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UNIX for Dummies Questions & Answers
File Handling
Post 302760945 by Yoda on Thursday 24th of January 2013 10:28:07 PM
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10 More Discussions You Might Find Interesting
1. Programming
Hi all,
I have a problem in handling files through C.
here is the problem im having:
i will query the database (for instance consider employees table )
for empno,ename,job,salary fields.The query returns me some 100 of rows. now i need to place them in a file in row wise pattern as they... (3 Replies)
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2. Programming
Hi all,
I got a little issue here. Imagine that I have more than one process accessing one file. Is it possible to know which process(es) are accessing that file when I open the file??
Thanks for the help.
Best regards,
Ernesto (2 Replies)
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Hi,
I have a log file which runs into 3 to 5 GB.
We store this typically for 6 months. When a new month starts we move the previous month into a 9 month back up log (file.9m) and delete the last month of the 9 month back up.
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sir i have to get first line from a file
for example
>cat file1
abc
zxc
asd
adsf
from that file1 i need only first line
expected result
>abc
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my input for a script is another csv file
but in that file say 7 lines are there ...
how can i get line by line to that input
for example :
>cat link.csv
www.yahoo.com,yahoo
www.google.com,google
www.unix.com,unix
another file
in that file i need to ping the above links
... (2 Replies)
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6. Shell Programming and Scripting
I have been doing automation of daily check activity for a server, i have been using sqls to retrive the data and while loop for reading the data from the file for several activities. BUT i got a show stopper the below one.. where the data is getting store in $temp_file, but not being read by while... (1 Reply)
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7. Programming
$# some text
$$ some text
$@ some text
$$. some text
Mg1 some text
Mg2 some text
.
.
.
Mg10 some text
The above 10 lines are to be extracted except the lines starting from $#,$$.,... (4 Replies)
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Specifically on RHEL 5.7.
When does the underlying ksh process open and close files? Every time they're accessed, or as little as possible?
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CreateFiles()
{
grep "<VALUE1>" ${infile} >> ${outfile}
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...... (4 Replies)
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I have a file
1
298167
298168
1093209
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1422663
I want to write a code where in I want to read contents of above file
like first read is 1
second read is 298167
Substract second read from first and if this is greater than or less than 99,999.
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Hi All,
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#L 0.000017 4.329939 0.000017 4.716267 r7.9 P 1 1;Net=IN32
The extracted data should be IN32. Could anyone help to script in c shell.? (4 Replies)
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LEARN ABOUT DEBIAN
ns_tmpnam
ns_tmp(3aolserver) AOLserver Built-In Commands ns_tmp(3aolserver) __________________________________________________________________________________________________________________________________________________ NAME
ns_mktemp, ns_tmpnam - commands SYNOPSIS
ns_mktemp template ns_tmpnam _________________________________________________________________ DESCRIPTION
ns_mktemp returns a unique filename based on the template you specify. ns_tmpnam returns a filename that can safely be used for a tempo- rary file. The template for ns_mktemp should contain a string with six trailing Xs, which will be replaced with an alpha-numeric string of six charac- ters chosen to make the filename unique. If template does not end with six trailing Xs the empty string will be returned. ns_tmpnam calls the tmpnam() C library function, and the results will depend on your operating system. On Irix, for example, tmpnam() always generate a file name using the path-prefix defined as P_tmpdir in the header file which is "/var/tmp/". EXAMPLES
nscp> ns_tmpnam ;# On Linux /tmp/filevuLwaE nscp> ns_mktemp /tmp/foobar.XXXXXX /tmp/foobar.p6SlaC SEE ALSO
nsd(1), mktemp(3), tmpnam(3) KEYWORDS
AOLserver 4.0 ns_tmp(3aolserver)