Kindly suggest how can I restrict kernel and other utilities that generate logs entries through klogd and syslog to a specific (fixed) virtual terminal.
Since /dev/tty1 will be hosting my application, I can open up /dev/tty2 to have all system wide log entries there. So is there any thing in kernel arguments, and/or in configuration that I can change/make to restrict all kernel output to a specific console.
Also I post this in programming forum, because in my application, I explicitly made the STDOUT(/dev/tty1) exclusive to my application, and redirect all the output to the /dev/tty2. Here is the code ...
So what I get in result is that when I redirected an output to /dev/tty1 through echo as
the output did redirected to the /dev/tty2 as I made it explicit in my code. But when partition tables are re-synced from fdisk utility, the kernel outputs on the /dev/tty1 (as it was active then).
Hence the above code to make /dev/tty1 exclusive to my process, and redirect all output to /dev/tty2 fails partially.
hi floks !
i'd like to know how can i transmete a character or a string from my source code to a term and make it interpret or un by the shell wich is running in my term.
I'd like to create a Term from my code (and get its file descriptor) and then transmete each char typed on the keyboard to... (1 Reply)
Hi all,
I'm running AIX 4.3.3.
Is there a way in C++ to get a list of all current processes running on the processor? I have a manager daemon tracking all the software applications. They're using a system of healthchecks to update status. One intermittently is missing its healthcheck,... (1 Reply)
Hi,
I have 2 start and stop sh.
Start sh
--------
This will start few processes.
Example code:
echo "start process : lgz200 /pipe=test_jobs"
nohup lgz200 /db=test/test1@test1 /pipe=test_jobs > ../log/lgz200_j.log &
echo "echo \"stop process (pid=$!): lgz200 /pipe=test_jobs\"" >>... (3 Replies)
Hi All,
I have an input_file below and i would like to use Perl to search for the term "aaa" and output the 3rd term in the same row as "aaa".For Example, i want to search for the term "ddd" and would want the code to ouput the 3rd term in the same row which is "fff". Can somebody help ?
... (28 Replies)
Hello,
I just want to ask the following use of find command:
1. how can I find files only to the current directory?
2. how can I find files to directories and all subdiretories (are this include soft links?) but will not go to other mountpoints that is under that mountpoint.
Im combining... (1 Reply)
Hi all,
I joined this forum today and this is my first question. I thank you all for viewing it. I will try to be brief.
The OS: HP-UX B.11.11 U 9000/800
There are lot of cron scheduled perl scripts running on this server, which do different things at different time. Some of them process... (10 Replies)
Please anyone tell me
In my last interview the HR asks me how to monitor, start,stop & kill the various processes and subprocesses.
Please anyone explain me clearly. It's my personal request (3 Replies)
Hi there,
I've install a testserver with SLES 11.0! I'll install/test XEN + WebServer not all things at the moment!
In a first time, I'd like to stop all unuse processes... but I don't understand all processes!
As someone a list of all processes with his signification and which should/could... (3 Replies)
Hi,
Could someone tell me how to stop SQLPLUS command from printing the connection details in the console.
Below is the lines i get in console when executing the sqlplus...
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Mar 9 03:31:03 2011
Copyright (c) 1982, 2005, Oracle. All rights... (2 Replies)
Discussion started by: funonnet
2 Replies
LEARN ABOUT CENTOS
vcsa
VCS(4) Linux Programmer's Manual VCS(4)NAME
vcs, vcsa - virtual console memory
DESCRIPTION
/dev/vcs0 is a character device with major number 7 and minor number 0, usually of mode 0644 and owner root.tty. It refers to the memory
of the currently displayed virtual console terminal.
/dev/vcs[1-63] are character devices for virtual console terminals, they have major number 7 and minor number 1 to 63, usually mode 0644
and owner root.tty. /dev/vcsa[0-63] are the same, but using unsigned shorts (in host byte order) that include attributes, and prefixed
with four bytes giving the screen dimensions and cursor position: lines, columns, x, y. (x = y = 0 at the top left corner of the screen.)
When a 512-character font is loaded, the 9th bit position can be fetched by applying the ioctl(2) VT_GETHIFONTMASK operation (available in
Linux kernels 2.6.18 and above) on /dev/tty[1-63]; the value is returned in the unsigned short pointed to by the third ioctl(2) argument.
These devices replace the screendump ioctl(2) operations of console(4), so the system administrator can control access using file system
permissions.
The devices for the first eight virtual consoles may be created by:
for x in 0 1 2 3 4 5 6 7 8; do
mknod -m 644 /dev/vcs$x c 7 $x;
mknod -m 644 /dev/vcsa$x c 7 $[$x+128];
done
chown root:tty /dev/vcs*
No ioctl(2) requests are supported.
FILES
/dev/vcs[0-63]
/dev/vcsa[0-63]
VERSIONS
Introduced with version 1.1.92 of the Linux kernel.
EXAMPLE
You may do a screendump on vt3 by switching to vt1 and typing
cat /dev/vcs3 >foo
Note that the output does not contain newline characters, so some processing may be required, like in
old -w 81 /dev/vcs3 | lpr
or (horrors)
xetterm -dump 3 -file /proc/self/fd/1
The /dev/vcsa0 device is used for Braille support.
This program displays the character and screen attributes under the cursor of the second virtual console, then changes the background color
there:
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/vt.h>
int
main(void)
{
int fd;
char *device = "/dev/vcsa2";
char *console = "/dev/tty2";
struct {unsigned char lines, cols, x, y;} scrn;
unsigned short s;
unsigned short mask;
unsigned char ch, attrib;
fd = open(console, O_RDWR);
if (fd < 0) {
perror(console);
exit(EXIT_FAILURE);
}
if (ioctl(fd, VT_GETHIFONTMASK, &mask) < 0) {
perror("VT_GETHIFONTMASK");
exit(EXIT_FAILURE);
}
(void) close(fd);
fd = open(device, O_RDWR);
if (fd < 0) {
perror(device);
exit(EXIT_FAILURE);
}
(void) read(fd, &scrn, 4);
(void) lseek(fd, 4 + 2*(scrn.y*scrn.cols + scrn.x), 0);
(void) read(fd, &s, 2);
ch = s & 0xff;
if (attrib & mask)
ch |= 0x100;
attrib = ((s & ~mask) >> 8);
printf("ch='%c' attrib=0x%02x
", ch, attrib);
attrib ^= 0x10;
(void) lseek(fd, -1, 1);
(void) write(fd, &attrib, 1);
exit(EXIT_SUCCESS);
}
SEE ALSO console(4), tty(4), ttyS(4), gpm(8)COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2007-12-17 VCS(4)