path: root/fs/seq_file.c
diff options
authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>2013-11-14 14:31:56 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-15 09:32:20 +0900
commit839cc2a94cc3665bafe32203c2f095f4dd470a80 (patch)
treec48aa0e5bcd3f09ad5b7354396a50928c9211155 /fs/seq_file.c
parent57f4257eae33e036125973858934730250d464e3 (diff)
seq_file: introduce seq_setwidth() and seq_pad()
There are several users who want to know bytes written by seq_*() for alignment purpose. Currently they are using %n format for knowing it because seq_*() returns 0 on success. This patch introduces seq_setwidth() and seq_pad() for allowing them to align without using %n format. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Joe Perches <joe@perches.com> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/seq_file.c')
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/seq_file.c b/fs/seq_file.c
index a290157265ef..1cd2388ca5bd 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -766,6 +766,21 @@ int seq_write(struct seq_file *seq, const void *data, size_t len)
+ * seq_pad - write padding spaces to buffer
+ * @m: seq_file identifying the buffer to which data should be written
+ * @c: the byte to append after padding if non-zero
+ */
+void seq_pad(struct seq_file *m, char c)
+ int size = m->pad_until - m->count;
+ if (size > 0)
+ seq_printf(m, "%*s", size, "");
+ if (c)
+ seq_putc(m, c);
struct list_head *seq_list_start(struct list_head *head, loff_t pos)
struct list_head *lh;