2009-11-18 Chris Johns <chrisj@rtems.org>

        * libmisc/shell/main_getenv.c, libmisc/shell/main_setenv.c,
        libmisc/shell/main_unsetenv.c: New. The shell can now play with
        environment variables.
        * libmisc/Makefile.am, libmisc/shell/shellconfig.h: Add setenv,
        getenv, and unsetenv to the shell.

1 files changed, 43 insertions, 0 deletions

diff --git a/cpukit/libmisc/shell/main_unsetenv.c b/cpukit/libmisc/shell/main_unsetenv.c
new file mode 100644
index 0000000000..91d9dac7a4
--- /dev/null
+++ b/cpukit/libmisc/shell/main_unsetenv.c
@@ -0,0 +1,43 @@
+/*
+ * Unset an environment vairable.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include <rtems.h>
+#include <rtems/shell.h>
+#include "internal.h"
+
+int rtems_shell_main_unsetenv(int argc, char *argv[])
+{
+  if (argc != 2)
+  {
+    printf ("error: only argument is the variable name\n");
+    return 1;
+  }
+
+  if (unsetenv (argv[1]) < 0)
+  {
+    printf ("error: %s\n", strerror (errno));
+    return 1;
+  }
+  
+  return 0;
+}
+
+rtems_shell_cmd_t rtems_shell_UNSETENV_Command = {
+  "unsetenv",                    /* name */
+  "unsetenv [var]",              /* usage */
+  "misc",                        /* topic */
+  rtems_shell_main_unsetenv,     /* command */
+  NULL,                          /* alias */
+  NULL                           /* next */
+};