a Script to allow normal user to launch root shell, after providing a KEY file.
In android, I don't want to root my phone, but still needs root access.
So I installed this script, instead of SuperSU.
#include <rlib/sys/unix_handy.hpp> | |
#include <rlib/opt.hpp> | |
int main(int argc, char **argv) { | |
rlib::opt_parser args(argc, argv); | |
auto keyFile = args.getValueArg("-k", false, ""); | |
setuid(geteuid()); | |
setgid(getegid()); | |
rlib::execs("/bin/bash", std::vector<std::string>{"runas.impl.sh", keyFile}); | |
} | |
#!/bin/bash | |
# Usage: 1. Generate your key file, and keep it secret. Get its SHA256 and write it down at `answer`. | |
# 2. Compile runas.cc, Then run the following commands as root: | |
# chmod +s ./runas | |
# 3. Try `./runas -k ./key` as normal user. | |
# | |
# File Permissions: | |
# | |
# -rwsr-sr-x 1 root root 82K Apr 18 19:29 runas* | |
# -rw-r--r-- 1 recolic recolic 320 Apr 18 19:29 runas.cc | |
# ---------- 1 root root 733 Apr 18 19:35 runas.impl.sh* | |
[ "$1" = "" ] && key_file_name="./key" || key_file_name="$1" | |
echo "Verifying '$key_file_name'..." | |
#### Verify key file | |
checksum=$(sha256sum "$key_file_name" | sed 's/ .*$//g') | |
answer='07ecd901c90ee7a72efdc0d7e7b47c2b8d02b5a9cfcbb9ae4f0f31561d01af04' | |
if [ "$checksum" = "$answer" ]; then | |
bash | |
else | |
echo 'Verification failed.' | |
exit 2 | |
fi | |
exit $? | |