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, 75 insertions, 0 deletions

diff --git a/cpukit/libmisc/shell/main_setenv.c b/cpukit/libmisc/shell/main_setenv.c
new file mode 100644
index 0000000000..7164c27f9a
--- /dev/null
+++ b/cpukit/libmisc/shell/main_setenv.c
@@ -0,0 +1,75 @@
+/*
+ * Set 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_setenv(int argc, char *argv[])
+{
+  char* env = NULL;
+  char* string = NULL;
+  int   len = 0;
+  int   arg;
+  char* p;
+
+  if (argc <= 2)
+  {
+    printf ("error: no variable or string\n");
+    return 1;
+  }
+
+  env = argv[1];
+  
+  for (arg = 2; arg < argc; arg++)
+    len += strlen (argv[arg]);
+
+  len += argc - 2 - 1;
+
+  string = malloc (len + 1);
+  
+  if (!string)
+  {
+    printf ("error: no memory\n");
+    return 1;
+  }
+  
+  for (arg = 2, p = string; arg < argc; arg++)
+  {
+    strcpy (p, argv[arg]);
+    p += strlen (argv[arg]);
+    if (arg < (argc - 1))
+    {
+      *p = ' ';
+      p++;
+    }
+  }
+  
+  if (setenv (env, string, 1) < 0)
+  {
+    printf ("error: %s\n", strerror (errno));
+    return 1;
+  }
+
+  return 0;
+}
+
+rtems_shell_cmd_t rtems_shell_SETENV_Command = {
+  "setenv",                      /* name */
+  "setenv [var] [string]",       /* usage */
+  "misc",                        /* topic */
+  rtems_shell_main_setenv,       /* command */
+  NULL,                          /* alias */
+  NULL                           /* next */
+};