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 > $2 (1 Reply)
Discussion started by: eightball
1 Replies
2. UNIX for Dummies Questions & Answers
Hello,
my C application under unix runs in redirecting stdin to a file.
Example:$appli1 <file1. This application waits often on a scanf().
But I would temporarely reassign stdin at the keyboard for waiting a user's answer. So I thought to add system("appli2"); in the code of appli1. In its... (4 Replies)
Discussion started by: cypleen
4 Replies
3. UNIX for Dummies Questions & Answers
Bonjour,
Mon application en C sous linux tourne en redirigeant stdin vers un fichier.
Exemple; $appli1 <file1.
PB: Je voudrais temporairement redonner la main au user sur le clavier.
Alors je pensais ajouter system("appli2"); dans appli1.
Dans son main() , appli2() fait seulement un... (1 Reply)
Discussion started by: cypleen
1 Replies
4. 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
5. 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
6. 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
7. Shell Programming and Scripting
can you redirect STDIN with command arguments?
I have tried this approach:
# ./script -option <argument1> <argument2> 0<$2
# $2: ambiguous redirect
Is this possible? (4 Replies)
Discussion started by: prkfriryce
4 Replies
8. Shell Programming and Scripting
Why doesnt echo output the contents of the file abc.txt as shown below ?
chid@athena:~$ cat abc.txt
sssss
chid@athena:~$ echo < abc.txt
chid@athena:~$ (6 Replies)
Discussion started by: systemsb
6 Replies
9. Shell Programming and Scripting
hello all,
I need to create a password change utility for a database. I need to gather at the command line the username, password and database sid. I have the program currently doing this. What I would like to do is not have the new password appear on the screen when I do my read command.... (2 Replies)
Discussion started by: whited05
2 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