reslashify - a sed script to reverse slashes in pathnames (DOS <--> Unix)

relashify.sed

#!/usr/bin/env sed -f

# replace all forward slashes only if there are no backslashes
# (i.e., convert Unix-style pathnames to DOS/Windows-style ones)
/\\/! s_/_\\_g

# branch (to the end) if any substitutions have been made at this point,
# to prevent the next pattern from undoing what the first one did
t

# replace all backslashes only if there are no forward slashes
# (i.e., convert DOS-style pathnames to Unix-style ones)
/\//! s_\\_/_g

# vim: ft=sed