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profile/systemd-osc-context: fix overriding of PROMPT_COMMAND

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In https://github.com/systemd/systemd/issues/39114 users are reporting
that our script overrides PROMPT_COMMAND that they had. After looking
at /etc/bashrc in Fedora, I see that it only sets PROMPT_COMMAND if
[ -z "$PROMPT_COMMAND" ]. Let's adjust the script so this continues to
work.

Fixes https://github.com/systemd/systemd/issues/39114.
(This is a bit of a stretch. 39114 was originally about SecureCRT,
but that was resolved in SecureCRT. But there was a lot of dicussion
about the prompt being overriden, which this commit should fix.)
This commit is contained in:
Zbigniew Jędrzejewski-Szmek
2025-11-06 11:55:06 +01:00
parent fea7f5d68b
commit dd20ba74e3
1 changed files with 5 additions and 1 deletions
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6
profile.d/80-systemd-osc-context.sh
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@@ -57,7 +57,11 @@ __systemd_osc_context_precmdline() {
}
if [[ -n "${BASH_VERSION:-}" ]] && [[ "${TERM:-}" != "dumb" ]]; then
# Whenever a new prompt is shown close the previous command, and prepare new command
# Legacy bashrc will assign PROMPT_COMMAND=, which is equivalent to assigning
# index 0 in the array. Leave an empty spot to handle this gracefully.
[ -n "$(declare -p PROMPT_COMMAND 2>/dev/null)" ] || PROMPT_COMMAND+=('')
# Whenever a new prompt is shown, close the previous command, and prepare new command
PROMPT_COMMAND+=(__systemd_osc_context_precmdline)
# PS0 is shown right after a prompt completed, but before the command is executed