newversion.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <strings.h>
#include <sys/types.h>

int main(int argc, char **argv) {
  int i;
  unsigned int outputFD;
  FILE *outputFile;
  FILE *inputStream;

  for(i = 0; i < argc; i++) {
    if(!strcmp(argv[i], "--hotswapping")) {
      int reader = atoi(argv[++i]);
      inputStream = fdopen(reader, "r");
    }
  }

  fscanf(inputStream, "%d", &i);
  fscanf(inputStream, "%u", &outputFD);
  fclose(inputStream);
  outputFile = fdopen(outputFD, "w");

  for(;;i++) {
    printf("New Binary:\t%d My PID=%d\n", i, getpid());
    fflush(stdout);

    fprintf(outputFile, "New Binary:\t%d My PID=%d\n", i, getpid());
    fflush(outputFile);

    sleep(1);
  }
  return 0;
}