Imported Upstream version 2.22upstream/2.22upstream

1 files changed, 68 insertions, 0 deletions

diff --git a/include/sysfs.h b/include/sysfs.h
new file mode 100644
index 0000000..9e47a55
--- /dev/null
+++ b/include/sysfs.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2011 Karel Zak <kzak@redhat.com>
+ */
+#ifndef UTIL_LINUX_SYSFS_H
+#define UTIL_LINUX_SYSFS_H
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <inttypes.h>
+#include <dirent.h>
+
+struct sysfs_cxt {
+	dev_t	devno;
+	int	dir_fd;		/* /sys/block/<name> */
+	char	*dir_path;
+	struct sysfs_cxt *parent;
+};
+
+#define UL_SYSFSCXT_EMPTY { 0, -1, NULL, NULL }
+
+extern char *sysfs_devno_attribute_path(dev_t devno, char *buf,
+                                 size_t bufsiz, const char *attr);
+extern int sysfs_devno_has_attribute(dev_t devno, const char *attr);
+extern char *sysfs_devno_path(dev_t devno, char *buf, size_t bufsiz);
+extern char *sysfs_devno_to_devpath(dev_t devno, char *buf, size_t bufsiz);
+extern dev_t sysfs_devname_to_devno(const char *name, const char *parent);
+
+extern int sysfs_init(struct sysfs_cxt *cxt, dev_t devno, struct sysfs_cxt *parent)
+					__attribute__ ((warn_unused_result));
+extern void sysfs_deinit(struct sysfs_cxt *cxt);
+
+extern DIR *sysfs_opendir(struct sysfs_cxt *cxt, const char *attr);
+
+extern int sysfs_stat(struct sysfs_cxt *cxt, const char *attr, struct stat *st);
+extern ssize_t sysfs_readlink(struct sysfs_cxt *cxt, const char *attr,
+	                   char *buf, size_t bufsiz);
+extern int sysfs_has_attribute(struct sysfs_cxt *cxt, const char *attr);
+
+extern int sysfs_scanf(struct sysfs_cxt *cxt,  const char *attr,
+		       const char *fmt, ...)
+		        __attribute__ ((format (scanf, 3, 4)));
+
+extern int sysfs_read_s64(struct sysfs_cxt *cxt, const char *attr, int64_t *res);
+extern int sysfs_read_u64(struct sysfs_cxt *cxt, const char *attr, uint64_t *res);
+extern int sysfs_read_int(struct sysfs_cxt *cxt, const char *attr, int *res);
+
+extern char *sysfs_get_devname(struct sysfs_cxt *cxt, char *buf, size_t bufsiz);
+
+extern char *sysfs_strdup(struct sysfs_cxt *cxt, const char *attr);
+
+extern int sysfs_count_dirents(struct sysfs_cxt *cxt, const char *attr);
+extern int sysfs_count_partitions(struct sysfs_cxt *cxt, const char *devname);
+extern dev_t sysfs_partno_to_devno(struct sysfs_cxt *cxt, int partno);
+extern char *sysfs_get_slave(struct sysfs_cxt *cxt);
+
+extern int sysfs_is_partition_dirent(DIR *dir, struct dirent *d,
+			const char *parent_name);
+
+extern int sysfs_devno_to_wholedisk(dev_t dev, char *diskname,
+            size_t len, dev_t *diskdevno);
+#endif /* UTIL_LINUX_SYSFS_H */