[PATCH] Add strndup implementation for systems with lack of it

[Vladimir Marek]

From: Vladimir Marek <vlmarek(a)volny.cz&gt;

Solaris 10 FCS (first release) does not have strndup implementation.

Signed-off-by: Vladimir Marek <vlmarek(a)volny.cz&gt;
---
 configure.ac |    2 +-
 strndup.c    |   23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)
 create mode 100644 strndup.c

diff --git a/configure.ac b/configure.ac
index a92e81c..5d20cd9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -371,7 +371,7 @@ AC_CHECK_TYPE(ssize_t, int)
 
 AC_CHECK_FUNCS(fgetpos memmove setegid srand48 strerror)
 
-AC_REPLACE_FUNCS([setenv strcasecmp strdup strsep strtok_r wcscasecmp])
+AC_REPLACE_FUNCS([setenv strcasecmp strdup strsep strtok_r wcscasecmp strndup])
 AC_REPLACE_FUNCS([strcasestr mkdtemp])
 
 AC_CHECK_FUNC(getopt)
diff --git a/strndup.c b/strndup.c
new file mode 100644
index 0000000..81557ba
--- /dev/null
+++ b/strndup.c
@@ -0,0 +1,23 @@
+/* Solaris 10 FCS does not have strndup */
+
+#include <string.h>
+#include <stdlib.h>
+
+char *
+strndup(const char *s, size_t n)
+{
+    size_t len;
+    char *ret;
+                                                                                         
                                                                   
+    if (!s)
+        return (char *)NULL;
+                                                                                         
                                                                   
+    len = strlen(s);
+    if (n < len)
+        len = n;
+
+    ret = malloc(len + 1); /* To store '\0' */
+    memcpy(ret, s, len);
+    ret[len] = '\0';
+    return ret;
+}
-- 
1.7.9.2