Support bash in privileged mode #16948
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MikeMcQuaid
approved these changes
Mar 25, 2024
carlocab
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Mar 26, 2024
carlocab
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Mar 27, 2024
| @@ -44,9 +44,10 @@ _create_lock() { | |||
| [[ -x "${ruby}" ]] || ruby="$(type -P ruby)" | |||
| [[ -x "${python}" ]] || python="$(type -P python)" | |||
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| if [[ -x "${ruby}" ]] && "${ruby}" -e "exit(RUBY_VERSION >= '1.8.7')" | |||
| # Use /dev/stdin, otherwise Ruby can error if uid != euid. | |||
| if [[ -x "${ruby}" ]] && "${ruby}" /dev/stdin <<<"exit(RUBY_VERSION >= '1.8.7')" | |||
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| if [[ -x "${ruby}" ]] && "${ruby}" /dev/stdin <<<"exit(RUBY_VERSION >= '1.8.7')" | |
| if [[ -x "${ruby}" ]] && "${ruby}" - <<<"exit(RUBY_VERSION >= '1.8.7')" |
This is equivalent, no? Though I suppose /dev/stdin is more explicit.
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I've adjusted the comment to mention that
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Looks good, thanks @Bo98! |
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This enables "privileged" mode in bash (which despite the name doesn't necessary elevate anything). This will filter out even more environment variables. It also enables the ability for EUID to be different to UID. This is a powerful tool that can be used in certain environments to better handle cask sudo privileges and I would like to give users the option to use it.
We defer the safety of such scenarios to the user calling brew. Homebrew will check if EUID or UID is root and abort, which should prevent the most common misuse via
setuidroot executables. No further checks than that are made. The caller should assume that either the EUID or UID can be escalated to at any time.For compatibility reasons, we will only use the EUID in formula build scripts and set UID to equal that.