errinfo(1) USER COMMANDS errinfo(1)
NAME
errinfo - print errno for syscall fails. Uses DTrace.
SYNOPSIS
errinfo [-a|-A|-hsvZ] [-c command]
DESCRIPTION
errinfo snoops syscall failures and prints the errno value and descrip-
tion of the error number.
This program can help determine if applications are silently failing,
providing some details on the cause.
Since this uses DTrace, only users with root privileges can run this
command.
OPTIONS
-c counts - print an aggregate style report containing a frequency
count of errors
-p PID examine this PID only
-n name
examine processes with ths name only (eg, "ls")
EXAMPLES
Default output, print errors as they occur,
# errinfo
Print a frequency count report,
# errinfo -c
Snoop errors as they occur for "ssh" processes,
# errinfo -n ssh PP
Snoop errors for PID 81 only,
# errinfo -p 81
FIELDS
EXEC Program name (truncated)
SYSCALL
System call name
ERR Value of errno
DESC Description of errno message
DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs direc-
tory. The DTraceToolkit docs may include full worked examples with ver-
bose descriptions explaining the output.
EXIT
errinfo will run forever until Ctrl-C is hit.
FILES
/usr/include/sys/errno.h
Contains the full descriptions for the error numbers.
AUTHOR
Brendan Gregg [Sydney, Australia]
SEE ALSO
dtrace(1M), truss(1)
version 1.10 May 14, 2005 errinfo(1)
Mac OS X 10.6 - Generated Thu Sep 17 20:07:34 CDT 2009