ICFS/src/ui-socket.c

/*
  ICFS: Interactively Controlled File System
  Copyright (C) 2024-2025  Fedir Kovalov

  This program can be distributed under the terms of the GNU GPLv2.
  See the file LICENSE.
*/

#include <stddef.h>
#include <sys/types.h>
#define _GNU_SOURCE
#include "ui-socket.h"
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>

int init_ui_socket(const char *filename) {
  char line[256];
  FILE *fp;

  // Test if Zenity is installed (get version)
  fp = popen("zenity --version", "r");
  if (fp == NULL) {
    perror("Pipe returned a error");
    return 1;
  } else {
    while (fgets(line, sizeof(line), fp))
      printf("%s", line);
    pclose(fp);
    return 0;
  }
}

/**
 * @param filename: The file that the process is trying to access
 * @pram pi: The process information
 * @return: 0 if access is denied, 1 if access is allowed, 2 if access is allwed
 * for the runtime of the process
 */
int ask_access(const char *filename, struct process_info pi) {

  FILE *fp;
  size_t command_len =
      139 + sizeof(pid_t) * 8 + strlen(pi.name) + strlen(filename);
  char *command = (char *)malloc(command_len);
  snprintf(command, command_len,
           "zenity --question --extra-button \"Allow this time\" --title "
           "\"Allow Access?\" --text \"Allow process "
           "<tt>%s</tt> with PID <tt>%d</tt> to access <tt>%s</tt>\"",
           pi.name, pi.PID, filename);

  // Zenity Question Message Popup
  fp = popen(command, "r");
  free(command);

  if (fp == NULL) {
    perror("Pipe returned a error");
    return -1;
  }

  // if the user clicks the "Allow this time" button, `zenity` will only
  // write it to `stdout`, but the exit code will still be `1`. So, we need
  // to manually check the output.
  char buffer[1024];
  while (fgets(buffer, sizeof(buffer), fp)) {
    if (strcmp(buffer, "Allow this time.\n") == 0) {
      pclose(fp);
      return 2;
    }
  }

  int zenity_exit_code = WEXITSTATUS(pclose(fp));
  return zenity_exit_code;
}