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Diffstat (limited to 'job.h')
| -rw-r--r-- | job.h | 159 |
1 files changed, 159 insertions, 0 deletions
@@ -0,0 +1,159 @@ +/* Definitions for managing subprocesses in GNU Make. +Copyright (C) 1992-2014 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 NO_OUTPUT_SYNC +# define RECORD_SYNC_MUTEX(m) \ + O (error, NILF, \ + _("-O[TYPE] (--output-sync[=TYPE]) is not configured for this build.")); +#else +# 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 +#endif /* !NO_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; |