Merge branch 'master' into iscsi-update

src/core/refcnt.c

  * Increment reference count
  *
  * @v refcnt		Reference counter, or NULL
+ * @ret refcnt		Reference counter
  *
  * If @c refcnt is NULL, no action is taken.
  */
-void ref_get ( struct refcnt *refcnt ) {
+struct refcnt * ref_get ( struct refcnt *refcnt ) {
 
-	if ( ! refcnt )
-		return;
-
-	refcnt->refcnt++;
-
-	DBGC2 ( refcnt, "REFCNT %p incremented to %d\n",
-		refcnt, refcnt->refcnt );
+	if ( refcnt ) {
+		refcnt->refcnt++;
+		DBGC2 ( refcnt, "REFCNT %p incremented to %d\n",
+			refcnt, refcnt->refcnt );
+	}
+	return refcnt;
 }
 
 /**

src/core/string.c

 }
 #endif
 
+#ifndef __HAVE_ARCH_STRCSPN
+/**
+ * strcspn - Calculate the length of the initial substring of @s which only
+ * 	contain letters not in @reject
+ * @s: The string to be searched
+ * @accept: The string to search for
+ */
+size_t strcspn(const char *s, const char *reject)
+{
+	const char *p;
+	const char *r;
+	size_t count = 0;
+
+	for (p = s; *p != '\0'; ++p) {
+		for (r = reject; *r != '\0'; ++r) {
+			if (*p == *r)
+				return count;
+		}
+		++count;
+	}
+
+	return count;
+}
+#endif
+
 #ifndef __HAVE_ARCH_STRPBRK
 /**
  * strpbrk - Find the first occurrence of a set of characters
 
 #endif
 
-char * strdup(const char *s) {
-	char *new = malloc(strlen(s)+1);
-	if (new)
-		strcpy(new,s);
+char * strndup(const char *s, size_t n)
+{
+	size_t len = strlen(s);
+	char *new;
+
+	if (len>n)
+		len = n;
+	new = malloc(len+1);
+	if (new) {
+		new[len] = '\0';
+		memcpy(new,s,len);
+	}
 	return new;
 }
+
+char * strdup(const char *s) {
+	return strndup(s, ~((size_t)0));
+}

src/include/gpxe/refcnt.h

 	void ( * free ) ( struct refcnt *refcnt );
 };
 
-extern void ref_get ( struct refcnt *refcnt );
+extern struct refcnt * ref_get ( struct refcnt *refcnt );
 extern void ref_put ( struct refcnt *refcnt );
 
 #endif /* _GPXE_REFCNT_H */

src/include/string.h

 size_t strlen(const char * s);
 size_t strnlen(const char * s, size_t count);
 size_t strspn(const char *s, const char *accept);
+size_t strcspn(const char *s, const char *reject);
 char * strpbrk(const char * cs,const char * ct);
 char * strtok(char * s,const char * ct);
 char * strsep(char **s, const char *ct);
 char * strstr(const char * s1,const char * s2);
 void * memchr(const void *s, int c, size_t n);
 char * strdup(const char *s);
+char * strndup(const char *s, size_t n);
 
 extern const char * strerror ( int errno );