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Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
SET environment variables
First optional parameter:
; parameters are considered parts of a path variable, semicolons are
appended to each element if not already present
-D parameters are properties for Java or Makefile etc., -D will be
prepended and the parameters will be separated by a space
=D the same as above but equal sign is not required
, parameters should be comma separated in the environment variable
- parameters should be separated by the next parameter
Other values mean that the first parameter is missing and the environment
variable will be set to the space separated parameters
Second parameter: name of the environment variable
Next parameters: values
; implies that the equal sign is considered a part of the parameter and is
not interpreted
-D requires parameters in the form name=value. If the equal sign is not found,
the parameters are changed to name=expanded_name
Other options have optional equal sign. If it is found, only the part after
the equal sign will be oprionally expanded.
If the parameter is the minus sign, the next parameter will not be expanded.
If the parameter is a single dot, it will be replaced with the value of the
environment variable as it existed before envset was invoked.
For other parameters the batch looks for the environment variable with the
same name (in uppercase). If it is found, it forms the expanded_name. If
the environment variable with such a name does not exist, the expanded_name
will hold the parameter name without case conversion.
*/
parse arg mode envar args
equal = 0
sep = ' '
/* Parse command line parameters */
select
when mode='-' then do
sep = envar
parse var args envar args
end
when mode=';' then do
sep = ''
equal = -1
end
when mode='-D' then equal = 1
when mode='=D' then mode = '-D'
when mode=',' then sep = ','
otherwise
args = envar args
envar = mode
mode = ''
end
env = 'OS2ENVIRONMENT'
envar = translate(envar)
orig = value(envar,,env)
newval = ''
expand = 1
/* for each parameter... */
do i = 1 to words(args)
if expand > 0 & word(args, i) = '-' then expand = 0
else call addval word(args, i)
end
/* Optionally enclose path variable by quotes */
if mode = ';' & pos(' ', newval) > 0 then newval = '"' || newval || '"'
/* Set the new value, 'SET' cannot be used since it does not allow '=' */
x = value(envar, newval, env)
exit 0
addval: procedure expose sep equal orig expand newval mode env
parse arg var
if var = '.' then expvar = orig
else do
if equal >= 0 then do
parse var var name '=' val
if val = '' then var = name
else var = val
end
if expand = 0 then expvar = var
else expvar = value(translate(var),,env)
if expvar = '' then expvar = var
if equal >= 0 then do
if val = '' then do
parse var expvar key '=' val
if val <> '' then name = key
else do
if equal > 0 then val = key
else name = key
end
end
else val = expvar
if pos(' ', val) > 0 | pos('=', val) > 0 then val = '"' || val || '"'
if val = '' then expvar = name
else expvar = name || '=' || val
end
if mode = '-D' then expvar = '-D' || expvar
if mode = ';' then do
if right(expvar, 1) <> ';' then expvar = expvar || ';'
end
end
if newval = '' then newval = expvar
else newval = newval || sep || expvar
expand = 1
return
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