job.h

   1 /* Definitions for managing subprocesses in GNU Make.
   2 Copyright (C) 1992, 1993, 1996, 1999 Free Software Foundation, Inc.
   3 This file is part of GNU Make.
   4
   5 GNU Make is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2, or (at your option)
   8 any later version.
   9
  10 GNU Make is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with GNU Make; see the file COPYING.  If not, write to
  17 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18 Boston, MA 02111-1307, USA.  */
  19
  20 #ifndef SEEN_JOB_H
  21 #define SEEN_JOB_H
  22
  23 #ifdef HAVE_FCNTL_H
  24 # include <fcntl.h>
  25 #else
  26 # include <sys/file.h>
  27 #endif
  28
  29 /* How to set close-on-exec for a file descriptor.  */
  30
  31 #if !defined F_SETFD
  32 # define CLOSE_ON_EXEC(_d)
  33 #else
  34 # ifndef FD_CLOEXEC
  35 #  define FD_CLOEXEC 1
  36 # endif
  37 # define CLOSE_ON_EXEC(_d) (void) fcntl ((_d), F_SETFD, FD_CLOEXEC)
  38 #endif
  39
  40 /* Structure describing a running or dead child process.  */
  41
  42 struct child
  43   {
  44     struct child *next;         /* Link in the chain.  */
  45
  46     struct file *file;          /* File being remade.  */
  47
  48     char **environment;         /* Environment for commands.  */
  49
  50     char **command_lines;       /* Array of variable-expanded cmd lines.  */
  51     unsigned int command_line;  /* Index into above.  */
  52     char *command_ptr;          /* Ptr into command_lines[command_line].  */
  53
  54     pid_t pid;                  /* Child process's ID number.  */
  55 #ifdef VMS
  56     int efn;                    /* Completion event flag number */
  57     int cstatus;                /* Completion status */
  58 #endif
  59     char *sh_batch_file;        /* Script file for shell commands */
  60     unsigned int remote:1;      /* Nonzero if executing remotely.  */
  61
  62     unsigned int noerror:1;     /* Nonzero if commands contained a `-'.  */
  63
  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   };
  67
  68 extern struct child *children;
  69
  70 extern void new_job PARAMS ((struct file *file));
  71 extern void reap_children PARAMS ((int block, int err));
  72 extern void start_waiting_jobs PARAMS ((void));
  73
  74 extern char **construct_command_argv PARAMS ((char *line, char **restp, struct file *file, char** batch_file));
  75 #ifdef VMS
  76 extern int child_execute_job PARAMS ((char *argv, struct child *child));
  77 #elif defined(__EMX__)
  78 extern int child_execute_job PARAMS ((int stdin_fd, int stdout_fd, char **argv, char **envp));
  79 #else
  80 extern void child_execute_job PARAMS ((int stdin_fd, int stdout_fd, char **argv, char **envp));
  81 #endif
  82 #ifdef _AMIGA
  83 extern void exec_command PARAMS ((char **argv));
  84 #elif defined(__EMX__)
  85 extern int exec_command PARAMS ((char **argv, char **envp));
  86 #else
  87 extern void exec_command PARAMS ((char **argv, char **envp));
  88 #endif
  89
  90 extern unsigned int job_slots_used;
  91
  92 extern void block_sigs PARAMS ((void));
  93 #ifdef POSIX
  94 extern void unblock_sigs PARAMS ((void));
  95 #else
  96 #ifdef  HAVE_SIGSETMASK
  97 extern int fatal_signal_mask;
  98 #define unblock_sigs()  sigsetmask (0)
  99 #else
 100 #define unblock_sigs()
 101 #endif
 102 #endif
 103
 104 #endif /* SEEN_JOB_H */