02-25-2019
Quote:
Originally Posted by
Xubuntu56
... which by default goes where 1 goes".
It does not. You need to differentiate between "by default" and "by habit" here. With your interactive sessions, you have both pointing to your terminal by habit. But running a command or script may change that immediately - they may have a different opinion of what their errors should go to. And even more so for system programs, e.g. daemons, which will off the shelf log to log files and print errors to their stderr. And this is what rbatte1 shows: a simple "error log" command for use inside (standalone?) scripts, assuming stdout and stderr have been split when / before calling / running,
Quote:
If so, I can't understand the point of >&2.
echo prints to stdout, so you need to redirect stdout to the stderr file descriptor for the "error log command".
EDIT: LOL - trying to prove my point, I thought I take
Xorgas an example, but it has both redirected to
/var/log/.../x-0.log Still, many dbus programs have fd 1 pointing to
/dev/null and fd 2 to
~/.xsession-errors
Last edited by RudiC; 02-25-2019 at 11:06 AM..
This User Gave Thanks to RudiC For This Post:
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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)