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1995-03-18
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RZ(1) UNIX Programmer's Manual RZ(1)
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.
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
Printed 10/25/87 OMEN 1
RZ(1) UNIX Programmer's Manual RZ(1)
> 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
Printed 10/25/87 OMEN 2
RZ(1) UNIX Programmer's Manual RZ(1)
/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).
Printed 10/25/87 OMEN 3
RZ(1) UNIX Programmer's Manual RZ(1)
The VMS version does not set the file time.
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.
ZMODEM CAPABILITIES
Rz supports incoming ZMODEM binary (-b), ASCII (-a), protect
(-p), and append (-+) requests, and ZMODEM command execu-
tion.
FILES
rz.c, rbsb.c, zm.c, zmodem.h source files.
/tmp/rzlog stores debugging output generated with -vv
option.
Printed 10/25/87 OMEN 4