As you probably know, pipes block when you open one end of them until something opens the other end. As it's a redirection, p2 is opened by the shell before tee is even run -- and since the other end isn't open yet, it waits in the background. Our paste commands apparently open files in the order given, so it opens p1 first, which hasn't been opened since the shell's still waiting on p2, and deadlocks.
If you reverse the order in paste -- paste p2 p1 instead of paste p1 p2 -- then it works.
Hi I am having trouble with a script to export individual schemas to tape from an oracle database. Basicaly I need to export each shema through a pipe with compression and store each shema name in a file with the relevant tape marker. (4 Replies)
Hi...Can anyone please guide me on FIFO Pipes in UNIX.I have lerant things like creating fifo pipes,using them for reads and writes etc.I want to know what is the maximum amount of memory that such a pipe may have? Also can anyone guide me on where to get info on this topic from? (1 Reply)
Hi,
Please help me on this.
I am creating a named pipe in a kshell script.
I am using mkfifo pipe_name command to create the pipe.
I want to remove the named pipe after my work is completed.
How can i do that. (8 Replies)
hi,
i am working on a script for oracle export, m using a parameter file...
i want to compress the dump file that is generated..
in my script following is the code i have written.
i am not able to generata .gz file
mknod /tmp/exp_tesd1_pipe p
gzip -cNf... (4 Replies)
Hi,
I would like to process, filter the same ASCII asynchronous live data stream in more than one pipe pipeline.
So the one pipeline should filter out some records using grep key word
and more than one pipes pipelines
each should grep for another key words, each set seperately for each... (5 Replies)
Tried the following on Hpux 11.11, using both ksh, and dtksh
$diff <(sort file1) <(sort file2)
$ ksh: syntax error: `(' unexpected
Strange thing is I tried the same command under RHEL5 using ksh 93 and it works fine. Does anyone know if this is possible on HPUX without the use of... (0 Replies)
I'm not sure whether or not this question really belongs in this forum and will accept rebuke should I have mistakenly put it in the wrong place (hopefully the rebuke will be accompanied by an answer, though)
I wish to implement named pipe communication between two process using MKS Toolkit. I... (2 Replies)
why I cannot do this?
prog_name | tee logfile | awk /regexp/ | awk /regexp/ I now this is not elegant code, but am intrigued as to why multiple pipes from tee not allowed. (2 Replies)