Threading is a whole new kettle of fish and wouldn't completely fix the problem anyway -- you'd still need to mess with the terminal settings. You can do reads without blocking anyway, though it means changing your terminal settings and using the unix read() or select() call instead of stdio calls or iostream objects. Letting you do what you want in a loop.
Using system("stty") is a bit of a hack but works fine. It alters terminal settings for stdin, which are global to a terminal, i.e. if you don't reset your terminal after your program quits you'll still have weird settings! If you want to take a look at how stty actually works, you can see my examples tcgets.c and tcgets.h. That's code for using a serial port but as far as UNIX is concerned, all terminals are serial ports...
Last edited by Corona688; 11-26-2010 at 12:38 PM..
hey guys!
I am on a fedora core2 i686 with gui and I have a miniture cool-cam which is digital.. it connects through regular usb.. the system recognizes it and the when I go into the desktop peripheral and go to camera it gives name and tells test was successful.. it also says that the camera has... (0 Replies)
Hi Everyone,
I am a student learning C and Unix. I want to create a shell in C
which accepts command line arguments and executes them.
I am not sure how to do this. Any help would be greatly appreciated.
Thanks (5 Replies)
Hi All,
Well i m a taking an operating system course (newbie to unix)
we have studied till now: the fork () execv()
the teacher asked us to create a mini shell that execute a user command:
cmd1
he said everything in is optional we can use any combination
Well dudes , i m really... (2 Replies)
Hi All,
I have Mac mini, I bought DVI to HDMI cable and connected this to TV and sounds didn't come.
On the Sony TV, right below VGA, I see mini-port plug in. I then connected VGA cable from Mac to Sony TV, I can see every thing. but for the sound, should I buy mini-port to mini-port cable.... (1 Reply)
1.) I am to write scripts that will be phasetest folder in the home directory.
2.) The folder should have a set-up,phase and display files
I have written a small script which i used to check for the existing users and their password.
What I need help with:
I have a set of questions in a... (19 Replies)
Hi Experts,
I'm a newbie.....just now i started to write some simple scripts on my own. Can anyone suggest me any simple project kind of stuff to hone my SHELL SCRIPTING skills....which involves database connection and more than that.....bcoz i already tried to write a script which connects to... (0 Replies)
Hi All,
I want to make something like described below -
"Double click on an executable file that will check the health status and other things of various linux servers and send an email to a list of people."
I can make shell scripts for individual servers but how to make a script that will check... (1 Reply)
Discussion started by: csrohit
1 Replies
LEARN ABOUT SUSE
droplang
DROPLANG(1) PostgreSQL Client Applications DROPLANG(1)NAME
droplang - remove a PostgreSQL procedural language
SYNOPSIS
droplang [ connection-option... ] langname [ dbname ]
droplang [ connection-option... ] [ --list ] [ -l ] dbname
DESCRIPTION
droplang is a utility for removing an existing programming language from a PostgreSQL database. droplang can drop any procedural language,
even those not supplied by the PostgreSQL distribution.
Although backend programming languages can be removed directly using several SQL commands, it is recommended to use droplang because it
performs a number of checks and is much easier to use. See DROP LANGUAGE [drop_language(7)] for more.
OPTIONS
droplang accepts the following command line arguments:
langname
Specifies the name of the backend programming language to be removed.
[-d] dbname
[--dbname] dbname
Specifies from which database the language should be removed. The default is to use the database with the same name as the current
system user.
-e
--echo Display SQL commands as they are executed.
-l
--list Show a list of already installed languages in the target database.
droplang also accepts the following command line arguments for connection parameters:
-h host
--host host
Specifies the host name of the machine on which the server is running. If host begins with a slash, it is used as the directory for
the Unix domain socket.
-p port
--port port
Specifies the Internet TCP/IP port or local Unix domain socket file extension on which the server is listening for connections.
-U username
--username username
User name to connect as.
-w
--no-password
Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as
a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to
enter a password.
-W
--password
Force droplang to prompt for a password before connecting to a database.
This option is never essential, since droplang will automatically prompt for a password if the server demands password authentica-
tion. However, droplang will waste a connection attempt finding out that the server wants a password. In some cases it is worth
typing -W to avoid the extra connection attempt.
ENVIRONMENT
PGDATABASE
PGHOST
PGPORT
PGUSER Default connection parameters
This utility, like most other PostgreSQL utilities, also uses the environment variables supported by libpq (see in the documentation).
DIAGNOSTICS
Most error messages are self-explanatory. If not, run droplang with the --echo option and see under the respective SQL command for details.
Also, any default connection settings and environment variables used by the libpq front-end library will apply.
NOTES
Use createlang(1) to add a language.
EXAMPLES
To remove the language pltcl:
$ droplang pltcl dbname
SEE ALSO createlang(1), DROP LANGUAGE [drop_language(7)]
Application 2010-05-14 DROPLANG(1)