/* Definitions for managing subprocesses in GNU Make.
Copyright (C) 1992, 1993, 1996, 1999 Free Software Foundation, Inc.
This file is part of GNU Make.

GNU Make is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Make is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Make; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#ifndef SEEN_JOB_H
#define SEEN_JOB_H

#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#else
# include <sys/file.h>
#endif

/* How to set close-on-exec for a file descriptor.  */

#if !defined F_SETFD
# define CLOSE_ON_EXEC(_d)
#else
# ifndef FD_CLOEXEC
#  define FD_CLOEXEC 1
# endif
# define CLOSE_ON_EXEC(_d) (void) fcntl ((_d), F_SETFD, FD_CLOEXEC)
#endif

/* Structure describing a running or dead child process.  */

struct child
  {
    struct child *next;		/* Link in the chain.  */

    struct file *file;		/* File being remade.  */

    char **environment;		/* Environment for commands.  */

    char **command_lines;	/* Array of variable-expanded cmd lines.  */
    unsigned int command_line;	/* Index into above.  */
    char *command_ptr;		/* Ptr into command_lines[command_line].  */

    pid_t pid;			/* Child process's ID number.  */
#ifdef VMS
    int efn;			/* Completion event flag number */
    int cstatus;		/* Completion status */
#endif
    char *sh_batch_file;        /* Script file for shell commands */
#if defined(CONFIG_WITH_KMK_BUILTIN) || defined(MAKE_DLLSHELL)
    int status;                 /* Status of the job. */
    unsigned int have_status:1; /* Nonzero if status is available. */
#endif
#ifdef MAKE_DLLSHELL
    unsigned int dllshelled:1;  /* Nonzero if executed thru dllshell. */
#endif
    unsigned int remote:1;	/* Nonzero if executing remotely.  */

    unsigned int noerror:1;	/* Nonzero if commands contained a `-'.  */

    unsigned int good_stdin:1;	/* Nonzero if this child has a good stdin.  */
    unsigned int deleted:1;	/* Nonzero if targets have been deleted.  */
  };

extern struct child *children;

extern void new_job PARAMS ((struct file *file));
extern void reap_children PARAMS ((int block, int err));
extern void start_waiting_jobs PARAMS ((void));

extern char **construct_command_argv PARAMS ((char *line, char **restp, struct file *file, char** batch_file));
#ifdef VMS
extern int child_execute_job PARAMS ((char *argv, struct child *child));
#elif defined(__EMX__) || defined (MAKE_DLLSHELL)
extern int child_execute_job PARAMS ((int stdin_fd, int stdout_fd, char **argv, char **envp, struct child *child));
#else
extern void child_execute_job PARAMS ((int stdin_fd, int stdout_fd, char **argv, char **envp));
#endif
#ifdef _AMIGA
extern void exec_command PARAMS ((char **argv));
#elif defined(__EMX__)
extern int exec_command PARAMS ((char **argv, char **envp));
#else
extern void exec_command PARAMS ((char **argv, char **envp));
#endif

extern unsigned int job_slots_used;

extern void block_sigs PARAMS ((void));
#ifdef POSIX
extern void unblock_sigs PARAMS ((void));
#else
#ifdef	HAVE_SIGSETMASK
extern int fatal_signal_mask;
#define	unblock_sigs()	sigsetmask (0)
#else
#define	unblock_sigs()
#endif
#endif

extern unsigned int jobserver_tokens;

#ifdef MAKE_DLLSHELL
extern pid_t wait_jobs PARAMS ((int *status, int block));
#endif

#endif /* SEEN_JOB_H */