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    SubjectRe: [PATCH v3 7/9] perf header: Add check_perf_magic() func
    Em Mon, Sep 24, 2012 at 11:24:09PM +0800, Feng Tang escreveu:
    > With this func, other modules can basically check whether a file
    > is a legal perf data file by checking its first 8 bytes aginst
    > all possible perf magic nunbers.

    Please consider submitting a patch to http://www.darwinsys.com/file/ :-)

    - Arnaldo

    > Signed-off-by: Feng Tang <feng.tang@intel.com>
    > ---
    > tools/perf/util/header.c | 11 +++++++++++
    > tools/perf/util/header.h | 1 +
    > 2 files changed, 12 insertions(+), 0 deletions(-)
    >
    > diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
    > index ad72b28..555cb68 100644
    > --- a/tools/perf/util/header.c
    > +++ b/tools/perf/util/header.c
    > @@ -2174,6 +2174,17 @@ static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
    > return -1;
    > }
    >
    > +/* Return 0 if matched */
    > +int check_perf_magic(u64 magic)
    > +{
    > + if (!memcmp(&magic, __perf_magic1, sizeof(magic))
    > + || magic == __perf_magic2
    > + || magic == __perf_magic2_sw)
    > + return 0;
    > +
    > + return -1;
    > +}
    > +
    > static int check_magic_endian(u64 magic, uint64_t hdr_sz,
    > bool is_pipe, struct perf_header *ph)
    > {
    > diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
    > index 58de08b..af1a51c 100644
    > --- a/tools/perf/util/header.h
    > +++ b/tools/perf/util/header.h
    > @@ -131,6 +131,7 @@ int perf_event__synthesize_build_id(struct perf_tool *tool,
    > int perf_event__process_build_id(struct perf_tool *tool,
    > union perf_event *event,
    > struct perf_session *session);
    > +int check_perf_magic(u64 magic);
    >
    > /*
    > * arch specific callback
    > --
    > 1.7.1


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