| /* Definitions for managing subprocesses in GNU Make. |
| Copyright (C) 1992-2016 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) || !defined(F_GETFD) |
| # 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 */ |
| int vms_launch_status; /* non-zero if lib$spawn, etc failed */ |
| #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 recursive:1; /* Nonzero for recursive command ('+' etc.) */ |
| unsigned int dontcare:1; /* Saved dontcare flag. */ |
| }; |
| |
| extern struct child *children; |
| |
| /* A signal handler for SIGCHLD, if needed. */ |
| RETSIGTYPE child_handler (int sig); |
| 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 (struct child *child, char *argv); |
| #else |
| # define FD_STDIN (fileno (stdin)) |
| # define FD_STDOUT (fileno (stdout)) |
| # define FD_STDERR (fileno (stderr)) |
| int child_execute_job (struct output *out, int good_stdin, char **argv, char **envp); |
| #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; |