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/* Definitions for managing subprocesses in GNU Make.
Copyright (C) 1992-2013 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/>. */
#include "output.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
# ifdef WINDOWS32
# define CLOSE_ON_EXEC(_d) process_noinherit(_d)
# else
# define CLOSE_ON_EXEC(_d)
# endif
#else
# ifndef FD_CLOEXEC
# define FD_CLOEXEC 1
# endif
# define CLOSE_ON_EXEC(_d) (void) fcntl ((_d), F_SETFD, FD_CLOEXEC)
#endif
#ifdef OUTPUT_SYNC
# ifdef WINDOWS32
/* For emulations in w32/compat/posixfcn.c. */
# define F_GETFD 1
# define F_SETLKW 2
/* Implementation note: None of the values of l_type below can be zero
-- they are compared with a static instance of the struct, so zero
means unknown/invalid, see w32/compat/posixfcn.c. */
# define F_WRLCK 1
# define F_UNLCK 2
struct flock
{
short l_type;
short l_whence;
off_t l_start;
off_t l_len;
pid_t l_pid;
};
/* This type is actually a HANDLE, but we want to avoid including
windows.h as much as possible. */
typedef intptr_t sync_handle_t;
/* Public functions emulated/provided in posixfcn.c. */
int fcntl (intptr_t fd, int cmd, ...);
intptr_t create_mutex (void);
int same_stream (FILE *f1, FILE *f2);
# define RECORD_SYNC_MUTEX(m) record_sync_mutex(m)
void record_sync_mutex (const char *str);
void prepare_mutex_handle_string (intptr_t hdl);
# else /* !WINDOWS32 */
typedef int sync_handle_t; /* file descriptor */
# define RECORD_SYNC_MUTEX(m) (void)(m)
# endif
#else /* !OUTPUT_SYNC */
#define RECORD_SYNC_MUTEX(m) \
error (NILF, \
_("-O[TYPE] (--output-sync[=TYPE]) is not configured for this build."));
#endif /* OUTPUT_SYNC */
/* 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. */
struct output output; /* Output for this child. */
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. */
};
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);
#else
# define FD_STDIN (fileno (stdin))
# define FD_STDOUT (fileno (stdout))
# define FD_STDERR (fileno (stderr))
# if defined(__EMX__)
int child_execute_job (int stdin_fd, int stdout_fd, int stderr_fd,
char **argv, char **envp)
# else
void child_execute_job (int stdin_fd, int stdout_fd, int stderr_fd,
char **argv, char **envp) __attribute__ ((noreturn));
# endif
#endif
#ifdef _AMIGA
void exec_command (char **argv) __attribute__ ((noreturn));
#elif defined(__EMX__)
int exec_command (char **argv, char **envp);
#else
void exec_command (char **argv, char **envp) __attribute__ ((noreturn));
#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;
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