This does work too, indeed, though I don't fully understand the script: Why do we need the count parameter here. I see that we do need it, because when I set it to a higher value or omit it, the script hangs (probably waiting for input). But how does this parameter make it work?
I understand that with count=1, you tell dd to return one block only, where the default block size is 512 bytes. I can understand, how this works, when reading from a file, but how does dd know that it has finished reading? There is, I think, no EOF when reading from /dev/tty, and if there were an EOF condition, the count parameter would not be needed at all.
I am trying to write a korn shell script which posts commands to a server and read the response back from the server.
Any idea how I can read the servers response?
I have tried doing the following:
(
LOGIN:xxxxx
command to server
read ANSWER
echo $ANSWER >file1... (4 Replies)
Hi ALL:
I am not able to get the response back from weblogic in the shell script.
The weblogic server in different account. I am able to login to that account and bring the server up but while doing a ping, the script is failing. While the same script is running fine if I run it on the account... (1 Reply)
I have a shell script that is building a string that consists of the parts of a command that I want run at the end of the string. So it looks like this:
$PART1=/path/to/command
$PART2="-arg1"
$PART3="-arg2"
and so on.
At the end of the command is a list of files I get from a loop and... (2 Replies)
My company has a private network, including a Apache web server (Linux) and some WinXP machines. The web server had been configured to use mod_proxy to connect to window update site via another company proxy server. It works for few years.
Recently, some parties had setup a DNS server on the... (2 Replies)
Hi - I am getting the error
`Error reading response length from authentication socket'
when I ssh from my cluster to another cluster, and then back to my cluster. It doesn't seem to affect anything, but it's just annoying that it always pops up and tends to confuse new users of the cluster. I... (1 Reply)
How can I get a bash script to wait and read and count $i messages that a running program (drbl clonezilla) sends to the console (terminal) and only then move on to the next line in the script when the count is matched (the next line is the last line of the script and is a reboot)?
The script... (0 Replies)
Is there hopefully a way to search for an exact string in Man Pages? I know if I want to search for anything containing -c I can just do this.
/-c
How would I search for "-c"? I want only "-c" to show up. So I tried this.
/"-c"
It took me literally and looked for the quotes also. (13 Replies)
Solaris terminal responding very slow .. we have recently put a T3 hardware in to production , the applications running are it are perfectly and no complaints from user ..but when i ssh to the server ... the terminal response is very very slow .. it takes 3 seconds to show the character i type ..... (3 Replies)
Hi All,
I have a requirement to read response file which looks like below
Ex:
NAME=SAM
DOB=01/01/1980
ADDRESS=
7658 James Street
NewYork
0000
Now, I need to take NAME, DOB, ADDRESS into variables
I am fine taking NAME and DOB
I need help on how can I... (6 Replies)
I don't know if you guys get this problem sometimes at Terminal but I had been having this problem since yesterday :( Maybe I overdid the Terminal. Even the codes that used to work doesn't work anymore.
Here is what 's happening:
* I wanted to remove lines containing digits so I used this... (25 Replies)
Discussion started by: Nexeu
25 Replies
LEARN ABOUT OPENDARWIN
mount_fdesc
MOUNT_FDESC(8) BSD System Manager's Manual MOUNT_FDESC(8)NAME
mount_fdesc -- mount the file-descriptor file system
SYNOPSIS
mount_fdesc [-o options] fdesc mount_point
DESCRIPTION
The mount_fdesc command attaches an instance of the per-process file descriptor namespace to the global filesystem namespace. The conven-
tional mount point is /dev and the filesystem should be union mounted in order to augment, rather than replace, the existing entries in /dev.
This command is normally executed by mount(8) at boot time.
The options are as follows:
-o Options are specified with a -o flag followed by a comma separated string of options. See the mount(8) man page for possible options
and their meanings.
The contents of the mount point are fd, stderr, stdin, stdout and tty.
fd is a directory whose contents appear as a list of numbered files which correspond to the open files of the process reading the directory.
The files /dev/fd/0 through /dev/fd/# refer to file descriptors which can be accessed through the file system. If the file descriptor is
open and the mode the file is being opened with is a subset of the mode of the existing descriptor, the call:
fd = open("/dev/fd/0", mode);
and the call:
fd = fcntl(0, F_DUPFD, 0);
are equivalent.
The files /dev/stdin, /dev/stdout and /dev/stderr appear as symlinks to the relevant entry in the /dev/fd sub-directory. Opening them is
equivalent to the following calls:
fd = fcntl(STDIN_FILENO, F_DUPFD, 0);
fd = fcntl(STDOUT_FILENO, F_DUPFD, 0);
fd = fcntl(STDERR_FILENO, F_DUPFD, 0);
Flags to the open(2) call other than O_RDONLY, O_WRONLY and O_RDWR are ignored.
The /dev/tty entry is an indirect reference to the current process's controlling terminal. It appears as a named pipe (FIFO) but behaves in
exactly the same way as the real controlling terminal device.
FILES
/dev/fd/#
/dev/stdin
/dev/stdout
/dev/stderr
/dev/tty
SEE ALSO mount(2), unmount(2), tty(4), fstab(5), mount(8)CAVEATS
No ~. and .. entries appear when listing the contents of the /dev/fd directory. This makes sense in the context of this filesystem, but is
inconsistent with usual filesystem conventions. However, it is still possible to refer to both ~. and .. in a pathname.
This filesystem may not be NFS-exported.
HISTORY
The mount_fdesc utility first appeared in 4.4BSD.
4.4BSD March 27, 1994 4.4BSD