From: Thomas Weißschuh <thomas@t-8ch.de>
Date: Wed, 21 Dec 2022 13:39:35 +0000 (+0000)
Subject: sysfs: add helper for /sys/kernel/address_bits
X-Git-Tag: v2.39-rc1~358^2~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=74c9e0d8c51af3b45eb58631d05682c986a0aca9;p=thirdparty%2Futil-linux.git

sysfs: add helper for /sys/kernel/address_bits
---

diff --git a/include/pathnames.h b/include/pathnames.h
index afb6af56e8..56f64c3870 100644
--- a/include/pathnames.h
+++ b/include/pathnames.h
@@ -120,6 +120,7 @@
 #define _PATH_SYS_CLASS		"/sys/class"
 #define _PATH_SYS_SCSI		"/sys/bus/scsi"
 #define _PATH_SYS_CPU_BYTEORDER	"/sys/kernel/cpu_byteorder"
+#define _PATH_SYS_ADDRESS_BITS	"/sys/kernel/address_bits"
 
 #define _PATH_SYS_SELINUX	"/sys/fs/selinux"
 #define _PATH_SYS_APPARMOR	"/sys/kernel/security/apparmor"
diff --git a/include/sysfs.h b/include/sysfs.h
index 56e125b71f..c538f33a72 100644
--- a/include/sysfs.h
+++ b/include/sysfs.h
@@ -117,5 +117,6 @@ enum sysfs_byteorder {
 };
 
 extern enum sysfs_byteorder sysfs_get_byteorder(struct path_cxt *pc);
+extern int sysfs_get_address_bits(struct path_cxt *pc);
 
 #endif /* UTIL_LINUX_SYSFS_H */
diff --git a/lib/sysfs.c b/lib/sysfs.c
index 56eea5c645..e112606d67 100644
--- a/lib/sysfs.c
+++ b/lib/sysfs.c
@@ -1103,6 +1103,19 @@ out:
 	return ret;
 }
 
+int sysfs_get_address_bits(struct path_cxt *pc)
+{
+	int rc;
+	int address_bits;
+
+	rc = ul_path_scanf(pc, _PATH_SYS_ADDRESS_BITS, "%d", &address_bits);
+	if (rc < 0)
+		return rc;
+	if (address_bits < 0)
+		return -EINVAL;
+	return address_bits;
+}
+
 
 #ifdef TEST_PROGRAM_SYSFS
 #include <errno.h>