One (hacky) method to force each iteration of the loop to wait until usearch and all of its children have exited is to use strace -f.
A simple demonstration ...
sneaky.sh: prints 1 and exits while a sleeping subshell is left behind to print 2 at a later time.
loop.sh: runs sneaky.sh, almost certainly completing all loop iterations before any of the sleeping subshells awake.
Sample run:
loop-strace.sh: exploits the fact that strace -f does not return until all children have exited:
Sample run:
If you are interested in seeing the processes that usearch is creating and how it's managing them, use a real file instead of /dev/null.
In a korn shell script, how can I run several processes in parallel at the same time?
For example, I have 3 processes say p1, p2, p3
if I call them as
p1.ksh
p2.ksh
p3.ksh
they will run after one process finishes. But I want to run them in parallel and want to display "Process p1... (3 Replies)
Hi,
My server runnning on SUN Solaris rel.5.5.1. I have been facing this issues for years. I have some Xbase databases running on the server. User is using emulation software to telnet to server for accessing application. If user logout application abnormally - by closing windows session, then... (2 Replies)
Hi,
Would like to ask the experts if anyone knows how to run a script like this:
dtterm -title shell1
run process1 on shell1
dtterm -title shell2
run process2 on shell2
cheers!
p/s: sorry if i used the wrong forum, quite concussed after watching world cup for several nights; but I... (2 Replies)
I have the root password for my box, but I'm ignorant.
So, every time I start my computer, I have to run this command
/sbin/modprobe fuse
as su, so that I can do other stuff (like mount remote directories locally using sshfs)
I guess there's some file, like .bashrc, only it's applicable... (4 Replies)
This is my first post here so hello everyone! I know that a command of the programs name can start a program and clicking on a icon in GUI can as well as a startup shell script but how do I educate myself of the method that starts an application? Does the GUI run a script? What are the ways/ way... (2 Replies)
I would like to call a function called CIRCLE which is further beind called by other function but in a loop that CIRCLE fuction is being called. And this CIRCLE function starts another process which takes 3 hours to complete again, if i put that process in nohup &, I can go to the next command... (2 Replies)
Is there any limit in UNIX that only a MAXIMUM no of processes can run at a time? If so, it exceeds then what would be the error we would receive? (4 Replies)
Hello All,
Maybe I'm Missing something here but I have NOOO idea what the heck is going on with this....?
I have a Variable that contains a PATTERN of what I'm considering "Illegal Characters". So what I'm doing is looping
through a string containing some of these "Illegal Characters". Now... (5 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data: It's a shell script using a looping logic, trap, tput, if, while. Most of the scripts in this book aren't written... (2 Replies)
This is on a CentOS box, I have two scripts that need to run in order.
I want to write a shell script that calls the first script, lets it run and then terminates it after a certain number of hours (that I specify of course), and then calls the second script (they can't run simultaneously) which... (3 Replies)
Discussion started by: btramer
3 Replies
LEARN ABOUT OPENSOLARIS
strace
strace(1M) System Administration Commands strace(1M)NAME
strace - print STREAMS trace messages
SYNOPSIS
strace [mid sid level]...
DESCRIPTION
strace without arguments writes all STREAMS event trace messages from all drivers and modules to its standard output. These messages are
obtained from the STREAMS log driver (see log(7D)). If arguments are provided, they must be in triplets of the form mid, sid, level, where
mid is a STREAMS module ID number, sid is a sub-ID number, and level is a tracing priority level. Each triplet indicates that tracing
messages are to be received from the given module/driver, sub-ID (usually indicating minor device), and priority level equal to, or less
than the given level. The token all may be used for any member to indicate no restriction for that attribute.
The format of each trace message output is:
<seq> <time> <ticks> <level> <flags> <mid> <sid> <text>
<seq> trace sequence number
<time> time of message in hh:mm:ss
<ticks> time of message in machine ticks since boot
<level> tracing priority level
<flags> E : message is also in the error log F : indicates a fatal error N : mail was sent to the system administrator (hardcoded as
root)
<mid> module ID number of source
<sid> sub-ID number of source
<text> formatted text of the trace message
Once initiated, strace will continue to execute until terminated by the user.
EXAMPLES
Example 1 A sample output of the strace command:
The following example outputs all trace messages from the module or driver whose module ID is 41:
strace 41 all all
The following example outputs those trace messages from driver or module ID 41 with sub-IDs 0, 1, or 2:
strace 41 0 1 41 1 1 41 2 0
Messages from sub-IDs 0 and 1 must have a tracing level less than or equal to 1. Those from sub-ID 2 must have a tracing level of 0.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO attributes(5), log(7D)NOTES
o There is no restriction to the number of strace processes opening the STREAMS log driver at a time.
o The log-driver records the list of the triplets specified in the command invocation, and compares each potential trace message
against this list to decide if it should be formatted and sent up to the strace process. Hence, long lists of triplets will have
a greater impact on overall STREAMS performance. Running strace will have the most impact on the timing of the modules and
drivers generating the trace messages that are sent to the strace process. If trace messages are generated faster than the
strace process can handle them, some of the messages will be lost. This last case can be determined by examining the sequence
numbers on the trace messages output.
SunOS 5.11 4 Oct 1994 strace(1M)