UNIX 7th Ed. - /usr/src/cmd/uucp/imsg.c

   1: #include "uucp.h"
   2: 
   3: 
   4: char Msync[2] = "\020";
   5: /*******
   6:  *	imsg(msg, fn)
   7:  *	char *msg;
   8:  *	int fn;
   9:  *
  10:  *	imsg  -  this is the initial read message routine -
  11:  *	used before a protocol is agreed upon.
  12:  *
  13:  *	return codes:
  14:  *		EOF - no more messages
  15:  *		0 - message returned
  16:  */
  17: 
  18: imsg(msg, fn)
  19: char *msg;
  20: int fn;
  21: {
  22:     int ret;
  23:     DEBUG(7, "imsg %s>", "");
  24:     while ((ret = read(fn, msg, 1)) == 1) {
  25:         DEBUG(7, "%c", (*msg > 037) ? *msg : '-');
  26:         if (*msg == Msync[0])
  27:             break;
  28:     }
  29:     DEBUG(7, "%s\n", "<");
  30:     if (ret < 1)
  31:         return(EOF);
  32:     while (read(fn, msg, 1) == 1) {
  33:         DEBUG(7, "%c", (*msg > 037) ? *msg : '-');
  34:         if (*msg == '\n')
  35:             break;
  36:         if (*msg == '\0')
  37:             break;
  38:         msg++;
  39:     }
  40:     *msg = '\0';
  41:     return(0);
  42: }
  43: 
  44: 
  45: /***
  46:  *	omsg(type, msg, fn)
  47:  *	char type, *msg;
  48:  *	int fn;
  49:  *
  50:  *	omsg  -  this is the initial write message routine -
  51:  *	used before a protocol is agreed upon.
  52:  *
  53:  *	return code:  always 0
  54:  */
  55: 
  56: omsg(type, msg, fn)
  57: char *msg, type;
  58: int fn;
  59: {
  60:     char buf[BUFSIZ], *c;
  61: 
  62:     c = buf;
  63:     *c++ = Msync[0];
  64:     *c++ = type;
  65:     while (*msg)
  66:         *c++ = *msg++;
  67:     *c++ = '\0';
  68:     write(fn, buf, strlen(buf) + 1);
  69:     return(0);
  70: }

Defined functions

Defined variables