From 07bc5c699a3d8fe5e26dbcd72e4103c7988055ba Mon Sep 17 00:00:00 2001 From: Wang Nan Date: Fri, 6 Nov 2015 13:55:35 +0000 Subject: perf tools: Make fetch_kernel_version() publicly available There are 2 places in llvm-utils.c which find kernel version information through uname. This patch extracts the uname related code into a fetch_kernel_version() function and puts it into util.h so it can be reused. Signed-off-by: Wang Nan Cc: Jiri Olsa Cc: Namhyung Kim Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1446818135-87310-1-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/util.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) (limited to 'tools/perf/util/util.c') diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c index cd12c25e4ea4..47b1e36c7ea0 100644 --- a/tools/perf/util/util.c +++ b/tools/perf/util/util.c @@ -3,6 +3,7 @@ #include "debug.h" #include #include +#include #ifdef HAVE_BACKTRACE_SUPPORT #include #endif @@ -665,3 +666,32 @@ bool find_process(const char *name) closedir(dir); return ret ? false : true; } + +int +fetch_kernel_version(unsigned int *puint, char *str, + size_t str_size) +{ + struct utsname utsname; + int version, patchlevel, sublevel, err; + + if (uname(&utsname)) + return -1; + + if (str && str_size) { + strncpy(str, utsname.release, str_size); + str[str_size - 1] = '\0'; + } + + err = sscanf(utsname.release, "%d.%d.%d", + &version, &patchlevel, &sublevel); + + if (err != 3) { + pr_debug("Unablt to get kernel version from uname '%s'\n", + utsname.release); + return -1; + } + + if (puint) + *puint = (version << 16) + (patchlevel << 8) + sublevel; + return 0; +} -- cgit v1.2.3-59-g8ed1b