job.h

   1 /* Definitions for managing subprocesses in GNU Make.
   2 Copyright (C) 1992-2012 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 it under the
   6 terms of the GNU General Public License as published by the Free Software
   7 Foundation; either version 3 of the License, or (at your option) any later
   8 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 #ifndef SEEN_JOB_H
  18 #define SEEN_JOB_H
  19
  20 #ifdef HAVE_FCNTL_H
  21 # include <fcntl.h>
  22 #else
  23 # include <sys/file.h>
  24 #endif
  25
  26 /* How to set close-on-exec for a file descriptor.  */
  27
  28 #if !defined F_SETFD
  29 # define CLOSE_ON_EXEC(_d)
  30 #else
  31 # ifndef FD_CLOEXEC
  32 #  define FD_CLOEXEC 1
  33 # endif
  34 # define CLOSE_ON_EXEC(_d) (void) fcntl ((_d), F_SETFD, FD_CLOEXEC)
  35 #endif
  36
  37 /* Structure describing a running or dead child process.  */
  38
  39 struct child
  40   {
  41     struct child *next;         /* Link in the chain.  */
  42
  43     struct file *file;          /* File being remade.  */
  44
  45     char **environment;         /* Environment for commands.  */
  46
  47     char **command_lines;       /* Array of variable-expanded cmd lines.  */
  48     unsigned int command_line;  /* Index into above.  */
  49     char *command_ptr;          /* Ptr into command_lines[command_line].  */
  50
  51     pid_t pid;                  /* Child process's ID number.  */
  52 #ifdef VMS
  53     int efn;                    /* Completion event flag number */
  54     int cstatus;                /* Completion status */
  55     char *comname;              /* Temporary command file name */
  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 int is_bourne_compatible_shell(const char *path);
  70 void new_job (struct file *file);
  71 void reap_children (int block, int err);
  72 void start_waiting_jobs (void);
  73
  74 char **construct_command_argv (char *line, char **restp, struct file *file,
  75                                int cmd_flags, char** batch_file);
  76 #ifdef VMS
  77 int child_execute_job (char *argv, struct child *child);
  78 #elif defined(__EMX__)
  79 int child_execute_job (int stdin_fd, int stdout_fd, char **argv, char **envp);
  80 #else
  81 void child_execute_job (int stdin_fd, int stdout_fd, char **argv, char **envp);
  82 #endif
  83 #ifdef _AMIGA
  84 void exec_command (char **argv);
  85 #elif defined(__EMX__)
  86 int exec_command (char **argv, char **envp);
  87 #else
  88 void exec_command (char **argv, char **envp);
  89 #endif
  90
  91 extern unsigned int job_slots_used;
  92
  93 void block_sigs (void);
  94 #ifdef POSIX
  95 void unblock_sigs (void);
  96 #else
  97 #ifdef  HAVE_SIGSETMASK
  98 extern int fatal_signal_mask;
  99 #define unblock_sigs()  sigsetmask (0)
 100 #else
 101 #define unblock_sigs()
 102 #endif
 103 #endif
 104
 105 extern unsigned int jobserver_tokens;
 106
 107 #endif /* SEEN_JOB_H */