Hi guys. Is it possible (I'm sure it is) to use the output of a simple 'ls' command as input of another command 'tail'.
It is not really the output of the 'ls'. I have to useeach line of the output.
This is the first command...
ls *myFile*021308*
Which it outputs many filenames. For each of those filenames I want to tail them
tail 1.myFlie_021308
tail 2.myFlie_021308
Thanks
Rodrigo
Here's another one if you kind of like the output/input style
This site has been very helpful thus far.. I thank you all in advance for sharing the knowledge. Let me get to it.
I am trying to write a very small script to take away from the boredom of doing the same thing over and over.
Everynow and again I have to get the hex value of a file using a... (2 Replies)
Hi,
I am triying to make sure that there exists only one file with the pattern abc* in path /path/. This directory is having many huge files. If there is only one file then I have to take its complete name only to use furter in my script.
I am planning to do like this:
if ; then... (2 Replies)
Hi folks,
Please advise which command/command line shall I run;
1) to display the command and its output on console
2) simultaneous to save the command and its output on a file
I tried tee command as follows;
$ ps aux | grep mysql | tee /path/to/output.txt
It displayed the... (7 Replies)
Hi guys...
I am new to this scripting...so please forgive me if anything worng in my questions...
here is my question..
I have file structure
/home/oracle/<sid>/logs/bkup
now i want to write a script which should grep the sid name from a file..and it should replace the <SID> with... (1 Reply)
I would appreciate any help.
I need to run 'ps -ef | grep 'process', get the process id and kill that process.
I have got this far:
- Get pid using ps -ef | awk '/process/{ print $2}'
after this I'm kind of stuck..
- Use pipe to redirect the output to kill
pid=ps -ef | awk '/bmserver/{... (2 Replies)
Hi All,
How do I provide the output of a command to another command which is waiting for an input from the user ?
Ex : I need to login to a device via telnet. In the script, initially I use the "read" command to get the IP Address, Username and Password of the device from the user. Now,... (1 Reply)
Hi,
I would like to know if this is possible, and if so what can i do to make this work.
I would like to grep a line X from fileA and then use the output to replace a word Y in fileB.
grep "line X" fileA | sed -e 's/Y/X/g' > outfile
this statement does not work, as i do not know how to... (7 Replies)
Hi All,
Hoping you can help as im in desperate need... I'm very new to unix scripting so apoligies,
I have setup an expect script in order to log into a node on our network, This will provide an output as per the below
*********** information:
*************: n/a
TEST IP : n/a
... (18 Replies)
Hello,
I'm using cygwin on my Windows 7 machine.
From the man pages of cut:
--output-delimiter=STRING
use STRING as the output delimiter the default is to use the input delimiter
I tried the following commands and got the error messages:
$ cut -c1-10,20-30 -d... (10 Replies)
I am using UNIX to create a script on our system. I have setup my commands to append their output to an outage file. However, some of the commands return no output and so I would like something to take their place.
What I need
The following command is placed at the prompt:
TICLI... (4 Replies)
Discussion started by: jbrass
4 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)