diff options
| author | Peter Oberparleiter <oberpar@linux.vnet.ibm.com> | 2009-06-17 16:28:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-18 13:03:57 -0700 |
| commit | 0b923606e75f1ab672e25b14ac039a1cdcfa382f (patch) | |
| tree | 7661aaea6d8809b002cd03f910122f87eb35608a | |
| parent | b99b87f70c7785ab1e253c6220f4b0b57ce3a7f7 (diff) | |
seq_file: add function to write binary data
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 <oberpar@linux.vnet.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Li Wei <W.Li@Sun.COM>
Cc: Michael Ellerman <michaele@au1.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Heiko Carstens <heicars2@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <mschwid2@linux.vnet.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/seq_file.c | 20 | ||||
| -rw-r--r-- | include/linux/seq_file.h | 1 |
2 files changed, 21 insertions, 0 deletions
diff --git a/fs/seq_file.c b/fs/seq_file.c index 7f40f30c55c5..6c959275f2d0 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -640,6 +640,26 @@ int seq_puts(struct seq_file *m, const char *s) } EXPORT_SYMBOL(seq_puts); +/** + * seq_write - write arbitrary data to buffer + * @seq: seq_file identifying the buffer to which data should be written + * @data: data address + * @len: number of bytes + * + * Return 0 on success, non-zero otherwise. + */ +int seq_write(struct seq_file *seq, const void *data, size_t len) +{ + if (seq->count + len < seq->size) { + memcpy(seq->buf + seq->count, data, len); + seq->count += len; + return 0; + } + seq->count = seq->size; + return -1; +} +EXPORT_SYMBOL(seq_write); + struct list_head *seq_list_start(struct list_head *head, loff_t pos) { struct list_head *lh; diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h index 004f3b3342c5..0c6a86b79596 100644 --- a/include/linux/seq_file.h +++ b/include/linux/seq_file.h @@ -43,6 +43,7 @@ int seq_release(struct inode *, struct file *); 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 *seq, const void *data, size_t len); int seq_printf(struct seq_file *, const char *, ...) __attribute__ ((format (printf,2,3))); |