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org.sonar.l10n.shellcheck.rules.shellcheck.SC3023.html Maven / Gradle / Ivy

In POSIX sh, FDs outside of 0-9 are undefined.
(or "In dash, ... are not supported." when using dash)
Problematic code
# Open FD #10 for writing
exec 10> file

Correct code
Either rewrite the script to only use FDs in the valid range, or switch to a shell that allows a larger range like bash or ksh.
Rationale
The shell grammar is only required to recognize a single digit before redirections to set the file descriptor, which limits the portable range to 0-9.
Exceptions
None.
Related resources

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