| .ENVIRON Statement Details. |
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| ENVIRON Statement Details |
|
| Syntax |
| ENVIRON stringexpression |
| |
| The stringexpression must be of the form |
| parameterid=text |
| or the form |
| parameterid text |
| |
| Everything to the left of the equal sign or space is assumed to be a |
| parameter, and everything to the right, text. |
| |
| If the parameterid has not previously existed in the environment- |
| string table, it is appended to the end of the table. If a parameterid |
| exists in the table when the ENVIRON statement is executed, it is |
| deleted and the new parameterid is appended to the end of the table. |
| |
| The text string is the new parameter text. If the text is a null |
| string ("") or a semi-colon (";"), then the existing parameter |
| is removed from the environment-string table and the remaining body |
| of the table is compressed. |
| |
| DOS discards the environment-string table modified by this function |
| when your program ends. The environment-string table is the same as |
| it was before your program ran. |
| |
| You may use this statement to change the PATH parameter for a "child" |
| process (a program or command started by a SHELL statement) or to |
| pass parameters to a child by inventing a new environment parameter. |
| |
| Errors in environment-string tables include parameters that are not |
| strings and lack of free space. An Out of memory error message |
| is printed when no more space can be allocated to the environment- |
| string table. The amount of free space in the table is usually quite |
| small. |
