87feda4eb1
This switches environment variables to use linux list. This is easier to read. An additional plus is that the environment variables no longer need an initcall, so malloc is the only requirement for them. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/*
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* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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/**
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* @file
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* @brief printenv: Print out environment variables
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*/
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#include <common.h>
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#include <command.h>
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#include <errno.h>
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#include <environment.h>
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static int do_printenv(int argc, char *argv[])
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{
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struct variable_d *v;
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struct env_context *c;
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if (argc == 2) {
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const char *val = getenv(argv[1]);
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if (val) {
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printf("%s=%s\n", argv[1], val);
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return 0;
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}
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printf("## Error: \"%s\" not defined\n", argv[1]);
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return 1;
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}
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c = get_current_context();
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printf("locals:\n");
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list_for_each_entry(v, &c->local, list)
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printf("%s=%s\n", var_name(v), var_val(v));
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printf("globals:\n");
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c = get_current_context();
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while (c) {
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list_for_each_entry(v, &c->global, list)
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printf("%s=%s\n", var_name(v), var_val(v));
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c = c->parent;
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}
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return 0;
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}
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BAREBOX_CMD_HELP_START(printenv)
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BAREBOX_CMD_HELP_USAGE("printenv [variable]\n")
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BAREBOX_CMD_HELP_SHORT("Print value of one or all environment variables.\n")
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BAREBOX_CMD_HELP_END
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/**
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* @page printenv_command
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<p>If an argument is given, printenv prints the content of an environment
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variable to the terminal. If no argument is specified, all variables are
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printed.</p>
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*/
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BAREBOX_CMD_START(printenv)
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.cmd = do_printenv,
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.usage = "Print value of one or all environment variables.",
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BAREBOX_CMD_HELP(cmd_printenv_help)
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BAREBOX_CMD_END
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