1 files changed, 34 insertions, 0 deletions
diff --git a/setenv.c b/setenv.c
new file mode 100644
index 0000000..03c7062
--- /dev/null
+++ b/setenv.c
@@ -0,0 +1,34 @@
+ /*
+  * Some systems do not have setenv(). This one is modeled after 4.4 BSD, but
+  * is implemented in terms of portable primitives only: getenv(), putenv()
+  * and malloc(). It should therefore be safe to use on every UNIX system.
+  * 
+  * If clobber == 0, do not overwrite an existing variable.
+  * 
+  * Returns nonzero if memory allocation fails.
+  * 
+  * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
+  */
+
+#ifndef lint
+static char sccsid[] = "@(#) setenv.c 1.1 93/03/07 22:47:58";
+#endif
+
+/* setenv - update or insert environment (name,value) pair */
+
+int     setenv(name, value, clobber)
+char   *name;
+char   *value;
+int     clobber;
+{
+    char   *malloc();
+    char   *getenv();
+    char   *cp;
+
+    if (clobber == 0 && getenv(name) != 0)
+	return (0);
+    if ((cp = malloc(strlen(name) + strlen(value) + 2)) == 0)
+	return (1);
+    sprintf(cp, "%s=%s", name, value);
+    return (putenv(cp));
+}