72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
/* who 1.5 - tell who is currently logged in Author: Kees J. Bot
|
|
* 9 Jul 1989
|
|
*/
|
|
#define nil 0
|
|
#include <sys/types.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/stat.h>
|
|
#include <utmp.h>
|
|
#include <time.h>
|
|
#include <string.h>
|
|
#include <minix/paths.h>
|
|
|
|
char PATH_UTMP[] = _PATH_UTMP;
|
|
|
|
char day[] = "SunMonTueWedThuFriSat";
|
|
char month[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
char *tmp= PATH_UTMP;
|
|
FILE *f;
|
|
struct utmp ut;
|
|
struct tm *tm;
|
|
int slot, wtmp= 0, once= 0;
|
|
|
|
if (argc > 3) {
|
|
fprintf(stderr, "Usage: who <account-file> | who am i\n");
|
|
exit(1);
|
|
}
|
|
if (argc == 2) {
|
|
tmp= argv[1];
|
|
wtmp= 1;
|
|
}
|
|
|
|
if ((f= fopen(tmp, "r")) == nil) {
|
|
fprintf(stderr, "who: can't open %s\n", tmp);
|
|
exit(1);
|
|
}
|
|
if (argc == 3) {
|
|
if ((slot= ttyslot()) < 0) {
|
|
fprintf(stderr, "who: no access to terminal.\n");
|
|
exit(1);
|
|
}
|
|
fseek(f, (off_t) sizeof(ut) * slot, 0);
|
|
once= 1;
|
|
}
|
|
|
|
while (fread((char *) &ut, sizeof(ut), 1, f) == 1) {
|
|
if (!wtmp && ut.ut_name[0] == 0) continue;
|
|
|
|
tm= localtime(&ut.ut_time);
|
|
|
|
printf("%-9.8s %-9.8s %.3s %.3s %2d %02d:%02d",
|
|
ut.ut_name,
|
|
ut.ut_line,
|
|
day + (3 * tm->tm_wday),
|
|
month + (3 * tm->tm_mon),
|
|
tm->tm_mday,
|
|
tm->tm_hour,
|
|
tm->tm_min
|
|
);
|
|
|
|
if (ut.ut_host[0] != 0) printf(" (%.*s)",
|
|
(int) sizeof(ut.ut_host), ut.ut_host);
|
|
|
|
printf("\n");
|
|
if (once) break;
|
|
}
|
|
exit(0);
|
|
}
|