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56 lines
1.3 KiB
Bash
56 lines
1.3 KiB
Bash
#!/bin/sh
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# (C) 2008 Yann E. MORIN <yann.morin.1998@free.fr>
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# Licensed under the GPL v.2
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LIBDUMA_SO=
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case "$1" in
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-on)
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case "${LD_PRELOAD}" in
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*${LIBDUMA_SO}*) ;;
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*) LD_PRELOAD="${LIBDUMA_SO} ${LD_PRELOAD}";;
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esac
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shift
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;;
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-off)
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# We use a suposedly POSIX-compliant shell: /bin/sh
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# -> we can't use "${LD_PRELOAD//${LIBDUMA_SO}/}", it's not POSIX
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# We don't know if sed will be present on the target
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# -> we can't use $(echo "${LD_PRELOAD}" |sed -r -e "s|${LIBDUMA_SO}||;")
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# So, iterate through LD_PRELOAD, and keep only those libs that
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# are not "${LIBDUMA_SO}"
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old_LD_PRELOAD="${LD_PRELOAD}"
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LD_PRELOAD=
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for lib in ${old_LD_PRELOAD}; do
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[ "${lib}" = "${LIBDUMA_SO}" ] || LD_PRELOAD="${LD_PRELOAD} ${lib}"
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done
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unset old_LD_PRELOAD
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shift
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;;
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-show)
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case "${LD_PRELOAD}" in
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*${LIBDUMA_SO}*) echo "duma is enabled";;
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*) echo "duma is disabled";;
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esac
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exit 0
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;;
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"")
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cat <<_EOF_
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Usage:
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. $0 <-on|-off|-show>
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Sets, unsets or show DUMA usage.
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$0 <executable [arg...]>
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Execute 'executable' (with arguments 'args') using DUMA.
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_EOF_
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false # Don't 'exit', we could well be source'd
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;;
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*)
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exec "$0" -on "$@"
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;;
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esac
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export LD_PRELOAD
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if [ -n "$1" ]; then
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exec "$@"
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fi
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