367 lines
11 KiB
C
367 lines
11 KiB
C
/****************************************************************************
|
|
* examples/nsh/nsh_serial.c
|
|
*
|
|
* Copyright (C) 2007, 2008 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 <unistd.h>
|
|
#include <string.h>
|
|
#include <stdarg.h>
|
|
|
|
#include "nsh.h"
|
|
|
|
/****************************************************************************
|
|
* Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Types
|
|
****************************************************************************/
|
|
|
|
struct serial_s
|
|
{
|
|
struct nsh_vtbl_s ss_vtbl;
|
|
int ss_fd; /* Re-direct file descriptor */
|
|
FILE *ss_stream; /* Re-direct stream */
|
|
char ss_line[CONFIG_EXAMPLES_NSH_LINELEN];
|
|
};
|
|
|
|
struct serialsave_s
|
|
{
|
|
int ss_fd; /* Re-direct file descriptor */
|
|
FILE *ss_stream; /* Re-direct stream */
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Private Function Prototypes
|
|
****************************************************************************/
|
|
|
|
#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
|
|
static FAR struct nsh_vtbl_s *nsh_consoleclone(FAR struct nsh_vtbl_s *vtbl);
|
|
static void nsh_consolerelease(FAR struct nsh_vtbl_s *vtbl);
|
|
#endif
|
|
static int nsh_consoleoutput(FAR struct nsh_vtbl_s *vtbl, const char *fmt, ...);
|
|
static FAR char *nsh_consolelinebuffer(FAR struct nsh_vtbl_s *vtbl);
|
|
static void nsh_consoleredirect(FAR struct nsh_vtbl_s *vtbl, int fd, FAR ubyte *save);
|
|
static void nsh_consoleundirect(FAR struct nsh_vtbl_s *vtbl, FAR ubyte *save);
|
|
static void nsh_consoleexit(FAR struct nsh_vtbl_s *vtbl);
|
|
|
|
/****************************************************************************
|
|
* 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 *)zalloc(sizeof(struct serial_s));
|
|
if (pstate)
|
|
{
|
|
#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
|
|
pstate->ss_vtbl.clone = nsh_consoleclone;
|
|
pstate->ss_vtbl.release = nsh_consolerelease;
|
|
#endif
|
|
pstate->ss_vtbl.output = nsh_consoleoutput;
|
|
pstate->ss_vtbl.linebuffer = nsh_consolelinebuffer;
|
|
pstate->ss_vtbl.redirect = nsh_consoleredirect;
|
|
pstate->ss_vtbl.undirect = nsh_consoleundirect;
|
|
pstate->ss_vtbl.exit = nsh_consoleexit;
|
|
|
|
pstate->ss_fd = 1;
|
|
pstate->ss_stream = stdout;
|
|
}
|
|
return pstate;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: nsh_openifnotopen
|
|
****************************************************************************/
|
|
|
|
static int nsh_openifnotopen(struct serial_s *pstate)
|
|
{
|
|
/* The stream is open in a lazy fashion. This is done because the file
|
|
* descriptor may be opened on a different task than the stream.
|
|
*/
|
|
|
|
if (!pstate->ss_stream)
|
|
{
|
|
pstate->ss_stream = fdopen(pstate->ss_fd, "w");
|
|
if (!pstate->ss_stream)
|
|
{
|
|
return ERROR;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: nsh_closeifnotclosed
|
|
****************************************************************************/
|
|
|
|
static void nsh_closeifnotclosed(struct serial_s *pstate)
|
|
{
|
|
if (pstate->ss_stream == stdout)
|
|
{
|
|
fflush(stdout);
|
|
pstate->ss_fd = 1;
|
|
}
|
|
else
|
|
{
|
|
if (pstate->ss_stream)
|
|
{
|
|
fflush(pstate->ss_stream);
|
|
fclose(pstate->ss_stream);
|
|
}
|
|
else if (pstate->ss_fd >= 0 && pstate->ss_fd != 1)
|
|
{
|
|
close(pstate->ss_fd);
|
|
}
|
|
|
|
pstate->ss_fd = -1;
|
|
pstate->ss_stream = NULL;
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: nsh_consoleoutput
|
|
*
|
|
* Description:
|
|
* Print a string to the currently selected stream.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int nsh_consoleoutput(FAR struct nsh_vtbl_s *vtbl, const char *fmt, ...)
|
|
{
|
|
FAR struct serial_s *pstate = (FAR struct serial_s *)vtbl;
|
|
va_list ap;
|
|
int ret;
|
|
|
|
/* The stream is open in a lazy fashion. This is done because the file
|
|
* descriptor may be opened on a different task than the stream. The
|
|
* actual open will then occur with the first output from the new task.
|
|
*/
|
|
|
|
if (nsh_openifnotopen(pstate) != 0)
|
|
{
|
|
return ERROR;
|
|
}
|
|
|
|
va_start(ap, fmt);
|
|
ret = vfprintf(pstate->ss_stream, fmt, ap);
|
|
va_end(ap);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: nsh_consolelinebuffer
|
|
*
|
|
* Description:
|
|
* Return a reference to the current line buffer
|
|
*
|
|
****************************************************************************/
|
|
|
|
static FAR char *nsh_consolelinebuffer(FAR struct nsh_vtbl_s *vtbl)
|
|
{
|
|
FAR struct serial_s *pstate = (FAR struct serial_s *)vtbl;
|
|
return pstate->ss_line;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: nsh_consoleclone
|
|
*
|
|
* Description:
|
|
* Make an independent copy of the vtbl
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
|
|
static FAR struct nsh_vtbl_s *nsh_consoleclone(FAR struct nsh_vtbl_s *vtbl)
|
|
{
|
|
FAR struct serial_s *pstate = (FAR struct serial_s *)vtbl;
|
|
FAR struct serial_s *pclone = nsh_allocstruct();
|
|
|
|
if (pclone->ss_fd == 1)
|
|
{
|
|
pclone->ss_fd = 1;
|
|
pclone->ss_stream = stdout;
|
|
}
|
|
else
|
|
{
|
|
pclone->ss_fd = pstate->ss_fd;
|
|
pclone->ss_stream = NULL;
|
|
}
|
|
return &pclone->ss_vtbl;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: nsh_consolerelease
|
|
*
|
|
* Description:
|
|
* Release the cloned instance
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
|
|
static void nsh_consolerelease(FAR struct nsh_vtbl_s *vtbl)
|
|
{
|
|
FAR struct serial_s *pstate = (FAR struct serial_s *)vtbl;
|
|
|
|
nsh_closeifnotclosed(pstate);
|
|
free(vtbl);
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: nsh_consoleredirect
|
|
*
|
|
* Description:
|
|
* Set up for redirected output
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void nsh_consoleredirect(FAR struct nsh_vtbl_s *vtbl, int fd, FAR ubyte *save)
|
|
{
|
|
FAR struct serial_s *pstate = (FAR struct serial_s *)vtbl;
|
|
FAR struct serialsave_s *ssave = (FAR struct serialsave_s *)save;
|
|
|
|
(void)nsh_openifnotopen(pstate);
|
|
fflush(pstate->ss_stream);
|
|
if (ssave)
|
|
{
|
|
ssave->ss_fd = pstate->ss_fd;
|
|
ssave->ss_stream = pstate->ss_stream;
|
|
}
|
|
else
|
|
{
|
|
fclose(pstate->ss_stream);
|
|
}
|
|
|
|
pstate->ss_fd = fd;
|
|
pstate->ss_stream = NULL;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: nsh_consoleundirect
|
|
*
|
|
* Description:
|
|
* Set up for redirected output
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void nsh_consoleundirect(FAR struct nsh_vtbl_s *vtbl, FAR ubyte *save)
|
|
{
|
|
FAR struct serial_s *pstate = (FAR struct serial_s *)vtbl;
|
|
FAR struct serialsave_s *ssave = (FAR struct serialsave_s *)save;
|
|
|
|
nsh_closeifnotclosed(pstate);
|
|
pstate->ss_fd = ssave->ss_fd;
|
|
pstate->ss_stream = ssave->ss_stream;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: nsh_consoleexit
|
|
*
|
|
* Description:
|
|
* Exit the shell task
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void nsh_consoleexit(FAR struct nsh_vtbl_s *vtbl)
|
|
{
|
|
exit(0);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: nsh_main
|
|
****************************************************************************/
|
|
|
|
int nsh_consolemain(int argc, char *argv[])
|
|
{
|
|
FAR struct serial_s *pstate = nsh_allocstruct();
|
|
|
|
/* Present a greeting */
|
|
|
|
printf(g_nshgreeting);
|
|
fflush(pstate->ss_stream);
|
|
|
|
/* Execute the startup script */
|
|
|
|
#ifdef CONFIG_EXAMPLES_NSH_ROMFSETC
|
|
(void)nsh_script(&pstate->ss_vtbl, "init", NSH_INITPATH);
|
|
#endif
|
|
|
|
/* Then enter the command line parsing loop */
|
|
|
|
for (;;)
|
|
{
|
|
/* Display the prompt string */
|
|
|
|
fputs(g_nshprompt, pstate->ss_stream);
|
|
fflush(pstate->ss_stream);
|
|
|
|
/* Get the next line of input */
|
|
|
|
if (fgets(pstate->ss_line, CONFIG_EXAMPLES_NSH_LINELEN, stdin))
|
|
{
|
|
/* Parse process the command */
|
|
|
|
(void)nsh_parse(&pstate->ss_vtbl, pstate->ss_line);
|
|
fflush(pstate->ss_stream);
|
|
}
|
|
}
|
|
}
|