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- RZ(1) UNIX Programmer's Manual RZ(1)
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- NAME
- rx, rb, rz - XMODEM, YMODEM, ZMODEM (Batch) file receive
-
- SYNOPSIS
- rz [- +1abepqtuv]
- rb [- +1abqtuv]
- rz [- 1abceqtuv] file
- gz file ...
- >Not implemented in amiga version
- > [-][v]rzCOMMAND
-
- DESCRIPTION
- This program uses error correcting protocol to receive files
- over a serial port from a variety of programs running under
- AmigaDos,PC-DOS, CP/M, Unix, and other operating systems.
-
- The first form of rz (Receive ZMODEM) receives files with
- the ZMODEM batch protocol. If the sending program does not
- support ZMODEM, rz steps down to YMODEM protocol after 50
- seconds. This delay can be eliminated by invoking the pro-
- gram as rb .
-
- When receiving with XMODEM or YMODEM, Rz accepts either
- standard 128 byte sectors or 1024 byte sectors (YAM -k
- option). The user should determine when the longer block
- length actually improves throughput without causing prob-
- lems.
-
- If extended file information (file length, etc.) is
- received, the file length controls the number of bytes writ-
- ten to the output dataset (YMODEM only), and the modify time
- and file mode (iff non zero) are set accordingly.
-
- If no extended file information is received, slashes in the
- pathname are changed to underscore, and any trailing period
- in the pathname is eliminated. This conversion is useful
- for files received from CP/M systems. With YMODEM, each
- file name is converted to lower case unless it contains one
- or more lower case letters.
-
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- The second form of rz receives a single file with XMODEM
- protocol. The user must supply the file name to both send-
- ing and receiving programs.
-
-
- Gz is a shell script which calls sz to command Pro-YAM or
- ZCOMM to transmit the specified files. Pathnames used with
- gz must be escaped if they have special significance to the
- Unix shell.
- EXAMPLE: gz "-a C:*.c D:*.h"
-
- >Not implemented in amiga version
- > The third form of rz is invoked as rzCOMMAND (with an
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- Printed 10/25/87 OMEN 1
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- > optional leading - as generated by login(1)). For each
- > received file, rz will pipe the file to ``COMMAND filename''
- > where filename is the name of the transmitted file with the
- > file contents as standard input.
- >
- > Each file transfer is acknowledged when COMMAND exits with 0
- > status. A non zero exit status terminates transfers.
- >
- > A typical use for this form is rzrmail which calls rmail(1)
- > to post mail to the user specified by the transmitted file
- > name. For example, sending the file "caf" from a PC-DOS
- > system to rzrmail on a Unix system would result in the con-
- > tents of the DOS file "caf" being mailed to user "caf".
- >
- > On some Unix systems, the login directory must contain a
- > link to COMMAND as login sets SHELL=rsh which disallows
- > absolute pathnames. If invoked with a leading ``v'', rz
- > will report progress to /tmp/rzlog. The following entry
- > works for Unix 3.0:
- > rzrmail::5:1::/bin:/usr/local/rzrmail
- > If the SHELL environment variable includes rsh or rksh (res-
- > tricted shell), rz will not accept absolute pathnames or
- > references to a parent directory, will not modify an exist-
- > ing file, and removes any files received in error.
- >
- > If rz is invoked with stdout and stderr to different
- > datasets, Verbose is set to 2, causing frame by frame pro-
- > gress reports to stderr. This may be disabled with the q
- > option.
- >
- >
- The meanings of the available options are:
-
- >Not implemented in amiga version
- >
- > 1 Use file descriptor 1 for ioctls and reads (Unix only).
- > By default, file descriptor 0 is used for ioctls and
- > reads. This option allows rz to be used with the
- > Professional-YAM $ command and some versions of ncu(1).
- a Convert files to Unix conventions by stripping carriage
- returns and all characters beginning with the first
- Control Z (CP/M end of file).
- b Binary (tell it like it is) file transfer override.
- c Request 16 bit CRC. XMODEM file transfers default to 8
- bit checksum. YMODEM and ZMODEM normally use 16 bit
- CRC.
- D Output file data to /dev/null; for testing.
- e Force sender to escape all control characters; normally
- XON, XOFF, DLE, CR-@-CR, and Ctrl-X are escaped.
- p (ZMODEM) Protect: skip file if destination file exists.
- q Quiet suppresses verbosity.
- t tim
- Change timeout to tim tenths of seconds.
- v Verbose causes a list of file names to be appended to
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- Printed 10/25/87 OMEN 2
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- /tmp/rzlog . More v's generate more output.
-
- EXAMPLES
- (Pro-YAM command)
- <ALT-2>
- Pro-YAM Command: sz *.h *.c
- (This automatically invokes rz on the connected system.)
-
- SEE ALSO
- ZMODEM.DOC, YMODEM.DOC, IMP(CP/M), Professional-YAM,
- sz(omen), usq(omen), undos(omen)
-
- Compile time options required for various operating systems
- are described in the source file.
-
- NOTES
- The Unix "ulimit" parameter must be set high enough to per-
- mit large file transfers.
-
- The TTY input buffering on some systems may not allow long
- blocks or streaming input at high speed. You should suspect
- this problem when you can't send data to the Unix system at
- high speeds using ZMODEM when YMODEM with 128 byte blocks
- works properly. If the system's tty line handling is really
- broken, the serial port or the entire system may not survive
- the onslaught of long bursts of high speed data.
-
- The DSZ or Pro-YAM zmodem l numeric parameter may be set to
- a value between 64 and 1024 to limit the burst length ("zmo-
- dem pl128").
-
- 32 bit CRC code courtesy Gary S. Brown.
-
- BUGS
- Calling rz from most versions of cu(1) doesn't work because
- cu's receive process fights rz for characters from the
- modem.
-
- Pathnames are restricted to 127 characters. In XMODEM sin-
- gle file mode, the pathname given on the command line is
- still processed as described above. The ASCII option's
- CR/LF to NL translation merely deletes CR's; undos(omen)
- performs a more intelligent translation.
-
- VMS VERSION
- Some of the #includes with file names enclosed with angle
- brackets <> may need to have the angle brackets changed to
- "", or vice versa.
-
- The VMS version does not set binary mode according to the
- incoming file type. Non binary file processing consists of
- stripping all characters beginning with CPMEOF (^Z).
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- Printed 10/25/87 OMEN 3
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- The VMS version does not set the file time.
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- At high speeds, VMS sometimes loses incoming characters,
- resulting in retries and degradation of throughput.
-
- The mysterious VMS C Standard I/O Package and RMS may
- interact to modify file contents unexpectedly.
-
- The VMS version does not support invocation as rzCOMMAND .
- ZMODEM has not yet been implemented on the VMS version.
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- ZMODEM CAPABILITIES
- Rz supports incoming ZMODEM binary (-b), ASCII (-a), protect
- (-p), and append (-+) requests, and ZMODEM command execu-
- tion.
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- FILES
- rz.c, rbsb.c, zm.c, zmodem.h source files.
-
- /tmp/rzlog stores debugging output generated with -vv
- option.
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- Printed 10/25/87 OMEN 4
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