job.h

   1 /* Definitions for managing subprocesses in GNU Make.
   2 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
   3 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software
   4 Foundation, Inc.
   5 This file is part of GNU Make.
   6
   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.
  11
  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.
  15
  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/>.  */
  18
  19 #ifndef SEEN_JOB_H
  20 #define SEEN_JOB_H
  21
  22 #ifdef HAVE_FCNTL_H
  23 # include <fcntl.h>
  24 #else
  25 # include <sys/file.h>
  26 #endif
  27
  28 /* How to set close-on-exec for a file descriptor.  */
  29
  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
  38
  39 /* Structure describing a running or dead child process.  */
  40
  41 struct child
  42   {
  43     struct child *next;         /* Link in the chain.  */
  44
  45     struct file *file;          /* File being remade.  */
  46
  47     char **environment;         /* Environment for commands.  */
  48
  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].  */
  52
  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.  */
  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     unsigned int dontcare:1;    /* Saved dontcare flag.  */
  67   };
  68
  69 extern struct child *children;
  70
  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);
  75
  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
  92
  93 extern unsigned int job_slots_used;
  94
  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
 106
 107 extern unsigned int jobserver_tokens;
 108
 109 #endif /* SEEN_JOB_H */