1. Shell Programming and Scripting

I am using pipes (specifically piping out) in Perl to put an array from one file into an array in a different file. I can't figure out how to transfer the array. I kow how to open the pipe : open (FILEHANDLE, "| file") or die~ but how do I transfer the array. I think it has something to do with... (1 Reply)

2. Programming

Hi, I am trying to write a program that will pipe any number of programs together like in the linux shell. As an example, the below code tries to execute "cat data | grep int | cut -b 1-10." The problem is that the programs never get executed for some reason. It seems like the first program... (3 Replies)

3. Shell Programming and Scripting

I've got a file with lots of commands I want to run in it. They're formatted like so: cp /path/to/file /path/to/new/file and on and on and on. Hundreds of them. Anyways, I'd like to execute them one at a time, then check what time it is, and repeat this process until 7am. I can... (3 Replies)

4. Programming

Hi, To explain this question I will have to go into a bit of detail. I hope you don't mind. currently I have a log handler (an already compiled c++ version) and what it does is makes a log file and writes all the unix output (echo, etc) of a script to that log file. To me the log_handler is... (3 Replies)

5. Programming

Hi, I'm trying to wrap my head around piping in C - I've got a small C program that forks and pipes stuff from the child process to the parent process. Currently the child process calls a C program that squirts out random numbers which then pipes the result to the parent process. The... (0 Replies)

6. UNIX for Dummies Questions & Answers

Hi, I need to use a double grep so to speak. I need to grep for a particular item say BOB and then for each successful result I need to grep for another item say SMITH. I tried grep "BOB" filename | grep "SMITH" but it does not seem to work. I can achieve my desired result using an... (12 Replies)

7. Shell Programming and Scripting

#ksh Here is my code: ERRORLIST="43032 12001 12002 12003 12004 34019 49015 49016 49017 49018 49024 49025 49026 58004 72003 12005 12006 12007 12008 12011 12012 16024 16023" for ERROR in ${ERRORLIST} do awk -v l="$lastdate" '/^....-..-../&&$0>l{d=$0}d&&/Error: '"${ERROR}"'/{print... (3 Replies)

8. Ubuntu

Hi everybody, I have a big file with blast results (if you know what this means, otherwise look at it just as a text file with a specific form). I am trying to extract some ids from within this file, which have certain parameters. For example, some Of my IDs have the term 'No hit results'... (1 Reply)

9. Shell Programming and Scripting

Hi , I have following code in my shell script : "$TS_BIN/tranfrmr" "${TS_SETTINGS}/tranfrmr_p1.stx" "${TS_LOGS}/tranfrmr_p1.err" | ( "$TS_BIN/cusparse" "${TS_SETTINGS}/cusparse_p2.stx" "${TS_LOGS}/cusparse_p2.err" | ( "$TS_BIN/tsqsort" "${TS_SETTINGS}/srtforpm_p3.stx"... (8 Replies)

10. Homework & Coursework Questions

Hey guys. I'm very new to Unix. I'm pretty fluent in Java and C, but I have never actually used Unix for anything. I am in an Operating Systems course now and I have an assignment to write a piece of code that involves forks and piping. I'm stuck. 1. The problem statement, all variables and... (6 Replies)