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nshlib: Now that NuttX automatically converts block to character devices, the implemention of the DD command no longer has to muck with block to character conversion

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This commit is contained in:
Gregory Nutt 2015-11-21 11:57:41 -06:00
parent cbe1b3a415
commit 146f126ead
4 changed files with 24 additions and 296 deletions
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3
ChangeLog.txt
View File

@ -1445,4 +1445,7 @@
From Alan Carvalho de Assis (2015-10-13).
* apps/examples/media: Add a simple test for access of media via
a block driver or MTD driver (2015-11-09).
* apps/nshlib/nsh_ddcmd.c: Now that NuttX automatically converts
block devices to character devices, all of the BCH stuff in NSH
can be removed (2015-11-21).

2
nshlib/nsh.h
View File

@ -598,8 +598,6 @@
# define CONFIG_NSH_DISABLE_PS 1
# undef CONFIG_NSH_DISABLE_DF /* 'df' depends on foreach_mountpoint */
# define CONFIG_NSH_DISABLE_DF 1
# undef CONFIG_NSH_DISABLE_DD /* 'dd' depends on bchlib_* interfaces */
# define CONFIG_NSH_DISABLE_DD 1
# undef CONFIG_NSH_DISABLE_LOSETUP /* 'losetup' depends on losetup/loteardown */
# define CONFIG_NSH_DISABLE_LOSETUP 1
# undef CONFIG_NSH_DISABLE_MKFATFS /* 'mkfatfs' depends on mkfatfs interface */

2
nshlib/nsh_dbgcmds.c
View File

@ -1,7 +1,7 @@
/****************************************************************************
* apps/nshlib/dbg_dbgcmds.c
*
* Copyright (C) 2008-2009, 2011-2012 Gregory Nutt. All rights reserved.
* Copyright (C) 2008-2009, 2011-2012, 2015 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without

313
nshlib/nsh_ddcmd.c
View File

@ -1,7 +1,7 @@
/****************************************************************************
* apps/nshlib/nsh_ddcmd.c
*
* Copyright (C) 2008-2009, 2012 Gregory Nutt. All rights reserved.
* Copyright (C) 2008-2009, 2012, 2015 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
@ -51,8 +51,6 @@
#include <debug.h>
#include <errno.h>
#include <nuttx/fs/fs.h>
#include "nsh.h"
#include "nsh_console.h"
@ -74,30 +72,6 @@
#undef CAN_PIPE_FROM_STD
/* Function pointer calls are only need if block drivers are supported
* (or, rather, if mount points are supported in the file system)
*/
#ifndef CONFIG_DISABLE_MOUNTPOINT
# define DD_INFD ((dd)->inf.fd)
# define DD_INHANDLE ((dd)->inf.handle)
# define DD_OUTFD ((dd)->outf.fd)
# define DD_OUTHANDLE ((dd)->outf.handle)
# define DD_READ(dd) ((dd)->infread(dd))
# define DD_WRITE(dd) ((dd)->outfwrite(dd))
# define DD_INCLOSE(dd) ((dd)->infclose(dd))
# define DD_OUTCLOSE(dd) ((dd)->outfclose(dd))
#else
# define DD_INFD ((dd)->infd)
# undef DD_INHANDLE
# define DD_OUTFD ((dd)->outfd)
# undef DD_OUTHANDLE
# define DD_READ(dd) dd_readch(dd)
# define DD_WRITE(dd) dd_writech(dd)
# define DD_INCLOSE(dd) dd_infclosech(dd)
# define DD_OUTCLOSE(dd) dd_outfclosech(dd)
#endif
/****************************************************************************
* Private Types
****************************************************************************/
@ -106,26 +80,8 @@ struct dd_s
{
FAR struct nsh_vtbl_s *vtbl;
#ifndef CONFIG_DISABLE_MOUNTPOINT
union
{
FAR void *handle; /* BCH lib handle for block device */
int fd; /* File descriptor of the character device */
} inf;
#else
int infd; /* File descriptor of the input device */
#endif
#ifndef CONFIG_DISABLE_MOUNTPOINT
union
{
FAR void *handle; /* BCH lib handle for block device */
int fd; /* File descriptor of the character device */
} outf;
#else
int outfd; /* File descriptor of the output device */
#endif
int infd; /* File descriptor of the input device */
int outfd; /* File descriptor of the output device */
uint32_t nsectors; /* Number of sectors to transfer */
uint32_t sector; /* The current sector number */
uint32_t skip; /* The number of sectors skipped on input */
@ -133,15 +89,6 @@ struct dd_s
uint16_t sectsize; /* Size of one sector */
uint16_t nbytes; /* Number of valid bytes in the buffer */
uint8_t *buffer; /* Buffer of data to write to the output file */
/* Function pointers to handle differences between block and character devices */
#ifndef CONFIG_DISABLE_MOUNTPOINT
int (*infread)(struct dd_s *dd);
void (*infclose)(struct dd_s *dd);
int (*outfwrite)(struct dd_s *dd);
void (*outfclose)(struct dd_s *dd);
#endif
};
/****************************************************************************
@ -163,85 +110,10 @@ static const char g_dd[] = "dd";
****************************************************************************/
/****************************************************************************
* Name: dd_outfcloseblk
* Name: dd_write
****************************************************************************/
#ifndef CONFIG_DISABLE_MOUNTPOINT
static void dd_outfcloseblk(struct dd_s *dd)
{
(void)bchlib_teardown(DD_OUTHANDLE);
}
#endif
/****************************************************************************
* Name: dd_outfclosech
****************************************************************************/
static void dd_outfclosech(struct dd_s *dd)
{
(void)close(DD_OUTFD);
}
/****************************************************************************
* Name: dd_infcloseblk
****************************************************************************/
#ifndef CONFIG_DISABLE_MOUNTPOINT
static void dd_infcloseblk(struct dd_s *dd)
{
(void)bchlib_teardown(DD_INHANDLE);
}
#endif
/****************************************************************************
* Name: dd_infclosech
****************************************************************************/
static void dd_infclosech(struct dd_s *dd)
{
(void)close(DD_INFD);
}
/****************************************************************************
* Name: dd_writeblk
****************************************************************************/
#ifndef CONFIG_DISABLE_MOUNTPOINT
static int dd_writeblk(struct dd_s *dd)
{
ssize_t nbytes;
off_t offset = (dd->sector - dd->skip) * dd->sectsize;
/* Write the sector at the specified offset */
nbytes = bchlib_write(DD_OUTHANDLE, (char*)dd->buffer, offset, dd->sectsize);
if (nbytes < 0)
{
/* bchlib_write return -EFBIG on attempts to write past the end of
* the device.
*/
if (nbytes == -EFBIG)
{
dd->eof = true; /* Set end-of-file */
}
else
{
FAR struct nsh_vtbl_s *vtbl = dd->vtbl;
nsh_output(vtbl, g_fmtcmdfailed, g_dd, "bshlib_write", NSH_ERRNO_OF(-nbytes));
return ERROR;
}
}
return OK;
}
#endif
/****************************************************************************
* Name: dd_writech
****************************************************************************/
static int dd_writech(struct dd_s *dd)
static int dd_write(struct dd_s *dd)
{
uint8_t *buffer = dd->buffer;
uint16_t written ;
@ -252,7 +124,7 @@ static int dd_writech(struct dd_s *dd)
written = 0;
do
{
nbytes = write(DD_OUTFD, buffer, dd->sectsize - written);
nbytes = write(dd->outfd, buffer, dd->sectsize - written);
if (nbytes < 0)
{
FAR struct nsh_vtbl_s *vtbl = dd->vtbl;
@ -269,36 +141,10 @@ static int dd_writech(struct dd_s *dd)
}
/****************************************************************************
* Name: dd_readblk
* Name: dd_read
****************************************************************************/
#ifndef CONFIG_DISABLE_MOUNTPOINT
static int dd_readblk(struct dd_s *dd)
{
ssize_t nbytes;
off_t offset = dd->sector * dd->sectsize;
nbytes = bchlib_read(DD_INHANDLE, (char*)dd->buffer, offset, dd->sectsize);
if (nbytes < 0)
{
FAR struct nsh_vtbl_s *vtbl = dd->vtbl;
nsh_output(vtbl, g_fmtcmdfailed, g_dd, "bshlib_read", NSH_ERRNO_OF(-nbytes));
return ERROR;
}
/* bchlib_read return 0 on attempts to write past the end of the device. */
dd->nbytes = nbytes;
dd->eof = (nbytes == 0);
return OK;
}
#endif
/****************************************************************************
* Name: dd_readch
****************************************************************************/
static int dd_readch(struct dd_s *dd)
static int dd_read(struct dd_s *dd)
{
uint8_t *buffer = dd->buffer;
ssize_t nbytes;
@ -306,7 +152,7 @@ static int dd_readch(struct dd_s *dd)
dd->nbytes = 0;
do
{
nbytes = read(DD_INFD, buffer, dd->sectsize - dd->nbytes);
nbytes = read(dd->infd, buffer, dd->sectsize - dd->nbytes);
if (nbytes < 0)
{
FAR struct nsh_vtbl_s *vtbl = dd->vtbl;
@ -323,81 +169,14 @@ static int dd_readch(struct dd_s *dd)
return OK;
}
/****************************************************************************
* Name: dd_filetype
****************************************************************************/
#ifndef CONFIG_DISABLE_MOUNTPOINT
static int dd_filetype(const char *filename)
{
struct stat sb;
int ret;
/* Get the type of the file */
ret = stat(filename, &sb);
if (ret < 0)
{
return ERROR; /* Return -1 on failure */
}
return S_ISBLK(sb.st_mode); /* Return true(1) if block, false(0) if char */
}
#endif
/****************************************************************************
* Name: dd_infopen
****************************************************************************/
#ifndef CONFIG_DISABLE_MOUNTPOINT
static inline int dd_infopen(const char *name, struct dd_s *dd)
{
FAR struct nsh_vtbl_s *vtbl = dd->vtbl;
int ret;
int type;
/* Get the type of the input file */
type = dd_filetype(name);
if (type < 0)
{
nsh_output(vtbl, g_fmtcmdfailed, g_dd, "stat", NSH_ERRNO_OF(-type));
return type;
}
/* Open the input file */
if (!type)
{
DD_INFD = open(name, O_RDONLY);
if (DD_INFD < 0)
{
nsh_output(vtbl, g_fmtcmdfailed, g_dd, "open", NSH_ERRNO);
return ERROR;
}
dd->infread = dd_readch; /* Character oriented read */
dd->infclose = dd_infclosech;
}
else
{
ret = bchlib_setup(name, true, &DD_INHANDLE);
if (ret < 0)
{
return ERROR;
}
dd->infread = dd_readblk;
dd->infclose = dd_infcloseblk;
}
return OK;
}
#else
static inline int dd_infopen(const char *name, struct dd_s *dd)
{
DD_INFD = open(name, O_RDONLY);
if (DD_INFD < 0)
dd->infd = open(name, O_RDONLY);
if (dd->infd < 0)
{
FAR struct nsh_vtbl_s *vtbl = dd->vtbl;
nsh_output(vtbl, g_fmtcmdfailed, g_dd, "open", NSH_ERRNO);
@ -406,59 +185,15 @@ static inline int dd_infopen(const char *name, struct dd_s *dd)
return OK;
}
#endif
/****************************************************************************
* Name: dd_outfopen
****************************************************************************/
#ifndef CONFIG_DISABLE_MOUNTPOINT
static inline int dd_outfopen(const char *name, struct dd_s *dd)
{
int type;
int ret = OK;
/* Get the type of the output file */
type = dd_filetype(name);
/* Open the block driver for input */
if (type == true)
{
ret = bchlib_setup(name, true, &DD_OUTHANDLE);
if (ret < 0)
{
return ERROR;
}
dd->outfwrite = dd_writeblk; /* Block oriented write */
dd->outfclose = dd_outfcloseblk;
}
/* Otherwise, the file is character oriented or does not exist */
else
{
DD_OUTFD = open(name, O_WRONLY|O_CREAT|O_TRUNC, 0644);
if (DD_OUTFD < 0)
{
FAR struct nsh_vtbl_s *vtbl = dd->vtbl;
nsh_output(vtbl, g_fmtcmdfailed, g_dd, "open", NSH_ERRNO);
return ERROR;
}
dd->outfwrite = dd_writech; /* Character oriented write */
dd->outfclose = dd_outfclosech;
}
return OK;
}
#else
static inline int dd_outfopen(const char *name, struct dd_s *dd)
{
DD_OUTFD = open(name, O_WRONLY|O_CREAT|O_TRUNC, 0644);
if (DD_OUTFD < 0)
dd->outfd = open(name, O_WRONLY|O_CREAT|O_TRUNC, 0644);
if (dd->outfd < 0)
{
nsh_output(dd->vtbl, g_fmtcmdfailed, g_dd, "open", NSH_ERRNO);
return ERROR;
@ -466,7 +201,6 @@ static inline int dd_outfopen(const char *name, struct dd_s *dd)
return OK;
}
#endif
/****************************************************************************
* Public Functions
@ -496,22 +230,15 @@ int cmd_dd(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
*/
#ifdef CAN_PIPE_FROM_STD
DD_INFD = 0; /* stdin */
#ifndef CONFIG_NSH_DISABLE_DD
dd.infread = readch; /* Character oriented read */
dd.infclose = noclose; /* Don't close stdin */
#endif
dd->infd = 0; /* stdin */
#endif
/* If no OF= option is provided on the command line, then write
* to stdout.
*/
#ifdef CAN_PIPE_FROM_STD
DD_OUTDF = 1; /* stdout */
#ifndef CONFIG_NSH_DISABLE_DD
dd.outfwrite = writech; /* Character oriented write */
dd.outfclose = noclose; /* Don't close stdout */
#endif
dd->outfd = 1; /* stdout */
#endif
/* Parse command line parameters */
@ -580,7 +307,7 @@ int cmd_dd(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
{
/* Read one sector from from the input */
ret = DD_READ(&dd);
ret = dd_read(&dd);
if (ret < 0)
{
goto errout_with_outf;
@ -601,7 +328,7 @@ int cmd_dd(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
if (dd.sector >= dd.skip)
{
ret = DD_WRITE(&dd);
ret = dd_write(&dd);
if (ret < 0)
{
goto errout_with_outf;
@ -621,10 +348,10 @@ int cmd_dd(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
ret = OK;
errout_with_outf:
DD_OUTCLOSE(&dd);
(void)close(dd.outfd);
errout_with_inf:
DD_INCLOSE(&dd);
(void)close(dd.infd);
free(dd.buffer);
errout_with_paths: