1/* vi: set sw=4 ts=4: */
2/*
3 * public domain -- Dave 'Kill a Cop' Cinege <dcinege@psychosis.com>
4 *
5 * dutmp
6 * Takes utmp formated file on stdin and dumps it's contents
7 * out in colon delimited fields. Easy to 'cut' for shell based
8 * versions of 'who', 'last', etc. IP Addr is output in hex,
9 * little endian on x86.
10 *
11 * Modified to support all sorts of libcs by
12 * Erik Andersen <andersen@lineo.com>
13 */
14
15#include <sys/types.h>
16#include <fcntl.h>
17
18#include <errno.h>
19#include <utmp.h>
20#include <stdlib.h>
21#include <unistd.h>
22#include "busybox.h"
23
24extern int dutmp_main(int argc, char **argv)
25{
26
27	int file;
28	struct utmp ut;
29
30	if (argc<2) {
31		file = fileno(stdin);
32	} else if (*argv[1] == '-' ) {
33		show_usage();
34	} else  {
35		file = open(argv[1], O_RDONLY);
36		if (file < 0) {
37			perror_msg_and_die(io_error, argv[1]);
38		}
39	}
40
41/* Kludge around the fact that the binary format for utmp has changed. */
42#if __GNU_LIBRARY__ < 5 || defined __UCLIBC__
43	/* Linux libc5 */
44	while (read(file, (void*)&ut, sizeof(struct utmp))) {
45		printf("%d|%d|%s|%s|%s|%s|%s|%lx\n",
46				ut.ut_type, ut.ut_pid, ut.ut_line,
47				ut.ut_id, ut.ut_user, ut.ut_host,
48				ctime(&(ut.ut_time)),
49				(long)ut.ut_addr);
50	}
51#else
52	/* Glibc, uClibc, etc. */
53	while (read(file, (void*)&ut, sizeof(struct utmp))) {
54		printf("%d|%d|%s|%s|%s|%s|%d|%d|%ld|%ld|%ld|%x\n",
55		ut.ut_type, ut.ut_pid, ut.ut_line,
56		ut.ut_id, ut.ut_user,	ut.ut_host,
57		ut.ut_exit.e_termination, ut.ut_exit.e_exit,
58		ut.ut_session,
59		ut.ut_tv.tv_sec, ut.ut_tv.tv_usec,
60		ut.ut_addr);
61	}
62#endif
63	return EXIT_SUCCESS;
64}
65