1 files changed, 35 insertions, 0 deletions
diff --git a/strings/strstr.c b/strings/strstr.c
new file mode 100644
index 00000000000..572bf88c95c
--- /dev/null
+++ b/strings/strstr.c
@@ -0,0 +1,35 @@
+/*  File   : strstr.c
+    Author : Monty
+    Updated: 1986.11.24
+    Defines: strstr()
+
+    strstr(src, pat) looks for an instance of pat in src.  pat is not a
+    regex(3) pattern, it is a literal string which must be matched exactly.
+    The result is a pointer to the first character of the located instance,
+    or NullS if pat does not occur in src.
+
+*/
+
+#include <global.h>
+#include "m_string.h"
+
+#ifndef HAVE_STRSTR
+
+char *strstr(register const char *str,const char *search)
+{
+ register char *i,*j;
+ register char first= *search;
+
+skipp:
+  while (*str != '\0') {
+    if (*str++ == first) {
+      i=(char*) str; j=(char*) search+1;
+      while (*j)
+	if (*i++ != *j++) goto skipp;
+      return ((char*) str-1);
+    }
+  }
+  return ((char*) 0);
+} /* strstr */
+
+#endif