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

Table 28. Built-in Shell Variables (sh command) (continued)
Variable Purpose
FPATH Contains a list of directories that the system searches to find
executable functions. Directories in this list are separated with
colons. sh searches each directory in the order specified in the list
until it finds a matching function. If you want the shell to search the
working directory, put a dot (.) or a null string in the list of
directories (for example, to tell the shell to search the working
directory first, start the list with a colon or semicolon).
HISTFILE Contains the pathname of a file to be used as the history file. When
the shell starts, the value of this variable overrides the default
history file.
HISTSIZE Contains the maximum number of commands that the shell keeps
in the history file. If this variable contains a valid number when the
shell starts, it overrides the default of 127.
HOME Contains your home directory.This is also the default directory for
the cd command. The HOME variable is set automatically from the
RACF user profile when the user logs in.
IFS Contains a series of characters to be used as internal field
separatorcharacters. Any of these characters can separate
arguments in unquoted command substitutions such as `command`
or $(command), or in parameter substitutions. In addition, the shell
uses these characters to separate values put into variables with the
read command. Finally, the first character in the value of IFS
separates the positional parameters in $* expansion. By default,
IFS contains space, tab, and newline.
LANG Contains the default locale value.
LIBPATH Used to specify the directory to search for a DLL (Dynamic Link
Library) filename. If it is not set, the working directory is searched.
For more information, see dlload in z/OS XL C/C++ Run-Time
Library Reference.
LIBPATH can be updated by the _CEE_ENVFILE or
_CEE_ENVFILE_S environment variables. For more information on
_CEE_ENVFILE, see the z/OS XL C/C++ Programming Guide.
LINENO Contains the number of the line currently being run by a shell script
or within a function.
LINES Used by several commands to define the number of lines on the
terminal output device.
LOCPATH Tells the setlocale() function the name of the directory in the z/OS
UNIX file system from which to load locale object files. (localedef
produces locale object files by processing locale source files.)
LOGNAME Contains the user login name. This is set automatically from the
RACF user profile when the user logs in.
MAILCHECK Contains the number of seconds of elapsed time that must pass
before the system checks for mail; the default value is 600
seconds. When using the MAIL or MAILPATH variables, the shell
checks for mail before issuing a prompt.
sh
Chapter 2. Shell command descriptions 571