diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2023-08-04 17:39:07 +0300 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2023-08-04 18:21:50 -0700 |
| commit | 045ad46441a1cf2ff358af0126f8c57f337804fa (patch) | |
| tree | 0d8745d448f22648486c123c18e055aef20be105 | |
| parent | 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5 (diff) | |
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: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230804143910.15504-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
| -rw-r--r-- | include/linux/string_helpers.h | 2 | ||||
| -rw-r--r-- | lib/string_helpers.c | 15 |
2 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/string_helpers.h b/include/linux/string_helpers.h index 789ab30045da..9d1f5bb74dd5 100644 --- a/include/linux/string_helpers.h +++ b/include/linux/string_helpers.h @@ -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); diff --git a/lib/string_helpers.c b/lib/string_helpers.c index d3b1dd718daf..9982344cca34 100644 --- a/lib/string_helpers.c +++ b/lib/string_helpers.c @@ -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 |