CODEWITHSUNDEEP
shellunixscriptingksh
Dima
Dima

Reputation: 1828

Get function name in KornShell script

I'd like to get the function name from within the function, for logging purposes.

KornShell (ksh) function:

foo ()
{
    echo "get_function_name some useful output"
}

Is there anything similar to $0, which returns the script name within scripts, but which instead provides a function's name?

Upvotes: 7

Views: 6581

Answers (4)

Joseph Martin
Joseph Martin

Reputation: 121

The function below seems to get its name in both Bash and ksh:

# ksh or bash
function foo {
  local myname="${FUNCNAME[0]:-$0}"
  echo "$myname"
}
# test
foo
# ...

Upvotes: 0

Lee Busby
Lee Busby

Reputation: 109

Use the ksh "function foo ..." form:

$ cat foo1
#!/bin/ksh
foo3() { echo "\$0=$0"; }
function foo2 { echo "\$0=$0"; }
foo2
foo3
$ ./foo1
$0=foo2
$0=./foo1

Upvotes: 5

Lee Busby
Lee Busby

Reputation: 109

[...] what are the main pros/cons of using keyword function?

Main pro is that "typeset myvar=abc" inside the function is now a local variable, with no possible side effects outside the function. This makes KSH noticeably safer for large shell scripts. Main con is, perhaps, the non-POSIX syntax.

Upvotes: 5

Fred Foo
Fred Foo

Reputation: 363787

If you define the function with the function keyword, then $0 is the function name:

$ function foo {
>     echo "$0"
> }
$ foo
foo

(Tested in pdksh.)

Upvotes: 10

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