Commit 045ad464 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Stephen Boyd
Browse files

lib/string_helpers: Add kstrdup_and_replace() helper 



Duplicate a NULL-terminated string and replace all occurrences of
the old character with a new one. In other words, provide functionality
of kstrdup() + strreplace().

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230804143910.15504-2-andriy.shevchenko@linux.intel.com


Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 06c2afb8

include/linux/string_helpers.h

+2 −0
Original line number Diff line number Diff line
@@ -109,6 +109,8 @@ char *kstrdup_quotable(const char *src, gfp_t gfp); 
char *kstrdup_quotable_cmdline(struct task_struct *task, gfp_t gfp);

char *kstrdup_quotable_file(struct file *file, gfp_t gfp);



char *kstrdup_and_replace(const char *src, char old, char new, gfp_t gfp);



char **kasprintf_strarray(gfp_t gfp, const char *prefix, size_t n);

void kfree_strarray(char **array, size_t n);

lib/string_helpers.c

+15 −0
Original line number Diff line number Diff line
@@ -719,6 +719,21 @@ char *kstrdup_quotable_file(struct file *file, gfp_t gfp) 
}

EXPORT_SYMBOL_GPL(kstrdup_quotable_file);



/*

 * Returns duplicate string in which the @old characters are replaced by @new.

 */

char *kstrdup_and_replace(const char *src, char old, char new, gfp_t gfp)

{

	char *dst;



	dst = kstrdup(src, gfp);

	if (!dst)

		return NULL;



	return strreplace(dst, old, new);

}

EXPORT_SYMBOL_GPL(kstrdup_and_replace);



/**

 * kasprintf_strarray - allocate and fill array of sequential strings

 * @gfp: flags for the slab allocator