tree bb45d9493b530154a8f5a856cc1fcc22527c84ee
parent 8e0b38060d7a9916fc2b5de0dd7c166ef60be9c1
author Rich Felker <dalias@aerifal.cx> 1519232374 -0500
committer Rich Felker <dalias@aerifal.cx> 1519232489 -0500

convert execvp error handling to switch statement

this is more extensible if we need to consider additional errors, and
more efficient as long as the compiler does not know it can cache the
result of __errno_location (a surprisingly complex issue detailed in
commit a603a75a72bb469c6be4963ed1b55fabe675fe15).