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- /* Fork a Unix child process, and set up to debug it, for GDBserver.
- Copyright (C) 1989-2022 Free Software Foundation, Inc.
- This file is part of GDB.
- This program 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.
- This program 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 <http://www.gnu.org/licenses/>. */
- #include "server.h"
- #include "gdbsupport/job-control.h"
- #include "nat/fork-inferior.h"
- #ifdef HAVE_SIGNAL_H
- #include <signal.h>
- #endif
- #ifdef SIGTTOU
- /* A file descriptor for the controlling terminal. */
- static int terminal_fd;
- /* TERMINAL_FD's original foreground group. */
- static pid_t old_foreground_pgrp;
- /* Hand back terminal ownership to the original foreground group. */
- static void
- restore_old_foreground_pgrp (void)
- {
- tcsetpgrp (terminal_fd, old_foreground_pgrp);
- }
- #endif
- /* See nat/fork-inferior.h. */
- void
- prefork_hook (const char *args)
- {
- client_state &cs = get_client_state ();
- threads_debug_printf ("args: %s", args);
- #ifdef SIGTTOU
- signal (SIGTTOU, SIG_DFL);
- signal (SIGTTIN, SIG_DFL);
- #endif
- /* Clear this so the backend doesn't get confused, thinking
- CONT_THREAD died, and it needs to resume all threads. */
- cs.cont_thread = null_ptid;
- }
- /* See nat/fork-inferior.h. */
- void
- postfork_hook (pid_t pid)
- {
- }
- /* See nat/fork-inferior.h. */
- void
- postfork_child_hook ()
- {
- /* This is set to the result of setpgrp, which if vforked, will be
- visible to you in the parent process. It's only used by humans
- for debugging. */
- static int debug_setpgrp = 657473;
- debug_setpgrp = gdb_setpgid ();
- if (debug_setpgrp == -1)
- perror (_("setpgrp failed in child"));
- }
- /* See nat/fork-inferior.h. */
- void
- gdb_flush_out_err ()
- {
- fflush (stdout);
- fflush (stderr);
- }
- /* See server.h. */
- void
- post_fork_inferior (int pid, const char *program)
- {
- client_state &cs = get_client_state ();
- #ifdef SIGTTOU
- signal (SIGTTOU, SIG_IGN);
- signal (SIGTTIN, SIG_IGN);
- terminal_fd = fileno (stderr);
- old_foreground_pgrp = tcgetpgrp (terminal_fd);
- tcsetpgrp (terminal_fd, pid);
- atexit (restore_old_foreground_pgrp);
- #endif
- startup_inferior (the_target, pid,
- START_INFERIOR_TRAPS_EXPECTED,
- &cs.last_status, &cs.last_ptid);
- current_thread->last_resume_kind = resume_stop;
- current_thread->last_status = cs.last_status;
- signal_pid = pid;
- target_post_create_inferior ();
- fprintf (stderr, "Process %s created; pid = %d\n", program, pid);
- fflush (stderr);
- }
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