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Top Forums Shell Programming and Scripting Not able to assign 0 (zero) to the existing variable Post 302849373 by wisecracker on Sunday 1st of September 2013 04:42:15 AM
Old 09-01-2013
Hi newbie2100...

If you are not sure try experimenting longhand first, it aids me in understanding what is going on inside the shell...
(Note:- I usually try to stay as basic as possible until I do understand.)

Hope this helps:-
Code:
Last login: Sun Sep  1 09:32:06 on ttys000
AMIGA:barrywalker~> # A null character...
AMIGA:barrywalker~> WHTP=""
AMIGA:barrywalker~> echo "$WHTP"

AMIGA:barrywalker~> # A character zero...
AMIGA:barrywalker~> WHTP="0"
AMIGA:barrywalker~> echo "$WHTP"
0
AMIGA:barrywalker~> # This is an error with or without spaces...
AMIGA:barrywalker~> $WHTP=0
-bash: 0=0: command not found
AMIGA:barrywalker~> # It should be...
AMIGA:barrywalker~> WHTP=0
AMIGA:barrywalker~> echo "$WHTP"
0
AMIGA:barrywalker~> # Hope this helps...

 

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pset_assign_pid(1)					      General Commands Manual						pset_assign_pid(1)

NAME
pset_assign_pid - Assigns a process ID to a processor set SYNOPSIS
/usr/sbin/pset_assign_pid [-x] pset_id pid [pid...] OPTIONS
Assigns exclusive use of the target processor set to each specified process identification number. DESCRIPTION
The pset_assign_pid command assigns one or more process identification numbers to an existing processor set. The pset_id variable is a unique integer that identifies the processor set and is returned by the pset_create command. The pid variable is the process identification number, which is a unique integer that identifies the process. Each process identification number that is assigned is removed from its cur- rent processor set. Use the -x option to assign exclusive use of the processor set. If the processor set is already in use, a message is displayed, and the command terminates without performing the assignment. If the exclusive assignment succeeds, new requests by other processes for assign- ments to the specified processor set (pset_id) are denied. SEE ALSO
Commands: pset_destroy(1), pset_create(1), pset_assign_cpu(1), pset_info(1) Files: processor_sets(4) pset_assign_pid(1)
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