Hi All,
I am trying to read data from two files and then compare them and only print the records on the screen that have a same ID.i.e TAGNO =CUSTOMERNO
For Eg
My Input Files are (a) Transaction (b) Customer detail
The data in file a is like:
TagNo Date Time Station... (0 Replies)
hi all,
I'm trying to resolve a scenario where we prompt the user to enter 1 or more disk names.
From there we would run a command on each disk which would give its location.
This would allow us to create a list of disks at location A, a list of disks at location B,....etc...
Any help... (1 Reply)
I have a file where i have files name with absolute path.
Ex: files.dat and contents are:
/root/xy/yz/zz/abc.txt
/root/xx/yy/zz/ac.txt
/root/xz/yz/zx/bc.txt
/root/xy/yz/zx/abcd.txt
now i want to create all above files(dummy files and can be 0 byte). i thought of using touch but it doesn't... (10 Replies)
Hello Everyone,
The situation is:
$ alias rm="sh abc.sh"
#abc.sh:
read input
echo "The input was: " $input
$ rm xyz.txt
should return
"The input was: xyz.txt"
Here, I want the alias "rm" to execute the file "abc.sh", where "abc.sh" should take "xyz.txt"... (1 Reply)
Hi
I used this command:
mplayer http://host/axis-cgi/mjpg/video.cgi -user root -passwd root \
-cache 1024 -fps 25.0 -nosound -vc ffh264 \
-demuxer 3 -dumpstream -dumpfile output.avi It's ok but...
Video Playing is very fast! Why? Is it a synch problem?
What parameter I have to use for... (1 Reply)
Hi,
I got a requirement to automate the process.
We have SLA files, there are some 80 SLA files comes from 1.30pm - 5.30pm.
I was asked to write a script to check for the SLA files in the load directory, if the files come then we got to send the mail to the group, if the mails doesnt come... (1 Reply)
Hello there, I am posting to seek help with a KSH script,
I am making a simple calculation program where the user can enter as many numbers as they like, I am getting their input using the read command, however I am not sure how to repeat doing this and storing the input in to new variables... (7 Replies)
Hi I'm trying to create a basic script that pauses for user input to verify a file name before generating the output.
I have numerous SSL certificate files which I am trying to determine the expiry date so what I'm trying to do is write a script so that is pauses to request the name of the .pem... (9 Replies)
Hi All,
I am really new to Linux.I am trying to write a script for creating a new directory by getting input of folder name from the user.Please help me in this regard.
#! /bin/bash
echo "Enter name of dir":$filename
mkdir -p $filename
When executing this I am getting following error
... (13 Replies)
Experts,
Need your help for this. Please support
My motive is to create seperate output file for each Input Files(File 1 and File2) in another folder say(/tmp/finaloutput)
Input files
File 1(1.1.1.1.csv)
a,b,c
43,17104773,3
45,17104234,4
File 2(2.2.2.2.csv)
a,b,c
43,17104773,1... (2 Replies)
Discussion started by: as7951
2 Replies
LEARN ABOUT ULTRIX
pclose
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)