2 files changed, 25 insertions, 1 deletions
diff --git a/duser.c b/duser.c
index b8f7278..776e142 100644
--- a/duser.c
+++ b/duser.c
@@ -1,4 +1,5 @@
 #define _GNU_SOURCE
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -9,6 +10,11 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <libgen.h>
+
+#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 1)
+#	define HAVE_STRCHRNUL
+#endif
+
 #include "duser.h"
 
 char list_path[PATH_MAX];
@@ -25,6 +31,18 @@ int CMD_FLAG_HELP = 0;
 int CMD_FLAG_LOOK = 0;
 int CMD_FLAG_NULL = 0;
 
+#ifndef HAVE_STRCHRNUL
+char *dstrchrnul(const char* s, int c)
+{
+	while(*s && *s != c)
+	{
+		s++;
+	}
+
+	return (char*)s;
+}
+#endif
+
 int user_del_list(const char* filename)
 {
 	char tmp[PATH_MAX];
diff --git a/duser.h b/duser.h
index 2ed8674..15bc82b 100644
--- a/duser.h
+++ b/duser.h
@@ -1,7 +1,12 @@
 #ifndef DUSER_H
 #define DUSER_H
-#include <limits.h>
 
+
+#ifndef HAVE_STRCHRNUL
+#	define	strchrnul(s, c)	dstrchrnul(s, c)
+#endif
+
+#include <limits.h>
 #define REGEX_MAX   255
 #define CFG_PATH "/usr/local/etc/duser"
 #define SELF	__FUNCTION__
@@ -44,5 +49,6 @@ int user_del(record_t* rec);
 int user_cmd(const int argc, char* argv[]);
 int user_choice(char c);
 int user_add(const char* filename, const char* needle);
+char *dstrchrnul(const char* s, int c);
 
 #endif