/* Definitions for managing subprocesses in GNU Make.
Copyright (C) 1992-2012 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 3 of the License, 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
this program.  If not, see <http://www.gnu.org/licenses/>.  */

#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 *sh_batch_file;        /* Script file for shell commands */
    char **command_lines;	/* Array of variable-expanded cmd lines.  */
    char *command_ptr;		/* Ptr into command_lines[command_line].  */

#ifdef VMS
    char *comname;              /* Temporary command file name */
    int efn;			/* Completion event flag number */
    int cstatus;		/* Completion status */
#endif

    unsigned int command_line;	/* Index into command_lines.  */
    pid_t pid;			/* Child process's ID number.  */
    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.  */
    unsigned int dontcare:1;    /* Saved dontcare flag.  */
#ifdef OUTPUT_SYNC
    int outfd;			/* File descriptor for saving stdout */
    int errfd;			/* File descriptor for saving stderr */
#endif
  };

extern struct child *children;

int is_bourne_compatible_shell(const char *path);
void new_job (struct file *file);
void reap_children (int block, int err);
void start_waiting_jobs (void);

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

extern unsigned int job_slots_used;

void block_sigs (void);
#ifdef POSIX
void unblock_sigs (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;

#endif /* SEEN_JOB_H */