I want to define a simple error handler for a script. Image a script that does a few commands:
Code:
ls .
cd ..
touch ...
whatever, it doesn't matter. I want to define one error handler for the script, so if any of the steps error than the script is terminated and the error handler is run. I see the -e option to quit on errors, but I want a GOTO on errors.
I want my bash file to read from "input.dat" the two values emin emax. My input file looks like that:
#cat input.dat
!Energies
emin 10.00 !minimum energy
emax 30.00 !maximum energy
Now this seems to be not so hard with the command awk
#!/bin/bash
awk '{FS=" "}/emin/{print $2}' input.dat
awk '{FS=" "}/emax/{print $2}' input.dat
[code]....
So far so good. Now, I want to define two variables (e.g. e1,e2) in the bash file, so that their values would correspond to 00.00 and 30.00, as read from the input file. This one I have not found yet, thus asking for your advice. At the end, writing echo $e1 $e2, I should get 10.00 30.00 This is even harder to me: I want to replace the values emin,emax in a new file "modify.dat" which looks like that:
...
c---- energy interval
emin = 1.00
emax = 2.00
...
with the values e1 and e2 I have in my bash file. In other words, I want to call "modify.dat", find these two lines and replace the numeric values with the e1 and e2. At the end, my file should be like:
...
c---- energy interval
emin = 10.00
emax = 30.00
...
I recently installed openSUSE 11.3 (4 times, I think, which gives me always a new name for the "server" and in my terminal screen I continuously get this error: Message from syslcgd@linux-i4cz at Oct 12 06:21:57 ... kernel:[2866.05E384] do_IRQ: 0.91 No irq handler for vector (irq -1) the number after kernel: varies I then hit a few time son the [I]enter[I] key and then I get my linux prompt.
View 2 Replies View RelatedOdd that no posts come up in the search for "sox" or "specifically sox mp3"
How to get it up and going?
Which yum libraries need to be installed to get sox to recognize mp3s,
example: yum -y install force-mp3-to-start-working
its producing this error message: sox formats: no handler for file extension `mp3'
I have just installed the play command in my terminal and when I try to play an mp3 i get the error " no handler for file extension 'mp3' ".Am I required to create a default action that happens when an mp3 file is called, like opening and audio player, or do I just need to install some specific drivers?
View 5 Replies View Relatedmy computer doesn't get the internet, so I've tried to download what earlier threads write as the solution on another computer, but the other computer isn't linux, and it says that it doesn't recognize the file extension. Is there any way to download the "ubuntu-restricted-extras" thingy without it immediately trying to install?
(I have ubuntu 9.1, on a thinkpad t22(i think))
I'm sure this is a simple problem, however I am a newly reformed microsoft user (and it feels great).
When I try to watch wmv streams I get the error: No URI handler implemented for "mmsh".
I'm trying to create a new directory using the mkdir command.
Code:
home@ubuntu:~$ mkdir <aicoursework>
bash: syntax error near unexpected token `newline'
that's the error that i keep getting, what am i doing wrong?
The following problem occurs to me, I'm creating a distribution (as a class project) for my school (I'm studying telecommunications and computer systems). I am following, in order to create the distribution, the manual that you can find on this page: [URL] But when I get to write:
[Code]...
I am new to shell scripting, bash specifically.
I am trying to run the following script:
Code:
When trying to execute I always get this error:
Code:
In case you need to know the permissions. Here is it:
Code:
I run the script using the following command:
Code:
Ubunto is new to me when I try to play a movie I get the message, "no URI handler implemented for dvd".
View 1 Replies View RelatedHow can I set the handler without panel?
like when it's set to dso without panel
and next my qus is :
where is mod_cgi.so in whm panel ? i want edit this file but i can not found this file
I'd like to propose the following program, which I might write if nothing like this already exists. It would be similar to the "script" program in that it will allocate a new pty/tty pair and start a new session. But unlike the "script" program, it will provide a means to have BOTH the normal terminal session going AND a script or input source to provide input. It could be used, for example, to pre-start programs inside the pty session, and at the end, let the controlling tty it was started in fully interact with it (something that can't happen if it was started with input piped from the script).
My design would allow running a control script right from the beginning, or at any later time. The control script can see output from the session, filter that output for the controlling tty to see, provide input, maybe even filter the controlling tty input, too. When the script ends, the session can remain for regular interaction. Also, an environment variable will be set in the session to allow programs inside the session to provide similar controls, such as feeding input. That environment variable might be a local port number to connect to, with an access key or encryption key, to provide input and/or control commands.
I have several uses for this. Many of those uses could be done using other tools, but not all the uses would hit the same tools. But by doing it all in a program like this, I see a great many of my uses all solved in a single project, even if it isn't the most elegant (but I see solving many problems with one solution as being its own kind of elegant).
I am looking for a good audio session handler.
On ubuntu I have seen Ladish but it is a preview release.
Is there a good audio session handler for openSUSE.
http://ladish.org/wiki/demovideo
Assume: 1) Multi-cpu environment 2) Process that gets interrupted, is the same process that executes the interrupt handler, so I guess technically nothing gets interrupted except what the process was doing before, but it is still executing as it is executing the handler. 3) There is no top or bottom half, when an interrupt takes place the handler is invoked, executes, then return from interrupt, simple as that.
Why would sleeping the handler (puts in sleep queue, context switch to next runnable process) be a bad idea?
Is it possible to connect a signal handler to a variable?So when the variable changes the signal handler is called.I have a vector containing strings which i want to parse when there are one or more available strings in the vector
View 3 Replies View RelatedWhat is Fedora's best document organizer software? All the best, Novatian.
View 2 Replies View RelatedBasically I'm intending to write serial RX signal handler.Application receives defined packages of data over serial which contains header and payload. Handler should analyse incoming stream and upon detection of header (header is 6B in length) switches to receive payload of length defined in header, then after receiving full message packs it and sends to application for handling.Problem I'm facing is that at random moments in signal I receive errors that "Resource temporarily unavailable" while reading from ttyOx device and I see that sometimes I miss incoming data.Also is it possible that if while I'm handling signal one more signal arrives and it is started to be handled parallel? If it is, what are the ways to prevent it? So I would be sure that no more signals will fire on same peripheral until I will finish handling what I have on my hands now.
Serial open and init:
Code: Select allint open_port(int port_nr) {
int fd; /* File descriptor for the port */
switch (port_nr) {
case 1:
fd = open("/dev/ttyO1", O_RDWR | O_NOCTTY | O_NDELAY);
break;
[code]....
I have written a Linux kernel module (in Linux 2.4, Red Hat 9) which does the followings: It takes srcIP, sourceport, destIP, destport and loadvalue as command line arguments. If configured load value is greater than 1, it creates different channels (i.e. No of UDP channels created equals to configured load value), assign different source port and destination port to different channels and send UDP datagram in different channels. Say for example the configured parameters are as follows srcIP=10.17.17.43 destIP= 10.17.17.44 sourceport=10000 destport= 20000 loadvalue=2.
Then it creates two UDP different channels and transmits UDP packets (in every 20 milliseconds) to destination IP address (i.e., 10.17.17.44) with source port 10000, destination port 20000 in one channel and source port 10002, destination port 20000 in another channel. When I configure to pass ?loadvalue=500? and run the module, I get the below kernel panic message in system log file (i.e., var/log/messages) 0>Kernel panic: Aiee, killing interrupt handler! In interrupt handler - not syncing. Running the same linux kernel module ,in 1000 loadvalue, I get this message, eth0: Out-of-sync dirty pointer, 49937 vs. 49954 in text console. I am unable to catch the root cause of these problems and how will I solve these?
I would really like to install 2 or 3 PHP handler modules (suEXEC, FastCGI, etc) on a single server and assign which module should be used per virtual host or domain or whatever.
Is this possible?!
Could I get details?
I don't have wine installed. But I use teamviewer [URL] to remote support my friends. Teamviewer provide an "linux version" using wine wrapper. Every time I run it, some mime types such as .jpg, .wmv, .txt, .ini, v.v... was set to be handle by a "A Wine application". So, nothing happen when I open those file, I have to reset their handler to proper linux application.
1. How can I completely remove those "A wine application" handler? Is there a tool, or a settings applet in gnome that allow me to do that. Currently, I have to find those files in nautilus, right click and change the open with settings, that's frustrated.
2. Can I lock mime type handling settings from being changed by some application? Or even lock it from any changed at all? I don't mind remove the write permission from some settings file, I won't likely to change my current mime type handling settings in near future.
Is it possible to handle multiple signals in just one handler? I only know singal() catches one signal at a time
View 2 Replies View Relatedlocking mutex (phtread_t type) in a signal handler function (installed by function signal()) for Linux. It seems that if the mutex has been previously locked by another thread outside the signal handler function and then the signal handler function tries to lock it, the whole process hangs.
View 5 Replies View RelatedI'm new to Unix and every signal handler algorithm I've seen is more or less a copy of what I'm trying to do.[URL] designing a signal handler with sigwait in UNIX?
View 1 Replies View RelatedI'm trying to create a signal handler thread to handle SIGALRM signals. The main thread calls the following function before creating any other threads
Code:
pthread_t Timer::Init(long _clock_interval_musec)
{
// Set interval.
clock_interval = _clock_interval_musec;
// This is called while in a single threaded environment.
[code]....
clock_interval is 50.
Is the timer not firing? Did I not set my interval correctly? Did I not proper block the signals ensuring the that the default handler would not take care of them?
I am looking for a program that will allow me to type a command to quickly define a word. Something like this: Code: dic piquant
1. Having a pleasantly sharp taste or appetizing flavor.
2. Pleasantly stimulating or exciting to the mind
i was installed two ubuntu(1,2) via wmware on my laptop(win=7) on one of them run dhcpserver (ubuntu-1) and i am going to run the other one dhcp client(ubuntu-2) but on the one NIC that belong to my laptop how to config dhcp client (ununtu-2) get ip adres fom dhcserver(ubuntu 1)
View 3 Replies View RelatedI'm trying to change to a subdirectory:
Code:
tony@advent:~/scratch$ cd Home-Arch
bash: cd: Home-Arch: No such file or directory
So I list the contents of the current directory:
Code:
tony@advent:~/scratch$ ls
duhome Home-Arch qcad_1.dxf qcad_1.svg runme stdout
OK, I assume I have mis-typed the subdirectory name in ways I cannot detect, so I copy the sub-directory name from the output of the 'ls' command, while within the terminal window, and paste it into the next 'cd' command:
Code:
tony@advent:~/scratch$ cd Home-Arch
bash: cd: Home-Arch: No such file or directory
I browse the directory and sub-directory in Nautlius - everything is there where I expect it to be. The folders/files are not hidden. What is happening here?
This is my problem
bash: /usr/local/uvlayout-pro/bin/headus: No such file or directory
but the file exists. If I uncheck the Allow execute as a program the error is
bash: /usr/local/uvlayout-pro/bin/headus: permission denied
I used the sudo command.
(I tried to change the folder permissions to read and write, cause if I didn't, then the file, when not in nautilus, had an x in the top right of the icon. Before this it didn't work anyway)
How can I define some users as ssh user( ssh to linux remotely ) and the others not ( do not ssh)?
View 4 Replies View Related
