last few day's work

[unix-history] / usr / src / usr.bin / window / wwiomux.c

#ifndef lint
static  char *sccsid = "@(#)wwiomux.c   3.1 83/08/11";
#endif

#include "ww.h"

wwforce(imask)
register int *imask;
{
       register struct ww **w;
       char buf[512];
       register int n;

       for (w = wwindex; w < &wwindex[NWW]; w++)
               if (*w && (*w)->ww_haspty && (*w)->ww_pty >= 0)
                       *imask |= 1 << (*w)->ww_pty;
       n = select(wwdtablesize, imask, (int *)0, (int *)0,
               (struct timeval *)0);
       if (n <= 0)
               return -1;
       for (w = wwindex; w < &wwindex[NWW]; w++)
               if (*w && (*w)->ww_haspty && (*w)->ww_pty >= 0
                   && *imask & 1 << (*w)->ww_pty) {
                       n = read((*w)->ww_pty, buf, sizeof buf);
                       if (n > 0)
                               (void) wwwrite((*w), buf, n);
               }
       return 0;
}