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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>
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@ -109,6 +109,8 @@ char *kstrdup_quotable(const char *src, gfp_t gfp);
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char *kstrdup_quotable_cmdline(struct task_struct *task, gfp_t gfp);
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char *kstrdup_quotable_file(struct file *file, gfp_t gfp);
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char *kstrdup_and_replace(const char *src, char old, char new, gfp_t gfp);
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char **kasprintf_strarray(gfp_t gfp, const char *prefix, size_t n);
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void kfree_strarray(char **array, size_t n);
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@ -719,6 +719,21 @@ char *kstrdup_quotable_file(struct file *file, gfp_t gfp)
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}
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EXPORT_SYMBOL_GPL(kstrdup_quotable_file);
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/*
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* Returns duplicate string in which the @old characters are replaced by @new.
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*/
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char *kstrdup_and_replace(const char *src, char old, char new, gfp_t gfp)
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{
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char *dst;
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dst = kstrdup(src, gfp);
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if (!dst)
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return NULL;
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return strreplace(dst, old, new);
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}
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EXPORT_SYMBOL_GPL(kstrdup_and_replace);
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/**
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* kasprintf_strarray - allocate and fill array of sequential strings
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* @gfp: flags for the slab allocator
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