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Top Forums Shell Programming and Scripting ksh "typeset -i" and Empty Parameters Post 302804435 by Matt Miller on Wednesday 8th of May 2013 02:54:24 PM
Old 05-08-2013
ksh "typeset -i" and Empty Parameters

I'm getting different behaviors for "typeset -i" on different systems. In one case unset parameters are 0, and in another case they're empty. Is one of these behaviors correct, or is the behavior here unspecified?

First system:
Code:
$ typeset -i x
$ print $x
0
$ print ${.sh.version}
Version M 93t+ 2009-05-01
$ uname
AIX
$ oslevel -s
7100-01-05-1228

Second system:
Code:
$ typeset -i x
$ print $x

$ print ${.sh.version}
Version M-12/28/93e
$ uname
AIX
$ oslevel -s
6100-04-11-1140

 

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UNAME(1)							   User Commands							  UNAME(1)

NAME
uname - print system information SYNOPSIS
uname [OPTION]... DESCRIPTION
Print certain system information. With no OPTION, same as -s. -a, --all print all information, in the following order, except omit -p and -i if unknown: -s, --kernel-name print the kernel name -n, --nodename print the network node hostname -r, --kernel-release print the kernel release -v, --kernel-version print the kernel version -m, --machine print the machine hardware name -p, --processor print the processor type (non-portable) -i, --hardware-platform print the hardware platform (non-portable) -o, --operating-system print the operating system --help display this help and exit --version output version information and exit AUTHOR
Written by David MacKenzie. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report uname translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
arch(1), uname(2) Full documentation at: <http://www.gnu.org/software/coreutils/uname> or available locally via: info '(coreutils) uname invocation' GNU coreutils 8.28 January 2018 UNAME(1)
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