/* Process N_FILES file names, FILE[0] through FILE[N_FILES - 1].
For each file name F, call ACT (F, WD, OPTIONS); ACT should invoke
savewd_chdir as needed, and should return an exit status. WD
- represents thw working directory; it may be in an error state when
+ represents the working directory; it may be in an error state when
ACT is called.
Save and restore the working directory as needed by the file name