The thing is that sometimes I need to filter an arbitrary output given a condition (think on the "filter" function present on some programming languages) from the shell (I use sh/bash). I tried this:
And now, if I want to get all the non-executable files under /etc, I can run this:
So the question is... is there any better/faster way of doing this generic filter with sh/bash?
;) Hello,
i have written a mail previously but now i have written a script to monitor the status of the unix system process,in which i redirect the out put to file now i have a problem filtering the process that are running and stopped. in fact i want to filter for the processes that have... (6 Replies)
Hello,
On my machine, all mail is stored in my /var/spool/mail.
IS there a way to direct all mail that goes there into a namep pipe?
Thank you,
Dado (4 Replies)
I have to grep a pattern. scenario is like :-
Suppose "/etc/sec/one" is a string, i need to check if this string contains "one" using any utility
something like
if /etc/sec/one | grep ; then
Thanks in advance
Renjesh Raju (3 Replies)
Hi all,
I have some files with different extensions. I want to list the files that doesnt end with particular extension for eg .txt. I want to list all files except .txt. How can I do the same?
Thanks
Ananth (2 Replies)
Hi!!
I have a bit of a task here and filtering/scripting not my strongest. I have to collect info of approx 1100 hdiskpower.so i have appended all the hdisk into a text file and i need it to run the command lscfg -vl to confirm if the drive is symmetrix. here's what i have so far
at... (3 Replies)
Hi
I am interested in DNS resolving a set of sites and each time the output is different-
$ host www.yahoo.com
www.yahoo.com is an alias for fd-fp3.wg1.b.yahoo.com.
fd-fp3.wg1.b.yahoo.com is an alias for ds-fp3.wg1.b.yahoo.com.
ds-fp3.wg1.b.yahoo.com is an alias for... (1 Reply)
Hi experts,
I have a file image.csv as below:
COMPUTERNAME,23/07/2013,22/07/2013,21/07/2013,20/07/2013,19/07/2013,18/07/2013,17/07/2013
AED03852180,3,3,3,3,3,3,3
AED03852181,3,3,3,3,3,3,1
AED09020382,3,0,3,0,3,3,3
AED09020383,1,3,3,3,2,1,3
AED09020386,3,3,0,3,3,0,3 ... (4 Replies)
Hi guys,
I need to know how i can ignore Pipe '|' if Pipe is coming as a column in Pipe delimited file
for eg:
file 1:
xx|yy|"xyz|zzz"|zzz|12...
using below awk command
awk 'BEGIN {FS=OFS="|" } print $3
i would get xyz
But i want as :
xyz|zzz to consider as whole column... (13 Replies)
Discussion started by: rohit_shinez
13 Replies
LEARN ABOUT ULTRIX
popen
popen(3) Library Functions Manual popen(3)Name
popen, pclose - initiate I/O to/from a process
Syntax
#include <stdio.h>
FILE *popen(command, type)
char *command, *type;
pclose(stream)
FILE *stream;
Description
The arguments to are pointers to null-terminated strings containing respectively a shell command line and an I/O mode, either "r" for read-
ing or "w" for writing. It creates a pipe between the calling process and the command to be executed. The value returned is a stream
pointer that can be used (as appropriate) to write to the standard input of the command or read from its standard output.
A stream opened by should be closed by which waits for the associated process to terminate and returns the exit status of the command.
Because open files are shared, a type "r" command may be used as an input filter, and a type "w" as an output filter.
Diagnostics
The routine returns a null pointer if files or processes cannot be created, or the shell cannot be accessed.
The routine returns -1 if stream is not associated with a `popened' command.
Restrictions
Buffered reading before opening an input filter may leave the standard input of that filter mispositioned. Similar problems with an output
filter may be forestalled by careful buffer flushing, for instance, with For further information, see
The routine always calls and never calls
See Alsosh(1), pipe(2), wait(2), system(3), fclose(3s), fopen(3s)popen(3)