/* A process is a single process.  */
typedef struct process
{
  struct process *next;       /* next process in pipeline */
  char **argv;                /* for exec */
  pid_t pid;                  /* process ID */
  char completed;             /* true if process has completed */
  char stopped;               /* true if process has stopped */
  int status;                 /* reported status value */
} process;

/* A job is a pipeline of processes.  */
typedef struct job
{
  struct job *next;           /* next active job */
  char *command;              /* command line, used for messages */
  process *first_process;     /* list of processes in this job */
  pid_t pgid;                 /* process group ID */
  char notified;              /* true if user told about stopped job */
  struct termios tmodes;      /* saved terminal modes */
  int stdin, stdout, stderr;  /* standard i/o channels */
} job;

/* The active jobs are linked into a list.  This is its head.   */
job *first_job = NULL;

/* Find the active job with the indicated pgid.  */
job *
find_job (pid_t pgid)
{
  job *j;

  for (j = first_job; j; j = j->next)
    if (j->pgid == pgid)
      return j;
  return NULL;
}

/* Return true if all processes in the job have stopped or completed.  */
int
job_is_stopped (job *j)
{
  process *p;

  for (p = j->first_process; p; p = p->next)
    if (!p->completed && !p->stopped)
      return 0;
  return 1;
}

/* Return true if all processes in the job have completed.  */
int
job_is_completed (job *j)
{
  process *p;

  for (p = j->first_process; p; p = p->next)
    if (!p->completed)
      return 0;
  return 1;
}