CODEWITHSUNDEEP
bashshellprintf
user2357667
user2357667

Reputation: 89

shell script printf meaning

Inside a for loop (i) I have to test:

if [[ "${PARAMETER[$i]}" =~ $(printf "|^%s\$" "${COMMANDS[@]" | cut -c 2-)]]; then....

And my doubt is in the printf part. Sorry if it is not well explained.

Upvotes: 0

Views: 180

Answers (1)

Jens
Jens

Reputation: 72639

The POSIX printf function works almost like its C counterpart. Here, the %s is replaced with whatever "${COMMANDS[@]" expands to. The result has a |^ prepended, and a $ appended.

If "${COMMANDS[@]" expands to multiple tokens, the result is the concatenation of all such strings.

Note: did you forget a blank before the ]]?

Upvotes: 1

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