This patch adds optional support for strndup.
Signed-off-by: Grant Erickson <[email protected]>
---
include/linux/string.h | 3 +++
lib/string.c | 21 +++++++++++++++++++++
2 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/include/linux/string.h b/include/linux/string.h
index 6239039..5668290 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -59,6 +59,9 @@ extern __kernel_size_t strnlen(const char *,__kernel_size_t);
#ifndef __HAVE_ARCH_STRDUP
extern char * strdup(const char *);
#endif
+#ifndef __HAVE_ARCH_STRNDUP
+extern char * strndup(const char *,__kernel_size_t);
+#endif
#ifndef __HAVE_ARCH_STRSWAB
extern char * strswab(const char *);
#endif
diff --git a/lib/string.c b/lib/string.c
index 2c4f0ec..5fb6693 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -260,6 +260,27 @@ char * strdup(const char *s)
}
#endif
+#ifndef __HAVE_ARCH_STRNDUP
+char * strndup(const char *s, size_t n)
+{
+ size_t len;
+ char *new;
+
+ len = strnlen(s, n);
+
+ if ((s == NULL) ||
+ ((new = malloc (len + 1)) == NULL) ) {
+ return NULL;
+ }
+
+ strncpy (new, s, len);
+
+ new[len] = '\0';
+
+ return new;
+}
+#endif
+
#ifndef __HAVE_ARCH_STRSPN
/**
* strspn - Calculate the length of the initial substring of @s which only
--
1.7.7.3
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