Re: Recent changes

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Hello.
How about these ones:

http://marc.info/?l=linux-btrace&m=128049870115477&w=2
http://marc.info/?l=linux-btrace&m=128049870215491&w=2
http://marc.info/?l=linux-btrace&m=128049871415498&w=2
http://marc.info/?l=linux-btrace&m=128049873015527&w=2
http://marc.info/?l=linux-btrace&m=128049874115543&w=2
http://marc.info/?l=linux-btrace&m=128049875115566&w=2

any chances they will be pushed? All of them except the second
one (blkiomon fixups) are ack-ed by Alan D. Brunelle.

Thanks,
Edward.

Jens Axboe wrote:
The following changes since commit fb7f86674a516ddff0d60bfab3bd284a4812075f:

  blktrace: disable kill option - take 2 (2010-04-20 15:41:14 +0200)

are available in the git repository at:
  git://git.kernel.dk/blktrace.git master

Alan D. Brunelle (1):
      blktrace: disallow -o when using multiple devices

 blktrace.c       |    6 ++++++
 doc/blktrace.8   |    3 +++
 doc/blktrace.tex |    5 ++++-
 3 files changed, 13 insertions(+), 1 deletions(-)

---

Diff of recent changes:

diff --git a/blktrace.c b/blktrace.c
index b9f9b68..4671a04 100644
--- a/blktrace.c
+++ b/blktrace.c
@@ -2626,6 +2626,12 @@ int main(int argc, char *argv[])
 		goto out;
 	}
+ if (ndevs > 1 && output_name && strcmp(output_name, "-") != 0) {
+		fprintf(stderr, "-o not supported with multiple devices\n");
+		ret = 1;
+		goto out;
+	}
+
 	signal(SIGINT, handle_sigint);
 	signal(SIGHUP, handle_sigint);
 	signal(SIGTERM, handle_sigint);
diff --git a/doc/blktrace.8 b/doc/blktrace.8
index ab6a3f3..50b3a62 100644
--- a/doc/blktrace.8
+++ b/doc/blktrace.8
@@ -122,6 +122,9 @@ Specifies number of buffers to use. blktrace defaults to 4 sub buffers.
\-\-output=\fIfile\fR .RS Prepend \fIfile\fR to output file name(s) +
+This only works when supplying a single device, or when piping the output
+via "-o -" with multiple devices.
 .RE
\-r \fIrel-path\fR
diff --git a/doc/blktrace.tex b/doc/blktrace.tex
index 54fe451..4d8278e 100644
--- a/doc/blktrace.tex
+++ b/doc/blktrace.tex
@@ -389,7 +389,10 @@ Short              & Long                       & Description \\ \hline\hline
 -d \emph{dev}      & --dev=\emph{dev}           & Adds \emph{dev} as a device to trace \\ \hline
 -k                 & --kill                     & Kill on-going trace \\ \hline
 -n \emph{num-sub}  & --num-sub=\emph{num-sub}   & Specifies number of buffers to use \\ \hline
--o \emph{file}     & --output=\emph{file}       & Prepend \emph{file} to output file name(s) \\ \hline
+-o \emph{file}     & --output=\emph{file}       & Prepend \emph{file} to output file name(s) \\
+                   &                            & \textbf{This only works when using a single device} \\
+                   &                            & \textbf{or when piping the output via \texttt{-o -}} \\
+                   &                            & \textbf{with multiple devices.} \\ \hline
 -r \emph{rel-path} & --relay=\emph{rel-path}    & Specifies debugfs mount point \\ \hline
 -V                 & --version                  & Outputs version \\ \hline
 -w \emph{seconds}  & --stopwatch=\emph{seconds} & Sets run time to the number of seconds specified \\ \hline
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--
Edward O. Shishkin
Principal Software Engineer
Red Hat Czech

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