job.h

   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 void new_job (struct file *file);
  70 void reap_children (int block, int err);
  71 void start_waiting_jobs (void);
  72
  73 char **construct_command_argv (char *line, char **restp, struct file *file, char** batch_file);
  74 #ifdef VMS
  75 int child_execute_job (char *argv, struct child *child);
  76 #elif defined(__EMX__)
  77 int child_execute_job (int stdin_fd, int stdout_fd, char **argv, char **envp);
  78 #else
  79 void child_execute_job (int stdin_fd, int stdout_fd, char **argv, char **envp);
  80 #endif
  81 #ifdef _AMIGA
  82 void exec_command (char **argv);
  83 #elif defined(__EMX__)
  84 int exec_command (char **argv, char **envp);
  85 #else
  86 void exec_command (char **argv, char **envp);
  87 #endif
  88
  89 extern unsigned int job_slots_used;
  90
  91 void block_sigs (void);
  92 #ifdef POSIX
  93 void unblock_sigs (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 */