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2b8e3bb23f
* configure.ac: Check sys/file.h and assume fileno() always exists. * output.h: Move output-specific content from job.h to output.h. * os.h (fd_inherit, fd_noinherit): New functions manage FD inheritance. * posixos.c (fd_inherit, fd_noinherit): Implement for POSIX systems. (jobserver_setup): Force jobserver FDs to not be inherited by default. (jobserver_pre_child): Enable inheritance in recursive invocations. (jobserver_post_child): Disable inheritance after recursive invocations. * w32/w32os.c (fd_inherit, fd_noinherit): Implement for W32 systems. * job.h (CLOSE_ON_EXEC): Remove macro in deference to new fd_noinherit. * function.c (func_shell_base): Convert CLOSE_ON_EXEC to fd_noinherit. * job.c (child_execute_job): Ditto. * output.c (setup_tmpfile): Ditto. * read.c (eval_makefile): Ditto, plus remove HAVE_FILENO check. * w32/include/sub_proc.h: Remove process_noinherit for fd_noinherit. * w32/subproc/sub_proc.c: Ditto.
93 lines
3.3 KiB
C
93 lines
3.3 KiB
C
/* Definitions for managing subprocesses in GNU Make.
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Copyright (C) 1992-2016 Free Software Foundation, Inc.
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This file is part of GNU Make.
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GNU Make is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3 of the License, or (at your option) any later
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version.
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GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "output.h"
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/* Structure describing a running or dead child process. */
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struct child
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{
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struct child *next; /* Link in the chain. */
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struct file *file; /* File being remade. */
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char **environment; /* Environment for commands. */
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char *sh_batch_file; /* Script file for shell commands */
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char **command_lines; /* Array of variable-expanded cmd lines. */
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char *command_ptr; /* Ptr into command_lines[command_line]. */
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#ifdef VMS
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char *comname; /* Temporary command file name */
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int efn; /* Completion event flag number */
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int cstatus; /* Completion status */
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int vms_launch_status; /* non-zero if lib$spawn, etc failed */
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#endif
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unsigned int command_line; /* Index into command_lines. */
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struct output output; /* Output for this child. */
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pid_t pid; /* Child process's ID number. */
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unsigned int remote:1; /* Nonzero if executing remotely. */
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unsigned int noerror:1; /* Nonzero if commands contained a '-'. */
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unsigned int good_stdin:1; /* Nonzero if this child has a good stdin. */
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unsigned int deleted:1; /* Nonzero if targets have been deleted. */
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unsigned int recursive:1; /* Nonzero for recursive command ('+' etc.) */
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unsigned int dontcare:1; /* Saved dontcare flag. */
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};
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extern struct child *children;
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/* A signal handler for SIGCHLD, if needed. */
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RETSIGTYPE child_handler (int sig);
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int is_bourne_compatible_shell(const char *path);
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void new_job (struct file *file);
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void reap_children (int block, int err);
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void start_waiting_jobs (void);
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char **construct_command_argv (char *line, char **restp, struct file *file,
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int cmd_flags, char** batch_file);
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#ifdef VMS
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int child_execute_job (struct child *child, char *argv);
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#else
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# define FD_STDIN (fileno (stdin))
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# define FD_STDOUT (fileno (stdout))
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# define FD_STDERR (fileno (stderr))
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int child_execute_job (struct output *out, int good_stdin, char **argv, char **envp);
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#endif
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#ifdef _AMIGA
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void exec_command (char **argv) __attribute__ ((noreturn));
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#elif defined(__EMX__)
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int exec_command (char **argv, char **envp);
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#else
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void exec_command (char **argv, char **envp) __attribute__ ((noreturn));
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#endif
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extern unsigned int job_slots_used;
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void block_sigs (void);
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#ifdef POSIX
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void unblock_sigs (void);
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#else
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#ifdef HAVE_SIGSETMASK
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extern int fatal_signal_mask;
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#define unblock_sigs() sigsetmask (0)
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#else
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#define unblock_sigs()
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#endif
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#endif
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extern unsigned int jobserver_tokens;
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