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From: "mark at klomp dot org" <sourceware-bugzilla@sourceware.org>
To: elfutils-devel@sourceware.org
Subject: [Bug debuginfod/31562] New: profile.sh might fail with set -o
 pipefail
Date: Tue, 26 Mar 2024 19:48:42 +0000
X-Bugzilla-Reason: CC
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X-Bugzilla-Product: elfutils
X-Bugzilla-Component: debuginfod
X-Bugzilla-Version: unspecified
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: mark at klomp dot org
X-Bugzilla-Status: NEW
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X-Bugzilla-Priority: P2
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D31562

            Bug ID: 31562
           Summary: profile.sh might fail with set -o pipefail
           Product: elfutils
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: debuginfod
          Assignee: unassigned at sourceware dot org
          Reporter: mark at klomp dot org
                CC: elfutils-devel at sourceware dot org
  Target Milestone: ---

With set -o pipefail profile.sh might fail on:

DEBUGINFOD_URLS=3D$(cat /dev/null "${prefix}/etc/debuginfod"/*.urls 2>/dev/=
null |
tr '\n' ' ')

This is because if there isn't an *.urls file the first command in the pipe
fails (the 2>/dev/null is there to hide that failure).

This can be fixed by adding something like || echo -n "" like:

DEBUGINFOD_URLS=3D$(cat /dev/null "${prefix}/etc/debuginfod"/*.urls 2>/dev/=
null |
tr '\n' ' ' || echo -n "")

This works because echo -n "" produces the empty string, so the next line w=
ill
still unset DEBUGINFOD_URLS in that case:

[ -n "$DEBUGINFOD_URLS" ] && export DEBUGINFOD_URLS || unset DEBUGINFOD_URLS

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