From d968b3c86fc59507e3604ebc704aeb111f301a12 Mon Sep 17 00:00:00 2001
From: Jeff Johnston <jjohnstn@redhat.com>
Date: Tue, 31 Jan 2006 19:33:56 +0000
Subject: 2006-01-31  Leif Ekblad  <leif@rdos.net>

        * configure.host: RDOS support added
        * libc/include/sys/config.h: Ditto.
        * libc/sys/rdos/Makefile.am, libc/sys/rdos/Makefile.in: New files.
        * libc/sys/rdos/aclocal.m4, libc/sys/rdos/chown.c: Ditto.
        * libc/sys/rdos/close.c, libc/sys/rdos/config.h: Ditto.
        * libc/sys/rdos/configure, libc/sys/rdos/configure.in: Ditto.
        * libc/sys/rdos/crt0.S, libc/sys/rdos/execve.c: Ditto.
        * libc/sys/rdos/fork.c, libc/sys/rdos/fstat.c: Ditto.
        * libc/sys/rdos/getenv.c, libc/sys/rdos/getpid.c: Ditto.
        * libc/sys/rdos/gettod.c, libc/sys/rdos/isatty.c: Ditto.
        * libc/sys/rdos/kill.c, libc/sys/rdos/link.c: Ditto.
        * libc/sys/rdos/lseek.c, libc/sys/rdos/open.c: Ditto.
        * libc/sys/rdos/rdos.S, libc/sys/rdos/rdos.h: Ditto.
        * libc/sys/rdos/rdoshelp.c, libc/sys/rdos/read.c: Ditto.
        * libc/sys/rdos/readlink.c, libc/sys/rdos/sbrk.c: Ditto.
        * libc/sys/rdos/stat.c, libc/sys/rdos/symlink.c: Ditto.
        * libc/sys/rdos/times.c, libc/sys/rdos/unlink.c: Ditto.
        * libc/sys/rdos/user.def, libc/sys/rdos/wait.c: Ditto.
        * libc/sys/rdos/write.c: Ditto.
---
 newlib/libc/sys/rdos/getenv.c | 83 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 newlib/libc/sys/rdos/getenv.c

(limited to 'newlib/libc/sys/rdos/getenv.c')

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;
+}
-- 
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