01-25-2013
Your code works fine for me under Solaris.
Maybe try cd ${1:-$PWD} instead.
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PWD(1) User Commands PWD(1)
NAME
pwd - print name of current/working directory
SYNOPSIS
pwd [OPTION]...
DESCRIPTION
Print the full filename of the current working directory.
-L, --logical
use PWD from environment, even if it contains symlinks
-P, --physical
avoid all symlinks
--help display this help and exit
--version
output version information and exit
If no option is specified, -P is assumed.
NOTE: your shell may have its own version of pwd, which usually supersedes the version described here. Please refer to your shell's docu-
mentation for details about the options it supports.
AUTHOR
Written by Jim Meyering.
REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report pwd 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
getcwd(3)
Full documentation at: <http://www.gnu.org/software/coreutils/pwd>
or available locally via: info '(coreutils) pwd invocation'
GNU coreutils 8.28 January 2018 PWD(1)