errinfo(1m) USER COMMANDS errinfo(1m)

NAME
       errinfo - print errno for syscall fails. Uses DTrace.

SYNOPSIS
       eerrrriinnffoo [-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  the  root  user  or  users  with  the
       dtracekernel privilege can run this command.

OOPPTTIIOONNSS
       -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")

EEXXAAMMPPLLEESS
       Default output, print errors as they occur,
              # eerrrriinnffoo


       Print a frequency count report,
              # eerrrriinnffoo -c


       Snoop errors as they occur for "ssh" processes,
              # eerrrriinnffoo -n ssh PP

       Snoop errors for PID 81 only,
              # eerrrriinnffoo -p 81


FFIIEELLDDSS
       EXEC   Program name (truncated)

       SYSCALL
              System call name

       ERR    Value of errno

       DESC   Description of errno message


DDOOCCUUMMEENNTTAATTIIOONN
       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.

EEXXIITT
       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(1m)