|
⇤ ← Revision 1 as of 2023-01-22 22:45:44
Size: 875
Comment:
|
Size: 933
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 18: | Line 18: |
A function's name must match `[a-zA-Z_][a-zA-Z0-9_]*`. |
Shell Function
Declaration
A function is declared like:
myfunction() {
:
}A function's name must match [a-zA-Z_][a-zA-Z0-9_]*.
Usage
The above function would be called like:
myfunction "first argument" "second argument"
Arguments
Arguments passed to a function implicitly overwrite the positional variables ($1, $2, and so on) as well as the argument count variable ($#). All of these will be reset to the original values upon the function's return.
Note that $0 is not overwritten.
Error and Return Codes
A function does not set the exit code. But it also does not clear the code. The final command in a function effectively sets the error code for the function as well.
The return builtin causes the function to return immediately.