09-09-2009
Does your OS have the equivalent of truss on Solaris. When a program is run with truss system calls are output to STDERR. If you have something like that running tar with that and then redirecting the output to /dev/null and a regular file might show you why it ends so soon.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi ,
I am importing some table from /dev/null i dont understand what is /dev/null
Sorry i am new to UNIX
sam71 (3 Replies)
Discussion started by: sam71
3 Replies
2. Solaris
Please help urgently.
I need to setup up some sort of service on a solaris server on a port.
I dont need it do anything special, anything that is sent to this port from an external server should be dump to /dev/null or a flat file..
Can you help urgently? (1 Reply)
Discussion started by: frustrated1
1 Replies
3. Solaris
Hi, Anyone can help
My solaris 8 system has the following
/dev/null , /dev/tty and /dev/console
All permission are lrwxrwxrwx
Can this be change to a non-world write ??
any impact ?? (12 Replies)
Discussion started by: civic2005
12 Replies
4. Shell Programming and Scripting
when do you use the path /dev/null (3 Replies)
Discussion started by: webmunkey23
3 Replies
5. UNIX for Dummies Questions & Answers
Hello,
I am working on a script to measure the read performance of a busybox environment. The logical choice is to use a command line like:
(time cp * /dev/null) 2> /tmp/howlong.txt
Ah, the rub is cp or /dev/null will only accept a single file at a time.
The result in the txt file is and... (1 Reply)
Discussion started by: stevesmo
1 Replies
6. Shell Programming and Scripting
Hello,
I'm trying to send the error output of a 'cat' operation to /dev/null like this:
cat /dirA/dirB/temp*.log > /dirA/dirB/final.log 2>/dev/null
This works perfectly in a terminal, but not when placed in a script.
If there are no files matching temp*.log the script outputs an error... (7 Replies)
Discussion started by: Nils88
7 Replies
7. UNIX for Dummies Questions & Answers
How are these two different? They both prevent output and error from being displayed. I don't see the use of the "&"
echo "hello" > /dev/null 2>&1
echo "hello" > /dev/null 2>1 (3 Replies)
Discussion started by: glev2005
3 Replies
8. Shell Programming and Scripting
I apologize if this question has been answered else where or is too elementary.
I ran across a KSH script (long unimportant story) that does this:
if ; then
CAS_SRC_LOG="/var/log/cas_src.log 2>&1"
else
CAS_SRC_LOG="/dev/null 2>&1"
fithen does this:
/usr/bin/echo "heartbeat:... (5 Replies)
Discussion started by: jbmorrisonjr
5 Replies
9. Shell Programming and Scripting
I'm using an text-to-speech synthesis in a script, and I need to redirect it's output to /dev/null
how can I do that ? And how to redirect the stream to his normal output then (sound card ) ?
thankx (2 Replies)
Discussion started by: firelink
2 Replies
10. Shell Programming and Scripting
Friends have the following problem
a search may not find anything which would correct example:
ls -ltr *prueba.txt | nawk '{ print $9 }' > Procesar.dat 2>/dev/null
When he finds nothing gives me the following error
ls: prueba.txt: No such file or directory
because 2> / dev / null... (4 Replies)
Discussion started by: tricampeon81
4 Replies
LEARN ABOUT OSX
syscallbypid.d
syscallbypid.d(1m) USER COMMANDS syscallbypid.d(1m)
NAME
syscallbypid.d - syscalls by process ID. Uses DTrace.
SYNOPSIS
syscallbypid.d
DESCRIPTION
This reports the number of each type of system call made by PID. This is useful to identify which process is causing the most system
calls.
This is based on a script from DExplorer.
Since this uses DTrace, only users with root privileges can run this command.
EXAMPLES
This samples until Ctrl-C is hit.
# syscallbypid.d
FIELDS
PID process ID
CMD process name
SYSCALL
system call name
COUNT number of system calls made in this sample
DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver-
bose descriptions explaining the output.
EXIT
syscallbypid.d will sample until Ctrl-C is hit.
AUTHOR
Brendan Gregg [Sydney, Australia]
SEE ALSO
procsystime(1M), dtrace(1M), truss(1)
version 1.00 Jun 28, 2005 syscallbypid.d(1m)