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In the bash manual, opening an arbitrary file descriptor is described as:

/dev/fd/fd

If fd is a valid integer, file descriptor fd is duplicated.

Does this mean /dev/fd/123, or dev/123/fd, or /dev/123/123?

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1 Answer 1

up vote 1 down vote accepted

As per the DEVFS definitions, the correct location is /dev/fd/NNN. Note that using descriptors above 9 may cause problems as Bash uses some for its internal use. Permissions should also be respected.

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