C++遍历目录，并把目录里超过7天的文件删除，适用于项目里删除过期的日志，或者视频文件。
在windows和linux下测试通过。
windows测试结果：
linux测试结果：
源码：
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "dirent.h"
#include <sys/stat.h>
#include <errno.h>
#ifdef WIN32 #else
#include <unistd.h>
#endif static int find_directory (const char *dirname); int main(int argc, char *argv[])
{
int i;
int result; //循环遍历命令行里的每个目录
i = ;
while (i < argc) {
result = find_directory (argv[i]);
if (result == -) {
exit (EXIT_FAILURE);
}
i++;
} //如果命令行参数为空，则遍历当前工作目录
if (argc == ) {
find_directory (".");
}
return EXIT_SUCCESS;
} //删除7天前的文件
int RemoveFile( char* filename )
{
int result;
//errno_t errno;
//获取文件信息
#ifdef WIN32
struct _stat buf;
result = _stat(filename, &buf);
#else
struct stat buf;
result = stat(filename, &buf);
#endif if( result != )
{
perror( "Problem getting information" );
switch (errno)
{
case ENOENT:
printf("File %s not found.\n", filename);
break;
case EINVAL:
printf("Invalid parameter to _stat.\n");
break;
default:
/* Should never be reached. */
printf("Unexpected error in _stat.\n");
}
return -;
}
else
{
// Output some of the statistics:
printf( "File size : %ld\n", buf.st_size );
printf( "Drive : %c:\n", buf.st_dev + 'A' ); time_t t;
tzset(); /*tzset()*/
t = time(NULL);
if((t - buf.st_mtime) > )//604800是7天的秒数，下面是删除超过7天的文件
{
remove(filename);
printf("remove file : %s \n" ,filename);
}
return ;
} } //遍历子目录和目录中的文件
static int find_directory(const char *dirname)
{
DIR *dir;
char buffer[PATH_MAX + ];
char *p = buffer;
const char *src;
char *end = &buffer[PATH_MAX];
int result; //返回结果 //copy目录名到buffer
src = dirname;
while (p < end && *src != '\0') {
*p++ = *src++;
}
*p = '\0'; //打开目录
dir = opendir (dirname);
if (dir != NULL) {
struct dirent *ent; while ((ent = readdir (dir)) != NULL) {//这里返回的是当前目录.
char *q = p;
char c; //获得目录的最后一个字符
if (buffer < q) {
c = q[-];
} else {
c = ':';
} //在当前给出的目录下加上/
if (c != ':' && c != '/' && c != '\\') {
*q++ = '/';
} //把文件名附加在后面
src = ent->d_name; //src 为根目录.
while (q < end && *src != '\0') {
*q++ = *src++;
}
*q = '\0'; //根据是否是文件还是目录来选择操作
switch (ent->d_type) {
case DT_LNK:
case DT_REG:
//如果是文件
printf ("%s\n", buffer);
RemoveFile(buffer);
break; case DT_DIR:
//如果是目录
if (strcmp (ent->d_name, ".") !=
&& strcmp (ent->d_name, "..") != ) {
find_directory (buffer);
}
break; default:
/* Ignore device entries */
/*NOP*/;
} } closedir (dir);
result = ; } else {
//目录打不开
printf ("Cannot open directory %s\n", dirname);
result = -;
} return result;
}
dirent.h文件代码如下：
/*
* dirent.h - dirent API for Microsoft Visual Studio
*
* Copyright (C) 2006-2012 Toni Ronkko
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* ``Software''), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL TONI RONKKO BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* $Id: dirent.h,v 1.20 2014/03/19 17:52:23 tronkko Exp $
*/
#ifndef DIRENT_H
#define DIRENT_H /*
* Define architecture flags so we don't need to include windows.h.
* Avoiding windows.h makes it simpler to use windows sockets in conjunction
* with dirent.h.
*/
#if !defined(_68K_) && !defined(_MPPC_) && !defined(_X86_) && !defined(_IA64_) && !defined(_AMD64_) && defined(_M_IX86)
# define _X86_
#endif
#if !defined(_68K_) && !defined(_MPPC_) && !defined(_X86_) && !defined(_IA64_) && !defined(_AMD64_) && defined(_M_AMD64)
#define _AMD64_
#endif #include <stdio.h>
#include <stdarg.h>
#include <windef.h>
#include <winbase.h>
#include <wchar.h>
#include <string.h>
#include <stdlib.h>
#include <malloc.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h> /* Indicates that d_type field is available in dirent structure */
#define _DIRENT_HAVE_D_TYPE /* Indicates that d_namlen field is available in dirent structure */
#define _DIRENT_HAVE_D_NAMLEN /* Entries missing from MSVC 6.0 */
#if !defined(FILE_ATTRIBUTE_DEVICE)
# define FILE_ATTRIBUTE_DEVICE 0x40
#endif /* File type and permission flags for stat() */
#if !defined(S_IFMT)
# define S_IFMT _S_IFMT /* File type mask */
#endif
#if !defined(S_IFDIR)
# define S_IFDIR _S_IFDIR /* Directory */
#endif
#if !defined(S_IFCHR)
# define S_IFCHR _S_IFCHR /* Character device */
#endif
#if !defined(S_IFFIFO)
# define S_IFFIFO _S_IFFIFO /* Pipe */
#endif
#if !defined(S_IFREG)
# define S_IFREG _S_IFREG /* Regular file */
#endif
#if !defined(S_IREAD)
# define S_IREAD _S_IREAD /* Read permission */
#endif
#if !defined(S_IWRITE)
# define S_IWRITE _S_IWRITE /* Write permission */
#endif
#if !defined(S_IEXEC)
# define S_IEXEC _S_IEXEC /* Execute permission */
#endif
#if !defined(S_IFIFO)
# define S_IFIFO _S_IFIFO /* Pipe */
#endif
#if !defined(S_IFBLK)
# define S_IFBLK /* Block device */
#endif
#if !defined(S_IFLNK)
# define S_IFLNK /* Link */
#endif
#if !defined(S_IFSOCK)
# define S_IFSOCK /* Socket */
#endif #if defined(_MSC_VER)
# define S_IRUSR S_IREAD /* Read user */
# define S_IWUSR S_IWRITE /* Write user */
# define S_IXUSR /* Execute user */
# define S_IRGRP /* Read group */
# define S_IWGRP /* Write group */
# define S_IXGRP /* Execute group */
# define S_IROTH /* Read others */
# define S_IWOTH /* Write others */
# define S_IXOTH /* Execute others */
#endif /* Maximum length of file name */
#if !defined(PATH_MAX)
# define PATH_MAX MAX_PATH
#endif
#if !defined(FILENAME_MAX)
# define FILENAME_MAX MAX_PATH
#endif
#if !defined(NAME_MAX)
# define NAME_MAX FILENAME_MAX
#endif /* File type flags for d_type */
#define DT_UNKNOWN 0
#define DT_REG S_IFREG
#define DT_DIR S_IFDIR
#define DT_FIFO S_IFIFO
#define DT_SOCK S_IFSOCK
#define DT_CHR S_IFCHR
#define DT_BLK S_IFBLK
#define DT_LNK S_IFLNK /* Macros for converting between st_mode and d_type */
#define IFTODT(mode) ((mode) & S_IFMT)
#define DTTOIF(type) (type) /*
* File type macros. Note that block devices, sockets and links cannot be
* distinguished on Windows and the macros S_ISBLK, S_ISSOCK and S_ISLNK are
* only defined for compatibility. These macros should always return false
* on Windows.
*/
#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK) /* Return the exact length of d_namlen without zero terminator */
#define _D_EXACT_NAMLEN(p) ((p)->d_namlen) /* Return number of bytes needed to store d_namlen */
#define _D_ALLOC_NAMLEN(p) (PATH_MAX) #ifdef __cplusplus
extern "C" {
#endif /* Wide-character version */
struct _wdirent {
long d_ino; /* Always zero */
unsigned short d_reclen; /* Structure size */
size_t d_namlen; /* Length of name without \0 */
int d_type; /* File type */
wchar_t d_name[PATH_MAX]; /* File name */
};
typedef struct _wdirent _wdirent; struct _WDIR {
struct _wdirent ent; /* Current directory entry */
WIN32_FIND_DATAW data; /* Private file data */
int cached; /* True if data is valid */
HANDLE handle; /* Win32 search handle */
wchar_t *patt; /* Initial directory name */
};
typedef struct _WDIR _WDIR; static _WDIR *_wopendir (const wchar_t *dirname);
static struct _wdirent *_wreaddir (_WDIR *dirp);
static int _wclosedir (_WDIR *dirp);
static void _wrewinddir (_WDIR* dirp); /* For compatibility with Symbian */
#define wdirent _wdirent
#define WDIR _WDIR
#define wopendir _wopendir
#define wreaddir _wreaddir
#define wclosedir _wclosedir
#define wrewinddir _wrewinddir /* Multi-byte character versions */
struct dirent {
long d_ino; /* Always zero */
unsigned short d_reclen; /* Structure size */
size_t d_namlen; /* Length of name without \0 */
int d_type; /* File type */
char d_name[PATH_MAX]; /* File name */
};
typedef struct dirent dirent; struct DIR {
struct dirent ent;
struct _WDIR *wdirp;
};
typedef struct DIR DIR; static DIR *opendir (const char *dirname);
static struct dirent *readdir (DIR *dirp);
static int closedir (DIR *dirp);
static void rewinddir (DIR* dirp); /* Internal utility functions */
static WIN32_FIND_DATAW *dirent_first (_WDIR *dirp);
static WIN32_FIND_DATAW *dirent_next (_WDIR *dirp); static int dirent_mbstowcs_s(
size_t *pReturnValue,
wchar_t *wcstr,
size_t sizeInWords,
const char *mbstr,
size_t count); static int dirent_wcstombs_s(
size_t *pReturnValue,
char *mbstr,
size_t sizeInBytes,
const wchar_t *wcstr,
size_t count); static void dirent_set_errno (int error); /*
* Open directory stream DIRNAME for read and return a pointer to the
* internal working area that is used to retrieve individual directory
* entries.
*/
static _WDIR*
_wopendir(
const wchar_t *dirname)
{
_WDIR *dirp = NULL;
int error; /* Must have directory name */
if (dirname == NULL || dirname[] == '\0') {
dirent_set_errno (ENOENT);
return NULL;
} /* Allocate new _WDIR structure */
dirp = (_WDIR*) malloc (sizeof (struct _WDIR));
if (dirp != NULL) {
DWORD n; /* Reset _WDIR structure */
dirp->handle = INVALID_HANDLE_VALUE;
dirp->patt = NULL;
dirp->cached = ; /* Compute the length of full path plus zero terminator */
n = GetFullPathNameW (dirname, , NULL, NULL); /* Allocate room for absolute directory name and search pattern */
dirp->patt = (wchar_t*) malloc (sizeof (wchar_t) * n + );
if (dirp->patt) { /*
* Convert relative directory name to an absolute one. This
* allows rewinddir() to function correctly even when current
* working directory is changed between opendir() and rewinddir().
*/
n = GetFullPathNameW (dirname, n, dirp->patt, NULL);
if (n > ) {
wchar_t *p; /* Append search pattern \* to the directory name */
p = dirp->patt + n;
if (dirp->patt < p) {
switch (p[-]) {
case '\\':
case '/':
case ':':
/* Directory ends in path separator, e.g. c:\temp\ */
/*NOP*/;
break; default:
/* Directory name doesn't end in path separator */
*p++ = '\\';
}
}
*p++ = '*';
*p = '\0'; /* Open directory stream and retrieve the first entry */
if (dirent_first (dirp)) {
/* Directory stream opened successfully */
error = ;
} else {
/* Cannot retrieve first entry */
error = ;
dirent_set_errno (ENOENT);
} } else {
/* Cannot retrieve full path name */
dirent_set_errno (ENOENT);
error = ;
} } else {
/* Cannot allocate memory for search pattern */
error = ;
} } else {
/* Cannot allocate _WDIR structure */
error = ;
} /* Clean up in case of error */
if (error && dirp) {
_wclosedir (dirp);
dirp = NULL;
} return dirp;
} /*
* Read next directory entry. The directory entry is returned in dirent
* structure in the d_name field. Individual directory entries returned by
* this function include regular files, sub-directories, pseudo-directories
* "." and ".." as well as volume labels, hidden files and system files.
*/
static struct _wdirent*
_wreaddir(
_WDIR *dirp)
{
WIN32_FIND_DATAW *datap;
struct _wdirent *entp; /* Read next directory entry */
datap = dirent_next (dirp);
if (datap) {
size_t n;
DWORD attr; /* Pointer to directory entry to return */
entp = &dirp->ent; /*
* Copy file name as wide-character string. If the file name is too
* long to fit in to the destination buffer, then truncate file name
* to PATH_MAX characters and zero-terminate the buffer.
*/
n = ;
while (n + < PATH_MAX && datap->cFileName[n] != ) {
entp->d_name[n] = datap->cFileName[n];
n++;
}
dirp->ent.d_name[n] = ; /* Length of file name excluding zero terminator */
entp->d_namlen = n; /* File type */
attr = datap->dwFileAttributes;
if ((attr & FILE_ATTRIBUTE_DEVICE) != ) {
entp->d_type = DT_CHR;
} else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != ) {
entp->d_type = DT_DIR;
} else {
entp->d_type = DT_REG;
} /* Reset dummy fields */
entp->d_ino = ;
entp->d_reclen = sizeof (struct _wdirent); } else { /* Last directory entry read */
entp = NULL; } return entp;
} /*
* Close directory stream opened by opendir() function. This invalidates the
* DIR structure as well as any directory entry read previously by
* _wreaddir().
*/
static int
_wclosedir(
_WDIR *dirp)
{
int ok;
if (dirp) { /* Release search handle */
if (dirp->handle != INVALID_HANDLE_VALUE) {
FindClose (dirp->handle);
dirp->handle = INVALID_HANDLE_VALUE;
} /* Release search pattern */
if (dirp->patt) {
free (dirp->patt);
dirp->patt = NULL;
} /* Release directory structure */
free (dirp);
ok = /*success*/; } else {
/* Invalid directory stream */
dirent_set_errno (EBADF);
ok = /*failure*/-;
}
return ok;
} /*
* Rewind directory stream such that _wreaddir() returns the very first
* file name again.
*/
static void
_wrewinddir(
_WDIR* dirp)
{
if (dirp) {
/* Release existing search handle */
if (dirp->handle != INVALID_HANDLE_VALUE) {
FindClose (dirp->handle);
} /* Open new search handle */
dirent_first (dirp);
}
} /* Get first directory entry (internal) */
static WIN32_FIND_DATAW*
dirent_first(
_WDIR *dirp)
{
WIN32_FIND_DATAW *datap; /* Open directory and retrieve the first entry */
dirp->handle = FindFirstFileW (dirp->patt, &dirp->data);
if (dirp->handle != INVALID_HANDLE_VALUE) { /* a directory entry is now waiting in memory */
datap = &dirp->data;
dirp->cached = ; } else { /* Failed to re-open directory: no directory entry in memory */
dirp->cached = ;
datap = NULL; }
return datap;
} /* Get next directory entry (internal) */
static WIN32_FIND_DATAW*
dirent_next(
_WDIR *dirp)
{
WIN32_FIND_DATAW *p; /* Get next directory entry */
if (dirp->cached != ) { /* A valid directory entry already in memory */
p = &dirp->data;
dirp->cached = ; } else if (dirp->handle != INVALID_HANDLE_VALUE) { /* Get the next directory entry from stream */
if (FindNextFileW (dirp->handle, &dirp->data) != FALSE) {
/* Got a file */
p = &dirp->data;
} else {
/* The very last entry has been processed or an error occured */
FindClose (dirp->handle);
dirp->handle = INVALID_HANDLE_VALUE;
p = NULL;
} } else { /* End of directory stream reached */
p = NULL; } return p;
} /*
* Open directory stream using plain old C-string.
*/
static DIR*
opendir(
const char *dirname)
{
struct DIR *dirp;
int error; /* Must have directory name */
if (dirname == NULL || dirname[] == '\0') {
dirent_set_errno (ENOENT);
return NULL;
} /* Allocate memory for DIR structure */
dirp = (DIR*) malloc (sizeof (struct DIR));
if (dirp) {
wchar_t wname[PATH_MAX];
size_t n; /* Convert directory name to wide-character string */
error = dirent_mbstowcs_s (&n, wname, PATH_MAX, dirname, PATH_MAX);
if (!error) { /* Open directory stream using wide-character name */
dirp->wdirp = _wopendir (wname);
if (dirp->wdirp) {
/* Directory stream opened */
error = ;
} else {
/* Failed to open directory stream */
error = ;
} } else {
/*
* Cannot convert file name to wide-character string. This
* occurs if the string contains invalid multi-byte sequences or
* the output buffer is too small to contain the resulting
* string.
*/
error = ;
} } else {
/* Cannot allocate DIR structure */
error = ;
} /* Clean up in case of error */
if (error && dirp) {
free (dirp);
dirp = NULL;
} return dirp;
} /*
* Read next directory entry.
*
* When working with text consoles, please note that file names returned by
* readdir() are represented in the default ANSI code page while any output to
* console is typically formatted on another code page. Thus, non-ASCII
* characters in file names will not usually display correctly on console. The
* problem can be fixed in two ways: (1) change the character set of console
* to 1252 using chcp utility and use Lucida Console font, or (2) use
* _cprintf function when writing to console. The _cprinf() will re-encode
* ANSI strings to the console code page so many non-ASCII characters will
* display correcly.
*/
static struct dirent*
readdir(
DIR *dirp)
{
WIN32_FIND_DATAW *datap;
struct dirent *entp; /* Read next directory entry */
datap = dirent_next (dirp->wdirp);
if (datap) {
size_t n;
int error; /* Attempt to convert file name to multi-byte string */
error = dirent_wcstombs_s(
&n, dirp->ent.d_name, PATH_MAX, datap->cFileName, PATH_MAX); /*
* If the file name cannot be represented by a multi-byte string,
* then attempt to use old 8+3 file name. This allows traditional
* Unix-code to access some file names despite of unicode
* characters, although file names may seem unfamiliar to the user.
*
* Be ware that the code below cannot come up with a short file
* name unless the file system provides one. At least
* VirtualBox shared folders fail to do this.
*/
if (error && datap->cAlternateFileName[] != '\0') {
error = dirent_wcstombs_s(
&n, dirp->ent.d_name, PATH_MAX,
datap->cAlternateFileName, PATH_MAX);
} if (!error) {
DWORD attr; /* Initialize directory entry for return */
entp = &dirp->ent; /* Length of file name excluding zero terminator */
entp->d_namlen = n - ; /* File attributes */
attr = datap->dwFileAttributes;
if ((attr & FILE_ATTRIBUTE_DEVICE) != ) {
entp->d_type = DT_CHR;
} else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != ) {
entp->d_type = DT_DIR;
} else {
entp->d_type = DT_REG;
} /* Reset dummy fields */
entp->d_ino = ;
entp->d_reclen = sizeof (struct dirent); } else {
/*
* Cannot convert file name to multi-byte string so construct
* an errornous directory entry and return that. Note that
* we cannot return NULL as that would stop the processing
* of directory entries completely.
*/
entp = &dirp->ent;
entp->d_name[] = '?';
entp->d_name[] = '\0';
entp->d_namlen = ;
entp->d_type = DT_UNKNOWN;
entp->d_ino = ;
entp->d_reclen = ;
} } else {
/* No more directory entries */
entp = NULL;
} return entp;
} /*
* Close directory stream.
*/
static int
closedir(
DIR *dirp)
{
int ok;
if (dirp) { /* Close wide-character directory stream */
ok = _wclosedir (dirp->wdirp);
dirp->wdirp = NULL; /* Release multi-byte character version */
free (dirp); } else { /* Invalid directory stream */
dirent_set_errno (EBADF);
ok = /*failure*/-; }
return ok;
} /*
* Rewind directory stream to beginning.
*/
static void
rewinddir(
DIR* dirp)
{
/* Rewind wide-character string directory stream */
_wrewinddir (dirp->wdirp);
} /* Convert multi-byte string to wide character string */
static int
dirent_mbstowcs_s(
size_t *pReturnValue,
wchar_t *wcstr,
size_t sizeInWords,
const char *mbstr,
size_t count)
{
int error; #if defined(_MSC_VER) && _MSC_VER >= 1400 /* Microsoft Visual Studio 2005 or later */
error = mbstowcs_s (pReturnValue, wcstr, sizeInWords, mbstr, count); #else /* Older Visual Studio or non-Microsoft compiler */
size_t n; /* Convert to wide-character string (or count characters) */
n = mbstowcs (wcstr, mbstr, sizeInWords);
if (!wcstr || n < count) { /* Zero-terminate output buffer */
if (wcstr && sizeInWords) {
if (n >= sizeInWords) {
n = sizeInWords - ;
}
wcstr[n] = ;
} /* Length of resuting multi-byte string WITH zero terminator */
if (pReturnValue) {
*pReturnValue = n + ;
} /* Success */
error = ; } else { /* Could not convert string */
error = ; } #endif return error;
} /* Convert wide-character string to multi-byte string */
static int
dirent_wcstombs_s(
size_t *pReturnValue,
char *mbstr,
size_t sizeInBytes, /* max size of mbstr */
const wchar_t *wcstr,
size_t count)
{
int error; #if defined(_MSC_VER) && _MSC_VER >= 1400 /* Microsoft Visual Studio 2005 or later */
error = wcstombs_s (pReturnValue, mbstr, sizeInBytes, wcstr, count); #else /* Older Visual Studio or non-Microsoft compiler */
size_t n; /* Convert to multi-byte string (or count the number of bytes needed) */
n = wcstombs (mbstr, wcstr, sizeInBytes);
if (!mbstr || n < count) { /* Zero-terminate output buffer */
if (mbstr && sizeInBytes) {
if (n >= sizeInBytes) {
n = sizeInBytes - ;
}
mbstr[n] = '\0';
} /* Lenght of resulting multi-bytes string WITH zero-terminator */
if (pReturnValue) {
*pReturnValue = n + ;
} /* Success */
error = ; } else { /* Cannot convert string */
error = ; } #endif return error;
} /* Set errno variable */
static void
dirent_set_errno(
int error)
{
#if defined(_MSC_VER) && _MSC_VER >= 1400 /* Microsoft Visual Studio 2005 and later */
_set_errno (error); #else /* Non-Microsoft compiler or older Microsoft compiler */
errno = error; #endif
} #ifdef __cplusplus
}
#endif
#endif /*DIRENT_H*/
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