directory not part of protocol, so moved out of rwhod.h

[unix-history] / usr / src / usr.bin / rwho / rwho.c

#ifndef lint
static char sccsid[] = "@(#)rwho.c      4.5 83/05/05";
#endif

#include <sys/param.h>
#include <stdio.h>
#include <dir.h>
#include <utmp.h>
#include <rwhod.h>

DIR     *etc;

struct  whod wd;
int     utmpcmp();
#define NUSERS  1000
struct  myutmp {
       char    myhost[32];
       int     myidle;
       struct  utmp myutmp;
} myutmp[NUSERS];
int     nusers;

#define WHDRSIZE        (sizeof (wd) - sizeof (wd.wd_we))
#define RWHODIR         "/usr/spool/rwho"

char    *ctime(), *strcpy();
int     now;
int     aflg;

main(argc, argv)
       int argc;
       char **argv;
{
       struct direct *dp;
       int cc, width;
       register struct whod *w = &wd;
       register struct whoent *we;
       register struct myutmp *mp;
       int f, n, i;

       argc--, argv++;
again:
       if (argc > 0 && !strcmp(argv[0], "-a")) {
               argc--, argv++;
               aflg++;
               goto again;
       }
       (void) time(&now);
       if (chdir(RWHODIR) < 0) {
               perror(RWHODIR);
               exit(1);
       }
       etc = opendir(".");
       if (etc == NULL) {
               perror("/etc");
               exit(1);
       }
       mp = myutmp;
       while (dp = readdir(etc)) {
               if (dp->d_ino == 0)
                       continue;
               if (strncmp(dp->d_name, "whod.", 5))
                       continue;
               f = open(dp->d_name, 0);
               if (f < 0)
                       continue;
               cc = read(f, (char *)&wd, sizeof (struct whod));
               if (cc < WHDRSIZE) {
                       (void) close(f);
                       continue;
               }
               if (now - w->wd_recvtime > 5 * 60) {
                       (void) close(f);
                       continue;
               }
               cc -= WHDRSIZE;
               we = w->wd_we;
               for (n = cc / sizeof (struct whoent); n > 0; n--) {
                       if (aflg == 0 && we->we_idle >= 60*60) {
                               we++;
                               continue;
                       }
                       if (nusers >= NUSERS) {
                               printf("too many users\n");
                               exit(1);
                       }
                       mp->myutmp = we->we_utmp; mp->myidle = we->we_idle;
                       (void) strcpy(mp->myhost, w->wd_hostname);
                       nusers++; we++; mp++;
               }
               (void) close(f);
       }
       qsort((char *)myutmp, nusers, sizeof (struct myutmp), utmpcmp);
       mp = myutmp;
       width = 0;
       for (i = 0; i < nusers; i++) {
               int j = strlen(mp->myhost) + 1 + strlen(mp->myutmp.ut_line);
               if (j > width)
                       width = j;
               mp++;
       }
       mp = myutmp;
       for (i = 0; i < nusers; i++) {
               char buf[22];
               sprintf(buf, "%s:%s", mp->myhost, mp->myutmp.ut_line);
               printf("%-8.8s %-*s %.12s",
                  mp->myutmp.ut_name,
                  width,
                  buf,
                  ctime((time_t *)&mp->myutmp.ut_time)+4);
               mp->myidle /= 60;
               if (mp->myidle) {
                       if (aflg) {
                               if (mp->myidle >= 100*60)
                                       mp->myidle = 100*60 - 1;
                               if (mp->myidle >= 60)
                                       printf(" %2d", mp->myidle / 60);
                               else
                                       printf("   ");
                       } else
                               printf(" ");
                       printf(":%02d", mp->myidle % 60);
               }
               printf("\n");
               mp++;
       }
       exit(0);
}

utmpcmp(u1, u2)
       struct myutmp *u1, *u2;
{
       int rc;

       rc = strncmp(u1->myutmp.ut_name, u2->myutmp.ut_name, 8);
       if (rc)
               return (rc);
       rc = strncmp(u1->myhost, u2->myhost, 8);
       if (rc)
               return (rc);
       return (strncmp(u1->myutmp.ut_line, u2->myutmp.ut_line, 8));
}