z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

Limits
Portability
Word after ... expanded to more than one argument
In a context where only one argument was expected, a construct expanded
to more than one argument.
The maximum length of an executable filename, including subdirectories and
extensions, is 1023 bytes.
POSIX.2, X/Open Portability Guide.
The construct $[arithmetic expression] is an extension of the POSIX standard.
Related Information
alias, break, cd, continue, dot, echo, eval, exec, exit, export, fc, getopts, let,
print, ps, pwd, read, readonly, return, set, shift, test, time, trap, true, typeset,
ulimit, unalias, unset, whence. shedit
Appendix I also explains how to set the local time zone with the TZ environment
variable.
shedit — Interactive command and history editing in the shell
Format
Usage notes
set –o editmode
EDITOR=editprog
VISUAL= editprog
POSIX uses a number of keys for such things as erase and kill processing. By
default, the shell leaves command-line editing to POSIX, using these familiar editing
keys. However, these functions are not particularly powerful or friendly. As an
alternative, the shell has built-in facilities for interactive command editing and file
name generation that not only aid in composing new commands but also make it
easy for you to modify and re-execute previous commands. This capability is
distinct from that provided by the fc command, which passes previous command
lines to a separate program for editing. The built-in facilities mimic the emacs,
gmacs, or vi screen editors, and enable the following commands (see set and vi
for details).
set –o emacs
set –o gmacs
set –o vi
These facilities are also enabled (with the corresponding option set) by assigning a
value ending in vi to the environment variables EDITOR or VISUAL. (See sh.)
Unlike full-screen editors, shell editing uses a one-line window, extending from the
end of the prompt to the next-to-last column. Multiline history entries are displayed
with newlines represented as ^J.
The number of columns on the output device is obtained from the COLUMNS
environment variable if defined; otherwise, it is assumed to be 80.
sh
Chapter 2. Shell command descriptions 577