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Kernel: Make sure processes always start out with fds 0, 1 and 2 open.

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If we don't have a TTY for the process, fall back to /dev/null.
This commit is contained in:
Andreas Kling
2019-02-12 11:25:25 +01:00
parent 7def86c86d
commit 111589a558
5 changed files with 46 additions and 15 deletions
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12
Kernel/Process.cpp
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@@ -6,6 +6,7 @@
#include "system.h"
#include <Kernel/FileDescriptor.h>
#include <Kernel/VirtualFileSystem.h>
#include <Kernel/NullDevice.h>
#include "ELFLoader.h"
#include "MemoryManager.h"
#include "i8253.h"
@@ -623,12 +624,11 @@ Process::Process(String&& name, uid_t uid, gid_t gid, pid_t ppid, RingLevel ring
}
} else {
m_fds.resize(m_max_open_file_descriptors);
if (tty) {
int error;
m_fds[0].set(tty->open(error, O_RDONLY));
m_fds[1].set(tty->open(error, O_WRONLY));
m_fds[2].set(tty->open(error, O_WRONLY));
}
auto& device_to_use_as_tty = tty ? (CharacterDevice&)*tty : NullDevice::the();
int error;
m_fds[0].set(device_to_use_as_tty.open(error, O_RDONLY));
m_fds[1].set(device_to_use_as_tty.open(error, O_WRONLY));
m_fds[2].set(device_to_use_as_tty.open(error, O_WRONLY));
}
if (fork_parent)