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/* vi: set sw=4 ts=4: */
/*----------------------------------------------------------------------
* Mini who is used to display user name, login time,
* idle time and host name.
*
* Author: Da Chen <dchen@ayrnetworks.com>
*
* This is a free document; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation:
* http://www.gnu.org/copyleft/gpl.html
*
* Copyright (c) 2002 AYR Networks, Inc.
*----------------------------------------------------------------------
*/
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <utmp.h>
#include <sys/stat.h>
#include <errno.h>
#include <string.h>
#include <time.h>
#include "busybox.h"
int who_main(int argc, char **argv)
{
struct utmp *ut;
struct stat st;
int devlen, len;
time_t now, idle;
if (argc > 1)
bb_show_usage();
setutent();
devlen = sizeof("/dev/") - 1;
printf("USER TTY IDLE FROM HOST\n");
while ((ut = getutent()) != NULL) {
char name[40];
if (ut->ut_user[0] && ut->ut_type == USER_PROCESS) {
len = strlen(ut->ut_line);
if (ut->ut_line[0] == '/') {
strncpy(name, ut->ut_line, len);
name[len] = '\0';
strcpy(ut->ut_line, ut->ut_line + devlen);
} else {
strcpy(name, "/dev/");
strncpy(name+devlen, ut->ut_line, len);
name[devlen+len] = '\0';
}
printf("%-10s %-8s ", ut->ut_user, ut->ut_line);
if (stat(name, &st) == 0) {
now = time(NULL);
idle = now - st.st_atime;
if (idle < 60)
printf("00:00m ");
else if (idle < (60 * 60))
printf("00:%02dm ", (int)(idle / 60));
else if (idle < (24 * 60 * 60))
printf("%02d:%02dm ", (int)(idle / (60 * 60)),
(int)(idle % (60 * 60)) / 60);
else if (idle < (24 * 60 * 60 * 365))
printf("%03ddays ", (int)(idle / (24 * 60 * 60)));
else
printf("%02dyears ", (int) (idle / (24 * 60 * 60 * 365)));
} else
printf("%-8s ", "?");
printf("%-12.12s %s\n", ctime((time_t*)&(ut->ut_tv.tv_sec)) + 4, ut->ut_host);
}
}
endutent();
return 0;
}
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