1 files changed, 83 insertions, 0 deletions
diff --git a/newlib/libc/sys/rdos/getenv.c b/newlib/libc/sys/rdos/getenv.c
new file mode 100644
index 000000000..933ea4d76
--- /dev/null
+++ b/newlib/libc/sys/rdos/getenv.c
@@ -0,0 +1,83 @@
+/*#######################################################################
+# RDOS operating system
+# Copyright (C) 1988-2006, Leif Ekblad
+#
+# This library is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published
+# by the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
+#
+# The author of this program may be contacted at leif@rdos.net
+#
+# getenv.c                                                                
+# getenv function implementation
+#
+##########################################################################*/
+
+/*
+FUNCTION
+<<getenv>>---look up environment variable
+
+INDEX
+	getenv
+INDEX
+	environ
+
+ANSI_SYNOPSIS
+	#include <stdlib.h>
+	char *getenv(const char *<[name]>);
+
+TRAD_SYNOPSIS
+	#include <stdlib.h>
+	char *getenv(<[name]>)
+	char *<[name]>;
+
+DESCRIPTION
+<<getenv>> searches the list of environment variable names and values
+(using the global pointer ``<<char **environ>>'') for a variable whose
+name matches the string at <[name]>.  If a variable name matches,
+<<getenv>> returns a pointer to the associated value.
+
+RETURNS
+A pointer to the (string) value of the environment variable, or
+<<NULL>> if there is no such environment variable.
+
+PORTABILITY
+<<getenv>> is ANSI, but the rules for properly forming names of environment
+variables vary from one system to another.
+
+This function is not thread-safe, but does it need to be??
+There is an reentrant class that should be used if reentrance is required
+
+*/
+
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <rdos.h>
+
+static char envbuf[256];
+
+char *getenv(const char *name)
+{
+    int handle;
+    char *ptr = 0;
+
+    handle = RdosOpenSysEnv();
+    if (handle)
+    {
+        if (RdosFindEnvVar(handle, name, envbuf))
+            ptr = envbuf;
+    }
+    RdosCloseEnv(handle);
+    return ptr;
+}