1 files changed, 25 insertions, 0 deletions
diff --git a/src/userspace/libc/string/strstr.c b/src/userspace/libc/string/strstr.c
new file mode 100644
index 0000000..c87f3fc
--- /dev/null
+++ b/src/userspace/libc/string/strstr.c
@@ -0,0 +1,25 @@
+#include <stdint.h>
+#include <string.h>
+
+char *strstr(char *in, char *str)
+{
+	char c;
+	u32 len;
+
+	c = *str++;
+	if (!c)
+		return (char *)in;
+
+	len = strlen(str);
+	do {
+		char sc;
+
+		do {
+			sc = *in++;
+			if (!sc)
+				return (char *)0;
+		} while (sc != c);
+	} while (strncmp(in, str, len) != 0);
+
+	return (char *)(in - 1);
+}
+\ No newline at end of file