oksh.c

#include "header.h"

// global 変数
child_t *head = NULL;
child_t *tail = NULL;
int sum_child = 0; // tail number and running process
//　foregroundになっているプロセスの情報を保存
pid_t foreground_pid;
bool foreground_check = false;
char *env[512];
int env_num;

int main(void)
{
  // jobs
  int status;

  // Internal command
  char *internal_command[] = {"quit", "q"};

  if (signal(SIGINT, signal_sigint) == SIG_ERR)
  {
    exit(EXIT_FAILURE);
  }
  if (signal(SIGCHLD, signal_fin) == SIG_ERR)
  {
    exit(EXIT_FAILURE);
  }

  env_num = get_path(env);

  while (1)
  {

    // char **argv = (char **)calloc(10, sizeof(char *));
    // char **argv = (char **)malloc(10 * sizeof(char *));
    char **argv = malloc(10 * sizeof(char *));

    printf("> ");

    int argc = read_cmd(argv);

    if (argc < 1)
    {
      continue;
    }

    // & check and & delete
    bool background_flag = false;
    if (argc > 1)
    {
      if (strncmp(argv[argc - 1], "&", 2) == 0)
      {
        argv[argc - 1] = NULL;
        background_flag = true;
      }
    }

    // inner command start
    if (strncmp(argv[0], internal_command[0], 5) == 0 ||
        strncmp(argv[0], internal_command[1], 2) == 0)
    {
      break;
    }

    if (strncmp(argv[0], "fg", 3) == 0)
    {
      if (sum_child > 0)
      {
        fg(argv[1]);
      }
      continue;
    }

    if (strncmp(argv[0], "jobs", 5) == 0)
    {
      jobs();
      continue;
    }
    // inner command end

#if FLAG
    // create full path
    if (strncmp(argv[0], "/", 1) != 0)
    {
      if (create_full_path(argv) == -1)
      {
        puts("not found");
        continue;
      }
    }
#else
#endif

    // generate child process
    pid_t pid = execute(argv);

    printf("start %s (pid: %d)\n", argv[0], pid);

    add_process(pid, background_flag);

    // wait child process Foreground
    if (!background_flag)
    {
      foreground_check = true;
      foreground_pid = pid;
      // Foreground do
      pid = waitpid(pid, &status, 0);
      foreground_check = false;
    }

    free(*argv);
    free(argv);
  }
  return 1;
}