restart

restart.c

#define _DARWIN_BETTER_REALPATH
#include <dlfcn.h>
#include <limits.h>
#include <mach-o/dyld.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

int main(int argc, char** argv) {
  char response[256];

  printf("Press y to restart\n");

  if (fgets(response, sizeof(response), stdin)) {
    if (response[0] == 'y' || response[0] == 'Y') {
      pid_t pid = fork();

      if (pid == 0) {
        char path[PATH_MAX];
        uint32_t size = (uint32_t)sizeof(path);

        if (_NSGetExecutablePath(path, &size) == 0) {
          printf("path = %s\n", path);

          char resolved[PATH_MAX];

          realpath(path, resolved);

          printf("resolved = %s\n", resolved);

          char* args[] = { realpath, NULL };

          execvp(resolved, args);

          return 0;
        } else {
          fprintf(stderr, "Error getting executable path.\n");

          return 1;
        }
      } else {
        printf("Exiting parent.\n");

        return 0;
      }
    } else {
      printf("Exiting\n");
    }
  } else {
    fprintf(stderr, "Error reading from stdin\n.");

    return 1;
  }

  return 0;
}