[PATCH 2/2] tools/nolibc: Add fseek() to stdio.h

[Daniel Palmer <daniel@thingy.jp>]

A very basic wrapper around lseek() that implements fseek().

Signed-off-by: Daniel Palmer <daniel@thingy.jp>
---
 tools/include/nolibc/stdio.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/tools/include/nolibc/stdio.h b/tools/include/nolibc/stdio.h
index 21569ebae824..d352ffa655a7 100644
--- a/tools/include/nolibc/stdio.h
+++ b/tools/include/nolibc/stdio.h
@@ -273,6 +273,25 @@ char *fgets(char *s, int size, FILE *stream)
 }
 
 
+/* fseek */
+static __attribute__((unused))
+int fseek(FILE *stream, long offset, int whence)
+{
+	int fd = fileno(stream);
+	off_t ret;
+
+	ret = lseek(fd, offset, whence);
+
+	/* lseek() and fseek() differ in that lseek returns the new
+	 * position or -1, fseek() returns either 0 or -1.
+	 */
+	if (ret >= 0)
+		return 0;
+
+	return -1;
+}
+
+
 /* minimal printf(). It supports the following formats:
  *  - %[l*]{d,u,c,x,p}
  *  - %s
-- 
2.51.0