assignments preceding special builtins persist as exported

• Reporter: (Anonymous)
• 소유자: magicant
• Type: Bugs
• Status: Closed
• Component: shell-main
• MileStone: (None)
• Priority: 3
• Severity: 5 - Medium
• Resolution: Invalid
• File: None

Details Reply

$ yash -c 'v=foo :; env | grep ^v='
foo

The assignment should persist as : is a special builtin, but I don't think it should be exported.

Ticket History (3/5 Histories)

2018-04-26 10:49 Updated by: None

• New Ticket "assignments preceding special builtins persist as exported" created

2018-04-26 10:50 Updated by: mcdutchie

댓글 올리기 Reply

Forgot to log in again. I am the reporter.

2018-04-27 00:38 Updated by: magicant

• Component Update from (None) to shell-main
• 소유자 Update from (None) to magicant

댓글 올리기 Reply

The current behavior is explicitly allowed in the POSIX standard.

http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_09_01

If the command name is a special built-in utility, variable assignments shall affect the current execution environment. Unless the set -a option is on (see set), it is unspecified: (1) Whether or not the variables gain the export attribute during the execution of the special built-in utility (2) Whether or not export attributes gained as a result of the variable assignments persist after the completion of the special built-in utility

It is surprising to me, though, that many other shells behave differently than yash.

2018-10-06 18:05 Updated by: magicant

• Resolution Update from None to Postponed
• Priority Update from 5 - Medium to 3

2023-09-15 00:56 Updated by: magicant

• Resolution Update from Postponed to Invalid
• Status Update from Open to Closed