X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=platform%2Fexample%2Ffunctions%2Fstdlib%2Fgetenv.c;fp=platform%2Fexample%2Ffunctions%2Fstdlib%2Fgetenv.c;h=aa2817aef661981236cd2a49d895e9d633e2f0c7;hb=3f6094115e79a45413f08361b68b71eb08da306e;hp=0000000000000000000000000000000000000000;hpb=6fbd6cb9dd668081a85f27d4aedae604bd03c6d8;p=pdclib

diff --git a/platform/example/functions/stdlib/getenv.c b/platform/example/functions/stdlib/getenv.c
new file mode 100644
index 0000000..aa2817a
--- /dev/null
+++ b/platform/example/functions/stdlib/getenv.c
@@ -0,0 +1,48 @@
+/* $Id$ */
+
+/* Release $Name$ */
+
+/* getenv( const char * )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+/* This is an example implementation of getenv() fit for use with POSIX kernels.
+*/
+
+#include <string.h>
+#include <stdlib.h>
+
+#ifndef REGTEST
+
+extern char * * environ;
+
+char * getenv( const char * name )
+{
+    size_t len = strlen( name );
+    size_t index = 0;
+    while ( environ[ index ] != NULL )
+    {
+        if ( strncmp( environ[ index ], name, len ) == 0 )
+        {
+            return environ[ index ] + len + 1;
+        }
+        index++;
+    }
+    return NULL;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main()
+{
+    BEGIN_TESTS;
+    TESTCASE( strcmp( getenv( "SHELL" ), "/bin/sh" ) == 0 );
+    return TEST_RESULTS;
+}
+
+#endif