139 lines
4.8 KiB
C
139 lines
4.8 KiB
C
/****************************************************************************
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* nsh_envcmds.c
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*
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* Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "nsh.h"
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: cmd_echo
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****************************************************************************/
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void cmd_echo(FAR void *handle, int argc, char **argv)
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{
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int i;
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/* echo each argument, separated by a space as it must have been on the
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* command line
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*/
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for (i = 1; i < argc; i++)
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{
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/* Check for references to environment variables */
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#ifndef CONFIG_DISABLE_ENVIRON
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if (argv[i][0] == '$')
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{
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char *value = getenv(argv[i]+1);
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if (value)
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{
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nsh_output(handle, "%s ", value);
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}
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}
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else
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#endif
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{
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nsh_output(handle, "%s ", argv[i]);
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}
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}
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nsh_output(handle, "\n");
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}
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/****************************************************************************
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* Name: cmd_set
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****************************************************************************/
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#ifndef CONFIG_DISABLE_ENVIRON
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void cmd_set(FAR void *handle, int argc, char **argv)
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{
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if (setenv(argv[1], argv[2], TRUE) < 0)
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{
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nsh_output(handle, g_fmtcmdfailed, argv[0], "setenv", NSH_ERRNO);
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}
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}
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#endif
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/****************************************************************************
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* Name: cmd_unset
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****************************************************************************/
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#ifndef CONFIG_DISABLE_ENVIRON
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void cmd_unset(FAR void *handle, int argc, char **argv)
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{
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if (unsetenv(argv[1]) < 0)
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{
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nsh_output(handle, g_fmtcmdfailed, argv[0], "unsetenv", NSH_ERRNO);
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}
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}
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#endif
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