From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753817AbaE1A02 (ORCPT ); Tue, 27 May 2014 20:26:28 -0400 Received: from mail-yk0-f173.google.com ([209.85.160.173]:39151 "EHLO mail-yk0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752430AbaE1A0Y (ORCPT ); Tue, 27 May 2014 20:26:24 -0400 From: Cody P Schafer To: LKML , Linux PPC , Arnaldo Carvalho de Melo , Borislav Petkov , Cody P Schafer , Jiri Olsa Cc: Sukadev Bhattiprolu Subject: [PATCH 01/16] tools/perf: allow overriding sysfs and proc finding with env var Date: Tue, 27 May 2014 17:21:56 -0700 Message-Id: <1401236684-10579-2-git-send-email-dev@codyps.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1401236684-10579-1-git-send-email-dev@codyps.com> References: <1401236684-10579-1-git-send-email-dev@codyps.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org SYSFS_PATH and PROC_PATH environment variables now let the user override the detection of sysfs and proc locations for testing purposes. CC: Sukadev Bhattiprolu Signed-off-by: Cody P Schafer --- tools/lib/api/fs/fs.c | 43 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 42 insertions(+), 1 deletion(-) diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c index 5b5eb78..c1b49c3 100644 --- a/tools/lib/api/fs/fs.c +++ b/tools/lib/api/fs/fs.c @@ -1,8 +1,10 @@ /* TODO merge/factor in debugfs.c here */ +#include #include #include #include +#include #include #include @@ -96,12 +98,51 @@ static bool fs__check_mounts(struct fs *fs) return false; } +static void mem_toupper(char *f, size_t len) +{ + while (len) { + *f = toupper(*f); + f++; + len--; + } +} + +/* + * Check for "NAME_PATH" environment variable to override fs location (for + * testing). This matches the recommendation in Documentation/sysfs-rules.txt + * for SYSFS_PATH. + */ +static bool fs__env_override(struct fs *fs) +{ + char *override_path; + size_t name_len = strlen(fs->name); + /* name + "_PATH" + '\0' */ + char upper_name[name_len + 5 + 1]; + memcpy(upper_name, fs->name, name_len); + mem_toupper(upper_name, name_len); + strcpy(&upper_name[name_len], "_PATH"); + + override_path = getenv(upper_name); + if (!override_path) + return false; + + fs->found = true; + strncpy(fs->path, override_path, sizeof(fs->path)); + return true; +} + static const char *fs__get_mountpoint(struct fs *fs) { + if (fs__env_override(fs)) + return fs->path; + if (fs__check_mounts(fs)) return fs->path; - return fs__read_mounts(fs) ? fs->path : NULL; + if (fs__read_mounts(fs)) + return fs->path; + + return NULL; } static const char *fs__mountpoint(int idx) -- 1.9.3