03-22-2011
Quote:
Originally Posted by
disaster
To be honest, I do not really understand your question.
What exactly is the problem?
Just a quick thing about your code changes: They would not change anything except for the puts().
read() returns either -1 on error or the number of bytes read. The -1 case will call err_sys which will exit the whole program. So Read() will always return something >= 0
Hi, I hope the TCP server never stop or exit anytime. In the original one, the TCP server exits once any read error occur, it is horrible since clients may hung up during the transmission and it is nondeterministic.
So I change a little bit about the codes and deduct exit() functions. However, I am not sure whether these changes affect select() method or not. So it is the question I want to ask.
Thanks.
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LEARN ABOUT OPENSOLARIS
exit
exit(1T) Tcl Built-In Commands exit(1T)
__________________________________________________________________________________________________________________________________________________
NAME
exit - End the application
SYNOPSIS
exit ?returnCode?
_________________________________________________________________
DESCRIPTION
Terminate the process, returning returnCode to the system as the exit status. If returnCode isn't specified then it defaults to 0.
EXAMPLE
Since non-zero exit codes are usually interpreted as error cases by the calling process, the exit command is an important part of sig-
nalling that something fatal has gone wrong. This code fragment is useful in scripts to act as a general problem trap:
proc main {} {
# ... put the real main code in here ...
}
if {[catch {main} msg]} {
puts stderr "unexpected script error: $msg"
if {[info exist env(DEBUG)]} {
puts stderr "---- BEGIN TRACE ----"
puts stderr $errorInfo
puts stderr "---- END TRACE ----"
}
# Reserve code 1 for "expected" error exits...
exit 2
}
SEE ALSO
exec(1T), tclvars(1T)
KEYWORDS
exit, process
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Availability | SUNWTcl |
+--------------------+-----------------+
|Interface Stability | Uncommitted |
+--------------------+-----------------+
NOTES
Source for Tcl is available on http://opensolaris.org.
Tcl exit(1T)