db7182ddc3
This change refactors the process group implementation and adds support for sessions. The setsid(2) and getsid(2) system calls were added. psctl(2) now has PSCTL_TTYNAME, which lets you get the name of a process's terminal, and ps(1) now uses it. The initial terminal is now called /dev/tty1. /dev/tty is now a factory for the current terminal. A global lock now protects the process hierarchy which makes it safe to access other processes. This refactor removes potential vulnerabilities and increases system robustness. A number of terminal ioctls have been added. This is a compatible ABI change.
117 lines
3.3 KiB
C++
117 lines
3.3 KiB
C++
/*
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* Copyright (c) 2012, 2014, 2015, 2016 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* tty.h
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* Terminal line discipline.
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*/
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#ifndef SORTIX_TTY_H
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#define SORTIX_TTY_H
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#include <string.h>
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#include <wchar.h>
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#if !defined(TTY_NAME_MAX)
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#include <sortix/limits.h>
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#endif
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#include <sortix/termios.h>
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#include <sortix/kernel/kthread.h>
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#include <sortix/kernel/inode.h>
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#include <sortix/kernel/keyboard.h>
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#include <sortix/kernel/poll.h>
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#include "kb/kblayout.h"
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#include "linebuffer.h"
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namespace Sortix {
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class DevTTY : public AbstractInode
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{
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public:
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DevTTY(dev_t dev, mode_t mode, uid_t owner, gid_t group);
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virtual ~DevTTY();
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public:
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virtual Ref<Inode> factory(ioctx_t* ctx, const char* filename, int flags,
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mode_t mode);
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};
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class TTY : public AbstractInode
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{
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public:
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TTY(dev_t dev, ino_t ino, mode_t mode, uid_t owner, gid_t group,
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const char* name);
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virtual ~TTY();
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public:
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virtual ssize_t read(ioctx_t* ctx, uint8_t* buf, size_t count);
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virtual ssize_t write(ioctx_t* ctx, const uint8_t* buf, size_t count);
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virtual int tcgetwincurpos(ioctx_t* ctx, struct wincurpos* wcp);
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virtual int tcsetpgrp(ioctx_t* ctx, pid_t pgid);
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virtual pid_t tcgetpgrp(ioctx_t* ctx);
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virtual int settermmode(ioctx_t* ctx, unsigned termmode);
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virtual int gettermmode(ioctx_t* ctx, unsigned* termmode);
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virtual int poll(ioctx_t* ctx, PollNode* node);
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virtual int tcdrain(ioctx_t* ctx);
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virtual int tcflow(ioctx_t* ctx, int action);
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virtual int tcflush(ioctx_t* ctx, int queue_selector);
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virtual int tcgetattr(ioctx_t* ctx, struct termios* tio);
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virtual pid_t tcgetsid(ioctx_t* ctx);
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virtual int tcsendbreak(ioctx_t* ctx, int duration);
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virtual int tcsetattr(ioctx_t* ctx, int actions, const struct termios* tio);
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virtual int ioctl(ioctx_t* ctx, int cmd, uintptr_t arg);
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public:
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void hup();
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protected:
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void tty_output(const char* str)
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{
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tty_output((const unsigned char*) str, strlen(str));
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}
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virtual void tty_output(const unsigned char* buffer, size_t length) = 0;
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protected:
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void ProcessUnicode(uint32_t unicode);
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void ProcessByte(unsigned char byte, uint32_t control_unicode = 0);
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void CommitLineBuffer();
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short PollEventStatus();
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bool CheckForeground();
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bool RequireForeground(int sig);
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bool RequireForegroundUnlocked(int sig);
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bool CheckHandledByte(tcflag_t lflags, unsigned char key, unsigned char byte);
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protected:
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PollChannel poll_channel;
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kthread_mutex_t termlock;
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kthread_cond_t datacond;
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mbstate_t read_ps;
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size_t numeofs;
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LineBuffer linebuffer;
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struct termios tio;
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pid_t foreground_pgid;
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pid_t sid;
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bool hungup;
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char ttyname[TTY_NAME_MAX-5+1];
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};
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} // namespace Sortix
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#endif
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