plan9 man page for dup

Query: dup

OS: plan9

Section: 3

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

DUP(3)							     Library Functions Manual							    DUP(3)

NAME
dup - dups of open files
SYNOPSIS
bind #d /fd /fd/0 /fd/1 ...
DESCRIPTION
The dup device serves a one-level directory containing files whose names are decimal numbers. A file of name n corresponds to open file descriptor n in the current process. An open(2) of file n results in a file descriptor identical to what would be returned from a system call dup(n, -1). Note that the result is no longer a file in the dup device. The stat operation returns information about the device file, not the open file it points to. A stat of #d/n will contain n for the name, 0 for the length, and 0400, 0200, or 0600 for the mode, depending on whether the dup target is open for reading, writing, or both.
SEE ALSO
dup(2)
SOURCE
/sys/src/9/port/devdup.c DUP(3)
Related Man Pages
dup2(2) - mojave
dup(2) - mojave
dup(2) - opensolaris
dup(2) - redhat
dup(2) - freebsd
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