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Kernel: Add some spec links and comments to sys$posix_fallocate()
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sideshowbarker
2024-07-17 03:57:59 +09:00
Author: https://github.com/awesomekling Commit: https://github.com/SerenityOS/serenity/commit/4277e2d58f Pull-request: https://github.com/SerenityOS/serenity/pull/16231 Reviewed-by: https://github.com/Hendiadyoin1 Reviewed-by: https://github.com/emanuele6 Reviewed-by: https://github.com/fdellwing Reviewed-by: https://github.com/skyrising Reviewed-by: https://github.com/supercomputer7 Reviewed-by: https://github.com/timschumi ✅
@ -12,11 +12,13 @@
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namespace Kernel {
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// https://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_fallocate.html
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ErrorOr<FlatPtr> Process::sys$posix_fallocate(int fd, Userspace<off_t const*> userspace_offset, Userspace<off_t const*> userspace_length)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this);
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TRY(require_promise(Pledge::stdio));
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// [EINVAL] The len argument is less than zero, or the offset argument is less than zero, or the underlying file system does not support this operation.
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auto offset = TRY(copy_typed_from_user(userspace_offset));
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if (offset < 0)
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return EINVAL;
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@ -31,9 +33,12 @@ ErrorOr<FlatPtr> Process::sys$posix_fallocate(int fd, Userspace<off_t const*> us
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return EFBIG;
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auto description = TRY(open_file_description(fd));
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// [EBADF] The fd argument references a file that was opened without write permission.
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if (!description->is_writable())
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return EBADF;
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// [ESPIPE] The fd argument is associated with a pipe or FIFO.
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if (description->is_fifo())
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return ESPIPE;
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