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kernel+libc: Implement O_CLOEXEC

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This commit is contained in:
apio 2023-03-24 21:19:24 +01:00
parent d48d0efb07
commit 374a9ff7b8
Signed by: apio
GPG Key ID: B8A7D06E42258954
3 changed files with 8 additions and 3 deletions
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8
kernel/src/sys/exec.cpp
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@ -6,6 +6,7 @@
#include "thread/Scheduler.h"
#include "thread/ThreadImage.h"
#include <bits/modes.h>
#include <bits/open-flags.h>
#include <luna/CString.h>
#include <luna/ScopeGuard.h>
#include <luna/Vector.h>
@ -76,8 +77,11 @@ Result<u64> sys_exec(Registers* regs, SyscallArgs args)
guard.deactivate();
// FIXME: Close O_CLOEXEC file descriptors.
// for (int i = 0; i < FD_MAX; i++) { current->fd_table[i] = {}; }
for (int i = 0; i < FD_MAX; i++)
{
auto& descriptor = current->fd_table[i];
if (descriptor->flags & O_CLOEXEC) descriptor = {};
}
MMU::delete_userspace_page_directory(current->directory);

2
kernel/src/sys/open.cpp
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@ -7,7 +7,7 @@
#include <bits/open-flags.h>
// These flags are needed after open(), the rest only affect open().
constexpr int FLAGS_TO_KEEP = O_RDWR | O_APPEND | O_NONBLOCK;
constexpr int FLAGS_TO_KEEP = O_RDWR | O_APPEND | O_NONBLOCK | O_CLOEXEC;
Result<u64> sys_open(Registers*, SyscallArgs args)
{

1
libc/include/bits/open-flags.h
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@ -11,5 +11,6 @@
#define O_EXCL 16
#define O_TRUNC 32
#define O_NONBLOCK 64
#define O_CLOEXEC 128
#endif