FCALL(3) Library Functions Manual FCALL(3)NAME
fcall - recreate packet delimiters
SYNOPSIS
Fctlfd = open(".../ctl", ORDWR);
Fwrite(ctlfd, "push fcall", 10);
DESCRIPTION
Fcall is a stream module (see stream(3)) that can be pushed onto a connection to a 9P file server. The function of the module is to recre-
ate packet delimiters lost in transmission. The 9P protocol demands that network connections preserve delimiters between messages written
to the file server. Stream based protocols, like TCP, are unable to preserve delimiters. The delimiters must be recreated by the receiver
before a packet is read by a file system.
Fcall examines a data stream and identifies 9P messages from their type. The length of the message is computed from the header. Data is
collected and buffered by the stream module until an entire 9P message has been assembled. A single message is then delimited and sent
upstream to be read by a file server.
SEE ALSO stream(3), ip(3), exportfs(4), srv(4)SOURCE
/sys/src/9/port/stfcall.c
FCALL(3)
Check Out this Related Man Page
STREAM(3) Library Functions Manual STREAM(3)NAME
stream - a structure for communications
SYNOPSIS
bind streamdevice dir
dir/data
dir/ctl
DESCRIPTION
A stream is not a device per se. However, many devices use the streams package in the kernel to implement communications channels. The
properties described here are common to all such channels.
All streams are represented by two standard files, ctl and data, plus any others the particular device wants to add. Reading and writing
the data file receives and sends data on the channel. If the channel is message oriented, each write will represent a message and each
read will return at most one message. If the buffer given in a read is smaller than the message, subsequent reads will return the remain-
der of the message.
Writing textual command strings to the ctl file performs control operations on the stream. The strings need not be null-terminated. Each
device may add to the control operations. The common control operations are:
hangup Hang up this stream. Any subsequent writes will return an error. The first subsequent read will return 0. All following
ones will return an error.
push name Push the module name onto the top of the stream.
pop Pop the top module off the stream
Reading the ctl file returns a textual identifier for the stream. This is used by multiplexed devices and its use is described with the
particular device.
SEE ALSO pipe(3), dk(3), cons(3), async(3), fcall(3), ip(3), reboot(3)SOURCE
/sys/src/9/port/st*.c
STREAM(3)
Hello,
I have data in a file something like this -
UNB+UNOA:1+006415160:1+AR0000012360:ZZ+080701:0552+2++DELFOR++++T'UNH+2+DELFOR:D:97A:UN
Here, the delimiters used are + , : and ' . I have a set of such files in which these delimiters vary from one file to another.
I am developing a... (4 Replies)
Hi,
I have a pipe delimited file with 1 million records. I need to validate each line by counting the number of delimiters, if any line fails to have the specified number of delimiters, taat line has to be sent to a reject file.
Kindly suggest.
if code provided, it is highly appreciated, and... (22 Replies)
I try order the content from file by delimiters.
This is the text:
interface Loopback0
description !!!RID RR_SLT
ip address 172.31.128.19 255.255.255.255
interface GigabitEthernet0
description !!!P_SLT GI0/0/9
ip address 172.31.130.246 255.255.255.252
and the result that I need... (11 Replies)
the data in my file is has no delimiters. it looks like this:
H52082320024740010PH333200612290000930 0.0020080131
D5208232002474000120070306200703060580T1502 TT 1.00
H52082320029180003PH333200702150001 30 100.0020080205
D5208232002918000120070726200707260580T1502 ... (3 Replies)
Hello,
I need use comma and spaces as field delimiters, but I can't:
text:
hello myfriend,I need,some help
I need something like:
awk -F"<blank>|," '{print $1, $3}'
Thanks (3 Replies)
Hi Experts,
How to ignore any delimiters which is inside the quotes. in awk script.
I am having script which counts number of delimiters from the line now i need count delimiters only separators .
`grep "14" | cut -d"=" -f2` -F'~'if (NF-1 != v1) '
this command counts number of Tilde... (7 Replies)
I have a file having lines like:
14: <a="b" val="c"/>
18: <a="x" val="d"/>
54: <a="b" val="c"/>
58: <a="x" val="e"/>
I need to create a file with output:
14
d
54
e
So basically, for every odd line I need 1st word if delimiter is ':' and for every even... (14 Replies)
Hi ,
I have a number say 12345001 which needs to be parsed. Its a number that has no delimiters.I have to read the last three digits and then the rest of digits irrespective of the total length of the number. The digits then have to be swapped and changed to a fixed length. The fillers to be... (10 Replies)
Hi All. Thanks for your help in advance.
I have a requirement to examine the number of delimiters in each record of a file. If the record has the expected number of delimiters it should be passed into a 'good' file. If it does not, the record should be passed into a 'bad' file. I have been able... (8 Replies)
Hi,
I have a problem to concatenate the lines based on number of delimiters (if the delimiter count is 9 then concatenate all the fields & remove the new line char bw delimiters and then write the following data into second line) in a file.
my input file content is
Title| ID| Owner|... (4 Replies)
Hi,
I have a requirement where in I need to insert delimiters before the last column of the total delimiters is less than a specified number.
Say if the delimiters is less than 139, I need to insert 2 columns ( with blanks) before the last field
awk -F 'Ç' '{ if (NF-1 < 139)} END { "Insert 2... (5 Replies)
What to know the way to count the number of delimiters in each record by ignoring the escape delimiters.
Sample Data:
12345678|ABN\|XYZ MED CHEM PTY. LTD.|C||100.00|22|AB"C\|Corp|"XYZ|CDEF"|
I'm using awk -F'|' '{ print NF-1 }' command to find the number of delimiters. this command... (8 Replies)
Hi all,
I am trying to write a script for renaming some files and I can't understand how to replace a set of characters between delimiters with sed.
The current filename is:
<ID1>_<ID2>_<DATE>_<ID3>.PDF
And I need to get the following:
<ID1>_<ID2>_<DATE>_X01<ID2>.PDF
I have tried the... (5 Replies)
Hey guys,
I have a file that is delimited by | and I am trying to write a sed command to
convert this:
abc|def||ghi|jkl||||mnop
into this:
abc|def|-|ghi|jkl|-|-|-|mnop
The output I am getting out of:
sed -e "s/+//g" /tmp/opt.del > /tmp/opt2.del
is like:
... (9 Replies)
I can find and replace text when the delimiters are unique. What I cannot do is replace text using two NON-unique delimiters:
Ex.,
"This html code <text blah >contains <garbage blah blah >. All tags must go,<text > but some must be replaced with <garbage blah blah > without erasing other... (5 Replies)