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SFS:(13230028)(4636009)(346002)(376002)(39860400002)(136003)(396003)(451199021)(46966006)(36840700001)(40470700004)(4326008)(44832011)(316002)(70586007)(41300700001)(70206006)(186003)(16526019)(110136005)(2906002)(54906003)(478600001)(8676002)(8936002)(5660300002)(6666004)(40460700003)(7696005)(1076003)(82740400003)(81166007)(40480700001)(36860700001)(356005)(26005)(83380400001)(426003)(336012)(47076005)(36756003)(82310400005)(86362001)(2616005)(36900700001)(2101003); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Jun 2023 13:17:58.4975 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 69c56cd6-475e-4b99-c240-08db6b477102 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EE3D.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB7716 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add is_valid_path API to check whether the sysfs file is present or not. Suggested-by: Gautham R. Shenoy Signed-off-by: Wyes Karny --- v1 -> v1.1 - s/is_sysfs_present/is_valid_path tools/power/cpupower/lib/cpupower.c | 7 +++++++ tools/power/cpupower/lib/cpupower_intern.h | 1 + 2 files changed, 8 insertions(+) diff --git a/tools/power/cpupower/lib/cpupower.c b/tools/power/cpupower/lib/cpupower.c index 3f7d0c0c5067..7a2ef691b20e 100644 --- a/tools/power/cpupower/lib/cpupower.c +++ b/tools/power/cpupower/lib/cpupower.c @@ -14,6 +14,13 @@ #include "cpupower.h" #include "cpupower_intern.h" +int is_valid_path(const char *path) +{ + if (access(path, F_OK) == -1) + return 0; + return 1; +} + unsigned int cpupower_read_sysfs(const char *path, char *buf, size_t buflen) { ssize_t numread; diff --git a/tools/power/cpupower/lib/cpupower_intern.h b/tools/power/cpupower/lib/cpupower_intern.h index ac1112b956ec..5fdb8620d41b 100644 --- a/tools/power/cpupower/lib/cpupower_intern.h +++ b/tools/power/cpupower/lib/cpupower_intern.h @@ -7,5 +7,6 @@ #define SYSFS_PATH_MAX 255 +int is_valid_path(const char *path); unsigned int cpupower_read_sysfs(const char *path, char *buf, size_t buflen); unsigned int cpupower_write_sysfs(const char *path, char *buf, size_t buflen);