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vfs, seqfile: make mangle_path() global

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Impact: expose new VFS API

make mangle_path() available, as per the suggestions of Christoph Hellwig
and Al Viro:

  http://lkml.org/lkml/2008/11/4/338

Signed-off-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Török Edwin 2008-11-22 13:28:48 +02:00 committed by Ingo Molnar
parent 02b67518e2
commit 74e2f334f4
2 changed files with 14 additions and 1 deletions
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14
fs/seq_file.c
View file

@ -357,7 +357,18 @@ int seq_printf(struct seq_file *m, const char *f, ...)
}
EXPORT_SYMBOL(seq_printf);
static char *mangle_path(char *s, char *p, char *esc)
/**
* mangle_path - mangle and copy path to buffer beginning
* @s - buffer start
* @p - beginning of path in above buffer
* @esc - set of characters that need escaping
*
* Copy the path from @p to @s, replacing each occurrence of character from
* @esc with usual octal escape.
* Returns pointer past last written character in @s, or NULL in case of
* failure.
*/
char *mangle_path(char *s, char *p, char *esc)
{
while (s <= p) {
char c = *p++;
@ -376,6 +387,7 @@ static char *mangle_path(char *s, char *p, char *esc)
}
return NULL;
}
EXPORT_SYMBOL_GPL(mangle_path);
/*
* return the absolute path of 'dentry' residing in mount 'mnt'.

1
include/linux/seq_file.h
View file

@ -34,6 +34,7 @@ struct seq_operations {
#define SEQ_SKIP 1
char *mangle_path(char *s, char *p, char *esc);
int seq_open(struct file *, const struct seq_operations *);
ssize_t seq_read(struct file *, char __user *, size_t, loff_t *);
loff_t seq_lseek(struct file *, loff_t, int);