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Kernel/LibC: Add initial pseudo terminal support

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This patch implements posix_openpt() and ptsname()

grantpt() and unlockpt() are left in LibC as stubs, as posix_openpt
currently does all of the needed work.
This commit is contained in:
Bananymous
2024-08-11 00:59:08 +03:00
parent ad645f31d0
commit a5a097fa4a
14 changed files with 335 additions and 43 deletions
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13
kernel/kernel/Terminal/Serial.cpp
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@@ -1,5 +1,4 @@
#include <BAN/Array.h>
#include <kernel/Device/DeviceNumbers.h>
#include <kernel/FS/DevFS/FileSystem.h>
#include <kernel/IDT.h>
#include <kernel/InterruptController.h>
@@ -7,7 +6,6 @@
#include <kernel/Terminal/Serial.h>
#include <ctype.h>
#include <sys/sysmacros.h>
#define MAX_BAUD 115200
@@ -33,6 +31,8 @@
namespace Kernel
{
static BAN::Atomic<uint32_t> s_next_tty_number = 0;
static constexpr uint16_t s_serial_ports[] = { 0x3F8, 0x2F8, 0x3E8, 0x2E8, 0x5F8, 0x4F8, 0x5E8, 0x4E8 };
static BAN::Array<Serial, sizeof(s_serial_ports) / sizeof(*s_serial_ports)> s_serial_drivers;
static bool s_has_devices { false };
@@ -40,12 +40,6 @@ namespace Kernel
static BAN::RefPtr<SerialTTY> s_com1;
static BAN::RefPtr<SerialTTY> s_com2;
static dev_t next_rdev()
{
static dev_t minor = 0;
return makedev(DeviceNumber::Serial, minor++);
}
void Serial::initialize()
{
int count = 0;
@@ -179,9 +173,8 @@ namespace Kernel
SerialTTY::SerialTTY(Serial serial)
: TTY(0600, 0, 0)
, m_name(MUST(BAN::String::formatted("ttyS{}", minor(rdev()))))
, m_name(MUST(BAN::String::formatted("ttyS{}", s_next_tty_number++)))
, m_serial(serial)
, m_rdev(next_rdev())
{}
BAN::ErrorOr<BAN::RefPtr<SerialTTY>> SerialTTY::create(Serial serial)