1 /* Definitions for managing subprocesses in GNU Make.
2 Copyright (C) 1992-2013 Free Software Foundation, Inc.
3 This file is part of GNU Make.
5 GNU Make is free software; you can redistribute it and/or modify it under the
6 terms of the GNU General Public License as published by the Free Software
7 Foundation; either version 3 of the License, or (at your option) any later
10 GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
11 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12 A PARTICULAR PURPOSE. See the GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License along with
15 this program. If not, see <http://www.gnu.org/licenses/>. */
22 # include <sys/file.h>
25 /* How to set close-on-exec for a file descriptor. */
29 # define CLOSE_ON_EXEC(_d) process_noinherit(_d)
31 # define CLOSE_ON_EXEC(_d)
37 # define CLOSE_ON_EXEC(_d) (void) fcntl ((_d), F_SETFD, FD_CLOEXEC)
41 # define RECORD_SYNC_MUTEX(m) \
43 _("-O[TYPE] (--output-sync[=TYPE]) is not configured for this build."));
46 /* For emulations in w32/compat/posixfcn.c. */
49 /* Implementation note: None of the values of l_type below can be zero
50 -- they are compared with a static instance of the struct, so zero
51 means unknown/invalid, see w32/compat/posixfcn.c. */
64 /* This type is actually a HANDLE, but we want to avoid including
65 windows.h as much as possible. */
66 typedef intptr_t sync_handle_t;
68 /* Public functions emulated/provided in posixfcn.c. */
69 int fcntl (intptr_t fd, int cmd, ...);
70 intptr_t create_mutex (void);
71 int same_stream (FILE *f1, FILE *f2);
73 # define RECORD_SYNC_MUTEX(m) record_sync_mutex(m)
74 void record_sync_mutex (const char *str);
75 void prepare_mutex_handle_string (intptr_t hdl);
76 # else /* !WINDOWS32 */
78 typedef int sync_handle_t; /* file descriptor */
80 # define RECORD_SYNC_MUTEX(m) (void)(m)
83 #endif /* !NO_OUTPUT_SYNC */
85 /* Structure describing a running or dead child process. */
89 struct child *next; /* Link in the chain. */
91 struct file *file; /* File being remade. */
93 char **environment; /* Environment for commands. */
94 char *sh_batch_file; /* Script file for shell commands */
95 char **command_lines; /* Array of variable-expanded cmd lines. */
96 char *command_ptr; /* Ptr into command_lines[command_line]. */
99 char *comname; /* Temporary command file name */
100 int efn; /* Completion event flag number */
101 int cstatus; /* Completion status */
104 unsigned int command_line; /* Index into command_lines. */
105 struct output output; /* Output for this child. */
106 pid_t pid; /* Child process's ID number. */
107 unsigned int remote:1; /* Nonzero if executing remotely. */
108 unsigned int noerror:1; /* Nonzero if commands contained a '-'. */
109 unsigned int good_stdin:1; /* Nonzero if this child has a good stdin. */
110 unsigned int deleted:1; /* Nonzero if targets have been deleted. */
111 unsigned int dontcare:1; /* Saved dontcare flag. */
114 extern struct child *children;
116 int is_bourne_compatible_shell(const char *path);
117 void new_job (struct file *file);
118 void reap_children (int block, int err);
119 void start_waiting_jobs (void);
121 char **construct_command_argv (char *line, char **restp, struct file *file,
122 int cmd_flags, char** batch_file);
124 int child_execute_job (char *argv, struct child *child);
126 # define FD_STDIN (fileno (stdin))
127 # define FD_STDOUT (fileno (stdout))
128 # define FD_STDERR (fileno (stderr))
129 # if defined(__EMX__)
130 int child_execute_job (int stdin_fd, int stdout_fd, int stderr_fd,
131 char **argv, char **envp);
133 void child_execute_job (int stdin_fd, int stdout_fd, int stderr_fd,
134 char **argv, char **envp) __attribute__ ((noreturn));
138 void exec_command (char **argv) __attribute__ ((noreturn));
139 #elif defined(__EMX__)
140 int exec_command (char **argv, char **envp);
142 void exec_command (char **argv, char **envp) __attribute__ ((noreturn));
145 extern unsigned int job_slots_used;
147 void block_sigs (void);
149 void unblock_sigs (void);
151 #ifdef HAVE_SIGSETMASK
152 extern int fatal_signal_mask;
153 #define unblock_sigs() sigsetmask (0)
155 #define unblock_sigs()
159 extern unsigned int jobserver_tokens;