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Kernel: Support F_DUPFD_CLOEXEC command to fcntl(2)
Specified by POSIX: https://pubs.opengroup.org/onlinepubs/9699919799/functions/fcntl.html
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2 changed files with 3 additions and 1 deletions
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@ -19,13 +19,14 @@ ErrorOr<FlatPtr> Process::sys$fcntl(int fd, int cmd, uintptr_t arg)
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// NOTE: The FD flags are not shared between OpenFileDescription objects.
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// This means that dup() doesn't copy the FD_CLOEXEC flag!
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switch (cmd) {
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case F_DUPFD_CLOEXEC:
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case F_DUPFD: {
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int arg_fd = (int)arg;
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if (arg_fd < 0)
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return EINVAL;
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return m_fds.with_exclusive([&](auto& fds) -> ErrorOr<FlatPtr> {
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auto fd_allocation = TRY(fds.allocate(arg_fd));
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fds[fd_allocation.fd].set(*description);
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fds[fd_allocation.fd].set(*description, (cmd == F_DUPFD_CLOEXEC) ? FD_CLOEXEC : 0);
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return fd_allocation.fd;
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});
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}
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