/****************************************************************************
* nsh_envcmds.c
*
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name Gregory Nutt nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "nsh.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: cmd_echo
****************************************************************************/
void cmd_echo(FAR void *handle, int argc, char **argv)
{
int i;
/* echo each argument, separated by a space as it must have been on the
* command line
*/
for (i = 1; i < argc; i++)
{
/* Check for references to environment variables */
#ifndef CONFIG_DISABLE_ENVIRON
if (argv[i][0] == '$')
{
char *value = getenv(argv[i]+1);
if (value)
{
nsh_output(handle, "%s ", value);
}
}
else
#endif
{
nsh_output(handle, "%s ", argv[i]);
}
}
nsh_output(handle, "\n");
}
/****************************************************************************
* Name: cmd_set
****************************************************************************/
#ifndef CONFIG_DISABLE_ENVIRON
void cmd_set(FAR void *handle, int argc, char **argv)
{
if (setenv(argv[1], argv[2], TRUE) < 0)
{
nsh_output(handle, g_fmtcmdfailed, argv[0], "setenv", strerror(errno));
}
}
#endif
/****************************************************************************
* Name: cmd_unset
****************************************************************************/
#ifndef CONFIG_DISABLE_ENVIRON
void cmd_unset(FAR void *handle, int argc, char **argv)
{
if (unsetenv(argv[1]) < 0)
{
nsh_output(handle, g_fmtcmdfailed, argv[0], "unsetenv", strerror(errno));
}
}
#endif
