10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
when I try to redirect input and the command is described as a string within an array redirection does not work. why?
#!/bin/bash
dir=("tail < ./hello.txt")
tail < ./hello.txt #works
${dir} #does not work (2 Replies)
Discussion started by: heinzel
2 Replies
2. Shell Programming and Scripting
Hi,
#!/bin/bash
while ;
do
rm -f /tmp/pipe
mkfifo /tmp/pipe
./yuv4mpeg_to_v4l2 < /tmp/pipe &
mplayer tom_and_jerry.mp4 -vf scale=480:360 -vo yuv4mpeg:file=/tmp/pipe
sleep 65;
done
When I run this - after mplayer finishes playing video it says - Exiting... (End of... (2 Replies)
Discussion started by: ashokvpp
2 Replies
3. UNIX for Dummies Questions & Answers
Can someone please explain when input redirection is necessary?
For example, "cat filename" and "cat< filename" produce the same result. I was told that if I need to bunzip a file that I should type "bunzip2<filename.bz2." However, if I omit the "<" I still get the same result. Can someone... (4 Replies)
Discussion started by: PTcharger
4 Replies
4. UNIX for Dummies Questions & Answers
Hello,
I'm new to Unix (working with OS X 10.8.5) and therefore at the beginning of my adventure. If I ask something stupid, then this is not intentional, but simple nescience. :rolleyes:
I have a problem with the redirection of text file content to echo. I was experimenting with redirection... (6 Replies)
Discussion started by: pseudo
6 Replies
5. Shell Programming and Scripting
All,
I have a requirement to write a script where I check for Input redirection when the script was executed, based on which I handle my logic. Below is the example:
my.script
#! /bin/ksh
# Not sure how to frame the if condition below
if ; then
echo "Input Redirected from a file"
... (7 Replies)
Discussion started by: bharath.gct
7 Replies
6. Shell Programming and Scripting
Hello,
I need help with a bash script that I try to improve. I could not find answer so far, maybe because I'm not to familiar with the terminology so feel free to correct my language.
I have a script that looks like:
NODES="node_a node_b node_c"
for NODE in $NODES
do
... (4 Replies)
Discussion started by: pn8830
4 Replies
7. UNIX for Dummies Questions & Answers
There are two files named goody and good. Please look at their single line contents:-
$ cat goody
hi m goody
$ cat good
hi m good
1)
$ cat goody < good
hi m goody
When we give cat, a file to read from, standard input is ignored.
As such, the above operation will just display contents... (2 Replies)
Discussion started by: marconi
2 Replies
8. Shell Programming and Scripting
while running a user inter-active program
how can we get the commands from a
file instead of the user?
is there anyway to permanently redirect content
of a file to standard input? (6 Replies)
Discussion started by: gfhgfnhhn
6 Replies
9. Shell Programming and Scripting
Hi,
in my script I need to execute the following command:
query $id 456 432
but it waits for a RETURN character from keyboard and therefore, it fails. I tried something like:
query $id 456 432 << '\n'
but, i'ts clear it is not correct. Is there any way to do this?
Thxs. (0 Replies)
Discussion started by: luistid
0 Replies
10. UNIX for Dummies Questions & Answers
Hi everybody, first of all i am a new member in UNIX.com and this is my first post.
I am impressed with the amount of information a person can ever have in this forum, it is really great having something similiar; anyways let me tell you about the problem I am having, hope you will answer me.... (6 Replies)
Discussion started by: majeed73
6 Replies
