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1 SC3048
Vidar Holen edited this page 2020-09-07 20:20:54 -07:00
Table of Contents

In POSIX sh, prefixing signal names with 'SIG' is undefined.

(or "In dash, ... is not supported." when using dash)

Problematic code:

trap 'handle_interrupt' SIGINT

Correct code:

trap 'handle_interrupt' INT

Rationale:

POSIX does not allow specifying the "SIG" prefix of a signal name like "INT". Bash and Ksh supports this as an extension.

Simply remove the "SIG" from the signal name.

Exceptions:

None

Related resources:

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

ShellCheck

Each individual ShellCheck warning has its own wiki page like SC1000. Use GitHub Wiki's "Pages" feature above to find a specific one, or see Checks.