Blame doc/COMPATABILITY.lrzsz
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ZModem standard:
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lrzsz is compatible with standard zmodem as long as you don't use
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certain options:
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-8 is incompatible with the standard, but should work with most
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DOS/Atari/Amiga ZModems. It's a common extension, but a dangerous
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one. Do not use it unless you know that the receiver can handle it.
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-S is incompatible with certain ZModems which use the TIMESYNC bit
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for other purposes (timesync is a protocol extension by Peter
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Mandrella, read timesync.doc for more information). The default
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is to disable timesync, you must use the `S' option to enable it.
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Calling conventions:
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lrzsz is not fully compatible with older UNIX ZModems:
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- PUBDIR (/var/spool/uucppublic) is normally disabled. If you like
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public writable directories please use:
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configure --enable-pubdir=/var/spool/uucppublic
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- lrz defaults to restricted mode, in which the sender must not upload
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any files outside the working directory or PUBDIR (if pubdir is
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enabled). With the old version you had to set SHELL=rsh.
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For more information read the SECURITY paragraph in lrz.1.
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- lrz: remote command execution is disabled. To enable it use -C (but
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be careful - the sender might delete all your files).
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- lrz: does not set executable bits for any files it received under
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a restricted shell.
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