Qshell Interpreter (qsh) - FTP Directory Listing - IBM

Word expansions
Tilde expansion
Parameter expansion
16 Qshell Interpreter (qsh)
QSH_USE_PRESTART_JOBS (Use pre-start jobs when available)
This variable determines if processes started by qsh use prestart jobs when
available. When the value of the variable is Y, qsh uses prestart jobs if they
are available in the current subsystem. When the value of the variable is
not Y or prestart jobs are not available, the processes started by qsh are
batch immediate jobs. The default value is Y.
QSH_REDIRECTION_CODEPAGE (Set code page for file redirection)
When this variable is set to a numeric value, qsh opens files specified on
redirections in the specified code page. By default, the variable is not set
and files are opened in the code page associated with the job.
QSH_REDIRECTION_TEXTDATA (Process data as text for file redirection)
This variable determines if data read from or written to a file specified on a
redirection is treated as text data or binary data. When the value of the
variable is Y, qsh treats the data read from or written to the file as text data.
When the value of the variable is not Y, qsh treats the data read from or
written to the file as binary data. The default value is Y.
SHELL (Path name of the shell)
When running a script file that does not contain “#!”, qsh uses the value of
this variable as the path name of the shell interpreter to run the script.
There is no default value.
[ Legal | AS/400 Glossary ]
An unquoted tilde character (x) at the beginning of a word is expanded to the user’s
home directory. All the characters up to a slash (/) or the end of the word are
treated as a user name and are replaced with the user’s home directory. If the user
name is not present (as in x/foobar), the tilde is replaced with the value of the
HOME variable (the current user’s home directory).
The format for parameter expansion is as follows:
${expression}
where expression consists of all characters until the matching right brace (}). Any
right brace characters escaped by a backslash or within a quoted string, and
characters in embedded arithmetic expansions, command substitutions, and
variable expansions, are not examined in determining the matching right brace.
The simplest form for parameter expansion is:
${parameter}
The value, if any, of parameter is substituted. The parameter name or symbol can
be enclosed in braces, which are optional except for positional parameters with
more than one digit or when parameter is followed by a character that could be
interpreted as part of the name. If a parameter expansion occurs inside
double-quotes, then: