lib: add generic sysfs utils

Signed-off-by: Karel Zak <kzak@redhat.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/include/sysfs.h b/include/sysfs.h
new file mode 100644
index 000000000..bbb3816c2
--- /dev/null
+++ b/include/sysfs.h
@@ -0,0 +1,57 @@
+/*
+ * 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 <dirent.h>
+#include <fcntl.h>
+#include <string.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <dirent.h>
+
+struct sysfs_cxt {
+	dev_t	devno;
+	int	dir_fd;		/* /sys/block/<name> */
+	char	*dir_path;
+	struct sysfs_cxt *parent;
+};
+
+
+extern char *sysfs_devno_attribute_path(dev_t devno, char *buf,
+                                 size_t buflen, 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 buflen);
+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);
+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 int sysfs_scanf(struct sysfs_cxt *cxt,  const char *attr,
+		       const char *fmt, ...)
+		        __attribute__ ((format (scanf, 3, 4)));
+extern int64_t sysfs_read_s64(struct sysfs_cxt *cxt, const char *attr);
+extern uint64_t sysfs_read_u64(struct sysfs_cxt *cxt, const char *attr);
+extern int sysfs_read_int(struct sysfs_cxt *cxt, const char *attr);
+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 int sysfs_is_partition_dirent(DIR *dir, struct dirent *d,
+			const char *parent_name);
+
+#endif /* UTIL_LINUX_SYSFS_H */