linux-kernel - [RFC PATCH 4/6] seq_file: add function to write binary data

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Date:	Mon, 05 May 2008 17:24:37 +0200
From:	Peter Oberparleiter <peter.oberparleiter@...ibm.com>
To:	linux-kernel@...r.kernel.org
CC:	ltp-list@...ts.sourceforge.net, ltp-coverage@...ts.sourceforge.net,
	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: [RFC PATCH 4/6] seq_file: add function to write binary data

From: Peter Oberparleiter <peter.oberparleiter@...ibm.com>

seq_write() can be used to construct seq_files containing arbitrary
data. Required by the gcov-profiling interface to synthesize binary
profiling data files.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@...ibm.com>
---
 fs/seq_file.c            |   12 ++++++++++++
 include/linux/seq_file.h |    1 +
 2 files changed, 13 insertions(+)

Index: linux-2.6.26-rc1/fs/seq_file.c
===================================================================
--- linux-2.6.26-rc1.orig/fs/seq_file.c
+++ linux-2.6.26-rc1/fs/seq_file.c
@@ -554,6 +554,18 @@ int seq_puts(struct seq_file *m, const c
 }
 EXPORT_SYMBOL(seq_puts);
 
+int seq_write(struct seq_file *m, const void *s, size_t len)
+{
+	if (m->count + len < m->size) {
+		memcpy(m->buf + m->count, s, len);
+		m->count += len;
+		return 0;
+	}
+	m->count = m->size;
+	return -1;
+}
+EXPORT_SYMBOL(seq_write);
+
 struct list_head *seq_list_start(struct list_head *head, loff_t pos)
 {
 	struct list_head *lh;
Index: linux-2.6.26-rc1/include/linux/seq_file.h
===================================================================
--- linux-2.6.26-rc1.orig/include/linux/seq_file.h
+++ linux-2.6.26-rc1/include/linux/seq_file.h
@@ -39,6 +39,7 @@ int seq_release(struct inode *, struct f
 int seq_escape(struct seq_file *, const char *, const char *);
 int seq_putc(struct seq_file *m, char c);
 int seq_puts(struct seq_file *m, const char *s);
+int seq_write(struct seq_file *m, const void *s, size_t len);
 
 int seq_printf(struct seq_file *, const char *, ...)
 	__attribute__ ((format (printf,2,3)));


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