ksh.1 (2010 09)

k
ksh(1) ksh(1)
FCEDIT The default editor name for the
fc command.
FPATH The search path for function definitions. This path is searched when a function
with the -u attribute is referenced and when a command is not found. If an exe-
cutable file is found, then it is read and executed in the current environment.
IFS Internal field separators, normally space , tab, and newline that are used to
separate command words resulting from command or parameter substitution, and
for separating words with the special command
read
. The first character of the
IFS parameter is used to separate arguments for the
"$*" substitution (see Quot-
ing below).
HISTFILE If this parameter is set when the shell is invoked, its value is the path name of the
file that is used to store the command history. The default value is
$HOME/.sh_history
. If the user has appropriate privileges and no
HISTFILE
is given, then no history file is used (see Command Re-entry below).
HISTSIZE If this parameter is set when the shell is invoked, the number of previously entered
commands accessible to this shell will be greater than or equal to this number. The
default is 128.
HOME The default argument (home directory) for the
cd command.
MAIL If this parameter is set to the name of a mail file and the MAILPATH
parameter is
not set, the shell informs the user of arrival of mail in the specified file.
MAILCHECK This variable specifies how often (in seconds) the shell checks for changes in the
modification time of any of the files specified by the
MAILPATH
or MAIL parame-
ters. The default value is
600 seconds. When the time has elapsed the shell
checks before issuing the next prompt.
MAILPATH A list of file names separated by colons (:). If this parameter is set, the shell
informs the user of any modifications to the specified files that have occurred within
the last MAILCHECK seconds. Each file name can be followed by a ? and a mes-
sage to be printed, in which case the message undergoes parameter and command
substitution with the parameter $_ defined as the name of the changed file. The
default message is you have mail in $_.
PATH The search path for commands (see Execution below). The user cannot change
PATH if executing rksh (except in the .profile file).
PS1 The value of this parameter is expanded for parameter substitution, to define the
primary prompt string which, by default, is $ followed by a space character. The
character ! in the primary prompt string is replaced by the command number (see
Command Re-entry below). To include a ! in the prompt, use !!.
PS2 Secondary prompt string, by default > followed by a space character.
PS3 Selection prompt string used within a select loop, by default #? followed by a
space character.
PS4 The value of this variable is expanded for parameter substitution and precedes each
line of an execution trace. If PS4 is unset, the execution trace prompt is + followed
by a space character.
SHELL The path name of the shell is kept in the environment. When invoked, the shell is
restricted if the value of this variable contains an r in the basename.
TMOUT If set to a value greater than zero, the shell terminates if a command is not entered
within the prescribed number of seconds after issuing the PS1 prompt.
VISUAL Invokes the corresponding option when the value of this variable ends in emacs ,
gmacs,orvi (see set in Special Commands below).
The shell gives default values to
PATH, PS1, PS2, MAILCHECK, TMOUT, and IFS. HOME, SHELL, ENV,
and MAIL are never set automatically by the shell (although HOME, SHELL, and MAIL are set by
login(1)).
Blank Interpretation
After parameter and command substitution, the results of substitution are scanned for field separator
characters (found in
IFS), and split into distinct arguments where such characters are found. ksh
6 Hewlett-Packard Company − 6 − HP-UX 11i Version 3: September 2010