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Kernel: Add support for O_NONBLOCK in pipe syscall

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While working on a port, I saw a pipe creation fail due to missing
nonblock support in pipe syscall.
This commit is contained in:
Eric Seifert 2021-09-18 19:39:00 -07:00 committed by Andreas Kling
parent 2e079c6d69
commit edbc5489a8
Notes: sideshowbarker 2024-07-18 03:41:13 +09:00 
Author: https://github.com/seiferteric 🔰
Commit: https://github.com/SerenityOS/serenity/commit/edbc5489a88
Pull-request: https://github.com/SerenityOS/serenity/pull/10135
1 changed files with 6 additions and 2 deletions
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8
Kernel/Syscalls/pipe.cpp
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@ -15,8 +15,8 @@ KResultOr<FlatPtr> Process::sys$pipe(int pipefd[2], int flags)
REQUIRE_PROMISE(stdio);
if (fds().open_count() + 2 > fds().max_open())
return EMFILE;
// Reject flags other than O_CLOEXEC.
if ((flags & O_CLOEXEC) != flags)
// Reject flags other than O_CLOEXEC, O_NONBLOCK
if ((flags & (O_CLOEXEC | O_NONBLOCK)) != flags)
return EINVAL;
u32 fd_flags = (flags & O_CLOEXEC) ? FD_CLOEXEC : 0;
@ -30,6 +30,10 @@ KResultOr<FlatPtr> Process::sys$pipe(int pipefd[2], int flags)
reader_description->set_readable(true);
writer_description->set_writable(true);
if (flags & O_NONBLOCK) {
reader_description->set_blocking(false);
writer_description->set_blocking(false);
}
m_fds[reader_fd_allocation.fd].set(move(reader_description), fd_flags);
m_fds[writer_fd_allocation.fd].set(move(writer_description), fd_flags);