Read files in shell script code and run a C program on those files
HI,
I am trying to implement a simple shell script program that does not make use of ls or find commands as they are quite expensive on very large sets of files. So, I am trying to generate the file list myself. What I am trying to do is this:
1. Generate a file name using shell script, for example, 1.dat, 2.dat,..., so on.
2. Call a C program within the for-loop in that shell program. The C program reads the file name in argv [ 1 ], which is defined within the program.
3. Loop until all files have been read by the C program.
This is what I have done.
My original shell script was this:
Code:
ls -1 *.dat | while read page
do
c_program.out $page>$page.txt
done
rename .dat.txt .dat *.dat.txt
But the above script is very slow when the number of files is really really big. SO I am now trying to do this:
Code:
for i in {1..5}
do
var=`$i.dat`
c_program.out $var > $i.txt
done
rename .txt .dat *.txt
But when I run the shell script, I get the following errors:
Code:
shelll_script.sh: line 3: ./1.dat: Permission denied
shelll_script.sh: line 3: ./2.dat: Permission denied
shelll_script.sh: line 3: ./3.dat: Permission denied
shelll_script.sh: line 3: ./4.dat: Permission denied
shelll_script.sh: line 3: ./5.dat: Permission denied
Hi,
I need to generate a test data file by reading inputs from multiple files.
A sample pseudo code for this program to read from three files and write to a output file would be like:
open(OUTPUTFILE, "data");
open(INFILE1, "data1");
open(INFILE2, "data2");
open(INFILE3, "data3");
... (1 Reply)
suppose have different files
1.1
2.2
3.3
4.4
5.5
All the files have to run under the same command say
tr -d '\n'
so how to run all the files under the same command by using shell script (3 Replies)
Hi all,
I have to generate some report from shell script .We have stacktrace log file which generate hourly basis.
So now my q is that how this shell script will read all stacktrace log file for particlular day and parse accordingly desire output.
Any help or suggestion as i am newbie with... (1 Reply)
hi Friends,
Please help me in writing shell script to run list of sql files.
database is Oracle 9i,
unix os is solaris
Requirement is
1. sql file must take two inputs a)feed id and b)business date
2.shell script must out put .xls or .csvfile as out put without trimming any column name and... (1 Reply)
Hi,
Below is my issue which I desperately need and I want a shell script which can do this job.
I need this script as I m planning to put this for a system health check. Please assist me.
1. There are 10 log files in a particular location.
2. open each log file. Goto to the end of the... (4 Replies)
I have a local linux machine in which the files are dumped by a remote ubuntu server. If the process in remote server has any problem then empty files are created in local machine. Is there any way using perl script to check if the empty files are being created and delete them and then run a shell... (2 Replies)
Hi,
Can any one tell me if i can read two files in a shell script...
My actual requirement is to read the 1st text file and parse it to get the file code and use this file code to retrieve data from database and print the fetched data in the 2nd text file (I have parsed it and printed the... (2 Replies)
Hello,
So I have approximately 300 files of raw data (.txt) files that I am using to perform statistical analysis. I have been able to construct a Fortran program that is able to perform my statistical analysis on a file by file basis.
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Folks i have written two scripts that do reading of csv files , i am currently fetching the all part of the line in to variables and braking the line into several variables.
I am doing the same thing in an another shell script, i want to integrate both the scripts in to a single one where i can... (2 Replies)
Hi,
I am trying to write a shell script that will go to another folder and run the script in that folder. The folder structure is kind of like this:
/MainFolder/
|-> MainShellScript.sh
|
|-> Folder1/
|-----|-> script1.sh
|-----|-> FileToRun1.jar
|
|-> Folder2/
|-----|-> script2.sh... (3 Replies)
Discussion started by: sleo
3 Replies
LEARN ABOUT LINUX
unknown
UNKNOWN(1) General Commands Manual UNKNOWN(1)NAME
unknown - identify possible genotypes for unknowns
SYNOPSIS
A program to rapidly identify which genotypes are possible for individuals typed as unknowns in the input pedigree.
unknown [ -cl ]
DESCRIPTION
unknown infers possible genotypes and mating combinations for parents with unknown genotypes for ilink(1), mlink(1) and linkmap(1).
OPTIONS -c Use conditional allele frequencies.
-l Choose a good set of loop breakers automatically.
RETURN VALUE
0 Successful completion
ERRORS
10 File not found
255 Failure
EXAMPLES
Normally, unknown(1) is run immediately prior to its sister programs, ilink(1), mlink(1) and linkmap(1), like this:
unknown
mlink
FILES unknown(1) reads the two files pedfile.dat and datafile.dat as its own input and produces various temporary files that are used as input to
the next program. These temporary files are ipedfile.dat, upedfile.dat, speedfile.dat and newspeedfile.dat.
NOTES unknown(1) is part of the FASTLINK package, which is a re-implementation of the LINKAGE suite of computer tools that help investigate
genetic linkage as first proposed G.M. Lathrop, J.M. Lalouel, C. Julier, and J. Ott.
AUTHORS
Dylan Cooper, Alejandro Schaffer, and Tony Schurtz based on work originally by Jurg Ott, Ph.D, et. al.
This manual page was written by Elizabeth Barham <lizzy@soggytrousers.net> for the Debian GNU/Linux system (but may be used by others).
WORD-WIDE-WEB
http://www.ncbi.nlm.nih.gov/CBBResearch/Schaffer/fastlink.html
SEE ALSO ilink(1), linkmap(1), lodscore(1), mlink(1).
April 15, 2003 UNKNOWN(1)