In newer strace's, when both -c and -ff are invoked, strace returns the
following error: "strace: -c and -ff are mutually exclusive options".
This is also now documented in the strace(1) manpage with:
-ffIf the -o filename option is in effect, each processes trace
is writte
strace -ff -o food ls
does not emit timing info for me; it does give "umovestr: Input/output error"
(with strace-4.5.14-2ubuntu1)
** Changed in: strace (Ubuntu)
Importance: Undecided => Medium
Status: Unconfirmed => Confirmed
** Changed in: strace (Ubuntu)
Importance: Medium => Lo
** Bug watch added: SourceForge.net Tracker #1528124
http://sourceforge.net/support/tracker.php?aid=1528124
** Also affects: strace (upstream) via
http://sourceforge.net/support/tracker.php?aid=1528124
Importance: Unknown
Status: Unknown
--
'strace -ff -c -o filename' spits out n
This is also:
http://sourceforge.net/tracker/index.php?func=detail&aid=1528124&group_id=2861&atid=102861
--
'strace -ff -c -o filename' spits out null output
https://launchpad.net/bugs/53974
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