Add chdir() and getcwd()
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@837 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
parent
9370f6c69c
commit
729d55afec
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@ -417,4 +417,6 @@
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* NSH now supports comments beginning with '#'
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* NSH now supports commands to inspect and modify memory
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* NSH cat command now supports multiple files on command line
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* Add chdir() and getcwd()
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@ -8,7 +8,7 @@
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<tr align="center" bgcolor="#e4e4e4">
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<td>
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<h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
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<p>Last Updated: August 21, 2008</p>
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<p>Last Updated: August 22, 2008</p>
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</td>
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</tr>
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</table>
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@ -1051,6 +1051,7 @@ nuttx-0.3.13 2008-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
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* NSH now supports comments beginning with '#'
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* NSH now supports commands to inspect and modify memory
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* NSH cat command now supports multiple files on command line
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* Add chdir() and getcwd()
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pascal-0.1.3 2008-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
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@ -21,7 +21,7 @@ User's Manual
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<p>
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Gregory Nutt
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<p>
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<small>Last Update: August 10, 2008</small>
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<small>Last Update: August 22, 2008</small>
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</center>
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<h1>1.0 <A NAME="Introduction">Introduction</a></h1>
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@ -5942,6 +5942,11 @@ interface of the same name.
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void seekdir(FAR DIR *dirp, int loc);
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int telldir(FAR DIR *dirp);
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</pre></ul>
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<ul><pre>
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#include <unistd.h>
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int chdir(FAR const char *path);
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FAR char *getcwd(FAR char *buf, size_t size);
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</pre></ul>
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<h2><a name="standardio">2.11.4 Standard I/O</a></h2>
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<ul><pre>
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@ -5970,10 +5975,8 @@ interface of the same name.
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int vfprintf(FILE *stream, const char *s, va_list ap);
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int vsprintf(char *buf, const char *s, va_list ap);
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int chdir(const char *path); /* Prototyped but not implemented */
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FILE *fdopen(int fd, const char *type);
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int fstat(int fd, FAR struct stat *buf); /* Prototyped but not implemented */
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char *getcwd(FAR char *buf, size_t size); /* Prototyped but not implemented */
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int mkdir(const char *path, mode_t mode);
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int rmdir(const char *path);
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int stat(const char *path, FAR struct stat *buf);
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@ -134,9 +134,7 @@ EXTERN int vsnprintf(char *buf, size_t size, const char *format, va_list ap);
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/* POSIX-like File System Interfaces */
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EXTERN int chdir(const char *path);
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EXTERN FILE *fdopen(int fd, const char *type);
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EXTERN char *getcwd(FAR char *buf, size_t size);
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EXTERN int statfs(const char *path, FAR struct statfs *buf);
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#undef EXTERN
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@ -136,8 +136,14 @@ EXTERN ssize_t read(int fd, FAR void *buf, size_t nbytes);
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EXTERN ssize_t write(int fd, FAR const void *buf, size_t nbytes);
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/* Special devices */
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EXTERN int pipe(int filedes[2]);
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/* Working directory operations */
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EXTERN int chdir(FAR const char *path);
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EXTERN FAR char *getcwd(FAR char *buf, size_t size);
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/* File path operations */
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EXTERN int unlink(FAR const char *pathname);
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@ -57,7 +57,7 @@ STDIO_SRCS = lib_printf.c lib_rawprintf.c lib_lowprintf.c lib_dbg.c \
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lib_lowstream.c lib_nullstream.c lib_sscanf.c
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ifneq ($(CONFIG_NFILE_DESCRIPTORS),0)
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STDIO_SRCS += lib_rawstream.c
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STDIO_SRCS += lib_rawstream.c lib_chdir.c lib_getcwd.c lib_cwdsem.c
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ifneq ($(CONFIG_NFILE_STREAMS),0)
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STDIO_SRCS += lib_fopen.c lib_fclose.c lib_fread.c lib_libfread.c lib_fseek.c \
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lib_fgetc.c lib_fgets.c lib_gets.c lib_fwrite.c lib_libfwrite.c \
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@ -0,0 +1,131 @@
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/****************************************************************************
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* lib/lib_chdir.c
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*
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* Copyright (C) 2008 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
|
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* are met:
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||||
*
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||||
* 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
|
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include "lib_internal.h"
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/****************************************************************************
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* Public Variables
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****************************************************************************/
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#if CONFIG_NFILE_DESCRIPTORS > 0
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char *g_cwd = NULL;
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char *g_prevcwd = NULL;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: chdir
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*
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* Description:
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* The chdir() function causes the directory named by the pathname pointed
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* to by the 'path' argument to become the current working directory; that
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* is, the starting point for path searches for pathnames not beginning
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* with '/'.
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*
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* Input Parmeters:
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* path - A pointer to a directory to use as the new current working
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* directory
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*
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* Returned Value:
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* 0(OK) on success; -1(ERROR) on failure with errno set appropriately:
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*
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* EACCES
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* Search permission is denied for any component of the pathname.
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* ELOOP
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* A loop exists in symbolic links encountered during resolution of the
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* 'path' argument OR more that SYMLOOP_MAX symbolic links in the
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* resolution of the 'path' argument.
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* ENAMETOOLONG
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* The length of the path argument exceeds PATH_MAX or a pathname component
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* is longer than NAME_MAX.
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* ENOENT
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* A component of 'path' does not name an existing directory or path is
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* an empty string.
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* ENOTDIR
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* A component of the pathname is not a directory.
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*
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****************************************************************************/
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int chdir(FAR const char *path)
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{
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char *duppath;
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/* Verify the input parameters */
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if (!path)
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{
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errno = ENOENT;
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return ERROR;
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}
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/* Verify that 'path' refers to a directory */
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/* (To be provided) */
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/* Make a persistent copy of 'path' */
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duppath = strdup(path);
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/* Free any preceding cwd and set the previous to the cwd (this
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* is to support 'cd -' in NSH
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*/
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cwd_semtake();
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if (g_prevcwd)
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{
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free(g_prevcwd);
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}
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g_prevcwd = g_cwd;
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/* Set the cwd to a persistent copy of the input 'path' */
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g_cwd = duppath;
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cwd_semgive();
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return OK;
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}
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#endif /* CONFIG_NFILE_DESCRIPTORS */
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@ -0,0 +1,86 @@
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/****************************************************************************
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* lib/lib_cwdsem.c
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*
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* Copyright (C) 2008 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* 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.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <assert.h>
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#include <semaphore.h>
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#include <errno.h>
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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#if CONFIG_NFILE_DESCRIPTORS > 0
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static sem_t g_cwdsem = { 1 };
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: cwd_semtake
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****************************************************************************/
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void cwd_semtake(void)
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{
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/* Take the semaphore (perhaps waiting) */
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while (sem_wait(&g_cwdsem) != 0)
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{
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/* The only case that an error should occr here is if the wait was
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* awakened by a signal.
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*/
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ASSERT(errno == EINTR);
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}
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}
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/****************************************************************************
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* Name: cwd_semgive
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****************************************************************************/
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void cwd_semgive(void)
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{
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/* Give the semaphore */
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(void)sem_post(&g_cwdsem);
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}
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#endif /* CONFIG_NFILE_DESCRIPTORS */
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@ -0,0 +1,139 @@
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/****************************************************************************
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* lib/lib_getcwd.c
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*
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* Copyright (C) 2008 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
|
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* 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.
|
||||
*
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****************************************************************************/
|
||||
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/****************************************************************************
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* Included Files
|
||||
****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include "lib_internal.h"
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/****************************************************************************
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* Definitions
|
||||
****************************************************************************/
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/****************************************************************************
|
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* Public Variables
|
||||
****************************************************************************/
|
||||
|
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/****************************************************************************
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* Public Functions
|
||||
****************************************************************************/
|
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|
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/****************************************************************************
|
||||
* Name: getwcd
|
||||
*
|
||||
* Description:
|
||||
* getcwd() function places the absolute pathname of the current working
|
||||
* directory in the array pointed to by 'buf', and returns 'buf.' The
|
||||
* pathname copied to the array shall contain no components that are
|
||||
* symbolic links. The 'size' argument is the size in bytes of the
|
||||
* character array pointed to by the 'buf' argument.
|
||||
*
|
||||
* Input Parmeters:
|
||||
* buf - a pointer to the location in which the current working directory
|
||||
* pathaname is returned.
|
||||
* size - The size in bytes avaiable at 'buf'
|
||||
*
|
||||
* Returned Value:
|
||||
* Upon successful completion, getcwd() returns the 'buf' argument.
|
||||
* Otherwise, getcwd() returns a null pointer and sets errno to indicate
|
||||
* the error:
|
||||
*
|
||||
* EINVAL
|
||||
* The 'size' argument is 0 or the 'buf' argument is NULL.
|
||||
* ERANGE
|
||||
* The size argument is greater than 0, but is smaller than the length
|
||||
* of the currrent working directory pathname +1.
|
||||
* EACCES
|
||||
* Read or search permission was denied for a component of the pathname.
|
||||
* ENOMEM
|
||||
* Insufficient storage space is available.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if CONFIG_NFILE_DESCRIPTORS > 0
|
||||
FAR char *getcwd(FAR char *buf, size_t size)
|
||||
{
|
||||
const char *ptr;
|
||||
int err;
|
||||
|
||||
/* Verify input parameters */
|
||||
|
||||
if (!buf || !size)
|
||||
{
|
||||
err = EINVAL;
|
||||
goto errout;
|
||||
}
|
||||
|
||||
/* If no working directory is defined, then default to the home directory */
|
||||
|
||||
cwd_semtake();
|
||||
if (g_cwd)
|
||||
{
|
||||
ptr = g_cwd;
|
||||
}
|
||||
else
|
||||
{
|
||||
ptr = CONFIG_LIB_HOMEDIR;
|
||||
}
|
||||
|
||||
/* Verify that the cwd will fit into the user-provided buffer */
|
||||
|
||||
if (strlen(ptr) + 1 > size)
|
||||
{
|
||||
err = ERANGE;
|
||||
goto errout_with_sem;
|
||||
}
|
||||
|
||||
/* Copy the cwd to the user buffer */
|
||||
|
||||
strcpy(buf, ptr);
|
||||
cwd_semgive();
|
||||
return buf;
|
||||
|
||||
errout_with_sem:
|
||||
cwd_semgive();
|
||||
errout:
|
||||
errno = err;
|
||||
return NULL;
|
||||
}
|
||||
#endif /* CONFIG_NFILE_DESCRIPTORS */
|
|
@ -1,7 +1,7 @@
|
|||
/************************************************************
|
||||
* lib_internal.h
|
||||
/****************************************************************************
|
||||
* lib/lib_internal.h
|
||||
*
|
||||
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
|
||||
* 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
|
||||
|
@ -14,7 +14,7 @@
|
|||
* 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
|
||||
* 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.
|
||||
*
|
||||
|
@ -31,22 +31,26 @@
|
|||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
************************************************************/
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __LIB_INTERNAL_H
|
||||
#define __LIB_INTERNAL_H
|
||||
|
||||
/************************************************************
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
************************************************************/
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
#include <stdio.h>
|
||||
#include <semaphore.h>
|
||||
|
||||
/************************************************************
|
||||
/****************************************************************************
|
||||
* Definitions
|
||||
************************************************************/
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef CONFIG_LIB_HOMEDIR
|
||||
# define CONFIG_LIB_HOMEDIR "/"
|
||||
#endif
|
||||
|
||||
#if CONFIG_STDIO_BUFFER_SIZE <= 0
|
||||
# define lib_sem_initialize(s)
|
||||
|
@ -56,9 +60,9 @@
|
|||
|
||||
#define LIB_BUFLEN_UNKNOWN (0x7fffffff)
|
||||
|
||||
/************************************************************
|
||||
/****************************************************************************
|
||||
* Public Types
|
||||
************************************************************/
|
||||
****************************************************************************/
|
||||
|
||||
/* This is the generic for of a stream used by the library
|
||||
* to manage variable sized output.
|
||||
|
@ -94,13 +98,18 @@ struct lib_rawstream_s
|
|||
int fd;
|
||||
};
|
||||
|
||||
/************************************************************
|
||||
/****************************************************************************
|
||||
* Public Variables
|
||||
************************************************************/
|
||||
****************************************************************************/
|
||||
|
||||
#if CONFIG_NFILE_DESCRIPTORS > 0
|
||||
extern char *g_cwd; /* Defined in lib_chdir.c */
|
||||
extern char *g_prevcwd; /* Defined in lib_chdir.c */
|
||||
#endif
|
||||
|
||||
/************************************************************
|
||||
/****************************************************************************
|
||||
* Public Function Prototypes
|
||||
************************************************************/
|
||||
****************************************************************************/
|
||||
|
||||
/* Defined in lib_streamsem.c */
|
||||
|
||||
|
@ -184,4 +193,9 @@ extern void lib_give_semaphore(FAR struct file_struct *stream);
|
|||
|
||||
extern int lib_getbase(const char *nptr, const char **endptr);
|
||||
|
||||
/* Defined in lib_cwdsem.c */
|
||||
|
||||
extern void cwd_semtake(void);
|
||||
extern void cwd_semgive(void);
|
||||
|
||||
#endif /* __LIB_INTERNAL_H */
|
||||
|
|
|
@ -1,7 +1,7 @@
|
|||
/************************************************************
|
||||
* lib_strlen.c
|
||||
/****************************************************************************
|
||||
* lib/lib_strlen.c
|
||||
*
|
||||
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
|
||||
* 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
|
||||
|
@ -14,7 +14,7 @@
|
|||
* 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
|
||||
* 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.
|
||||
*
|
||||
|
@ -31,23 +31,19 @@
|
|||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
************************************************************/
|
||||
****************************************************************************/
|
||||
|
||||
/************************************************************
|
||||
* Compilation Switches
|
||||
************************************************************/
|
||||
|
||||
/************************************************************
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
************************************************************/
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
#include <sys/types.h>
|
||||
#include <string.h>
|
||||
|
||||
/************************************************************
|
||||
/****************************************************************************
|
||||
* Global Functions
|
||||
************************************************************/
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef CONFIG_ARCH_STRLEN
|
||||
size_t strlen(const char *s)
|
||||
|
|
Loading…
Reference in New Issue