BSD 4_3_Net_2 release

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

/*
* Copyright (c) 1983 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1983 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)rwho.c      5.5 (Berkeley) 6/1/90";
#endif /* not lint */

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

DIR     *dirp;

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

#define WHDRSIZE        (sizeof (wd) - sizeof (wd.wd_we))
/* 
* this macro should be shared with ruptime.
*/
#define down(w,now)     ((now) - (w)->wd_recvtime > 11 * 60)

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

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

       while ((ch = getopt(argc, argv, "a")) != EOF)
               switch((char)ch) {
               case 'a':
                       aflg = 1;
                       break;
               case '?':
               default:
                       fprintf(stderr, "usage: rwho [-a]\n");
                       exit(1);
               }
       if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) {
               perror(_PATH_RWHODIR);
               exit(1);
       }
       mp = myutmp;
       (void)time(&now);
       while (dp = readdir(dirp)) {
               if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
                       continue;
               f = open(dp->d_name, O_RDONLY);
               if (f < 0)
                       continue;
               cc = read(f, (char *)&wd, sizeof (struct whod));
               if (cc < WHDRSIZE) {
                       (void) close(f);
                       continue;
               }
               if (down(w,now)) {
                       (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.out_line);
               if (j > width)
                       width = j;
               mp++;
       }
       mp = myutmp;
       for (i = 0; i < nusers; i++) {
               char buf[BUFSIZ];
               (void)sprintf(buf, "%s:%s", mp->myhost, mp->myutmp.out_line);
               printf("%-8.8s %-*s %.12s",
                  mp->myutmp.out_name,
                  width,
                  buf,
                  ctime((time_t *)&mp->myutmp.out_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.out_name, u2->myutmp.out_name, 8);
       if (rc)
               return (rc);
       rc = strncmp(u1->myhost, u2->myhost, 8);
       if (rc)
               return (rc);
       return (strncmp(u1->myutmp.out_line, u2->myutmp.out_line, 8));
}