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nuttx-apps/nshlib/nsh_fscmds.c
chao an ec63217b48 nshlib: disable nsh error print if NSH_DISABLE_ERROR_PRINT enabled 
text	   data	    bss	    dec	    hex	filename
 398953	  27088	   4128	 430169	  69059	nuttx    /* before */
 389241	  27072	   4128	 420441	  66a59	nuttx    /* after  */
  -9712     -16

Signed-off-by: chao an <anchao@xiaomi.com>
2023-06-12 13:37:27 +08:00

2214 lines
50 KiB
C
Raw Blame History

/****************************************************************************
* apps/nshlib/nsh_fscmds.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <inttypes.h>
#include <stdint.h>
#include <stdbool.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <dirent.h>
#include <limits.h>
#include <libgen.h>
#include <errno.h>
#include <debug.h>
#if !defined(CONFIG_DISABLE_MOUNTPOINT)
# include <sys/mount.h>
# include <sys/boardctl.h>
# include <nuttx/drivers/ramdisk.h>
# ifdef CONFIG_DEV_LOOP
# include <sys/ioctl.h>
# include <nuttx/fs/loop.h>
# endif
# ifdef CONFIG_FS_SMARTFS
# include "fsutils/mksmartfs.h"
# endif
# ifdef CONFIG_SMART_DEV_LOOP
# include <sys/ioctl.h>
# include <nuttx/fs/smart.h>
# endif
# ifdef CONFIG_MTD_LOOP
# include <nuttx/fs/loopmtd.h>
# endif
# ifdef CONFIG_NFS
# include <sys/socket.h>
# include <netinet/in.h>
# include <nuttx/fs/nfs.h>
# endif
# ifdef CONFIG_RAMLOG_SYSLOG
# include <nuttx/syslog/ramlog.h>
# endif
#endif
#ifdef CONFIG_FSUTILS_MKFATFS
# include "fsutils/mkfatfs.h"
#endif
#include "nsh.h"
#include "nsh_console.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define LSFLAGS_SIZE 1
#define LSFLAGS_LONG 2
#define LSFLAGS_RECURSIVE 4
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: ls_specialdir
****************************************************************************/
#if !defined(CONFIG_NSH_DISABLE_LS)
static inline int ls_specialdir(FAR const char *dir)
{
/* '.' and '..' directories are not listed like normal directories */
return (strcmp(dir, ".") == 0 || strcmp(dir, "..") == 0);
}
#endif
/****************************************************************************
* Name: ls_handler
****************************************************************************/
#if !defined(CONFIG_NSH_DISABLE_LS)
static int ls_handler(FAR struct nsh_vtbl_s *vtbl, FAR const char *dirpath,
FAR struct dirent *entryp, FAR void *pvarg)
{
unsigned int lsflags = (unsigned int)((uintptr_t)pvarg);
#ifdef CONFIG_PSEUDOFS_SOFTLINKS
bool isdir = false;
#endif
int ret;
/* Check if any options will require that we stat the file */
if ((lsflags & (LSFLAGS_SIZE | LSFLAGS_LONG)) != 0)
{
struct stat buf;
/* stat the file */
if (entryp != NULL)
{
FAR char *fullpath = nsh_getdirpath(vtbl, dirpath, entryp->d_name);
ret = stat(fullpath, &buf);
free(fullpath);
}
else
{
/* NULL entry signifies that we are running ls on a single file */
ret = stat(dirpath, &buf);
}
if (ret != 0)
{
nsh_error(vtbl, g_fmtcmdfailed, "ls", "stat", NSH_ERRNO);
return ERROR;
}
if ((lsflags & LSFLAGS_LONG) != 0)
{
char details[] = "----------";
#ifdef CONFIG_PSEUDOFS_SOFTLINKS
if (S_ISLNK(buf.st_mode))
{
details[0] = 'l'; /* Takes precedence over type of the target */
isdir = S_ISDIR(buf.st_mode);
}
else
#endif
if (S_ISBLK(buf.st_mode))
{
details[0] = 'b';
}
else if (S_ISCHR(buf.st_mode))
{
details[0] = 'c';
}
else if (S_ISDIR(buf.st_mode))
{
details[0] = 'd';
}
#ifdef CONFIG_MTD
else if (S_ISMTD(buf.st_mode))
{
details[0] = 'f';
}
#endif
#ifdef CONFIG_FS_SHM
else if (S_ISSHM(buf.st_mode))
{
details[0] = 'h';
}
#endif
#ifndef CONFIG_DISABLE_MQUEUE
else if (S_ISMQ(buf.st_mode))
{
details[0] = 'm';
}
#endif
#ifdef CONFIG_NET
else if (S_ISSOCK(buf.st_mode))
{
details[0] = 'n';
}
#endif
#ifdef CONFIG_FS_NAMED_SEMAPHORES
else if (S_ISSEM(buf.st_mode))
{
details[0] = 's';
}
#endif
else if (!S_ISREG(buf.st_mode))
{
details[0] = '?';
}
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(vtbl, " %s", details);
}
if ((lsflags & LSFLAGS_SIZE) != 0)
{
nsh_output(vtbl, "%8" PRIdOFF, buf.st_size);
}
}
/* Then provide the filename that is common to normal and verbose output */
if (entryp != NULL)
{
nsh_output(vtbl, " %s", entryp->d_name);
#ifdef CONFIG_PSEUDOFS_SOFTLINKS
if (DIRENT_ISLINK(entryp->d_type))
{
FAR char *fullpath;
ssize_t len;
/* Get the target of the symbolic link */
fullpath = nsh_getdirpath(vtbl, dirpath, entryp->d_name);
len = readlink(fullpath, vtbl->iobuffer, IOBUFFERSIZE);
free(fullpath);
if (len < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, "ls", "readlink", NSH_ERRNO);
return ERROR;
}
if (isdir)
{
nsh_output(vtbl, "/ ->%s\n", vtbl->iobuffer);
}
else
{
nsh_output(vtbl, " ->%s\n", vtbl->iobuffer);
}
}
else
#endif
if (DIRENT_ISDIRECTORY(entryp->d_type) &&
!ls_specialdir(entryp->d_name))
{
nsh_output(vtbl, "/\n");
}
else
{
nsh_output(vtbl, "\n");
}
}
else
{
/* A single file */
nsh_output(vtbl, " %s\n", dirpath);
}
return OK;
}
#endif
/****************************************************************************
* Name: ls_recursive
****************************************************************************/
#if !defined(CONFIG_NSH_DISABLE_LS)
static int ls_recursive(FAR struct nsh_vtbl_s *vtbl, FAR const char *dirpath,
FAR struct dirent *entryp, FAR void *pvarg)
{
int ret = OK;
/* Is this entry a directory (not a special directories, e.g. . and ..)? */
if (DIRENT_ISDIRECTORY(entryp->d_type) && !ls_specialdir(entryp->d_name))
{
/* Yes.. */
FAR char *newpath;
newpath = nsh_getdirpath(vtbl, dirpath, entryp->d_name);
/* List the directory contents */
nsh_output(vtbl, "%s:\n", newpath);
/* Traverse the directory */
ret = nsh_foreach_direntry(vtbl, "ls", newpath, ls_handler, pvarg);
if (ret == 0)
{
/* Then recurse to list each directory within the directory */
ret = nsh_foreach_direntry(vtbl, "ls", newpath, ls_recursive,
pvarg);
}
free(newpath);
}
return ret;
}
#endif /* !CONFIG_NSH_DISABLE_LS */
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: cmd_basename
****************************************************************************/
#ifndef CONFIG_NSH_DISABLE_BASENAME
int cmd_basename(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
FAR char *filename;
/* Usage: basename <path> [<suffix>]
*
* NOTE: basename() may modify path.
*/
filename = basename(argv[1]);
if (argc > 2)
{
FAR char *suffix = argv[2];
int nndx;
int sndx;
/* Check for any trailing sub-string */
nndx = strlen(filename);
sndx = strlen(suffix);
nndx -= sndx;
if (nndx > 0 && strcmp(&filename[nndx], suffix) == 0)
{
filename[nndx] = '\0';
}
}
/* And output the resulting basename */
nsh_output(vtbl, "%s\n", filename);
return OK;
}
#endif
/****************************************************************************
* Name: cmd_dirname
****************************************************************************/
#ifndef CONFIG_NSH_DISABLE_DIRNAME
int cmd_dirname(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
UNUSED(argc);
FAR char *filename;
/* Usage: dirname <path>
*
* NOTE: basename() may modify path.
*/
filename = dirname(argv[1]);
nsh_output(vtbl, "%s\n", filename);
return OK;
}
#endif
/****************************************************************************
* Name: cmd_cat
****************************************************************************/
#ifndef CONFIG_NSH_DISABLE_CAT
int cmd_cat(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
FAR char *fullpath;
int i;
int ret = OK;
/* Loop for each file name on the command line */
for (i = 1; i < argc && ret == OK; i++)
{
/* Get the fullpath to the file */
fullpath = nsh_getfullpath(vtbl, argv[i]);
if (fullpath == NULL)
{
nsh_error(vtbl, g_fmtcmdoutofmemory, argv[0]);
ret = ERROR;
}
else
{
/* Dump the file to the console */
ret = nsh_catfile(vtbl, argv[0], fullpath);
/* Free the allocated full path */
nsh_freefullpath(fullpath);
}
}
return ret;
}
#endif
/****************************************************************************
* Name: cmd_dmesg
****************************************************************************/
#if defined(CONFIG_SYSLOG_DEVPATH) && !defined(CONFIG_NSH_DISABLE_DMESG)
int cmd_dmesg(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
UNUSED(argc);
return nsh_catfile(vtbl, argv[0], CONFIG_SYSLOG_DEVPATH);
}
#endif
/****************************************************************************
* Name: cmd_cp
****************************************************************************/
#ifndef CONFIG_NSH_DISABLE_CP
int cmd_cp(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
UNUSED(argc);
struct stat buf;
FAR char *srcpath = NULL;
FAR char *destpath = NULL;
FAR char *allocpath = NULL;
int oflags = O_WRONLY | O_CREAT | O_TRUNC;
int rdfd;
int wrfd;
int ret = ERROR;
/* Get the full path to the source file */
srcpath = nsh_getfullpath(vtbl, argv[1]);
if (srcpath == NULL)
{
nsh_error(vtbl, g_fmtcmdoutofmemory, argv[0]);
goto errout;
}
/* Open the source file for reading */
rdfd = open(srcpath, O_RDONLY);
if (rdfd < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "open", NSH_ERRNO);
goto errout_with_srcpath;
}
/* Get the full path to the destination file or directory */
destpath = nsh_getfullpath(vtbl, argv[2]);
if (destpath == NULL)
{
nsh_error(vtbl, g_fmtcmdoutofmemory, argv[0]);
goto errout_with_rdfd;
}
/* Check if the destination is a directory */
ret = stat(destpath, &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
*/
nsh_trimdir(destpath);
/* Construct the full path to the new file */
allocpath = nsh_getdirpath(vtbl, destpath, basename(argv[1]));
if (!allocpath)
{
nsh_error(vtbl, g_fmtcmdoutofmemory, argv[0]);
goto errout_with_destpath;
}
/* Open then dest for writing */
nsh_freefullpath(destpath);
destpath = allocpath;
}
else if (!S_ISREG(buf.st_mode))
{
/* Maybe it is a driver? */
oflags = O_WRONLY;
}
}
/* Check if the destination does not match the source */
if (strcmp(destpath, srcpath) == 0)
{
nsh_error(vtbl, g_fmtsyntax, argv[0]);
goto errout_with_allocpath;
}
/* Now open the destination */
wrfd = open(destpath, oflags, 0666);
if (wrfd < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "open", NSH_ERRNO);
goto errout_with_allocpath;
}
/* Now copy the file */
for (; ; )
{
int nbytesread;
int nbyteswritten;
FAR char *iobuffer = vtbl->iobuffer;
do
{
nbytesread = read(rdfd, iobuffer, IOBUFFERSIZE);
if (nbytesread == 0)
{
/* End of file */
ret = OK;
goto errout_with_wrfd;
}
else if (nbytesread < 0)
{
/* EINTR is not an error (but will still stop the copy) */
if (errno == EINTR)
{
nsh_error(vtbl, g_fmtsignalrecvd, argv[0]);
}
else
{
/* Read error */
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "read",
NSH_ERRNO);
}
goto errout_with_wrfd;
}
}
while (nbytesread <= 0);
do
{
nbyteswritten = write(wrfd, iobuffer, nbytesread);
if (nbyteswritten >= 0)
{
nbytesread -= nbyteswritten;
iobuffer += nbyteswritten;
}
else
{
/* EINTR is not an error (but will still stop the copy) */
if (errno == EINTR)
{
nsh_error(vtbl, g_fmtsignalrecvd, argv[0]);
}
else
{
/* Read error */
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "write",
NSH_ERRNO);
}
goto errout_with_wrfd;
}
}
while (nbytesread > 0);
}
errout_with_wrfd:
close(wrfd);
errout_with_allocpath:
if (allocpath)
{
free(allocpath);
}
errout_with_destpath:
if (destpath && !allocpath)
{
nsh_freefullpath(destpath);
}
errout_with_rdfd:
close(rdfd);
errout_with_srcpath:
if (srcpath)
{
nsh_freefullpath(srcpath);
}
errout:
return ret;
}
#endif
/****************************************************************************
* Name: cmd_losetup
****************************************************************************/
#ifndef CONFIG_DISABLE_MOUNTPOINT
# if defined(CONFIG_DEV_LOOP) && !defined(CONFIG_NSH_DISABLE_LOSETUP)
int cmd_losetup(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
FAR char *loopdev = NULL;
FAR char *filepath = NULL;
struct losetup_s setup;
bool teardown = false;
bool readonly = false;
off_t offset = 0;
int sectsize = 512;
bool badarg = false;
int ret = ERROR;
int option;
int fd;
/* Get the losetup options: Two forms are supported:
*
* losetup -d <loop-device>
* losetup [-o <offset>] [-r] [-s <sectsize> ] <loop-device> <filename>
*
* NOTE that the -o and -r options are accepted with the -d option, but
* will be ignored.
*/
while ((option = getopt(argc, argv, "d:o:rs:")) != ERROR)
{
switch (option)
{
case 'd':
loopdev = nsh_getfullpath(vtbl, optarg);
teardown = true;
break;
case 'o':
offset = atoi(optarg);
break;
case 'r':
readonly = true;
break;
case 's':
sectsize = atoi(optarg);
break;
case '?':
default:
nsh_error(vtbl, g_fmtarginvalid, argv[0]);
badarg = true;
break;
}
}
/* If a bad argument was encountered,
* then return without processing the command
*/
if (badarg)
{
goto errout_with_paths;
}
/* If this is not a tear down operation, then additional command line
* parameters are required.
*/
if (!teardown)
{
/* There must be two arguments on the command line after the options */
if (optind + 1 < argc)
{
loopdev = nsh_getfullpath(vtbl, argv[optind]);
optind++;
filepath = nsh_getfullpath(vtbl, argv[optind]);
optind++;
}
else
{
nsh_error(vtbl, g_fmtargrequired, argv[0]);
goto errout_with_paths;
}
}
/* There should be nothing else on the command line */
if (optind < argc)
{
nsh_error(vtbl, g_fmttoomanyargs, argv[0]);
goto errout_with_paths;
}
/* Open the loop device */
fd = open("/dev/loop", O_RDONLY);
if (fd < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "open", NSH_ERRNO);
goto errout_with_paths;
}
/* Perform the teardown operation */
if (teardown)
{
/* Tear down the loop device. */
ret = ioctl(fd, LOOPIOC_TEARDOWN, (unsigned long)((uintptr_t)loopdev));
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "ioctl", NSH_ERRNO);
goto errout_with_fd;
}
}
else
{
/* Set up the loop device */
setup.devname = loopdev; /* The loop block device to be created */
setup.filename = filepath; /* The file or character device to use */
setup.sectsize = sectsize; /* The sector size to use with the block device */
setup.offset = offset; /* An offset that may be applied to the device */
setup.readonly = readonly; /* True: Read access will be supported only */
ret = ioctl(fd, LOOPIOC_SETUP, (unsigned long)((uintptr_t)&setup));
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "ioctl", NSH_ERRNO);
goto errout_with_fd;
}
}
ret = OK;
/* Free resources */
errout_with_fd:
close(fd);
errout_with_paths:
if (loopdev)
{
free(loopdev);
}
if (filepath)
{
free(filepath);
}
return ret;
}
#endif
#endif
/****************************************************************************
* Name: cmd_losmart
****************************************************************************/
#ifndef CONFIG_DISABLE_MOUNTPOINT
# if defined(CONFIG_SMART_DEV_LOOP) && !defined(CONFIG_NSH_DISABLE_LOSMART)
int cmd_losmart(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
FAR char *loopdev = NULL;
FAR char *filepath = NULL;
struct smart_losetup_s setup;
bool teardown = false;
bool readonly = false;
int minor = -1;
int erasesize = -1;
int sectsize = -1;
off_t offset = 0;
bool badarg = false;
int ret = ERROR;
int option;
int fd;
/* Get the losetup options: Two forms are supported:
*
* losmart -d <loop-device>
* losmart [-m minor-number] [-o <offset>] [-e erasesize] [-s sectsize]
* [-r] <filename>
*
* NOTE that the -o and -r options are accepted with the -d option, but
* will be ignored.
*/
while ((option = getopt(argc, argv, "d:e:m:o:rs:")) != ERROR)
{
switch (option)
{
case 'd':
loopdev = nsh_getfullpath(vtbl, optarg);
teardown = true;
break;
case 'e':
erasesize = atoi(optarg);
break;
case 'm':
minor = atoi(optarg);
break;
case 'o':
offset = atoi(optarg);
break;
case 'r':
readonly = true;
break;
case 's':
sectsize = atoi(optarg);
break;
case '?':
default:
nsh_error(vtbl, g_fmtarginvalid, argv[0]);
badarg = true;
break;
}
}
/* If a bad argument was encountered,
* then return without processing the command
*/
if (badarg)
{
goto errout_with_paths;
}
/* If this is not a tear down operation, then additional command line
* parameters are required.
*/
if (!teardown)
{
/* There must be two arguments on the command line after the options */
if (optind < argc)
{
filepath = nsh_getfullpath(vtbl, argv[optind]);
optind++;
}
else
{
nsh_error(vtbl, g_fmtargrequired, argv[0]);
goto errout_with_paths;
}
}
/* There should be nothing else on the command line */
if (optind < argc)
{
nsh_error(vtbl, g_fmttoomanyargs, argv[0]);
goto errout_with_paths;
}
/* Open the loop device */
fd = open("/dev/smart", O_RDONLY);
if (fd < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "open", NSH_ERRNO);
goto errout_with_paths;
}
/* Perform the teardown operation */
if (teardown)
{
/* Tear down the loop device. */
ret = ioctl(fd, SMART_LOOPIOC_TEARDOWN,
(unsigned long)((uintptr_t) loopdev));
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "ioctl", NSH_ERRNO);
goto errout_with_fd;
}
}
else
{
/* Set up the loop device */
setup.minor = minor; /* The loop block device to be created */
setup.filename = filepath; /* The file or character device to use */
setup.sectsize = sectsize; /* The sector size to use with the block device */
setup.erasesize = erasesize; /* The sector size to use with the block device */
setup.offset = offset; /* An offset that may be applied to the device */
setup.readonly = readonly; /* True: Read access will be supported only */
ret = ioctl(fd, SMART_LOOPIOC_SETUP,
(unsigned long)((uintptr_t)&setup));
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "ioctl", NSH_ERRNO);
goto errout_with_fd;
}
}
ret = OK;
/* Free resources */
errout_with_fd:
close(fd);
errout_with_paths:
if (loopdev)
{
free(loopdev);
}
if (filepath)
{
free(filepath);
}
return ret;
}
#endif
#endif
/****************************************************************************
* Name: cmd_lomtd
****************************************************************************/
#ifndef CONFIG_DISABLE_MOUNTPOINT
# if defined(CONFIG_MTD_LOOP) && !defined(CONFIG_NSH_DISABLE_LOMTD)
int cmd_lomtd(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
FAR char *loopdev = NULL;
FAR char *filepath = NULL;
struct mtd_losetup_s setup;
bool teardown = false;
int erasesize = -1;
int sectsize = -1;
off_t offset = 0;
bool badarg = false;
int ret = ERROR;
int option;
int fd;
/* Get the lomtd options: Two forms are supported:
*
* lomtd -d <loop-device>
* lomtd [-o <offset>] [-e erasesize] [-s sectsize]
* <loop-device> <filename>
*
* NOTE that the -o and -r options are accepted with the -d option, but
* will be ignored.
*/
while ((option = getopt(argc, argv, "d:o:e:s:")) != ERROR)
{
switch (option)
{
case 'd':
loopdev = nsh_getfullpath(vtbl, optarg);
teardown = true;
break;
case 'e':
erasesize = atoi(optarg);
break;
case 'o':
offset = atoi(optarg);
break;
case 's':
sectsize = atoi(optarg);
break;
case '?':
default:
nsh_error(vtbl, g_fmtarginvalid, argv[0]);
badarg = true;
break;
}
}
/* If a bad argument was encountered,
* then return without processing the command
*/
if (badarg)
{
goto errout_with_paths;
}
/* If this is not a tear down operation, then additional command line
* parameters are required.
*/
if (!teardown)
{
/* There must be two arguments on the command line after the options */
if (optind + 1 < argc)
{
loopdev = nsh_getfullpath(vtbl, argv[optind]);
optind++;
filepath = nsh_getfullpath(vtbl, argv[optind]);
optind++;
}
else
{
nsh_error(vtbl, g_fmtargrequired, argv[0]);
goto errout_with_paths;
}
}
/* There should be nothing else on the command line */
if (optind < argc)
{
nsh_error(vtbl, g_fmttoomanyargs, argv[0]);
goto errout_with_paths;
}
/* Open the loop device */
fd = open("/dev/loopmtd", O_RDONLY);
if (fd < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "open", NSH_ERRNO);
goto errout_with_paths;
}
/* Perform the teardown operation */
if (teardown)
{
/* Tear down the loop device. */
ret = ioctl(fd, MTD_LOOPIOC_TEARDOWN,
(unsigned long)((uintptr_t)loopdev));
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "ioctl", NSH_ERRNO);
goto errout_with_fd;
}
}
else
{
/* Set up the loop device */
setup.devname = loopdev; /* The loop block device to be created */
setup.filename = filepath; /* The file or character device to use */
setup.sectsize = sectsize; /* The sector size to use with the block device */
setup.erasesize = erasesize; /* The sector size to use with the block device */
setup.offset = offset; /* An offset that may be applied to the device */
ret = ioctl(fd, MTD_LOOPIOC_SETUP,
(unsigned long)((uintptr_t)&setup));
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "ioctl", NSH_ERRNO);
goto errout_with_fd;
}
}
ret = OK;
/* Free resources */
errout_with_fd:
close(fd);
errout_with_paths:
if (loopdev)
{
free(loopdev);
}
if (filepath)
{
free(filepath);
}
return ret;
}
# endif
#endif
/****************************************************************************
* Name: cmd_ln
****************************************************************************/
#if !defined(CONFIG_NSH_DISABLE_LN) && defined(CONFIG_PSEUDOFS_SOFTLINKS)
int cmd_ln(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
FAR char *linkpath;
FAR char *tgtpath;
int ndx;
int ret;
/* ln [-s] <target> <link> */
if (argc == 4)
{
if (strcmp(argv[1], "-s") != 0)
{
nsh_error(vtbl, g_fmtarginvalid, argv[0]);
return ERROR;
}
ndx = 2;
}
else
{
ndx = 1;
}
/* Get the full path to the link target */
tgtpath = nsh_getfullpath(vtbl, argv[ndx]);
if (tgtpath == NULL)
{
goto errout_with_nomemory;
}
/* Get the full path to the location where the link will be created */
linkpath = nsh_getfullpath(vtbl, argv[ndx + 1]);
if (linkpath == NULL)
{
goto errout_with_tgtpath;
}
if (ndx == 1)
{
ret = link(tgtpath, linkpath);
}
else
{
ret = symlink(tgtpath, linkpath);
}
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "link", NSH_ERRNO);
ret = ERROR;
}
nsh_freefullpath(linkpath);
nsh_freefullpath(tgtpath);
return ret;
errout_with_tgtpath:
nsh_freefullpath(tgtpath);
errout_with_nomemory:
nsh_error(vtbl, g_fmtcmdoutofmemory, argv[0]);
return ERROR;
}
#endif
/****************************************************************************
* Name: cmd_ls
****************************************************************************/
#ifndef CONFIG_NSH_DISABLE_LS
int cmd_ls(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
struct stat st;
FAR const char *relpath;
unsigned int lsflags = 0;
FAR char *fullpath;
bool badarg = false;
int len;
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_error(vtbl, g_fmtarginvalid, argv[0]);
badarg = true;
break;
}
}
/* If a bad argument was encountered,
* then return without processing the command
*/
if (badarg)
{
return ERROR;
}
/* There may be one argument after the options */
if (optind + 1 < argc)
{
nsh_error(vtbl, g_fmttoomanyargs, argv[0]);
return ERROR;
}
else if (optind >= argc)
{
#ifndef CONFIG_DISABLE_ENVIRON
relpath = nsh_getcwd();
#else
nsh_error(vtbl, g_fmtargrequired, argv[0]);
return ERROR;
#endif
}
else
{
relpath = argv[optind];
}
/* Get the fullpath to the directory */
fullpath = nsh_getfullpath(vtbl, relpath);
if (fullpath == NULL)
{
nsh_error(vtbl, g_fmtcmdoutofmemory, argv[0]);
return ERROR;
}
/* Trim any trailing '/' characters */
len = strlen(fullpath) - 1;
while (len > 0 && fullpath[len] == '/')
{
fullpath[len] = '\0';
len--;
}
/* See if it is a single file */
if (stat(fullpath, &st) < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "stat", NSH_ERRNO);
ret = ERROR;
}
else if (!S_ISDIR(st.st_mode))
{
/* Pass a null dirent to ls_handler to signify that this is a single
* file
*/
ret = ls_handler(vtbl, fullpath, NULL,
(FAR void *)((uintptr_t)lsflags));
}
else
{
/* List the directory contents */
nsh_output(vtbl, "%s:\n", fullpath);
ret = nsh_foreach_direntry(vtbl, "ls", fullpath, ls_handler,
(FAR void *)((uintptr_t)lsflags));
if (ret == OK && (lsflags & LSFLAGS_RECURSIVE) != 0)
{
/* Then recurse to list each directory within the directory */
ret = nsh_foreach_direntry(vtbl, "ls", fullpath, ls_recursive,
(FAR void *)((uintptr_t)lsflags));
}
}
nsh_freefullpath(fullpath);
return ret;
}
#endif
/****************************************************************************
* Name: cmd_mkdir
****************************************************************************/
#ifdef NSH_HAVE_DIROPTS
#ifndef CONFIG_NSH_DISABLE_MKDIR
int cmd_mkdir(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
FAR char *fullpath = NULL;
bool parent = false;
int ret = ERROR;
int option;
while ((option = getopt(argc, argv, "p")) != ERROR)
{
switch (option)
{
case 'p':
parent = true;
break;
}
}
if (optind < argc)
{
fullpath = nsh_getfullpath(vtbl, argv[optind]);
}
if (fullpath != NULL)
{
FAR char *slash = parent ? fullpath : "";
for (; ; )
{
slash = strchr(slash, '/');
if (slash != NULL)
{
*slash = '\0';
}
ret = mkdir(fullpath, 0777);
if (ret < 0 && (errno != EEXIST || !parent))
{
nsh_error(vtbl, g_fmtcmdfailed,
fullpath, "mkdir", NSH_ERRNO);
break;
}
if (slash != NULL)
{
*slash++ = '/';
}
else
{
break;
}
}
nsh_freefullpath(fullpath);
}
return ret;
}
#endif
#endif
/****************************************************************************
* Name: cmd_mkfatfs
****************************************************************************/
#if !defined(CONFIG_DISABLE_MOUNTPOINT) && defined(CONFIG_FSUTILS_MKFATFS)
#ifndef CONFIG_NSH_DISABLE_MKFATFS
int cmd_mkfatfs(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
struct fat_format_s fmt = FAT_FORMAT_INITIALIZER;
FAR char *fullpath;
bool badarg;
int option;
int rootdirentries;
int ret = ERROR;
/* mkfatfs [-F <fatsize>] <block-driver> */
badarg = false;
while ((option = getopt(argc, argv, ":F:r:")) != ERROR)
{
switch (option)
{
case 'F':
fmt.ff_fattype = atoi(optarg);
if (fmt.ff_fattype != 0 && fmt.ff_fattype != 12 &&
fmt.ff_fattype != 16 && fmt.ff_fattype != 32)
{
nsh_error(vtbl, g_fmtargrange, argv[0]);
badarg = true;
}
break;
case 'r':
rootdirentries = atoi(optarg);
if (rootdirentries >= 0)
{
fmt.ff_rootdirentries = rootdirentries;
}
else
{
nsh_error(vtbl, g_fmtargrange, argv[0]);
badarg = true;
}
break;
case ':':
nsh_error(vtbl, g_fmtargrequired, argv[0]);
badarg = true;
break;
case '?':
default:
nsh_error(vtbl, g_fmtarginvalid, argv[0]);
badarg = true;
break;
}
}
/* If a bad argument was encountered,
* then return without processing the command
*/
if (badarg)
{
return ERROR;
}
/* There should be exactly one parameter left on the command-line */
if (optind == argc - 1)
{
fullpath = nsh_getfullpath(vtbl, argv[optind]);
if (fullpath == NULL)
{
nsh_error(vtbl, g_fmtcmdoutofmemory, argv[0]);
return ERROR;
}
}
else if (optind < argc)
{
nsh_error(vtbl, g_fmttoomanyargs, argv[0]);
return ERROR;
}
else
{
nsh_error(vtbl, g_fmtargrequired, argv[0]);
return ERROR;
}
/* Now format the FAT file system */
ret = mkfatfs(fullpath, &fmt);
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "mkfatfs", NSH_ERRNO);
}
nsh_freefullpath(fullpath);
return ret;
}
#endif
#endif
/****************************************************************************
* Name: cmd_mkfifo
****************************************************************************/
#if defined(CONFIG_PIPES) && CONFIG_DEV_FIFO_SIZE > 0 && \
!defined(CONFIG_NSH_DISABLE_MKFIFO)
int cmd_mkfifo(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
UNUSED(argc);
FAR char *fullpath = nsh_getfullpath(vtbl, argv[1]);
int ret = ERROR;
if (fullpath != NULL)
{
ret = mkfifo(fullpath, 0777);
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "mkfifo", NSH_ERRNO);
}
nsh_freefullpath(fullpath);
}
return ret;
}
#endif /* CONFIG_PIPES && CONFIG_DEV_FIFO_SIZE > 0 && !CONFIG_NSH_DISABLE_MKFIFO */
/****************************************************************************
* Name: cmd_mkrd
****************************************************************************/
#ifndef CONFIG_NSH_DISABLE_MKRD
int cmd_mkrd(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
FAR const char *fmt;
struct boardioc_mkrd_s desc;
uint32_t nsectors;
bool badarg = false;
int sectsize = 512;
int minor = 0;
int ret;
/* Get the mkrd options */
int option;
while ((option = getopt(argc, argv, ":m:s:")) != ERROR)
{
switch (option)
{
case 'm':
minor = atoi(optarg);
if (minor < 0 || minor > 255)
{
nsh_error(vtbl, g_fmtargrange, argv[0]);
badarg = true;
}
break;
case 's':
sectsize = atoi(optarg);
if (minor < 0 || minor > 16384)
{
nsh_error(vtbl, g_fmtargrange, argv[0]);
badarg = true;
}
break;
case ':':
nsh_error(vtbl, g_fmtargrequired, argv[0]);
badarg = true;
break;
case '?':
default:
nsh_error(vtbl, g_fmtarginvalid, argv[0]);
badarg = true;
break;
}
}
/* If a bad argument was encountered,
* then return without processing the command
*/
if (badarg)
{
return ERROR;
}
/* There should be exactly one parameter left on the command-line */
if (optind == argc - 1)
{
nsectors = (uint32_t)atoi(argv[optind]);
}
else if (optind < argc)
{
fmt = g_fmttoomanyargs;
goto errout_with_fmt;
}
else
{
fmt = g_fmtargrequired;
goto errout_with_fmt;
}
/* Then create the ramdisk */
desc.minor = minor; /* Minor device number of the RAM disk. */
desc.nsectors = nsectors; /* The number of sectors in the RAM disk. */
desc.sectsize = sectsize; /* The size of one sector in bytes. */
desc.rdflags = RDFLAG_WRENABLED | RDFLAG_FUNLINK;
ret = boardctl(BOARDIOC_MKRD, (uintptr_t)&desc);
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "boardctl(BOARDIOC_MKRD)",
NSH_ERRNO_OF(-ret));
return ERROR;
}
return ret;
errout_with_fmt:
nsh_output(vtbl, fmt, argv[0]);
return ERROR;
}
#endif
/****************************************************************************
* Name: cmd_mksmartfs
****************************************************************************/
#if !defined(CONFIG_DISABLE_MOUNTPOINT) && defined(CONFIG_FS_SMARTFS) && \
defined(CONFIG_FSUTILS_MKSMARTFS)
#ifndef CONFIG_NSH_DISABLE_MKSMARTFS
int cmd_mksmartfs(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
FAR char *fullpath = NULL;
int ret = OK;
uint16_t sectorsize = 0;
int force = 0;
int opt;
#ifdef CONFIG_SMARTFS_MULTI_ROOT_DIRS
int nrootdirs = 1;
#endif
/* Process any options */
optind = 0;
while ((opt = getopt(argc, argv, "fs:")) != -1)
{
switch (opt)
{
case 'f':
force = 1;
break;
case 's':
sectorsize = atoi(optarg);
if (sectorsize < 256 || sectorsize > 16384)
{
nsh_error(vtbl, "Sector size must be 256-16384\n");
return EINVAL;
}
if (sectorsize & (sectorsize - 1))
{
nsh_error(vtbl, "Sector size must be power of 2\n");
return EINVAL;
}
break;
default:
break;
}
}
if (optind < argc)
{
fullpath = nsh_getfullpath(vtbl, argv[optind]);
}
if (fullpath)
{
/* Test if number of root directories was supplied */
#ifdef CONFIG_SMARTFS_MULTI_ROOT_DIRS
if (optind + 1 < argc)
{
nrootdirs = atoi(argv[optind + 1]);
}
if (nrootdirs > 8 || nrootdirs < 1)
{
nsh_error(vtbl, "Invalid number of root directories specified\n");
}
else
#endif
if (force || issmartfs(fullpath) != OK)
{
#ifdef CONFIG_SMARTFS_MULTI_ROOT_DIRS
ret = mksmartfs(fullpath, sectorsize, nrootdirs);
#else
ret = mksmartfs(fullpath, sectorsize);
#endif
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "mksmartfs",
NSH_ERRNO);
}
}
nsh_freefullpath(fullpath);
}
return ret;
}
#endif
#endif
/****************************************************************************
* Name: cmd_mv
****************************************************************************/
#ifdef NSH_HAVE_DIROPTS
#ifndef CONFIG_NSH_DISABLE_MV
int cmd_mv(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
UNUSED(argc);
FAR char *oldpath;
FAR char *newpath;
int ret;
/* Get the full path to the old and new file paths */
oldpath = nsh_getfullpath(vtbl, argv[1]);
if (oldpath == NULL)
{
nsh_error(vtbl, g_fmtcmdoutofmemory, argv[0]);
return ERROR;
}
newpath = nsh_getfullpath(vtbl, argv[2]);
if (newpath == NULL)
{
nsh_error(vtbl, g_fmtcmdoutofmemory, argv[0]);
ret = ERROR;
goto errout_with_oldpath;
}
/* Perform the mount */
ret = rename(oldpath, newpath);
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "rename", NSH_ERRNO);
}
/* Free the file paths */
nsh_freefullpath(newpath);
errout_with_oldpath:
nsh_freefullpath(oldpath);
return ret;
}
#endif
#endif
/****************************************************************************
* Name: cmd_readlink
****************************************************************************/
#if !defined(CONFIG_NSH_DISABLE_READLINK) && defined(CONFIG_PSEUDOFS_SOFTLINKS)
int cmd_readlink(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
UNUSED(argc);
FAR char *fullpath;
ssize_t len;
/* readlink <link> */
/* Get the fullpath to the directory */
fullpath = nsh_getfullpath(vtbl, argv[1]);
if (fullpath == NULL)
{
nsh_error(vtbl, g_fmtcmdoutofmemory, argv[0]);
return ERROR;
}
len = readlink(fullpath, vtbl->iobuffer, IOBUFFERSIZE);
nsh_freefullpath(fullpath);
if (len < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, "ls", "readlink", NSH_ERRNO);
return ERROR;
}
nsh_output(vtbl, "%s\n", vtbl->iobuffer);
return OK;
}
#endif
/****************************************************************************
* Name: cmd_rm
****************************************************************************/
#ifdef NSH_HAVE_DIROPTS
#ifndef CONFIG_NSH_DISABLE_RM
static int unlink_recursive(FAR char *path)
{
struct dirent *d;
struct stat stat;
size_t len;
int ret;
DIR *dp;
ret = lstat(path, &stat);
if (ret < 0)
{
return ret;
}
if (!S_ISDIR(stat.st_mode))
{
return unlink(path);
}
dp = opendir(path);
if (dp == NULL)
{
return -1;
}
len = strlen(path);
if (len > 0 && path[len - 1] == '/')
{
path[--len] = '\0';
}
while ((d = readdir(dp)) != NULL)
{
if (strcmp(d->d_name, ".") == 0 || strcmp(d->d_name, "..") == 0)
{
continue;
}
snprintf(&path[len], PATH_MAX - len, "/%s", d->d_name);
ret = unlink_recursive(path);
if (ret < 0)
{
closedir(dp);
return ret;
}
}
ret = closedir(dp);
if (ret >= 0)
{
path[len] = '\0';
ret = rmdir(path);
}
return ret;
}
int cmd_rm(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
bool recursive = (strcmp(argv[1], "-r") == 0);
FAR char *fullpath;
char buf[PATH_MAX];
int ret = ERROR;
if (recursive && argc == 2)
{
nsh_error(vtbl, g_fmtargrequired, argv[0]);
return ret;
}
fullpath = nsh_getfullpath(vtbl, recursive ? argv[2] : argv[1]);
if (fullpath != NULL)
{
if (recursive)
{
strlcpy(buf, fullpath, PATH_MAX);
ret = unlink_recursive(buf);
}
else
{
ret = unlink(fullpath);
}
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "unlink", NSH_ERRNO);
}
nsh_freefullpath(fullpath);
}
return ret;
}
#endif
#endif
/****************************************************************************
* Name: cmd_rmdir
****************************************************************************/
#ifdef NSH_HAVE_DIROPTS
#ifndef CONFIG_NSH_DISABLE_RMDIR
int cmd_rmdir(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
UNUSED(argc);
FAR char *fullpath = nsh_getfullpath(vtbl, argv[1]);
int ret = ERROR;
if (fullpath != NULL)
{
ret = rmdir(fullpath);
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "rmdir", NSH_ERRNO);
}
nsh_freefullpath(fullpath);
}
return ret;
}
#endif
#endif
/****************************************************************************
* Name: cmd_source
****************************************************************************/
#if !defined(CONFIG_NSH_DISABLESCRIPT) && !defined(CONFIG_NSH_DISABLE_SOURCE)
int cmd_source(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
UNUSED(argc);
return nsh_script(vtbl, argv[0], argv[1], true);
}
#endif
/****************************************************************************
* Name: cmd_cmp
****************************************************************************/
#ifndef CONFIG_NSH_DISABLE_CMP
int cmd_cmp(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
UNUSED(argc);
FAR char *path1 = NULL;
FAR char *path2 = NULL;
int fd1 = -1;
int fd2 = -1;
int ret = ERROR;
/* Get the full path to the two files */
path1 = nsh_getfullpath(vtbl, argv[1]);
if (path1 == NULL)
{
nsh_error(vtbl, g_fmtargrequired, argv[0]);
goto errout;
}
path2 = nsh_getfullpath(vtbl, argv[2]);
if (path2 == NULL)
{
nsh_error(vtbl, g_fmtargrequired, argv[0]);
goto errout_with_path1;
}
/* Open the files for reading */
fd1 = open(path1, O_RDONLY);
if (fd1 < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "open", NSH_ERRNO);
goto errout_with_path2;
}
fd2 = open(path2, O_RDONLY);
if (fd2 < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "open", NSH_ERRNO);
goto errout_with_fd1;
}
/* The loop until we hit the end of file or find a difference in the two
* files.
*/
for (; ; )
{
char buf1[128];
char buf2[128];
/* Read the file data */
ssize_t nbytesread1 = read(fd1, buf1, sizeof(buf1));
ssize_t nbytesread2 = read(fd2, buf2, sizeof(buf2));
if (nbytesread1 < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "read", NSH_ERRNO);
goto errout_with_fd2;
}
if (nbytesread2 < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "read", NSH_ERRNO);
goto errout_with_fd2;
}
/* Compare the file data */
if (nbytesread1 != nbytesread2 ||
memcmp(buf1, buf2, nbytesread1) != 0)
{
nsh_error(vtbl, "files differ: byte %zd\n",
nbytesread1 > nbytesread2 ? nbytesread2 : nbytesread1);
goto errout_with_fd2;
}
/* A partial read indicates the end of file (usually) */
if (nbytesread1 < (ssize_t)sizeof(buf1))
{
break;
}
}
/* The files are the same, i.e., the end of file was encountered
* without finding any differences.
*/
ret = OK;
errout_with_fd2:
close(fd2);
errout_with_fd1:
close(fd1);
errout_with_path2:
nsh_freefullpath(path2);
errout_with_path1:
nsh_freefullpath(path1);
errout:
return ret;
}
#endif
/****************************************************************************
* Name: cmd_truncate
****************************************************************************/
#ifndef CONFIG_DISABLE_MOUNTPOINT
#ifndef CONFIG_NSH_DISABLE_TRUNCATE
int cmd_truncate(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
{
UNUSED(argc);
FAR char *fullpath;
FAR char *endptr;
struct stat buf;
unsigned long length;
int ret;
/* truncate -s <length> <file-path> */
if (strcmp(argv[1], "-s") != 0)
{
nsh_error(vtbl, g_fmtarginvalid, argv[0]);
return ERROR;
}
length = strtoul(argv[2], &endptr, 0);
if (*endptr != '\0')
{
nsh_error(vtbl, g_fmtarginvalid, argv[0]);
return ERROR;
}
/* Get the full path to the file */
fullpath = nsh_getfullpath(vtbl, argv[3]);
if (fullpath == NULL)
{
nsh_error(vtbl, g_fmtcmdoutofmemory, argv[0]);
return ERROR;
}
/* stat the file */
ret = stat(fullpath, &buf);
if (ret < 0)
{
int errval = errno;
/* If stat() failed because the file does not exist, then try to
* create it.
*/
if (errval == ENOENT)
{
int fd = creat(fullpath, 0666);
if (fd < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "stat", NSH_ERRNO);
ret = ERROR;
}
else
{
/* We successfully performed the create and now have a zero-
* length file. Perform the truncation to extend the
* allocation (unless we really wanted a zero-length file).
*/
ret = OK;
if (length > 0)
{
/* Extend the file to length */
ret = ftruncate(fd, length);
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "ftruncate",
NSH_ERRNO);
}
}
close(fd);
}
}
else
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "stat",
NSH_ERRNO_OF(errval));
ret = ERROR;
}
}
else if (!S_ISREG(buf.st_mode))
{
nsh_error(vtbl, g_fmtarginvalid, argv[0]);
ret = ERROR;
}
else
{
/* Everything looks good... perform the truncation */
ret = truncate(fullpath, length);
if (ret < 0)
{
nsh_error(vtbl, g_fmtcmdfailed, argv[0], "truncate", NSH_ERRNO);
}
}
nsh_freefullpath(fullpath);
return ret;
}
#endif
#endif
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