From 839cc2a94cc3665bafe32203c2f095f4dd470a80 Mon Sep 17 00:00:00 2001 From: Tetsuo Handa Date: Thu, 14 Nov 2013 14:31:56 -0800 Subject: 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 Signed-off-by: Kees Cook Cc: Joe Perches Cc: David Miller Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/seq_file.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'fs/seq_file.c') diff --git a/fs/seq_file.c b/fs/seq_file.c index a290157..1cd2388 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) } EXPORT_SYMBOL(seq_write); +/** + * 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); +} +EXPORT_SYMBOL(seq_pad); + struct list_head *seq_list_start(struct list_head *head, loff_t pos) { struct list_head *lh; -- cgit v1.1