29 lines
868 B
Bash
29 lines
868 B
Bash
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#!/bin/sh
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# Deregister the identity shim from /etc/ld.so.preload before its files are removed
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# (NAROS.md §2.3), so the loader never names a library that is no longer on disk.
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#
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# Runs on remove/deconfigure only: on `upgrade` the entry must persist, since the
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# replacement .so lands at the same path and the new postinst is a no-op.
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set -e
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LIB=/usr/lib/naros/libnaros-uname.so
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PRELOAD=/etc/ld.so.preload
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TMP="$PRELOAD.naros-tmp"
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case "$1" in
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remove | deconfigure)
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[ -f "$PRELOAD" ] || exit 0
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# grep exits 1 when nothing survives the filter; that is the empty case, not an error.
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grep -vxF "$LIB" "$PRELOAD" > "$TMP" || true
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if [ -s "$TMP" ]; then
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chmod 0644 "$TMP"
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mv "$TMP" "$PRELOAD"
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else
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# An empty ld.so.preload is legal but pointless — drop the file entirely.
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rm -f "$TMP" "$PRELOAD"
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fi
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;;
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esac
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exit 0
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