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[csh]backup_copyc.csh; foreach; continue
# 41 JMJS    09.4.24 07:55

% cat copyc
#
# Copyc copies those C programs in the specified list
# to the directory ?backup if they differ from the files
# already in ?backup
#
set noglob
foreach i ($argv)
if ($i !?*.c) continue # not a .c file so do nothing
if (! −r ?backup/$i:t) then
echo $i:t not in backup... not cp\ed
continue
endif
cmp −s $i ?backup/$i:t # to set $status
if ($status != 0) then

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