/*    xlocal.c 
      it reads a message from stdin, adds X-Envelope-To: <recepient> header
      into the message header and pass it to <mailer> with arguments [args] 
*/

#include <stdio.h>
#include <string.h>

char line[1024];
int p[2], status, i;
char *args[30];

int main(int argc, char **argv)
{  
  if(argc<2) {
    fputs("Usage : xlocal <recepient> <mailer> [args]\n", stderr);
    return 1;
  }
  
  if(pipe(p) != 0) {
    fputs("pipe() failed", stderr);
    return 1;
  }
  
  switch(fork()) {
  case -1:
    fputs("fork() failed", stderr);
    return 1;
    break;
  case  0:
    close(0);
    dup(p[0]);
    close(p[1]);
    args[0] = argv[0];
    for(i=3; i < argc; i++)
      args[i-2] = argv[i];
    args[i] = NULL;
    execvp(argv[2], args);
    break;
  default:
    close(1);
    dup(p[1]);
    close(p[0]);
  }
  
  while(gets(line) != NULL) {
    if(line[0] == 0)
      break;
    puts(line);     
  }

  printf("X-Envelope-To: %s\n\n", argv[1]);

  while(gets(line) != NULL)
    puts(line);  
  
  sleep(1);
  return 0;
}