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      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 Free Software Foundation, Inc.
      4 This file is part of GNU Make.
      5 
      6 GNU Make is free software; you can redistribute it and/or modify it under the
      7 terms of the GNU General Public License as published by the Free Software
      8 Foundation; either version 2, or (at your option) any later version.
      9 
     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.
     13 
     14 You should have received a copy of the GNU General Public License along with
     15 GNU Make; see the file COPYING.  If not, write to the Free Software
     16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.  */
     17 
     18 #ifndef SEEN_JOB_H
     19 #define SEEN_JOB_H
     20 
     21 #ifdef HAVE_FCNTL_H
     22 # include <fcntl.h>
     23 #else
     24 # include <sys/file.h>
     25 #endif
     26 
     27 /* How to set close-on-exec for a file descriptor.  */
     28 
     29 #if !defined F_SETFD
     30 # define CLOSE_ON_EXEC(_d)
     31 #else
     32 # ifndef FD_CLOEXEC
     33 #  define FD_CLOEXEC 1
     34 # endif
     35 # define CLOSE_ON_EXEC(_d) (void) fcntl ((_d), F_SETFD, FD_CLOEXEC)
     36 #endif
     37 
     38 /* Structure describing a running or dead child process.  */
     39 
     40 struct child
     41   {
     42     struct child *next;		/* Link in the chain.  */
     43 
     44     struct file *file;		/* File being remade.  */
     45 
     46     char **environment;		/* Environment for commands.  */
     47 
     48     char **command_lines;	/* Array of variable-expanded cmd lines.  */
     49     unsigned int command_line;	/* Index into above.  */
     50     char *command_ptr;		/* Ptr into command_lines[command_line].  */
     51 
     52     pid_t pid;			/* Child process's ID number.  */
     53 #ifdef VMS
     54     int efn;			/* Completion event flag number */
     55     int cstatus;		/* Completion status */
     56 #endif
     57     char *sh_batch_file;        /* Script file for shell commands */
     58     unsigned int remote:1;	/* Nonzero if executing remotely.  */
     59 
     60     unsigned int noerror:1;	/* Nonzero if commands contained a `-'.  */
     61 
     62     unsigned int good_stdin:1;	/* Nonzero if this child has a good stdin.  */
     63     unsigned int deleted:1;	/* Nonzero if targets have been deleted.  */
     64     unsigned int dontcare:1;    /* Saved dontcare flag.  */
     65   };
     66 
     67 extern struct child *children;
     68 
     69 extern void new_job PARAMS ((struct file *file));
     70 extern void reap_children PARAMS ((int block, int err));
     71 extern void start_waiting_jobs PARAMS ((void));
     72 
     73 extern char **construct_command_argv PARAMS ((char *line, char **restp, struct file *file, char** batch_file));
     74 #ifdef VMS
     75 extern int child_execute_job PARAMS ((char *argv, struct child *child));
     76 #elif defined(__EMX__)
     77 extern int child_execute_job PARAMS ((int stdin_fd, int stdout_fd, char **argv, char **envp));
     78 #else
     79 extern void child_execute_job PARAMS ((int stdin_fd, int stdout_fd, char **argv, char **envp));
     80 #endif
     81 #ifdef _AMIGA
     82 extern void exec_command PARAMS ((char **argv));
     83 #elif defined(__EMX__)
     84 extern int exec_command PARAMS ((char **argv, char **envp));
     85 #else
     86 extern void exec_command PARAMS ((char **argv, char **envp));
     87 #endif
     88 
     89 extern unsigned int job_slots_used;
     90 
     91 extern void block_sigs PARAMS ((void));
     92 #ifdef POSIX
     93 extern void unblock_sigs PARAMS ((void));
     94 #else
     95 #ifdef	HAVE_SIGSETMASK
     96 extern int fatal_signal_mask;
     97 #define	unblock_sigs()	sigsetmask (0)
     98 #else
     99 #define	unblock_sigs()
    100 #endif
    101 #endif
    102 
    103 extern unsigned int jobserver_tokens;
    104 
    105 #endif /* SEEN_JOB_H */
    106