152 lines
3.8 KiB
C
152 lines
3.8 KiB
C
/*
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* This file is part of Jehanne.
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*
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* Copyright (C) 2017 Giacomo Tesio <giacomo@tesio.it>
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*
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* This is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, version 3 of the License.
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*
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* Jehanne is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Jehanne. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <u.h>
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#include <lib9.h>
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#include <posix.h>
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#include "internal.h"
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extern int *__libposix_errors_codes;
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extern WaitList **__libposix_wait_list;
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extern ChildList **__libposix_child_list;
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static int __initialized;
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static PosixProcessDisposer __libposix_process_dispose;
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int *__libposix_sigchld_father_pid;
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int *__libposix_sigchld_child_pid;
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int *__libposix_devsignal;
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int *__libposix_pid;
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static void
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libposix_check_configuration(void)
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{
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__libposix_errors_check_conf();
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__libposix_files_check_conf();
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__libposix_processes_check_conf();
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}
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void
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__libposix_sighelper_open(void)
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{
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int mypid;
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if(*__libposix_devsignal >= 0)
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close(*__libposix_devsignal);
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mypid = *__libposix_pid;
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*__libposix_devsignal = create("/dev/posix/signals", ORDWR|OCEXEC, mypid);
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if(*__libposix_devsignal < 0)
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sysfatal("cannot create /dev/posix/signals: %r");
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}
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void
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libposix_init(int argc, char *argv[], PosixInit init)
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{
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extern int main(int, char**);
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extern int *__handling_external_signal;
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extern int *__restart_syscall;
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extern PosixSignalMask *__libposix_signal_mask;
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WaitList *wait_list;
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ChildList *child_list;
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PosixSignalMask signal_mask;
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int mypid;
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int status;
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int error_codes[ERRNO_LAST-ERRNO_FIRST];
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int handling_signal;
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int sigchld_father_pid;
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int sigchld_child_pid;
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int restart_syscall;
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int devsignal;
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assert(__initialized == 0);
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mypid = getpid();
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__libposix_pid = &mypid;
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/* initialize PosixErrors map */
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memset(error_codes, 0, sizeof(error_codes));
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__libposix_errors_codes = error_codes;
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/* initialize wait_list; see also POSIX_fork and POSIX_exit */
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wait_list = nil;
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__libposix_wait_list = &wait_list;
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/* initialize child_list; used when SIGCHLD is enabled */
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child_list = nil;
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__libposix_child_list = &child_list;
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/* initialize signal handling */
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handling_signal = 0;
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sigchld_father_pid = 0;
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sigchld_child_pid = 0;
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signal_mask = 0;
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devsignal = -1;
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__libposix_devsignal = &devsignal;
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__restart_syscall = &restart_syscall;
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__handling_external_signal = &handling_signal;
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__libposix_sigchld_father_pid = &sigchld_father_pid;
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__libposix_sigchld_child_pid = &sigchld_child_pid;
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__libposix_signal_mask = &signal_mask;
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__libposix_reset_pending_signals();
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if(!atnotify(__libposix_note_handler, 1))
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sysfatal("libposix: atnotify");
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__libposix_sighelper_open();
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signal_mask = (PosixSignalMask)__libposix_sighelper_cmd(PHGetProcMask, 0);
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__libposix_init_signal_handlers();
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init(argc, argv);
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libposix_check_configuration();
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__initialized = 1;
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status = main(argc, argv);
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if(__libposix_process_dispose != nil)
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__libposix_process_dispose(status);
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POSIX_exit(status);
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}
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int
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libposix_on_process_disposition(PosixProcessDisposer dispose)
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{
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if(__libposix_process_dispose != nil)
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return 0;
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__libposix_process_dispose = dispose;
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return 1;
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}
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int
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__libposix_initialized(void)
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{
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return __initialized;
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}
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long
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__libposix_sighelper_cmd(PosixHelperCommand command, int posix_process_pid)
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{
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union {
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PosixHelperRequest request;
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long raw;
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} offset;
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offset.request.command = command;
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offset.request.target = posix_process_pid;
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return pwrite(*__libposix_devsignal, "", 0, offset.raw);
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}
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