If hashing a file fails mkhash shouldn't just silently fail. Now check
after each call of `hash_file()` the return and exit early in case of
errors. The return value which was previously ignored and would always
return 0.
Signed-off-by: Paul Spooren <mail@aparcar.org>
The -n option prints the filename of hashed files next to the calculated
checksum. Reflect that in the usage message.
user@dawn:~/src/openwrt/openwrt$ ./a.out md5 -n .config
eb06db36e7b6751cb18801945e46bf5d .config
Signed-off-by: Paul Spooren <mail@aparcar.org>
This will be used to simplify the build system code for checking hashes.
Instead of using various variants of md5sum / openssl, use one simple
utility for all of them
Signed-off-by: Felix Fietkau <nbd@nbd.name>
