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nuttx/examples/nsh/nsh_fscmds.c
patacongo d9080fb256 Debug NSH on z80sim 
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@474 42af7a65-404d-4744-a932-0658087f49c3
2007-12-31 23:52:53 +00:00

737 lines
19 KiB
C
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/****************************************************************************
* examples/nsh/nsh_fscmds.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 NuttX 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>
#if CONFIG_NFILE_DESCRIPTORS > 0
# include <sys/stat.h>
# include <fcntl.h>
#endif
#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0
# ifdef CONFIG_FS_FAT /* Need at least one filesytem in configuration */
# include <sys/mount.h>
# endif
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <dirent.h>
#include <limits.h>
#include <libgen.h>
#include <errno.h>
#include "nsh.h"
/****************************************************************************
* Definitions
****************************************************************************/
#define LSFLAGS_SIZE 1
#define LSFLAGS_LONG 2
#define LSFLAGS_RECURSIVE 4
/* The size of the I/O buffer may be specified in the
* configs/<board-name>defconfig file -- provided that it is at least as
* large as PATH_MAX.
*/
#if CONFIG_NFILE_DESCRIPTORS > 0
# ifdef CONFIG_NSH_IOBUFFERSIZE
# if CONFIG_NSH_IOBUFFERSIZE > (PATH_MAX + 1)
# define IOBUFFERSIZE CONFIG_NSH_IOBUFFERSIZE
# else
# define IOBUFFERSIZE (PATH_MAX + 1)
# endif
# else
# define IOBUFFERSIZE 1024
# endif
# else
# define IOBUFFERSIZE (PATH_MAX + 1)
#endif
/****************************************************************************
* Private Types
****************************************************************************/
typedef int (*direntry_handler_t)(FAR void *, const char *, struct dirent *, void *);
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static char g_iobuffer[IOBUFFERSIZE];
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: trim_dir
****************************************************************************/
static void trim_dir(char *arg)
{
/* Skip any trailing '/' characters (unless it is also the leading '/') */
int len = strlen(arg) - 1;
while (len > 0 && arg[len] == '/')
{
arg[len] = '\0';
len--;
}
}
/****************************************************************************
* Name: getdirpath
****************************************************************************/
static char *getdirpath(const char *path, const char *file)
{
/* Handle the case where all that is left is '/' */
if (strcmp(path, "/") == 0)
{
sprintf(g_iobuffer, "/%s", file);
}
else
{
sprintf(g_iobuffer, "%s/%s", path, file);
}
g_iobuffer[PATH_MAX] = '\0';
return strdup(g_iobuffer);
}
/****************************************************************************
* Name: foreach_direntry
****************************************************************************/
#if CONFIG_NFILE_DESCRIPTORS > 0
static int foreach_direntry(FAR void *handle, const char *cmd, const char *dirpath,
direntry_handler_t handler, void *pvarg)
{
DIR *dirp;
int ret = OK;
/* Trim trailing '/' from directory names */
#ifdef CONFIG_FULL_PATH
trim_dir(arg);
#endif
/* Open the directory */
dirp = opendir(dirpath);
if (!dirp)
{
/* Failed to open the directory */
nsh_output(handle, g_fmtnosuch, cmd, "directory", dirpath);
return ERROR;
}
/* Read each directory entry */
for (;;)
{
struct dirent *entryp = readdir(dirp);
if (!entryp)
{
/* Finished with this directory */
break;
}
/* Call the handler with this directory entry */
if (handler(handle, dirpath, entryp, pvarg) < 0)
{
/* The handler reported a problem */
ret = ERROR;
break;
}
}
closedir(dirp);
return ret;
}
#endif
/****************************************************************************
* Name: ls_handler
****************************************************************************/
#if CONFIG_NFILE_DESCRIPTORS > 0
static int ls_handler(FAR void *handle, const char *dirpath, struct dirent *entryp, void *pvarg)
{
unsigned int lsflags = (unsigned int)pvarg;
int ret;
/* Check if any options will require that we stat the file */
if ((lsflags & (LSFLAGS_SIZE|LSFLAGS_LONG)) != 0)
{
struct stat buf;
char *fullpath = getdirpath(dirpath, entryp->d_name);
/* Yes, stat the file */
ret = stat(fullpath, &buf);
free(fullpath);
if (ret != 0)
{
nsh_output(handle, g_fmtcmdfailed, "ls", "stat", strerror(errno));
return OK;
}
if ((lsflags & LSFLAGS_LONG) != 0)
{
char details[] = "----------";
if (S_ISDIR(buf.st_mode))
{
details[0]='d';
}
else if (S_ISCHR(buf.st_mode))
{
details[0]='c';
}
else if (S_ISBLK(buf.st_mode))
{
details[0]='b';
}
if ((buf.st_mode & S_IRUSR) != 0)
{
details[1]='r';
}
if ((buf.st_mode & S_IWUSR) != 0)
{
details[2]='w';
}
if ((buf.st_mode & S_IXUSR) != 0)
{
details[3]='x';
}
if ((buf.st_mode & S_IRGRP) != 0)
{
details[4]='r';
}
if ((buf.st_mode & S_IWGRP) != 0)
{
details[5]='w';
}
if ((buf.st_mode & S_IXGRP) != 0)
{
details[6]='x';
}
if ((buf.st_mode & S_IROTH) != 0)
{
details[7]='r';
}
if ((buf.st_mode & S_IWOTH) != 0)
{
details[8]='w';
}
if ((buf.st_mode & S_IXOTH) != 0)
{
details[9]='x';
}
nsh_output(handle, " %s", details);
}
if ((lsflags & LSFLAGS_SIZE) != 0)
{
nsh_output(handle, "%8d", buf.st_size);
}
}
/* then provide the filename that is common to normal and verbose output */
#ifdef CONFIG_FULL_PATH
nsh_output(handle, " %s/%s", arg, entryp->d_name);
#else
nsh_output(handle, " %s", entryp->d_name);
#endif
if (DIRENT_ISDIRECTORY(entryp->d_type))
{
nsh_output(handle, "/\n");
}
else
{
nsh_output(handle, "\n");
}
return OK;
}
#endif
/****************************************************************************
* Name: ls_recursive
****************************************************************************/
#if CONFIG_NFILE_DESCRIPTORS > 0
static int ls_recursive(FAR void *handle, const char *dirpath, struct dirent *entryp, void *pvarg)
{
/* Is this entry a directory? */
if (DIRENT_ISDIRECTORY(entryp->d_type))
{
/* Yes.. */
char *newpath;
newpath = getdirpath(dirpath, entryp->d_name);
/* List the directory contents */
nsh_output(handle, "%s:\n", newpath);
foreach_direntry(handle, "ls", newpath, ls_handler, pvarg);
/* Then recurse to list each directory within the directory */
foreach_direntry(handle, "ls", newpath, ls_recursive, pvarg);
free(newpath);
}
return OK;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: cmd_cat
****************************************************************************/
#if CONFIG_NFILE_DESCRIPTORS > 0
void cmd_cat(FAR void *handle, int argc, char **argv)
{
char buffer[1024];
/* Open the file for reading */
int fd = open(argv[1], O_RDONLY);
if (fd < 0)
{
nsh_output(handle, g_fmtcmdfailed, argv[0], "open", strerror(errno));
return;
}
/* And just dump it byte for byte into stdout */
for (;;)
{
int nbytesread = read(fd, buffer, 1024);
/* Check for read errors */
if (nbytesread < 0)
{
/* EINTR is not an error */
if (errno != EINTR)
{
nsh_output(handle, g_fmtcmdfailed, argv[0], "read", strerror(errno));
break;
}
}
/* Check for data successfully read */
else if (nbytesread > 0)
{
int nbyteswritten = 0;
while (nbyteswritten < nbytesread)
{
int n = write(1, buffer, nbytesread);
if (n < 0)
{
/* EINTR is not an error */
if (errno != EINTR)
{
nsh_output(handle, g_fmtcmdfailed, argv[0], "write", strerror(errno));
break;
}
}
else
{
nbyteswritten += n;
}
}
}
/* Otherwise, it is the end of file */
else
{
break;
}
}
(void)close(fd);
}
#endif
/****************************************************************************
* Name: cmd_cp
****************************************************************************/
#if CONFIG_NFILE_DESCRIPTORS > 0
void cmd_cp(FAR void *handle, int argc, char **argv)
{
struct stat buf;
char *fullpath = NULL;
const char *wrpath = argv[2];
int oflags = O_WRONLY|O_CREAT|O_TRUNC;
int rdfd;
int wrfd;
int ret;
/* Open the source file for reading */
rdfd = open(argv[1], O_RDONLY);
if (rdfd < 0)
{
nsh_output(handle, g_fmtcmdfailed, argv[0], "open", strerror(errno));
return;
}
/* Check if the destination is a directory */
ret = stat(wrpath, &buf);
if (ret == 0)
{
/* Something exists here... is it a directory? */
if (S_ISDIR(buf.st_mode))
{
/* Yes, it is a directory. Remove any trailing '/' characters from the path */
trim_dir(argv[2]);
/* Construct the full path to the new file */
fullpath = getdirpath(argv[2], basename(argv[1]) );
if (!fullpath)
{
nsh_output(handle, g_fmtcmdoutofmemory, argv[0]);
goto out_with_rdfd;
}
/* Open then fullpath for writing */
wrpath = fullpath;
}
else if (!S_ISREG(buf.st_mode))
{
/* Maybe it is a driver? */
oflags = O_WRONLY;
}
}
/* Now open the destination */
wrfd = open(wrpath, oflags, 0666);
if (wrfd < 0)
{
nsh_output(handle, g_fmtcmdfailed, argv[0], "open", strerror(errno));
goto out_with_fullpath;
}
/* Now copy the file */
for (;;)
{
int nbytesread;
int nbyteswritten;
do
{
nbytesread = read(rdfd, g_iobuffer, IOBUFFERSIZE);
if (nbytesread == 0)
{
/* End of file */
goto out_with_wrfd;
}
else if (nbytesread < 0 && errno != EINTR)
{
/* Read error */
nsh_output(handle, g_fmtcmdfailed, argv[0], "read", strerror(errno));
goto out_with_wrfd;
}
}
while (nbytesread <= 0);
do
{
nbyteswritten = write(wrfd, g_iobuffer, nbytesread);
if (nbyteswritten >= 0)
{
nbytesread -= nbyteswritten;
}
else if (errno != EINTR)
{
/* Read error */
nsh_output(handle, g_fmtcmdfailed, argv[0], "write", strerror(errno));
goto out_with_wrfd;
}
}
while (nbytesread > 0);
}
out_with_wrfd:
close(wrfd);
out_with_fullpath:
if (fullpath)
{
free(fullpath);
}
out_with_rdfd:
close(rdfd);
}
#endif
/****************************************************************************
* Name: cmd_ls
****************************************************************************/
#if CONFIG_NFILE_DESCRIPTORS > 0
void cmd_ls(FAR void *handle, int argc, char **argv)
{
unsigned int lsflags = 0;
int ret;
/* Get the ls options */
int option;
while ((option = getopt(argc, argv, "lRs")) != ERROR)
{
switch (option)
{
case 'l':
lsflags |= (LSFLAGS_SIZE|LSFLAGS_LONG);
break;
case 'R':
lsflags |= LSFLAGS_RECURSIVE;
break;
case 's':
lsflags |= LSFLAGS_SIZE;
break;
case '?':
default:
nsh_output(handle, g_fmtarginvalid, argv[0]);
return;
}
}
/* There are one required arguments after the options */
if (optind + 1 < argc)
{
nsh_output(handle, g_fmttoomanyargs, argv[0]);
return;
}
else if (optind + 1 > argc)
{
nsh_output(handle, g_fmtargrequired, argv[0]);
return;
}
/* List the directory contents */
nsh_output(handle, "%s:\n", argv[optind]);
ret = foreach_direntry(handle, "ls", argv[optind], ls_handler, (void*)lsflags);
if (ret == OK && (lsflags & LSFLAGS_RECURSIVE) != 0)
{
/* Then recurse to list each directory within the directory */
ret = foreach_direntry(handle, "ls", argv[optind], ls_recursive, (void*)lsflags);
}
}
#endif
/****************************************************************************
* Name: cmd_mkdir
****************************************************************************/
#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0
void cmd_mkdir(FAR void *handle, int argc, char **argv)
{
int result = mkdir(argv[1], 0777);
if ( result < 0)
{
nsh_output(handle, g_fmtcmdfailed, argv[0], "mkdir", strerror(errno));
}
}
#endif
/****************************************************************************
* Name: cmd_mount
****************************************************************************/
#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0
#ifdef CONFIG_FS_FAT /* Need at least one filesytem in configuration */
void cmd_mount(FAR void *handle, int argc, char **argv)
{
char *filesystem = 0;
int result;
/* Get the mount options */
int option;
while ((option = getopt(argc, argv, ":t:")) != ERROR)
{
switch (option)
{
case 't':
filesystem = optarg;
break;
case ':':
nsh_output(handle, g_fmtargrequired, argv[0]);
return;
case '?':
default:
nsh_output(handle, g_fmtarginvalid, argv[0]);
return;
}
}
/* There are two required arguments after the options */
if (optind + 2 < argc)
{
nsh_output(handle, g_fmttoomanyargs, argv[0]);
return;
}
else if (optind + 2 > argc)
{
nsh_output(handle, g_fmtargrequired, argv[0]);
return;
}
/* Perform the mount */
result = mount(argv[optind], argv[optind+1], filesystem, 0, NULL);
if ( result < 0)
{
nsh_output(handle, g_fmtcmdfailed, argv[0], "mount", strerror(errno));
}
}
#endif
#endif
/****************************************************************************
* Name: cmd_rm
****************************************************************************/
#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0
void cmd_rm(FAR void *handle, int argc, char **argv)
{
if (unlink(argv[1]) < 0)
{
nsh_output(handle, g_fmtcmdfailed, argv[0], "unlink", strerror(errno));
}
}
#endif
/****************************************************************************
* Name: cmd_rm
****************************************************************************/
#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0
void cmd_rmdir(FAR void *handle, int argc, char **argv)
{
if (rmdir(argv[1]) < 0)
{
nsh_output(handle, g_fmtcmdfailed, argv[0], "rmdir", strerror(errno));
}
}
#endif
/****************************************************************************
* Name: cmd_umount
****************************************************************************/
#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0
#ifdef CONFIG_FS_FAT /* Need at least one filesytem in configuration */
void cmd_umount(FAR void *handle, int argc, char **argv)
{
/* Perform the umount */
int result = umount(argv[1]);
if ( result < 0)
{
nsh_output(handle, g_fmtcmdfailed, argv[0], "umount", strerror(errno));
}
}
#endif
#endif
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