1 files changed, 109 insertions, 0 deletions
diff --git a/ubi-utils/src/libubi_sysfs.h b/ubi-utils/src/libubi_sysfs.h
new file mode 100644
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+++ b/ubi-utils/src/libubi_sysfs.h
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+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * UBI (Unsorted Block Images) library.
+ *
+ * Author: Artem B. Bityutskiy
+ */
+
+/**
+ * sysfs_read_data - read data from a sysfs file.
+ *
+ * @file  path to the file to read from
+ * @buf	  furrer where to store read data
+ * @len	  length of provided buffer @buf
+ *
+ * This function returns the number of read bytes or -1 in case of error.
+ */
+int sysfs_read_data(const char *file, void *buf, int len);
+
+/**
+ * sysfs_read_data_subst - form path to a sysfs file and read data from it.
+ *
+ * @patt  path to the file to read from
+ * @buf	  furrer where to store read data
+ * @len	  length of provided buffer @buf
+ * @n	  number of parameters to substitute to @patt
+ *
+ * This function forms path to a sysfs file by means of substituting parameters
+ * to @patt and then reads @len bytes from this file and stores the read data
+ * to @buf. This function returns the number of read bytes or -1 in case of
+ * error.
+ */
+int sysfs_read_data_subst(const char *patt, void *buf, int len, int n, ...);
+
+/**
+ * sysfs_read_dev - read major and minor number from a sysfs file.
+ *
+ * @file   path to the file to read from
+ * @major  major number is returned here
+ * @minor  minor number is returned here
+ */
+int sysfs_read_dev(const char *file, unsigned int *major,
+		unsigned int *minor);
+/**
+ * sysfs_read_dev_subst - for path to a file and read major and minor number
+ * from it.
+ *
+ * @patt   pattern of the path to the file to read from
+ * @major  major number is returned here
+ * @minor  minor number is returned here
+ * @n	   number of arguments to substitute
+ *
+ * This function substitures arguments to the @patt file path pattern and reads
+ * major and minor numbers from the resulting file.
+ */
+int sysfs_read_dev_subst(const char *patt, unsigned int *major,
+		unsigned int *minor, int n, ...);
+
+/**
+ * sysfs_read_ull_subst - form path to a sysfs file and read an unsigned long
+ * long value from there.
+ *
+ * @patt  pattern of file path
+ * @num	  the read value is returned here
+ * @n	  number of parameters to substitute
+ *
+ *
+ * This function first forms the path to a sysfs file by means of substituting
+ * passed parameters to the @patt string, and then read an 'unsigned long long'
+ * value from this file.
+ */
+int sysfs_read_ull_subst(const char *patt, unsigned long long *num,
+		int n, ...);
+
+/**
+ * sysfs_read_uint_subst - the same as 'sysfs_read_uint_subst()' but reads an
+ * unsigned int value.
+ */
+int sysfs_read_uint_subst(const char *patt, unsigned int *num,
+		int n, ...);
+
+/**
+ * sysfs_read_ll - read a long long integer from an UBI sysfs file.
+ *
+ * @file  file name from where to read
+ * @num	  the result is returned here
+ */
+int sysfs_read_ll(const char *file, long long *num);
+
+/**
+ * sysfs_read_int - the same as 'sysfs_read_ll()' but reads an 'int' value.
+ */
+int sysfs_read_int(const char *file, int *num);