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Add ioctl() and reimplement tcsetpgrp/tcsetpgrp as ioctls.

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This commit is contained in:
Andreas Kling 2018-11-16 13:11:21 +01:00
parent 2529925fe9
commit c99f8af66d
16 changed files with 94 additions and 45 deletions
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27
Kernel/Process.cpp
View file

@ -1586,35 +1586,14 @@ int Process::sys$tcsetattr(int fd, int optional_actions, const Unix::termios* tp
return 0;
}
pid_t Process::sys$tcgetpgrp(int fd)
int Process::sys$ioctl(int fd, unsigned request, unsigned arg)
{
auto* descriptor = file_descriptor(fd);
if (!descriptor)
return -EBADF;
if (!descriptor->isTTY())
if (!descriptor->is_character_device())
return -ENOTTY;
auto& tty = *descriptor->tty();
if (&tty != m_tty)
return -ENOTTY;
return tty.pgid();
}
int Process::sys$tcsetpgrp(int fd, pid_t pgid)
{
if (pgid < 0)
return -EINVAL;
if (get_sid_from_pgid(pgid) != m_sid)
return -EINVAL;
auto* descriptor = file_descriptor(fd);
if (!descriptor)
return -EBADF;
if (!descriptor->isTTY())
return -ENOTTY;
auto& tty = *descriptor->tty();
if (&tty != m_tty)
return -ENOTTY;
tty.set_pgid(pgid);
return 0;
return descriptor->character_device()->ioctl(*this, request, arg);
}
int Process::sys$getdtablesize()

3
Kernel/Process.h
View file

@ -118,8 +118,6 @@ public:
int sys$setpgid(pid_t pid, pid_t pgid);
pid_t sys$getpgrp();
pid_t sys$getpgid(pid_t);
pid_t sys$tcgetpgrp(int fd);
int sys$tcsetpgrp(int fd, pid_t pgid);
uid_t sys$getuid();
gid_t sys$getgid();
uid_t sys$geteuid();
@ -175,6 +173,7 @@ public:
int sys$fcntl(int fd, int cmd, dword extra_arg);
int sys$tcgetattr(int fd, Unix::termios*);
int sys$tcsetattr(int fd, int optional_actions, const Unix::termios*);
int sys$ioctl(int fd, unsigned request, unsigned arg);
static void initialize();

6
Kernel/Syscall.cpp
View file

@ -125,10 +125,6 @@ static DWORD handle(RegisterDump& regs, DWORD function, DWORD arg1, DWORD arg2,
return current->sys$getpgid((pid_t)arg1);
case Syscall::SC_getpgrp:
return current->sys$getpgrp();
case Syscall::SC_tcgetpgrp:
return current->sys$tcgetpgrp((int)arg1);
case Syscall::SC_tcsetpgrp:
return current->sys$tcsetpgrp((int)arg1, (pid_t)arg2);
case Syscall::SC_fork:
return current->sys$fork(regs);
case Syscall::SC_execve:
@ -179,6 +175,8 @@ static DWORD handle(RegisterDump& regs, DWORD function, DWORD arg1, DWORD arg2,
return current->sys$tcgetattr((int)arg1, (Unix::termios*)arg2);
case Syscall::SC_tcsetattr:
return current->sys$tcsetattr((int)arg1, (int)arg2, (const Unix::termios*)arg3);
case Syscall::SC_ioctl:
return current->sys$ioctl((int)arg1, (unsigned)arg2, (unsigned)arg3);
default:
kprintf("<%u> int0x80: Unknown function %x requested {%x, %x, %x}\n", current->pid(), function, arg1, arg2, arg3);
break;

11
Kernel/Syscall.h
View file

@ -37,8 +37,6 @@
__ENUMERATE_SYSCALL(getpgid) \
__ENUMERATE_SYSCALL(setpgid) \
__ENUMERATE_SYSCALL(getpgrp) \
__ENUMERATE_SYSCALL(tcsetpgrp) \
__ENUMERATE_SYSCALL(tcgetpgrp) \
__ENUMERATE_SYSCALL(fork) \
__ENUMERATE_SYSCALL(execve) \
__ENUMERATE_SYSCALL(geteuid) \
@ -66,6 +64,7 @@
__ENUMERATE_SYSCALL(fcntl) \
__ENUMERATE_SYSCALL(tcsetattr) \
__ENUMERATE_SYSCALL(tcgetattr) \
__ENUMERATE_SYSCALL(ioctl) \
#define DO_SYSCALL_A0(function) Syscall::invoke((dword)(function))
@ -104,28 +103,28 @@ struct SC_mmap_params {
void initialize();
inline dword invoke(dword function)
inline dword invoke(Function function)
{
dword result;
asm volatile("int $0x80":"=a"(result):"a"(function):"memory");
return result;
}
inline dword invoke(dword function, dword arg1)
inline dword invoke(Function function, dword arg1)
{
dword result;
asm volatile("int $0x80":"=a"(result):"a"(function),"d"(arg1):"memory");
return result;
}
inline dword invoke(dword function, dword arg1, dword arg2)
inline dword invoke(Function function, dword arg1, dword arg2)
{
dword result;
asm volatile("int $0x80":"=a"(result):"a"(function),"d"(arg1),"c"(arg2):"memory");
return result;
}
inline dword invoke(dword function, dword arg1, dword arg2, dword arg3)
inline dword invoke(Function function, dword arg1, dword arg2, dword arg3)
{
dword result;
asm volatile("int $0x80":"=a"(result):"a"(function),"d"(arg1),"c"(arg2),"b"(arg3):"memory");

21
Kernel/TTY.cpp
View file

@ -1,6 +1,8 @@
#include "TTY.h"
#include "Process.h"
#include <LibC/errno_numbers.h>
#include <LibC/signal_numbers.h>
#include <LibC/sys/ioctl_numbers.h>
TTY::TTY(unsigned major, unsigned minor)
: CharacterDevice(major, minor)
@ -66,3 +68,22 @@ void TTY::set_termios(const Unix::termios& t)
should_echo_input(),
should_generate_signals());
}
int TTY::ioctl(Process& process, unsigned request, unsigned arg)
{
if (process.tty() != this)
return -ENOTTY;
switch (request) {
case TIOCGPGRP:
return pgid();
case TIOCSPGRP: {
// FIXME: Validate pgid fully.
pid_t pgid = static_cast<pid_t>(arg);
if (pgid < 0)
return -EINVAL;
set_pgid(arg);
return 0;
}
}
return -EINVAL;
}

3
Kernel/TTY.h
View file

@ -3,6 +3,8 @@
#include <VirtualFileSystem/CharacterDevice.h>
#include <VirtualFileSystem/UnixTypes.h>
class Process;
class TTY : public CharacterDevice {
public:
virtual ~TTY() override;
@ -10,6 +12,7 @@ public:
virtual ssize_t read(byte*, size_t) override;
virtual ssize_t write(const byte*, size_t) override;
virtual bool hasDataAvailableForRead() const override;
virtual int ioctl(Process&, unsigned request, unsigned arg) override final;
virtual String ttyName() const = 0;