In very obscure situations we may write the free token back to the pipe.
[make.git] / job.h
blobd346b5e9bc07eda87f8c33c785cd90465a0ce30a
1 /* Definitions for managing subprocesses in GNU Make.
2 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
3 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software
4 Foundation, Inc.
5 This file is part of GNU Make.
7 GNU Make is free software; you can redistribute it and/or modify it under the
8 terms of the GNU General Public License as published by the Free Software
9 Foundation; either version 3 of the License, or (at your option) any later
10 version.
12 GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
14 A PARTICULAR PURPOSE. See the GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License along with
17 this program. If not, see <http://www.gnu.org/licenses/>. */
19 #ifndef SEEN_JOB_H
20 #define SEEN_JOB_H
22 #ifdef HAVE_FCNTL_H
23 # include <fcntl.h>
24 #else
25 # include <sys/file.h>
26 #endif
28 /* How to set close-on-exec for a file descriptor. */
30 #if !defined F_SETFD
31 # define CLOSE_ON_EXEC(_d)
32 #else
33 # ifndef FD_CLOEXEC
34 # define FD_CLOEXEC 1
35 # endif
36 # define CLOSE_ON_EXEC(_d) (void) fcntl ((_d), F_SETFD, FD_CLOEXEC)
37 #endif
39 /* Structure describing a running or dead child process. */
41 struct child
43 struct child *next; /* Link in the chain. */
45 struct file *file; /* File being remade. */
47 char **environment; /* Environment for commands. */
49 char **command_lines; /* Array of variable-expanded cmd lines. */
50 unsigned int command_line; /* Index into above. */
51 char *command_ptr; /* Ptr into command_lines[command_line]. */
53 pid_t pid; /* Child process's ID number. */
54 #ifdef VMS
55 int efn; /* Completion event flag number */
56 int cstatus; /* Completion status */
57 char *comname; /* Temporary command file name */
58 #endif
59 char *sh_batch_file; /* Script file for shell commands */
60 unsigned int remote:1; /* Nonzero if executing remotely. */
62 unsigned int noerror:1; /* Nonzero if commands contained a `-'. */
64 unsigned int good_stdin:1; /* Nonzero if this child has a good stdin. */
65 unsigned int deleted:1; /* Nonzero if targets have been deleted. */
66 unsigned int dontcare:1; /* Saved dontcare flag. */
69 extern struct child *children;
71 int is_bourne_compatible_shell(const char *path);
72 void new_job (struct file *file);
73 void reap_children (int block, int err);
74 void start_waiting_jobs (void);
76 char **construct_command_argv (char *line, char **restp, struct file *file,
77 int cmd_flags, char** batch_file);
78 #ifdef VMS
79 int child_execute_job (char *argv, struct child *child);
80 #elif defined(__EMX__)
81 int child_execute_job (int stdin_fd, int stdout_fd, char **argv, char **envp);
82 #else
83 void child_execute_job (int stdin_fd, int stdout_fd, char **argv, char **envp);
84 #endif
85 #ifdef _AMIGA
86 void exec_command (char **argv);
87 #elif defined(__EMX__)
88 int exec_command (char **argv, char **envp);
89 #else
90 void exec_command (char **argv, char **envp);
91 #endif
93 extern unsigned int job_slots_used;
95 void block_sigs (void);
96 #ifdef POSIX
97 void unblock_sigs (void);
98 #else
99 #ifdef HAVE_SIGSETMASK
100 extern int fatal_signal_mask;
101 #define unblock_sigs() sigsetmask (0)
102 #else
103 #define unblock_sigs()
104 #endif
105 #endif
107 extern unsigned int jobserver_tokens;
109 #endif /* SEEN_JOB_H */