For the command below, I need to understand what exactly the command does and provide an examples for which the output will be saved to file save2... From my understanding, if the file provides an error in the first half of the pipe, it'll save to save1 and will never give an error to save to save2. I'm just confused as to what exactly would cause it to save anything to save2.
2. Relevant commands, code, scripts, algorithms:
Any help with this or if anyone can provide a tutorial that goes into examples using a combination of cat, pipes and file descriptors I would really appreciate it!
4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number:
Texas State University, San Marcos, TX, USA, Professor Quijun Gu, CS 4350
Moderator's Comments:
please use next time the full template, even if you believe to not enter in the orthodox form try your best, and dont forget to use for all code and data code tags , thanks
Assuming that the file memo is a non-empty text file containing:
and that there is no file named none, what output would you expect to get in the files named save1, save2, and letter if you were to run the pipeline:
? If you then actually run this pipeline with the input files set up as described above, did you get the output you expected? If not, what did you get and what did you expect to get?
I would start like I would in any human language: analyse the given phrase and see it composition, then would test the bits/blocks I understand.( or not...).
- how many processes have we here?
If more than one
what does the first - Can I test and se what it does
What should do the second - can I test? If not what am I expecting it to produce, then get the code working and see if I am right if not, why?
etc...
hello! why this works?
cd /home/user
cat * | ecasound -i stdin -o jack
and this doesn't?
cd /home/user/somedirectory
cat * | ecasound -i stdin -o jack
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Can we concatenate say,
I have a few files prefixing with 2009...
So now i want all the 2009 files into one single file..
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example: I have 3 files - filename.xxx.20110505.123030
filename.yyy.20110505.123030
filename.zzz.20110505.123030
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Hello,
I am trying to send text to a USB to serial adaptor and then to an external speech synthesizer. I tried using the cat and echo commands with no luck. I have gotten some audio output from my synthesizer using Kermit a terminal emulator, so I am pretty sure my synthesizer and my USB to serial... (1 Reply)
Hello Friends,
I have a question, i am trying to write a shell script in the bash shell.
#!/bin/sh
NAWK=/bin/nawk
AWK=/bin/awk
FIX_XML_PATH=/home/administrator/testfix/fix/
Y=`ls $FIX_XML_PATH | grep xml`
echo $Y
cat $Y
in this case when i do the echo $Y command it gives me the... (11 Replies)
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Im opening a file desciptor in perl and sending data using print CMD "$xyz".
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Can any body tell me when I put close(2), why the code does not show any out put?
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
int main(){
int fd1,fd2,fd3,fd4;
close(2);
fd1=open("test1.txt",O_WRONLY |O_CREAT | O_TRUNC,0744);
fprintf(stderr,"fd1 = %d\n",fd1);
... (5 Replies)