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-rw-r--r--tools/lib/api/fs/fs.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
index c1b49c36a951..65d9be3f9887 100644
--- a/tools/lib/api/fs/fs.c
+++ b/tools/lib/api/fs/fs.c
@@ -7,6 +7,10 @@
#include <stdlib.h>
#include <string.h>
#include <sys/vfs.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
#include "debugfs.h"
#include "fs.h"
@@ -163,3 +167,33 @@ const char *name##__mountpoint(void) \
FS__MOUNTPOINT(sysfs, FS__SYSFS);
FS__MOUNTPOINT(procfs, FS__PROCFS);
+
+int filename__read_int(const char *filename, int *value)
+{
+ char line[64];
+ int fd = open(filename, O_RDONLY), err = -1;
+
+ if (fd < 0)
+ return -1;
+
+ if (read(fd, line, sizeof(line)) > 0) {
+ *value = atoi(line);
+ err = 0;
+ }
+
+ close(fd);
+ return err;
+}
+
+int sysctl__read_int(const char *sysctl, int *value)
+{
+ char path[PATH_MAX];
+ const char *procfs = procfs__mountpoint();
+
+ if (!procfs)
+ return -1;
+
+ snprintf(path, sizeof(path), "%s/sys/%s", procfs, sysctl);
+
+ return filename__read_int(path, value);
+}