"pipe" in Tcl 8.5ff
Hi, I am looking for a replacement of the "pipe" command of tclx. This command creates a FIFO and returns one fd for reading and one for writing. A similar command in C is #include <unistd.h> int pipe(int pipefd[2]); How do I do that with plain Tcl (version >= 8.5)? Best regards Ole
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Στις 8/8/2013 2:38 μμ, ο/η Olе Streicher έγραψε: > Hi, > > I am looking for a replacement of the "pipe" command of tclx. This > command creates a FIFO and returns one fd for reading and one for > writing. A similar command in C is > > #include <unistd.h> > int pipe(int pipefd[2]); > > How do I do that with plain Tcl (version >= 8.5)? > > Best regards > > Ole > In tcl 8.6, with the "chan pipe" command. In tcl 8.5, with the tclpipe extension: http://wiki.tcl.tk/21637 If you need this for executing commands, see the man page for "open" and possibly "exec". George
petasisgHi George, George Petasis <petasisg@yahoo.gr> writes: > Στις 8/8/2013 2:38 μμ, ο/η Olе Streicher έγραψε: >> I am looking for a replacement of the "pipe" command of tclx. > In tcl 8.6, with the "chan pipe" command. In tcl 8.5, with the tclpipe > extension: > > http://wiki.tcl.tk/21637 Is there a way to do it in plain tcl, without the need to compile an external package? > If you need this for executing commands, see the man page for "open" and > possibly "exec". No; I need it to communicate between two processes that are [fork]ed. Best regards Ole
Hi George,
George Petasis <petasisg@yahoo.gr> writes:
> Στις 8/8/2013 2:38 μμ, ο/η Olе Streicher έγραψε:
>> I am looking for a replacement of the "pipe" command of tclx.
> In tcl 8.6, with the "chan pipe" command. In tcl 8.5, with the tclpipe
> extension:
>
> http://wiki.tcl.tk/21637
Is there a way to do it in plain tcl, without the need to compile an
external package?
One idea here would be to replace the tclx "pipe rfd wfd" with
set rfd open "|cat"
set wfd $rfd
if {[fork] == 0} {
puts $wfd "Hello world"
flush $wfd
close $wfd
exit
} else {
... read everything from the fork
close $rfd
}
> If you need this for executing commands, see the man page for "open" and
> possibly "exec".
No; I need it to communicate between two processes that are [fork]ed.
Best regards
Ole
Hi George,
George Petasis <petasisg@yahoo.gr> writes:
> Στις 8/8/2013 2:38 μμ, ο/η Olе Streicher έγραψε:
>> I am looking for a replacement of the "pipe" command of tclx.
> In tcl 8.6, with the "chan pipe" command. In tcl 8.5, with the tclpipe
> extension:
>
> http://wiki.tcl.tk/21637
Is there a way to do it in plain tcl, without the need to compile an
external package?
One idea here would be to replace the tclx "pipe rfd wfd" with
set fd open "|cat"
if {[fork] == 0} {
puts $fd "Hello world"
flush $fd
close $fd
exit
} else {
... read everything from the fork
close $fd
}
> If you need this for executing commands, see the man page for "open" and
> possibly "exec".
No; I need it to communicate between two processes that are [fork]ed.
Best regards
Ole
Στις 8/8/2013 3:45 μμ, ο/η Olе Streicher έγραψε:
> Hi George,
>
> George Petasis <petasisg@yahoo.gr> writes:
>> Στις 8/8/2013 2:38 μμ, ο/η Olе Streicher έγραψε:
>>> I am looking for a replacement of the "pipe" command of tclx.
>> In tcl 8.6, with the "chan pipe" command. In tcl 8.5, with the tclpipe
>> extension:
>>
>> http://wiki.tcl.tk/21637
>
> Is there a way to do it in plain tcl, without the need to compile an
> external package?
>
> One idea here would be to replace the tclx "pipe rfd wfd" with
>
> set fd open "|cat"
> if {[fork] == 0} {
> puts $fd "Hello world"
> flush $fd
> close $fd
> exit
> } else {
> ... read everything from the fork
> close $fd
> }
>
>> If you need this for executing commands, see the man page for "open" and
>> possibly "exec".
>
> No; I need it to communicate between two processes that are [fork]ed.
>
> Best regards
>
> Ole
>
I think a good example with open is here: http://wiki.tcl.tk/3543
You can use the channel returned by open for both reading & writting.
George
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Hello Partners, How are you ? Please find the requirements below. Title: Database/ETL Developer Duration: 6 months Location: NY Exp: 7+ Locals preferred Database/ETL requirements (Mandatory) Candidate must have worked with financial instruments, preferably Mutual Funds but, Equities are also ok. PL/SQL - packages, Stored procs, Functions, Aggregate functions, Pipelined Functions Informatica 8.6 - especially complex mappings, complex maplets, complex workflows, transformations Oracle 10g/11g Unix/Linux shell scripting ...
How to do PHP "require()" or TCL "source" in bash script
I'm sorry but I can't figure out how to explain this any better than this. In PHP we have a command "require()" that obtains a file and logically places it into another file. I cannot figure out how to do this in bash script as the requirement is necessary for a migration script to obtain the code from a .cfg file and then be able for the "parent" script to run the code it "imported" from the .cfg file, much like PHP's require() or TCL's "source". This is what I have so far and it fails: if [ -f ivc.cfg ]; then cat ivc.cfg fi Anyone...
Urgent need """""""""""INFORMATICA DEVELOPER"""""""""""""
Hello Partners, How are you ? Please find the requirements below. Title: Database/ETL Developer Duration: 6 months Location: NY Exp: 7+ Locals preferred Database/ETL requirements (Mandatory) Candidate must have worked with financial instruments, preferably Mutual Funds but, Equities are also ok. PL/SQL - packages, Stored procs, Functions, Aggregate functions, Pipelined Functions Informatica 8.6 - especially complex mappings, complex maplets, complex workflows, transformations Oracle 10g/11g Unix/Linux shell scripting Database/ETL requirements (Optional) Data warehousing experience Threading and job concepts in 10g/11g Cost based Optimizer concepts in 10g/11g Must : Experience with XML files and partitioning concepts in Oracle, Collections, Material Views Note : No phone calls please. : send Resumes to karthik@bhaninfo.com Thanks & Regards Karthik BhanInfo karthik@bhaninfo.com ...
"In" "Out" and "Trash"
I just bought a new computer and I re-installed Eudora Light on my new computer. But when I open Eudora, the "In", "Out" and "Trash" links are not on the left side of the screen the way they were on my old computer. How can I get these links back on the left side of the screen? Thank you. On 25 Mar 2007 09:49:22 -0700, "abx" <abfunex@yahoo.com> wrote: >I just bought a new computer and I re-installed Eudora Light on my new >computer. But when I open Eudora, the "In", "Out" and "Trash" links >are ...
A problem about "[ ]" "( )" "="
I want to read several images saved in a director,and give them to I1,I2 ,I3....,using the following codes: filelist=dir(['c:\MATLAB701\work\...\*.jpg']); for i=1 :length(filelist) I=imread(fullfile('c:\MATLAB701\work\...',filelist(i).name)); end; but failed. Then I used I(i)=imread... ,still failed. How could I do? "John" <mailofww@126.com> wrote in message news:ef19e12.-1@webx.raydaftYaTP... >I want to read several images saved in a director,and give them to > I1,I2 ,I3....,using the following codes: > filelist=dir(['c:\MATLAB701\work\.....
Does it need a ";" at the very after of "if" and "for"
write code like: int main(void) { int a=10; if(a<20) {} } Compiler ok on dev-cpp . don't we have to add a ";" after if statement? marsarden said: > write code like: > > int main(void) > { > int a=10; > if(a<20) > {} > } > > Compiler ok on dev-cpp . don't we have to add a ";" after if > statement? The syntax for 'if' is: if(expression) statement There is no semicolon after the ) but before the statement. The statement is either a normal statement (which can be empty), ending in a semicolon:- if(expr) ...
Looking for binary "expect" and "TCL/Tk" (if required) for OpenServer6
Does anybody know where to find "expect" (and related requirements) for OpenServer6? I can download the source files from nist.gov, but they do not compile. The MAN pages are already loaded on the system, so I suspect the programs would be on the distribution media somewhere. Any help would be appreciated. Thanks, Rick On 9 Feb, 17:57, Rick_Hoyle <motosl...@hotmail.com> wrote: > Does anybody know where to find "expect" (and related requirements) > for OpenServer6? I can download the source files from nist.gov, but > they do not compile. The MAN pages are al...
Select .. WHERE lang="nl" or lang="en"
Hi, I have a table `cities`: city_id countrycode languagecode name primary key (city_id, languagecode) I want fetch all cities with countrycode=3D"fr" and languagecode=3D"nl", If city_id in languagecode=3D"nl" not exists, I want fetch THIS city in languagecode=3D"en" EXAMPLE: city_id countrycode languagecode name: 1 fr en Paris 2 fr en Bordeaux 1 fr pl Pary=BF 2 fr pl (null OR '') countrycode=3D"fr" and languagecode=3D"pl": 2 fr en Bordeaux 1 fr pl Pary=BF Any ideas? dag wrote: > Hi, > > I have a table `cities`: > city_id > countrycode > languagecode > name > primary key (city_id, languagecode) > > I want fetch all cities with countrycode="fr" and languagecode="nl", > If city_id in languagecode="nl" not exists, I want fetch THIS city in > languagecode="en" > > > EXAMPLE: > city_id countrycode languagecode name: > 1 fr en Paris > 2 fr en Bordeaux > 1 fr pl Pary� > 2 fr pl (null OR '') > > countrycode="fr" and languagecode="pl": > 2 fr en Bordeaux > 1 fr pl Pary� > > > Any ideas? You said: 'If city_id in languagecode=... not exists, I want fetch THIS city in languagecode="en"' But in the example you have given, the city_id 2 with countrycode = "fr" and languagecode="pl" DOES exist, and yest yo...
What's wrong with "fconfigure stdout -encoding utf-8" on windows in Tcl 8.5.10
With my built 8.5.10 I tried to issue command "fconfigure stdout - encoding utf-8" to tclsh on WinXP, the tcl prompt then was shown as two dots instead of percentage sign, C:\>tclsh85t.exe % fconfigure stdout -encoding utf-8 =E2=80=A5date The current date is: 11/29/2011 Tue Enter the new date: (mm-dd-yy) time The system cannot accept the date entered. Enter the new date: (mm-dd-yy) =E2=80=A5 =E2=80=A5 So wonder what's wrong with fconfigure on stdout? Is that the issue? On Nov 29, 7:46=C2=A0am, "wrena...@gmail.com" <wrena...@gmail.com> wrote: > With my b...
How to open a pty from Tcl (or "please translate C example to Tcl")
Hello out there, still struggling with getting TCP/IP to work in my somewhat bizarre setup (TCP/IP over 10.000 Volt power-line modems) I got a hint to try to use a pseudo tty. I got the advice --- What you would do is write a small C program (or perl, or any of a number of other languages). This program would call the "openpty" function, which: - Locates the next available (unused) pseudo-TTY device in the system, - Opens both ends of it, into two different descriptors, - Returns the file-descriptor numbers for the two ends (the "slave" end which mimics a tty, and t...
Using "source" vs "package require" for Tcl application files
I would like to divide my Tcl application into separate files. Should I generally use "source" to combine the files, or should I use the package mechanism (package provide, package require, etc.)? What is the generally accepted practice? Thanks, Gregg On 30 dec, 01:04, GB <g...@invalid.invalid> wrote: > I would like to divide my Tcl application into separate files. Should I > generally use "source" to combine the files, or should I use the package > mechanism (package provide, package require, etc.)? > > What is the generally accepted practice? &g...
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