Shell quoting
From: "H. Peter Anvin" <hpa@zytor.com>
Date: 2016-06-15 22:42:06
Okay, I'm trying to put together some rules that should work across shells. For byte values: 0 Hopeless - not representable in C strings 1-31,127 Prefix with ^V if (and only if!) entered at a prompt, as opposed to passed in the ssh command field 32-126 \-escape all characters except -+_@=:.,/ and ASCII alphanumerics 128- Don't escape (would have to be done differently depending on locale, and shouldn't be needed) Anyone know of a system for which that breaks horribly? The 1-31,127 stuff is iffy, but I just don't know of anything that's more reliable. Unfortunately \010-style quoting doesn't work in any of the common shells. -hpa