diff --git a/components/libc/minilibc/ctype.c b/components/libc/minilibc/ctype.c
index 786ff472f8c3d19e2556eb63498e7c735a362f7e..4fd2dc8fb5425bd19a760197595e138c61d90c96 100644
--- a/components/libc/minilibc/ctype.c
+++ b/components/libc/minilibc/ctype.c
@@ -31,7 +31,23 @@ int isalpha(int ch)
 
 int isdigit (int ch)
 {
-    return (unsigned int)(ch - '0') < 10u;
+	return (unsigned int)(ch - '0') < 10u;
+}
+
+int isspace(int ch)
+{
+	switch(ch)
+	{
+	case ' ':
+	case '\n':
+	case '\f':
+	case '\r':
+	case '\t':
+	case '\v':
+		return 1;
+	default:
+		return 0; 
+	}    
 }
 
 #endif
diff --git a/components/libc/minilibc/ctype.h b/components/libc/minilibc/ctype.h
index 9a773b69abffbeb0a547c59b5f3ee791bdb6ab00..9909b4a0b0998ec5b631bc8be3f23ce7abdb0403 100644
--- a/components/libc/minilibc/ctype.h
+++ b/components/libc/minilibc/ctype.h
@@ -17,5 +17,6 @@
 int isprint(int c) __attribute__ ((__const__));
 int isalpha (int c) __attribute__ ((__const__));
 int isdigit (int ch) __attribute__ ((__const__));
+int isspace(int ch) __attribute__ ((__const__));
 
 #endif
diff --git a/components/libc/minilibc/stdlib.c b/components/libc/minilibc/stdlib.c
index cac4ae5691fa2def5080643308b503f825e6ee49..7185f56bb745f8a10bf7944b31b1a3c36fb368f2 100644
--- a/components/libc/minilibc/stdlib.c
+++ b/components/libc/minilibc/stdlib.c
@@ -37,6 +37,23 @@ int atoi(const char* s)
 	return sign==-1?-v:v;
 }
 
+long int atol(const char* s) 
+{
+	long int v=0;
+	int sign=0;
+	while ( *s == ' '  ||  (unsigned int)(*s - 9) < 5u) ++s;
+	switch (*s) 
+	{
+		case '-': sign=-1;
+		case '+': ++s;
+	}
+	while ((unsigned int) (*s - '0') < 10u) 
+	{
+		v=v*10+*s-'0'; ++s;
+	}
+	return sign?-v:v;
+}
+
 void *malloc(size_t size)
 {
 	return rt_malloc(size);
diff --git a/components/libc/minilibc/stdlib.h b/components/libc/minilibc/stdlib.h
index 9ff5cdd86cb29dc0082e290d3202051fe204c438..08f7e0d07b48c69442ebe29a81211fcdf1b9e60f 100644
--- a/components/libc/minilibc/stdlib.h
+++ b/components/libc/minilibc/stdlib.h
@@ -19,6 +19,7 @@
 
 #if !defined (RT_USING_NEWLIB) && defined (RT_USING_MINILIBC)
 int atoi(const char *nptr);
+long int atol(const char *nptr);
 
 int rand(void);
 int rand_r(unsigned int *seed);