udevadm sub commands adding short options in usage

This patchset adds short options in usage, also correct two short options in getopt_long.

I can't not figure out the short options, neither from the "udevadm subcommand -h", nor the man pages, except I looking into the code.

Hopefully this can be applied. Thanks.

Quoted 6 lines · Yin Kangkai

This patchset adds short options in usage, also correct two short options in getopt_long.

I can't not figure out the short options, neither from the "udevadm subcommand -h", nor the man pages, except I looking into the code.

Quoted 1 line

Hopefully this can be applied. Thanks.

Short options are intentionally not part of the ABI, they are not documented on purpose. We only export long options, the short versions (besides the very few we had in man pages years ago, and can not change) may change without notice.