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perf tools: Handle -h and -v options 

Adding handling for '-h' and '-v' options to invoke help and version
command respectively.

Current behaviour is:

   $ perf -v
   Unknown option: -v

    Usage: perf [--version] [--help] [OPTIONS] COMMAND [ARGS]
   $ perf -h
   Unknown option: -h

    Usage: perf [--version] [--help] [OPTIONS] COMMAND [ARGS]

New behaviour:

  $ perf -h

   usage: perf [--version] [--help] [OPTIONS] COMMAND [ARGS]

   The most commonly used perf commands are:
     annotate        Read perf.data (created by perf record) and display annotated code
     archive         Create archive with object files with build-ids found in perf.data file
     bench           General framework for benchmark suites
   ...

  $ perf -v
  perf version 4.3.rc3.gc99e32

Updated man page.

Requested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1444068369-20978-10-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2015-10-05 20:06:09 +02:00 committed by Arnaldo Carvalho de Melo
parent b34b3bf079
commit a1853e2c6f
2 changed files with 22 additions and 0 deletions
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8
tools/perf/Documentation/perf.txt
View File

@ -27,6 +27,14 @@ OPTIONS
Setup buildid cache directory. It has higher priority than
buildid.dir config file option.
-v::
--version::
Display perf version.
-h::
--help::
Run perf help command.
DESCRIPTION
-----------
Performance counters for Linux are a new kernel-based subsystem

14
tools/perf/perf.c
View File

@ -161,6 +161,20 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
break;
/*
* Shortcut for '-h' and '-v' options to invoke help
* and version command.
*/
if (!strcmp(cmd, "-h")) {
(*argv)[0] = "--help";
break;
}
if (!strcmp(cmd, "-v")) {
(*argv)[0] = "--version";
break;
}
/*
* Check remaining flags.
*/