/usr/lib/iraf/lib/clset.h is in iraf-dev 2.16.1+2018.03.10-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | # CLSET.H -- CLIO parameters. Here "CL" refers to the parent process, which
# is not necessarily the IRAF Command Language.
define CL_PRTYPE 1 # parent process type (see below)
define CL_PCACHE 2 # symtab descriptor of param cache
# Process type codes.
define PR_CONNECTED 1 # connected subprocess
define PR_DETACHED 2 # detached subprocess
define PR_HOST 3 # subprocess spawned by host
# Process interpreter mode codes (used by ONENTRY and the Iraf Main).
define PR_NOEXIT 0 # run interpreter in Iraf Main
define PR_EXIT 1 # skip interpreter, shutdown process
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