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Cream of the Crop 1
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COMM
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RZSZ1291.ARJ
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SZ.DOC
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1991-10-30
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17KB
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397 lines
SSSSZZZZ((((1111)))) OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))) SSSSZZZZ((((1111))))
NNNNAAAAMMMMEEEE
sx, sb, sz - Send Files with ZMODEM, YMODEM, or XMODEM
zcommand, zcommandi - Send COmmands with ZMODEM
SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
sz [-++++aaaabbbbddddeeeeffffkkkkLLLLllllNNNNnnnnooooppppTTTTttttuuuuvvvvyyyyYYYYZZZZ] _f_i_l_e ...
sb [-ddddffffkkkkttttuuuuvvvv] _f_i_l_e ...
sx [-kkkkttttuuuuvvvv] _f_i_l_e
zcommand [-oooottttvvvv] CCCCOOOOMMMMMMMMAAAANNNNDDDD
zcommandi [-oooottttvvvv] CCCCOOOOMMMMMMMMAAAANNNNDDDD
sz -TT
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
SSSSzzzz (send ZMODEM) uses the ZMODEM, YMODEM or XMODEM error
correcting protocol to send one or more files over a dial-in
serial port to a variety of programs running under PC-DOS,
CP/M, Unix, VMS, and other operating systems.
This is a copyrighted shareware program. Commercial use of
this program is subject to licensing conditions detailed in
the rz.c source code. "Commercial Use" includes use of this
program to send files to commercial and/or shareware
programs not published by Omen Technology INC.
This program is not designed to be called from _c_u(_1) _t_i_p(_1),
or other communications programs. Unix flavors of Omen
Technology's Professional-YAM communications software are
available for dial-out applications. Unix Professional-YAM
supports dial-out applications with telephone directory, a
powerful script language with learn function, high quality
multiple protocol support, and UUCP port arbitration.
SSSSzzzz sends one or more files with ZMODEM protocol.
ZMODEM greatly simplifies file transfers compared to XMODEM.
In addition to a friendly user interface, ZMODEM provides
Personal Computer and other users an efficient, accurate,
and robust file transfer method.
ZMODEM provides complete EEEENNNNDDDD----TTTTOOOO----EEEENNNNDDDD data integrity between
application programs. ZMODEM's 32 bit CRC catches errors
that sneak into even the most advanced networks.
Advanced file management features include AutoDownload
(Automatic file Download initiated without user
intervention), Display of individual and total file lengths
and transmission time estimates, Crash Recovery, selective
file transfers, and preservation of exact file date and
length.
Page 1 (printed 10/30/91)
SSSSZZZZ((((1111)))) OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))) SSSSZZZZ((((1111))))
The ----yyyy option instructs the receiver to open the file for
writing unconditionally. The ----aaaa option causes the receiver
to convert Unix newlines to PC-DOS carriage returns and
linefeeds.
SSSSbbbb sends one or more files with YMODEM or ZMODEM protocol.
The initial ZMODEM initialization is not sent. When
requested by the receiver, ssssbbbb supports YYYYMMMMOOOODDDDEEEEMMMM----gggg with
"cbreak" tty mode, XON/XOFF flow control, and interrupt
character set to CAN (^X). YYYYMMMMOOOODDDDEEEEMMMM----gggg (Professional-YAM gggg
option) increases YMODEM throughput over error free channels
(direct connection, X.PC, etc.) by disabling error recovery.
On Unix systems, additional information about the file is
transmitted. If the receiving program uses this
information, the transmitted file length controls the exact
number of bytes written to the output dataset, and the
modify time and file mode are set accordingly.
SSSSxxxx sends a single _f_i_l_e with XXXXMMMMOOOODDDDEEEEMMMM or XXXXMMMMOOOODDDDEEEEMMMM----1111kkkk protocol
(sometimes incorrectly called "ymodem"). The user must
supply the file name to both sending and receiving programs.
Iff sssszzzz is invoked with $SHELL set and iff that variable
contains the string _r_s_h or _r_k_s_h (restricted shell), sssszzzz
operates in restricted mode. Restricted mode restricts
pathnames to the current directory and PUBDIR (usually
/usr/spool/uucppublic) and/or subdirectories thereof.
The fourth form sends a single COMMAND to a ZMODEM receiver
for execution. ZZZZccccoooommmmmmmmaaaannnndddd exits with the COMMAND return
value. If COMMAND includes spaces or characters special to
the shell, it must be quoted.
The fifth form sends a single COMMAND to a ZMODEM receiver
for execution. ZZZZccccoooommmmmmmmaaaannnnddddiiii exits as soon as the receiver has
correctly received the command, before it is executed.
The sixth form (sz -TT) attempts to output all 256 code
combinations to the terminal. In you are having difficulty
sending files, this command lets you see which character
codes are being eaten by the operating system.
The meanings of the available options are:
Page 2 (printed 10/30/91)
SSSSZZZZ((((1111)))) OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))) SSSSZZZZ((((1111))))
++++ Instruct the receiver to append transmitted data to an
existing file (ZMODEM only).
aaaa Instruct the ZMODEM receiver to convert text file
format as appropriate for the receiving system. Valid
only for ZMODEM.
bbbb (ZMODEM) Binary override: transfer file without any
translation.
cccc Instruct the receiver to change the pathname if the
destination file exists.
dddd Change all instances of "." to "/" in the transmitted
pathname. Thus, C.omenB0000 (which is unacceptable to
MSDOS or CP/M) is transmitted as C/omenB0000. If the
resultant filename has more than 8 characters in the
stem, a "." is inserted to allow a total of eleven.
eeee Escape all control characters; normally only XON, XOFF,
DLE, CR-@-CR, and Ctrl-X are escaped.
ffff Send Full pathname. Normally directory prefixes are
stripped from the transmitted filename.
kkkk (XMODEM/YMODEM) Send files using 1024 byte blocks
rather than the default 128 byte blocks. 1024 byte
packets speed file transfers at high bit rates.
(ZMODEM streams the data for the best possible
throughput.)
LLLL NNNN Use ZMODEM sub-packets of length N. A larger N (32 <=
N <= 1024) gives slightly higher throughput, a smaller
N speeds error recovery. The default is 128 below 300
baud, 256 above 300 baud, or 1024 above 2400 baud.
llll NNNN Wait for the receiver to acknowledge correct data every
NNNN (32 <= N <= 1024) characters. This may be used to
avoid network overrun when XOFF flow control is
lacking.
nnnn (ZMODEM) Send each file if destination file does not
exist. Overwrite destination file if source file is
newer than the destination file.
NNNN (ZMODEM) Send each file if destination file does not
exist. Overwrite destination file if source file is
newer or longer than the destination file.
oooo (ZMODEM) Disable automatic selection of 32 bit CRC.
pppp (ZMODEM) Protect existing destination files by skipping
transfer if the destination file exists.
rrrr (ZMODEM) Resume interrupted file transfer. If the
source file is longer than the destination file, the
transfer commences at the offset in the source file
that equals the length of the destination file.
rrrrrrrr As above, but compares the files (the portion common to
sender and reciever) before resuming the transfer.
tttt ttttiiiimmmm
Change timeout to _t_i_m tenths of seconds.
uuuu Unlink the file after successful transmission.
wwww NNNN Limit the transmit window size to N bytes (ZMODEM).
vvvv Verbose causes a list of file names to be appended to
/tmp/szlog . More v's generate more output.
Page 3 (printed 10/30/91)
SSSSZZZZ((((1111)))) OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))) SSSSZZZZ((((1111))))
yyyy Instruct a ZMODEM receiving program to overwrite any
existing file with the same name.
YYYY Instruct a ZMODEM receiving program to overwrite any
existing file with the same name, and to skip any
source files that do have a file with the same pathname
on the destination system.
ZZZZ Use ZMODEM file compression to speed file transfer.
DDDDIIIIAAAAGGGGNNNNOOOOSSSSTTTTIIIICCCCSSSS
Exit status is as follows: 0 for successful transfers. 1 if
unrecoverable errors are detected. 2 if syntax errors or
file access problems are detected. 3 if the program was
terminated by a caught interrupt.
EEEEXXXXAAAAMMMMPPPPLLLLEEEESSSS
ZZZZMMMMOOOODDDDEEEEMMMM FFFFiiiilllleeee TTTTrrrraaaannnnssssffffeeeerrrr (Unix to DSZ/ZCOMM/Professional-YAM)
%%%% sssszzzz ----aaaa ****....cccc
This single command transfers all .c files in the current
Unix directory with conversion (----aaaa) to end of line
conventions appropriate to the receiving environment. With
ZMODEM AutoDownload enabled, Professional-YAM and ZCOMM
will automatically recieve the files after performing a
security check.
%%%% sssszzzz ----YYYYaaaannnn ****....cccc ****....hhhh
Send only the .c and .h files that exist on both systems,
and are newer on the sending system than the corresponding
version on the receiving system, converting Unix to DOS text
format.
ZZZZMMMMOOOODDDDEEEEMMMM CCCCoooommmmmmmmaaaannnndddd DDDDoooowwwwnnnnllllooooaaaadddd (Unix to Professional-YAM)
cpszall:all
zcommand "c:;cd /yam/dist"
sz -ya $(YD)/*.me
sz -yb y*.exe
zcommand "cd /yam"
zcommandi "!insms"
This Makefile fragment uses zzzzccccoooommmmmmmmaaaannnndddd to issue commands to
Professional-YAM to change current disk and directory.
Next, sssszzzz transfers the ._m_e files from the $YD directory,
commanding the receiver to overwrite the old files and to
convert from Unix end of line conventions to PC-DOS
conventions. The third line transfers some ._e_x_e files. The
fourth and fifth lines command Pro-YAM to change directory
and execute a PC-DOS batch file _i_n_s_m_s . Since the batch file
takes considerable time, the zzzzccccoooommmmmmmmaaaannnnddddiiii form is used to allow
the program to exit immediately.
XXXXMMMMOOOODDDDEEEEMMMM FFFFiiiilllleeee TTTTrrrraaaannnnssssffffeeeerrrr (Unix to Crosstalk)
% ssssxxxx ffffoooooooo....cccc
EEEESSSSCCCC
rrrrxxxx ffffoooooooo....cccc
Page 4 (printed 10/30/91)
SSSSZZZZ((((1111)))) OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))) SSSSZZZZ((((1111))))
The above three commands transfer a single file from Unix to
a PC and Crosstalk. This combination is much slower and
less reliable than ZMODEM.
EEEERRRRRRRROOOORRRR MMMMEEEESSSSSSSSAAAAGGGGEEEESSSS
"Caught signal 99" indicates the program was not properly
compiled, refer to "bibi(99)" in rbsb.c for details.
SSSSEEEEEEEE AAAALLLLSSSSOOOO
rz(omen), ZMODEM.DOC, YMODEM.DOC, Professional-YAM,
crc(omen), sq(omen), todos(omen), tocpm(omen), tomac(omen),
yam(omen)
Compile time options required for various operating systems
are described in the source file.
FFFFIIIILLLLEEEESSSS
32 bit CRC code courtesy Gary S. Brown.
sz.c, crctab.c, rbsb.c, zm.c, zmr.c, zmodem.h Unix source
files
/tmp/szlog stores debugging output (sz -vv)
TTTTEEEESSSSTTTTIIIINNNNGGGG FFFFEEEEAAAATTTTUUUURRRREEEE
The command "sz -T file" exercises the AAAAttttttttnnnn sequence error
recovery by commanding errors with unterminated packets.
The receiving program should complain five times about
binary data packets being too long. Each time sssszzzz is
interrupted, it should send a ZDATA header followed by
another defective packet. If the receiver does not detect
five long data packets, the AAAAttttttttnnnn sequence is not
interrupting the sender, and the MMMMyyyyaaaattttttttnnnn string in sssszzzz....cccc must
be modified.
After 5 packets, sssszzzz stops the "transfer" and prints the
total number of characters "sent" (Tcount). The difference
between Tcount and 5120 represents the number of characters
stored in various buffers when the Attn sequence is
generated.
NNNNOOOOTTTTEEEESSSS
When using TrailBlazer or other buffered modems at high
speed, particular attention must be paid to flow control.
The modem and Unix must agree on the flow control method.
Sz on USG (SYS III/V) systems uses XON/XOFF flow control.
If flow control cannot be properly set up, Try a "-w 2048"
option to enforce protocol level flow control. Experiment
with different window sizes for best results.
Telebit modems must not be set to "spoof" UUCP, XMODEM, or
KERMIT. Setting one of these spoofing modes interferes with
Page 5 (printed 10/30/91)
SSSSZZZZ((((1111)))) OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))) SSSSZZZZ((((1111))))
other protoocls.
If a program that does not properly implement the specified
file transfer protocol causes _s_b to "hang" the port after a
failed transfer, either wait for _s_b to time out or keyboard
a dozen Ctrl-X characters. Every reported instance of this
problem has been corrected by using ZCOMM, Pro-YAM, DSZ, or
other program with a correct implementation of the specified
protocol.
Many programs claiming to support YMODEM only support XMODEM
with 1k blocks, and they often don't get that quite right.
XMODEM transfers add up to 127 garbage bytes per file.
XMODEM-1k and YMODEM-1k transfers use 128 byte blocks to
avoid extra padding.
YMODEM programs use the file length transmitted at the
beginning of the transfer to prune the file to the correct
length; this may cause problems with source files that grow
during the course of the transfer. This problem does not
pertain to ZMODEM transfers, which preserve the exact file
length unconditionally.
Most ZMODEM options are merely passed to the receiving
program; some programs do not implement all of these
options.
Circular buffering and a ZMODEM sliding window should be
used when input is from pipes instead of acknowledging
frames each 1024 bytes. If no files can be opened, sssszzzz sends
a ZMODEM command to echo a suitable complaint; perhaps it
should check for the presence of at least one accessible
file before getting hot and bothered.
BBBBUUUUGGGGSSSS
On at least one BSD system, sz would abend it got within a
few kilobytes of the end of file. Using the "-w 8192" flag
fixed the problem. The real cause is unknown, perhaps a bug
in the kernel TTY output routines.
The test mode leaves a zero length file on the receiving
system.
Page 6 (printed 10/30/91)