changes for local info, parity, vadic auto dialers

[unix-history] / usr / src / usr.bin / tip / hunt.c

/*      hunt.c  4.6     83/06/15        */
#include "tip.h"
#include <sys/stat.h>

#define RD      04
#define EX      01

static char *sccsid = "@(#)hunt.c       4.6 %G%";
extern char *getremote();
extern char *rindex();

int deadfl;

dead()
{
       deadfl = 1;
}

hunt(name)
       char *name;
{
       register char *cp;
       char string[100];
       struct stat     statbuf;

       deadfl = 0;
       signal(SIGALRM, dead);
       while (cp = getremote(name)) {
               uucplock = rindex(cp, '/')+1;
               if(strncmp(uucplock,"ttyd",4) == 0){
                       /* reverse dialin line */
                       if((stat(cp,&statbuf) != 0) ||
                       ((statbuf.st_mode & EX) == 0))
                               continue;
                       sprintf(string,"/usr/lib/uucp/disable %s",uucplock);
                       if(system(string)) continue;
                       sleep(5); /* insure that phone line is dropped */
               }
               if (mlock(uucplock) < 0) {
                       delock(uucplock);
                       continue;
               }
               /*
                * Straight through call units, such as the BIZCOMP,
                * VADIC and the DF, must indicate they're hardwired in
                *  order to get an open file descriptor placed in FD.
                * Otherwise, as for a DN-11, the open will have to
                *  be done in the "open" routine.
                */
               if (!HW)
                       break;
               alarm(10);
               if ((FD = open(cp, 2)) >= 0){
                       alarm(0);
                       if (!deadfl) {
                               ioctl(FD, TIOCEXCL, 0);
                               ioctl(FD, TIOCHPCL, 0);
                               signal(SIGALRM, SIG_DFL);
                               return ((int)cp);
                       }
               }
               alarm(0);
               signal(SIGALRM, dead);
               delock(uucplock);
       }
       signal(SIGALRM, SIG_DFL);
       return (deadfl ? -1 : (int)cp);
}