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To ensure that our custom sudo wrapper is not overwritten by a future re-install of sudo, it is created in /usr/loca/bin See https://github.com/dockbuild/dockbuild/issues/52
47 lines
1.5 KiB
Bash
Executable File
47 lines
1.5 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -ex
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set -o pipefail
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if ! command -v curl &> /dev/null; then
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echo >&2 'error: "curl" not found!'
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exit 1
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fi
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if ! command -v gpg &> /dev/null; then
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echo >&2 'error: "gpg" not found!'
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exit 1
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fi
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GOSU_VERSION=1.10
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dpkgArch=$(if test $(uname -m) = "x86_64"; then echo amd64; else echo i386; fi)
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url="https://github.com/tianon/gosu/releases/download/${GOSU_VERSION}/gosu-${dpkgArch}"
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url_key="https://github.com/tianon/gosu/releases/download/${GOSU_VERSION}/gosu-${dpkgArch}.asc"
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# download and verify the signature
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export GNUPGHOME="$(mktemp -d)"
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gpg --keyserver hkp://pool.sks-keyservers.net:80 --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 || \
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gpg --keyserver hkp://pgp.key-server.io:80 --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 || \
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gpg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4
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echo "Downloading $url"
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curl -o /usr/local/bin/gosu -# -SL $url
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echo "Downloading $url_key"
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curl -o /usr/local/bin/gosu.asc -# -SL $url_key
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gpg --verify /usr/local/bin/gosu.asc
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# cleanup -- need to kill agent so that there is no race condition for
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# agent files in $GNUPGHOME. Only need to do this on newer distros
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# with gpgconf installed supporting the option.
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GPGCONF_BIN="$(command -v gpgconf)" || true
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if [ -n "$GPGCONF_BIN" ] && [ -x $GPGCONF_BIN ] && [[ $($GPGCONF_BIN --help | grep -- "--kill" || true) != "" ]]; then
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gpgconf --kill gpg-agent
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fi
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rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc
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chmod +x /usr/local/bin/gosu
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