2023-06-12 11:49:42

by Wyes Karny

Subject: [PATCH 3/6] cpupower: Add is_sysfs_present API

Add is_sysfs_present API to check whether the sysfs file is present or not.

Suggested-by: Gautham R. Shenoy <[email protected]>
Signed-off-by: Wyes Karny <[email protected]>
---
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);
--
2.34.1

2023-06-12 13:34:32

by Wyes Karny

Subject: [PATCH v1.1 3/6] cpupower: Add is_valid_path API

Add is_valid_path API to check whether the sysfs file is present or not.

Suggested-by: Gautham R. Shenoy <[email protected]>
Signed-off-by: Wyes Karny <[email protected]>
---
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);
--
2.34.1