diff options
Diffstat (limited to 'mm/util.c')
| -rw-r--r-- | mm/util.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/mm/util.c b/mm/util.c index 4fb14ca5a419..4f841e51182e 100644 --- a/mm/util.c +++ b/mm/util.c @@ -3,6 +3,7 @@ #include <linux/string.h> #include <linux/compiler.h> #include <linux/export.h> +#include <linux/ctype.h> #include <linux/err.h> #include <linux/sched.h> #include <linux/security.h> @@ -100,6 +101,35 @@ char *kstrndup(const char *s, size_t max, gfp_t gfp) EXPORT_SYMBOL(kstrndup); /** + * kstrimdup - Trim and copy a %NUL terminated string. + * @s: the string to trim and duplicate + * @gfp: the GFP mask used in the kmalloc() call when allocating memory + * + * Returns an address, which the caller must kfree, containing + * a duplicate of the passed string with leading and/or trailing + * whitespace (as defined by isspace) removed. + */ +char *kstrimdup(const char *s, gfp_t gfp) +{ + char *buf; + char *begin = skip_spaces(s); + size_t len = strlen(begin); + + while (len && isspace(begin[len - 1])) + len--; + + buf = kmalloc_track_caller(len + 1, gfp); + if (!buf) + return NULL; + + memcpy(buf, begin, len); + buf[len] = '\0'; + + return buf; +} +EXPORT_SYMBOL(kstrimdup); + +/** * kmemdup - duplicate region of memory * * @src: memory region to duplicate |