dutmp.c

一个通讯程序源码

/* CHK=0xD757 */
char *revision = "1.2";
/*+-----------------------------------------------------------------------
	dutmp.c -- dump /etc/utmp
	[e-mail]
------------------------------------------------------------------------*/
/*+:EDITS:*/
/*:09-10-1992-13:58-wht@n4hgf-ECU release 3.20 */
/*:08-22-1992-15:38-wht@n4hgf-ECU release 3.20 BETA */
/*:04-28-1992-13:05-wht@n4hgf-clean up for inclusion in ecu */
/*:11-19-1989-16:34-wht-creation */

#include <stdio.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/types.h>
#include <utmp.h>

char *utmp_file = "/etc/utmp";

extern char	*ctime();

/*+-------------------------------------------------------------------------
	main(argc,argv)
--------------------------------------------------------------------------*/
main(argc,argv)
int argc;
char **argv;
{
	struct utmp ut;
	register int ufd;

	printf("dutmp %s\n",revision);

	if((ufd = open(utmp_file,O_RDONLY,755)) < 0)
	{
		perror(utmp_file);
		exit(1);
	}

	while(read(ufd,&ut,sizeof(ut)) > 0)
	{
#if defined(sun)
		if(!*ut.ut_name || (ut.ut_time < 0))
			continue;
		printf("%-10.10s %-14.14s %-15.15s %s",
		    ut.ut_name,
		    ut.ut_line,
		    ut.ut_host,
		    ctime(&ut.ut_time));
#else
		printf("%-10.10s %-7.7s %-14.14s %6u %s",
		    ut.ut_user,
		    ut.ut_id,
		    ut.ut_line,
		    ut.ut_pid,
		    ctime(&ut.ut_time));
#endif
	}
	close(ufd);
	exit(0);
}	/* end of main */


/* vi: set tabstop=4 shiftwidth=4: */
/* end of dutmp.c */