| /* Definitions for managing subprocesses in GNU Make. |
| Copyright (C) 1992-2024 Free Software Foundation, Inc. |
| This file is part of GNU Make. |
| |
| GNU Make is free software; you can redistribute it and/or modify it under the |
| terms of the GNU General Public License as published by the Free Software |
| Foundation; either version 3 of the License, or (at your option) any later |
| version. |
| |
| GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
| A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License along with |
| this program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| #include "output.h" |
| |
| /* Structure describing a running or dead child process. */ |
| |
| #if MK_OS_VMS |
| #define VMSCHILD \ |
| char *comname; /* Temporary command file name */ \ |
| int efn; /* Completion event flag number */ \ |
| int cstatus; /* Completion status */ \ |
| int vms_launch_status; /* non-zero if lib$spawn, etc failed */ |
| #else |
| #define VMSCHILD |
| #endif |
| |
| #define CHILDBASE \ |
| char *cmd_name; /* Allocated copy of command run. */ \ |
| char **environment; /* Environment for commands. */ \ |
| VMSCHILD \ |
| struct output output /* Output for this child. */ |
| |
| |
| struct childbase |
| { |
| CHILDBASE; |
| }; |
| |
| struct child |
| { |
| CHILDBASE; |
| |
| struct child *next; /* Link in the chain. */ |
| |
| struct file *file; /* File being remade. */ |
| |
| char *sh_batch_file; /* Script file for shell commands */ |
| char **command_lines; /* Array of variable-expanded cmd lines. */ |
| char *command_ptr; /* Ptr into command_lines[command_line]. */ |
| |
| unsigned int command_line; /* Index into command_lines. */ |
| |
| pid_t pid; /* Child process's ID number. */ |
| |
| unsigned int remote:1; /* Nonzero if executing remotely. */ |
| unsigned int noerror:1; /* Nonzero if commands contained a '-'. */ |
| unsigned int good_stdin:1; /* Nonzero if this child has a good stdin. */ |
| unsigned int deleted:1; /* Nonzero if targets have been deleted. */ |
| unsigned int recursive:1; /* Nonzero for recursive command ('+' etc.) */ |
| unsigned int jobslot:1; /* Nonzero if it's reserved a job slot. */ |
| unsigned int dontcare:1; /* Saved dontcare flag. */ |
| }; |
| |
| extern struct child *children; |
| |
| /* A signal handler for SIGCHLD, if needed. */ |
| void child_handler (int sig); |
| int is_bourne_compatible_shell(const char *path); |
| void new_job (struct file *file); |
| void reap_children (int block, int err); |
| void start_waiting_jobs (void); |
| void free_childbase (struct childbase* child); |
| |
| char **construct_command_argv (char *line, char **restp, struct file *file, |
| int cmd_flags, char** batch_file); |
| |
| pid_t child_execute_job (struct childbase *child, int good_stdin, char **argv); |
| |
| pid_t exec_command (char **argv, char **envp); |
| |
| void unblock_all_sigs (void); |
| |
| extern unsigned int job_slots_used; |
| extern unsigned int jobserver_tokens; |