83 lines
1.9 KiB
Text
83 lines
1.9 KiB
Text
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#!/data/data/com.termux/files/usr/bin/sh
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# tsu
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show_usage() {
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echo 'tsu - a wrapper for su for Termux'
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echo
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echo 'Usage: tsu [-e|-p|-s <shell>]'
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echo
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echo '-s [</path/to/shell>]'
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echo ' Use an alternate specified shell. `//usr` is expanded to $PREFIX.'
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echo '-p'
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echo ' Prepend /system/bin and /system/xbin to PATH.'
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echo '-e'
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echo ' Setup up some enviroment variables as when in Termux.'
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}
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# parse the options
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# TODO: validate command line arguments
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while getopts ':ehps:' opt ; do
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case $opt in
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e)
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SETUP_ENV=1
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;;
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s)
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USER_SHELL=$OPTARG
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;;
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h)
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show_usage
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exit
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;;
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p)
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PREPEND_SYSTEM_PATH=1
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;;
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esac
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done;
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# prefix check
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test -z "$PREFIX" && PREFIX=/data/data/com.termux/files/usr
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# prepend path
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if test -n "$PREPEND_SYSTEM_PATH"; then
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PATH="/system/bin:/system/xbin:$PATH"
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fi
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# export environment variables.
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if test -n "$SETUP_ENV"; then
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export HOME=/data/data/com.termux/files/home
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TERMUX_PATHS=data/data/com.termux/files/usr/bin:/data/data/com.termux/files/usr/bin/applets
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if test -n "$PREPEND_SYSTEM_PATH"; then
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PATH="$PATH:$TERMUX_PATHS"
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else
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PATH="$TERMUX_PATHS:$PATH"
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fi;
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export PATH;
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fi;
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# select shell
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if test -z "$USER_SHELL"; then
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# check if user has set shell
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if test -x "$HOME/.termux/shell" ; then
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ROOT_SHELL=$HOME/.termux/shell
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# has installed bash?
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elif test -x "$PREFIX/bin/bash" ; then
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ROOT_SHELL="$PREFIX/bin/bash"
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# no..fallback to default ash
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else
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ROOT_SHELL="$PREFIX/bin/ash"
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fi
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else
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# expand //usr/ to /usr/
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USER_SHELL_EXPANDED=$(echo "$USER_SHELL" | sed "s|^//usr/|$PREFIX/|")
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ROOT_SHELL="$USER_SHELL_EXPANDED"
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fi
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# using the -c option of su allows to pass enviroment variables
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for s in '/system/xbin/su' '/su/bin/su'; do
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if [ -e "$s" ]; then
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exec "$s" --preserve-environment -c "LD_LIBRARY_PATH=$PREFIX/lib $ROOT_SHELL"
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fi;
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done;
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