/****************************************************************************
* examples/nsh/nsh_serial.h
*
* 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 <stdarg.h>
#include "nsh.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
struct serial_s
{
int ss_refs; /* Reference counts on the intance */
char ss_line[CONFIG_EXAMPLES_NSH_LINELEN];
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nsh_allocstruct
****************************************************************************/
static inline FAR struct serial_s *nsh_allocstruct(void)
{
struct serial_s *pstate = (struct serial_s *)malloc(sizeof(struct serial_s));
if (pstate)
{
pstate->ss_refs = 1;
}
return pstate;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nsh_main
****************************************************************************/
int nsh_main(void)
{
FAR struct serial_s *pstate = nsh_allocstruct();
printf("NuttShell (NSH)\n");
fflush(stdout);
for (;;)
{
/* Display the prompt string */
fputs(g_nshprompt, stdout);
fflush(stdout);
/* Get the next line of input */
if (fgets(pstate->ss_line, CONFIG_EXAMPLES_NSH_LINELEN, stdin))
{
/* Parse process the command */
(void)nsh_parse(pstate, pstate->ss_line);
fflush(stdout);
}
}
}
/****************************************************************************
* Name: nsh_output
*
* Description:
* Print a string to stdout.
*
****************************************************************************/
int nsh_output(FAR void *handle, const char *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
ret = vfprintf(stdout, fmt, ap);
va_end(ap);
return ret;
}
/****************************************************************************
* Name: nsh_linebuffer
*
* Description:
* Return a reference to the current line buffer
*
****************************************************************************/
FAR char *nsh_linebuffer(FAR void *handle)
{
FAR struct serial_s *pstate = (FAR struct serial_s *)handle;
return pstate->ss_line;
}
/****************************************************************************
* Name: nsh_clone
*
* Description:
* Make an independent copy of the handle
*
****************************************************************************/
FAR void *nsh_clone(FAR void *handle)
{
return nsh_allocstruct();
}
/****************************************************************************
* Name: nsh_addref
*
* Description:
* Increment the reference count on the handle.
*
****************************************************************************/
void nsh_addref(FAR void *handle)
{
FAR struct serial_s *pstate = (FAR struct serial_s *)handle;
pstate->ss_refs++;
}
/****************************************************************************
* Name: nsh_release
*
* Description:
* Decrement the reference count on the handle, releasing it when the count
* decrements to zero.
*
****************************************************************************/
void nsh_release(FAR void *handle)
{
FAR struct serial_s *pstate = (FAR struct serial_s *)handle;
if (pstate->ss_refs > 1)
{
pstate->ss_refs--;
}
else
{
free(handle);
}
}
/****************************************************************************
* Name: cmd_exit
*
* Description:
* Exit the shell task
*
****************************************************************************/
void cmd_exit(void *handle, int argc, char **argv)
{
exit(0);
}
