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doc/help/Update

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+update -- replace outdated files
+
+syntax:  update <pathname> <pathname> [-f] [-b]
+
+ex:      update %help /otherdisk/davex/help -f
+         update /work /backup
+         update /that/? /there/?
+
+'update' takes two pathnames (original path first, target 
+path second) and updates old files, reporting on its 
+progress as it goes.  If the pathnames are DIRECTORIES, 
+update descends into them and updates corresponding files.
+
+[Note:  If one of the pathnames refers to a directory, the
+other one should, too.  A command like "update /disk1/dir1/?
+/disk2/dir2" will result only in a series of "filetypes differ"
+messages.  So use a wildcard on both pathnames or don't use
+one at all.]
+
+For files, here's what happens.  If the target file does not 
+exist, update asks for permission to create it.  If the target 
+file does exist, three conditions are possible.  If the 
+modification dates and times match exactly, you see "current"
+and 'update' takes no further action on that pair of files.
+If the target file is older, you see "outdated" and are asked
+for permission to replace the old file.  If the target file is
+NEWER, you get a warning message and update takes no further
+action on that pair of files.
+
+-f (force) bypasses the "Okay to replace" question, just 
+like for the copy command.  (In fact, update USES the copy 
+command.)  -f also bypasses the "Okay to create new file"
+questions.
+
+-b clears the Backup bit on the source original files.  See
+"help copy" for more information.
+