10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hallo,
i have a script like:
if ;then
echo "OK"
else
echo "ERROR $2 is missing"
fi;
if ;then
touch $2
fi;
if ;then
cat $1 | grep xy > $2 (1 Reply)
Discussion started by: eightball
1 Replies
2. Shell Programming and Scripting
Good morning!
How do I make the info that someone inputs from @userArray = <STDIN>, a new array?
@userArray = <STDIN>;
while ()
{
chomp;
last if ! /\d/;
push(@userArray,$_);
}
my($sum,$avg) = &sumIt(@userArray);
print "Total:$sum\nAverage:$avg\n";
Im... (2 Replies)
Discussion started by: bigben1220
2 Replies
3. UNIX for Dummies Questions & Answers
Bit of a weird one i suppose, i want to use an echo inside an echo... For example...
i have a script that i want to use to take users input and create another script. Inside this script it creates it also needs to use echos...
echo "echo "hello"" >$file
echo "echo "goodbye"" >$file
... (3 Replies)
Discussion started by: mokachoka
3 Replies
4. UNIX for Dummies Questions & Answers
When a process fork(), the child share the same file descriptors as his father. Thus, they share the same stdin. Quick and dirty exemple below (sorry for the ugly gets() call) :
#include <stdio.h>
#include <unistd.h>
int main()
{
char buf;
if (fork()) { /*parent */
... (1 Reply)
Discussion started by: milouz
1 Replies
5. UNIX for Dummies Questions & Answers
Hi,
Program A: uses pipe()
I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using:
* child
-> dup2(fd, STDOUT_FILENO);
-> execl("/path/PROGRAM B", "PROGRAM B", NULL);
* parent
-> char line;
-> read(fd, line, 100);
Question:
---------... (3 Replies)
Discussion started by: vvaidyan
3 Replies
6. Programming
Hi,
Program A: uses pipe()
I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using:
* child
-> dup2(fd, STDOUT_FILENO);
-> execl("/path/PROGRAM B", "PROGRAM B", NULL);
* parent
-> char line;
-> read(fd, line, 100);
Question:
---------... (1 Reply)
Discussion started by: vvaidyan
1 Replies
7. Shell Programming and Scripting
Hi,
I'm having trouble with my script. I have to select different choices without any interaction from a menu that looks like :
a - xxxxxxxxxxxxxx
b - xxxxxxxxxxxxxx
c - xxxxxxxxxxxxxx
d - xxxxxxxxxxxxxx
I tried things like :
echo "a" >&0
read < echo "a"
but none worked. Any... (4 Replies)
Discussion started by: flame_eagle
4 Replies
8. Shell Programming and Scripting
Hi all,
Consider the following situation:
- you launch an compiled binary application from inside a unix shell which presents a text-based type user interface where you can input information ...
# echo "I am the $SHELL shell"
# I am the /bin/bash shell
# ./input
# ... imagine the binary... (3 Replies)
Discussion started by: domivv
3 Replies
9. Shell Programming and Scripting
can you redirect STDIN with command arguments?
I have tried this approach:
# ./script -option <argument1> <argument2> 0<$2
# $2: ambiguous redirect
Is this possible? (4 Replies)
Discussion started by: prkfriryce
4 Replies
10. Programming
hi,
how does a program know whether some data are available from stdin?
I would like to make a program which could read its data from stdin
and _if_there_is_nothing_at_stdin_ from a file which name is given
as an argument. If there is nothing in stdin and no filename is given as
argument,... (2 Replies)
Discussion started by: marquis
2 Replies