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authorJuergen Beisert <j.beisert@pengutronix.de>2007-11-09 22:09:25 +0100
committerJuergen Beisert <j.beisert@pengutronix.de>2007-11-12 16:28:23 +0100
commit2966bba2160e3d9e828c1eadcd9a35a84878e664 (patch)
treec2ccd53a132be3f50c63cae10716c31012f20d03 /commands/printenv.c
parentd59c600c656d08410ea862c582fbd77432c3ca47 (diff)
downloadbarebox-2966bba2160e3d9e828c1eadcd9a35a84878e664.tar.gz
separating environment commands, part 1
Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>
Diffstat (limited to 'commands/printenv.c')
-rw-r--r--commands/printenv.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/commands/printenv.c b/commands/printenv.c
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+++ b/commands/printenv.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/**
+ * @file
+ * @brief printenv: Print out environment variables
+ */
+
+#include <common.h>
+#include <command.h>
+#include <errno.h>
+#include <environment.h>
+
+static int do_printenv (cmd_tbl_t *cmdtp, int argc, char *argv[])
+{
+ struct variable_d *var;
+ struct env_context *c, *current_c;
+
+ if (argc == 2) {
+ const char *val = getenv(argv[1]);
+ if (val) {
+ printf("%s=%s\n", argv[1], val);
+ return 0;
+ }
+ printf("## Error: \"%s\" not defined\n", argv[1]);
+ return -EINVAL;
+ }
+
+ current_c = get_current_context();
+ var = current_c->local->next;
+ printf("locals:\n");
+ while (var) {
+ printf("%s=%s\n", var_name(var), var_val(var));
+ var = var->next;
+ }
+
+ printf("globals:\n");
+ c = get_current_context();
+ while(c) {
+ var = c->global->next;
+ while (var) {
+ printf("%s=%s\n", var_name(var), var_val(var));
+ var = var->next;
+ }
+ c = c->parent;
+ }
+
+ return 0;
+}
+
+U_BOOT_CMD_START(printenv)
+ .maxargs = CONFIG_MAXARGS,
+ .cmd = do_printenv,
+ .usage = "print environment variables",
+ U_BOOT_CMD_HELP(
+ "\n - print values of all environment variables\n"
+ "printenv name ...\n"
+ " - print value of environment variable 'name'\n")
+U_BOOT_CMD_END
+
+/**
+ * @page printenv_command printenv
+ *
+ * Usage: printenv [\<name>]
+ *
+ * Print environment variables.
+ * If \<name> was given, it prints out its content if the environment variable
+ * \<name> exists.
+ *
+ * Without the \<name> argument all current environment variables are printed.
+ */