tree cf39f9b7af03f4525a4aa297317bbcf754891116
parent 184ef36f85d66583306413727fc5f39557d391e4
author Rich Felker <dalias@aerifal.cx> 1534980596 -0400
committer Rich Felker <dalias@aerifal.cx> 1534980596 -0400

getopt: update optarg and optind correctly on missing argument

the text of the specification for getopt's handling of options that
require an argument, which requires updating optarg and optind, does
not exclude the error case where the end of the argument list has been
reached. in that case, it is expected that optarg be assigned
argv[argc] (normally null) and optind be incremented by 2, resulting
in a value of argc+1.