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FreeBSD 11.0 - man page for dtruss (freebsd section 1)

DTRUSS(1)						    BSD General Commands Manual 						 DTRUSS(1)

NAME
dtruss -- Trace system calls and userland stacks using DTrace
SYNOPSIS
dtruss [-acdefholLs] [-t syscall] [-n name -p pid command]
DESCRIPTION
The dtruss utility traces system calls and (optionally) userland stack traces for the specified programs. The following options are available: -p pid Trace the process with PID pid. -n name Trace the process with name name. -t syscall Trace the specified syscall only. -a Print all details. -c Print syscall counts. -d Print relative times (in microseconds). -e Print elapsed times (in microseconds). -f Follow the children processes. -l Force printing PID / TID. -o Print time spent on CPU. -s Print userland stack backtraces. -L Don't print PID / TID. -b bufsize Specify the DTrace buffer size.
EXIT STATUS
The dtruss utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
dtrace(1)
HISTORY
The dtruss utility comes from the DTraceToolkit and was first imported into FreeBSD 9.0.
AUTHORS
Brendan Gregg
BSD
August 26, 2010 BSD

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