Show dutmp.c syntax highlighted
/* vi: set sw=4 ts=4: */
/*
* public domain -- Dave 'Kill a Cop' Cinege <dcinege@psychosis.com>
*
* dutmp
* Takes utmp formated file on stdin and dumps it's contents
* out in colon delimited fields. Easy to 'cut' for shell based
* versions of 'who', 'last', etc. IP Addr is output in hex,
* little endian on x86.
*
* Modified to support all sorts of libcs by
* Erik Andersen <andersen@lineo.com>
*/
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <utmp.h>
#include <stdlib.h>
#include <unistd.h>
#include "busybox.h"
extern int dutmp_main(int argc, char **argv)
{
int file;
struct utmp ut;
if (argc<2) {
file = fileno(stdin);
} else if (*argv[1] == '-' ) {
show_usage();
} else {
file = open(argv[1], O_RDONLY);
if (file < 0) {
perror_msg_and_die(io_error, argv[1]);
}
}
/* Kludge around the fact that the binary format for utmp has changed. */
#if __GNU_LIBRARY__ < 5 || defined __UCLIBC__
/* Linux libc5 */
while (read(file, (void*)&ut, sizeof(struct utmp))) {
printf("%d|%d|%s|%s|%s|%s|%s|%lx\n",
ut.ut_type, ut.ut_pid, ut.ut_line,
ut.ut_id, ut.ut_user, ut.ut_host,
ctime(&(ut.ut_time)),
(long)ut.ut_addr);
}
#else
/* Glibc, uClibc, etc. */
while (read(file, (void*)&ut, sizeof(struct utmp))) {
printf("%d|%d|%s|%s|%s|%s|%d|%d|%ld|%ld|%ld|%x\n",
ut.ut_type, ut.ut_pid, ut.ut_line,
ut.ut_id, ut.ut_user, ut.ut_host,
ut.ut_exit.e_termination, ut.ut_exit.e_exit,
ut.ut_session,
ut.ut_tv.tv_sec, ut.ut_tv.tv_usec,
ut.ut_addr);
}
#endif
return EXIT_SUCCESS;
}
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