You'd really need to base it upon some evaluation that you can control. You'd test the inputs, and based on behavior, you'd fork off in whatever direction you need. The following function provides a similar test for logging purposes (with some additional chatter for documentation purposes):
Code:
function LOG
{
# Takes positional args or pipes...and print verbatim
# - eg: LOG $(date )
# LOG "something happening here... "
# echo "something happened - $(date )" |LOG
# Passive assignment of Debugging var...
${_dbg_mode:-}
# Arg count >0 means args given...
if [[ $# -gt 0 ]]
then
# If $MY_LOG is defined...
if [[ -n "${MY_LOG}" ]] \
&& [[ -f "${MY_LOG}" ]]
then
# tee to $MY_LOG...
print "${@}" >&1 2>/dev/null |tee -a "${MY_LOG}"
else
# just echo to screen...
print "${@}" >&1 2>/dev/null
fi
# No args means we're probably piping...
else
# If $MY_LOG is defined...
if [[ -n "${MY_LOG}" ]] \
&& [[ -f "${MY_LOG}" ]]
then
# tee to $MY_LOG...
read P
print "${P}" >&1 2>/dev/null |tee -a "${MY_LOG}"
else
# just echo to screen...
read P
print "${P}" >&1 2>/dev/null
fi
fi
}
Is there any possibility that a Stream Read and Write queues will interchange messages of any kind. If so what are the different possiblites and under what circumstances ?
Thanks in advance. (4 Replies)
how can i read a part of filename from the list in the script?
all file in directory...will start with "CDBACKUPFILE" then the name is stored in list.txt such as JOHN,MARRY,PETER. After this, is seq number.
CDBACKUPFILEJOHN00001
CDBACKUPFILEMARRY00004
CDBACKUPFILEPETER00003
I will use:... (3 Replies)
I have 3 columns in an excel sheet.
c1 c2 c3
EIP_ACCOUNT SMALL_TS_01 select A.* from acc;
All the above 3 col shoud be passed a variable in the unix code.
1.How to read an excel file
2.How to pass these data as variable to the unic script (1 Reply)
I'm running Debian ib Bash shell. currently I'm streaming the data from ttyS1 . The data stream is 13 fields comma delimited
cat /dev/ttyS1
02/04/2009,10:57:18,1401.0,7.5,424.9,0.0,0.0,159.8,1401.0,7.5,265.2,34.4,2.5
The data is grouped for specific systems.
02/04/2009,10:57:18 ... (1 Reply)
Hi:
I have a collection of mp3s and I need to create 1 xml file per mp3.
I have:
recording1.mp3
recording2.mp3
etc
and I want to generate this kind of files.
recording1.xml
recording2.xml
and inside each xml file I need to add a url prefix and then the filename at the end.
... (4 Replies)
Hi @all,
i really stuck in programming a tool with bidirectional process communication (popen(cmd, "rw") ... something like that ;-)).
Here is the code:
if(pipe(p_stdin) != 0 || pipe(p_stdout) != 0) {
fprintf(stderr, "Aufruf von pipe() schlug fehl.\n");
exit(1);
}
... (6 Replies)
Hi
I used this command:
mplayer http://host/axis-cgi/mjpg/video.cgi -user root -passwd root \
-cache 1024 -fps 25.0 -nosound -vc ffh264 \
-demuxer 3 -dumpstream -dumpfile output.avi It's ok but...
Video Playing is very fast! Why? Is it a synch problem?
What parameter I have to use for... (1 Reply)
Hi,
I have a text file containing numbers. There are up to 6 numbers per row and I need to read them, check if they are 0 and if they are not zero check if they are within a given interval (min,max). If they exceed the max or min they should be set to max or min respectively, if they are in the... (4 Replies)
Hello;
I have this rather tricky problem to solve --(to me, anyways) ..
I am processing the following one liner with tcpdump..
tcpdump -i T3501 -A ether host 00:1e:49:29:fc:c9 or ether host 00:1b:2b:86:ec:1b or ether host 00:21:1c:98:a4:08 and net 149.83.6.0/24 | grep --line-buffered -B... (5 Replies)
We have the data looks like below in a log file.
I want to generat files based on the string between two hash(#) symbol like below
Source:
#ext1#test1.tale2 drop
#ext1#test11.tale21 drop
#ext1#test123.tale21 drop
#ext2#test1.tale21 drop
#ext2#test12.tale21 drop
#ext3#test11.tale21 drop... (5 Replies)
Discussion started by: Sanjeev G
5 Replies
LEARN ABOUT HPUX
tee
tee(1) General Commands Manual tee(1)NAME
tee - pipe fitting to copy standard output to file
SYNOPSIS
[file]...
DESCRIPTION
The command transcribes the standard input to the standard output and makes copies in the files.
Options
This option ignores interrupts.
This option appends the output to the
files rather than overwriting the files.
EXTERNAL INFLUENCES
Environment Variables
determines the language in which messages are displayed.
If is not specified in the environment or is set to the empty string, the value of is used as a default for each unspecified or empty vari-
able. If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of
If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are set to "C". See
environ(5).
International Code Set Support
Single- and multibyte character code sets are supported.
RETURN VALUE
The command returns zero upon successful completion, or nonzero if the command fails.
EXAMPLES
Write a list of users to the screen and also append the list to the file
STANDARDS CONFORMANCE tee(1)