This command creates a shell variable, assigns it a value,
and specifies certain attributes for the variable, such as integer
and read-only.
The syntax is:
set typeset [-HLRZfilprtux[n]
[name [=value]]...]
where name is the shell variable
to be created, value is to be assigned
according to the options set.
The following example makes year
read-only.
$ typeset -r year=2000
$ echo $year
$ year=2001
ksh: year: is readonly |
The following list of attributes may be specified by the designated
option or flag:
- -F
This flag provides UNIX to host name file mapping on non-UNIX
machines.
- -L
Left justify and remove leading blanks from value.
If n is nonzero it defines the width
of the field, otherwise it is determined by the width of the value
of first assignment. When the parameter receives a value, it is
filled on the right with blanks or truncated to fit into the field.
Leading zeros are removed if the -Z
flag is also set. This turns the -R
flag off.
- -R
Right justify and fill with leading blanks. If n
is nonzero it defines the width of the field, otherwise it is determined
by the width of the value of first assignment. The field is left
filled with blanks or truncated from the end if the parameter is
reassigned. This turns the L
flag off.
- -Z
Right justify and fill with leading zeros if the
first nonblank character is a digit and the -L
flag has not been set. If n is nonzero
it defines the width of the field, otherwise it is determined by
the width of the value of first assignment.
- -e
Tag the parameter as having an error. This tag is
currently unused by the shell and can be set or cleared by the user.
- -f
The names refer to function names rather than parameter
names. No assignments can be made and the only other valid flag
is -x.
- -i
The name is an integer.
This makes arithmetic faster. If n is
nonzero it defines the output arithmetic base, otherwise the first
assignment determines the output base.
- -l
All uppercase characters converted to lowercase.
The uppercase flag, -u
is turned off.
- -p
The output of this command, if any, is written onto
the two-way pipe.
- -r
The given names are marked read-only and these names
cannot be changed by subsequent assignment.
- -t
Tags the name. Tags are
user definable and have no special meaning to the shell.
- -u
All lowercase characters are converted to uppercase
characters. This turns the lowercase flag, -l,
off.
- -x
The given names are marked
for automatic export to the environment of subsequently executed
commands.
Using +
rather than -
causes these flags to be turned off. If no name
arguments are given but flags are specified, a list of names
(and optionally the values) of the parameters
which have these flags set is printed. (Using +
rather than -
keeps the values to be printed.) If no names
and options are given, the names and
attributes of all parameters are printed.
The following example covers some of the attributes set above:
$ typeset -i arg1=3 arg2=22
$ echo $arg1 $arg2
3 22
$ typeset
...
export PATH
readonly year
integer arg2
integer arg1
...
$ typeset -u up=letters
$ echo $up
LETTERS |
Printable version
