BSD 3 development

[unix-history] / usr / src / cmd / uucp / imsg.c

#include "uucp.h"


char Msync[2] = "\020";
/*******
*      imsg(msg, fn)
*      char *msg;
*      int fn;
*
*      imsg  -  this is the initial read message routine -
*      used before a protocol is agreed upon.
*
*      return codes:
*              EOF - no more messages
*              0 - message returned
*/

imsg(msg, fn)
char *msg;
int fn;
{
       int ret;
       DEBUG(7, "imsg %s>", "");
       while ((ret = read(fn, msg, 1)) == 1) {
               DEBUG(7, "%c", (*msg > 037) ? *msg : '-');
               if (*msg == Msync[0])
                       break;
       }
       DEBUG(7, "%s\n", "<");
       if (ret < 1)
               return(EOF);
       while (read(fn, msg, 1) == 1) {
               DEBUG(7, "%c", (*msg > 037) ? *msg : '-');
               if (*msg == '\n')
                       break;
               if (*msg == '\0')
                       break;
               msg++;
       }
       *msg = '\0';
       return(0);
}


/***
*      omsg(type, msg, fn)
*      char type, *msg;
*      int fn;
*
*      omsg  -  this is the initial write message routine -
*      used before a protocol is agreed upon.
*
*      return code:  always 0
*/

omsg(type, msg, fn)
char *msg, type;
int fn;
{
       char buf[BUFSIZ], *c;

       c = buf;
       *c++ = Msync[0];
       *c++ = type;
       while (*msg)
               *c++ = *msg++;
       *c++ = '\0';
       write(fn, buf, strlen(buf) + 1);
       return(0);
}