1 SC3042

Vidar Holen edited this page 2022-11-02 21:09:04 -07:00

Table of Contents

• In POSIX sh, set flag --default is undefined
• Problematic code:
• Correct code:
• Rationale:
• Exceptions:
• Related resources:

In POSIX sh, set flag --default is undefined

(or any other option)

Problematic code:

#!/bin/ksh
set --default

Correct code:

Switch to a shell that supports these options, such as Ksh:

#!/bin/ksh
set --default

Rationale:

Your script uses a shell feature not supported by the shebang. Either rewrite the script to be portable, or change the shebang to explicitly require a shell like Ksh.

Most shell specific set flags are hard to emulate in POSIX, so use your best judgement as to whether you can make do without them, or if you should require a shell that supports them.

Exceptions:

None

Related resources:

• Help by adding links to BashFAQ, StackOverflow, man pages, POSIX, etc!

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