expand(acp->ac_stime);
92 			t = acp->ac_btime;
93 			(void) printf("%-*.*s %s %-*s %-*s %6.2f secs %.16s\n",
94 			    fldsiz(acct, ac_comm), fldsiz(acct, ac_comm),
95 			    acp->ac_comm,
96 			    flagbits(acp->ac_flag),
97 			    NMAX, getname(acp->ac_uid),
98 			    LMAX, getdev(acp->ac_tty),
99 			    x / (double)HZ, ctime(&t));
100 		}
101 	}
102 	return (0);
103 }
104