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creationix avatar creationix commented on May 23, 2024

luv is meant to be fairly low-level and not have much sugar like optional parameters. The wrapping in luvit does make it optional. https://github.com/luvit/luvit/blob/c274290954c5b23eccdac3fcabaf575dc2f2c633/app/modules/fs.lua#L142-L160

Also according to the man page for pwritev(2) (which is all the libuv docs for uv_fs_write mention), offset is the offset in the file being written to, not an offset in the source buffer.

The pwritev() system call combines the functionality of writev() and pwrite(2). It performs the same task as writev(), but adds a fourth argument, offset, which specifies the file offset at which the output operation is to be performed.

from luv.

zhaozg avatar zhaozg commented on May 23, 2024

Got it, thinks

from luv.

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