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, 2007, 2008, 2009 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 3 of the License, or (at your option) any later
   9 version.
  10
  11 GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  13 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License along with
  16 this program.  If not, see <http://www.gnu.org/licenses/>.  */
  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     char *comname;              /* Temporary command file name */
  57 #endif
  58     char *sh_batch_file;        /* Script file for shell commands */
  59     unsigned int remote:1;      /* Nonzero if executing remotely.  */
  60
  61     unsigned int noerror:1;     /* Nonzero if commands contained a `-'.  */
  62
  63     unsigned int good_stdin:1;  /* Nonzero if this child has a good stdin.  */
  64     unsigned int deleted:1;     /* Nonzero if targets have been deleted.  */
  65     unsigned int dontcare:1;    /* Saved dontcare flag.  */
  66   };
  67
  68 extern struct child *children;
  69
  70 int is_bourne_compatible_shell(const char *path);
  71 void new_job (struct file *file);
  72 void reap_children (int block, int err);
  73 void start_waiting_jobs (void);
  74
  75 char **construct_command_argv (char *line, char **restp, struct file *file,
  76                                int cmd_flags, char** batch_file);
  77 #ifdef VMS
  78 int child_execute_job (char *argv, struct child *child);
  79 #elif defined(__EMX__)
  80 int child_execute_job (int stdin_fd, int stdout_fd, char **argv, char **envp);
  81 #else
  82 void child_execute_job (int stdin_fd, int stdout_fd, char **argv, char **envp);
  83 #endif
  84 #ifdef _AMIGA
  85 void exec_command (char **argv);
  86 #elif defined(__EMX__)
  87 int exec_command (char **argv, char **envp);
  88 #else
  89 void exec_command (char **argv, char **envp);
  90 #endif
  91
  92 extern unsigned int job_slots_used;
  93
  94 void block_sigs (void);
  95 #ifdef POSIX
  96 void unblock_sigs (void);
  97 #else
  98 #ifdef  HAVE_SIGSETMASK
  99 extern int fatal_signal_mask;
 100 #define unblock_sigs()  sigsetmask (0)
 101 #else
 102 #define unblock_sigs()
 103 #endif
 104 #endif
 105
 106 extern unsigned int jobserver_tokens;
 107
 108 #endif /* SEEN_JOB_H */