原文地址：https://blog.csdn.net/sin0803/article/details/37539313
1.包含头文件
#include <dirent.h>
2.struct dirent结构
1 struct dirent 2 { 3 long d_ino; /* inode number 索引节点号 */ 4 off_t d_off; /* offset to this dirent 在目录文件中的偏移 */ 5 unsigned short d_reclen; /* length of this d_name 文件名长 */ 6 unsigned char d_type; /* the type of d_name 文件类型 */ 7 char d_name [NAME_MAX+1]; /* file name (null-terminated) 文件名，最长255字符 */ 8 }
3.DIR结构
1 struct __dirstream 2 { 3 void *__fd; /* `struct hurd_fd' pointer for descriptor. */ 4 char *__data; /* Directory block. */ 5 int __entry_data; /* Entry number `__data' corresponds to. */ 6 char *__ptr; /* Current pointer into the block. */ 7 int __entry_ptr; /* Entry number `__ptr' corresponds to. */ 8 size_t __allocation; /* Space allocated for the block. */ 9 size_t __size; /* Total valid data in the block. */ 10 __libc_lock_define (, __lock) /* Mutex lock for this structure. */ 11 }; 12 13 typedef struct __dirstream DIR;
4.例子
1 #define FILETXTCNT 100 //文件数量 2 #define FILENAMELEN 64 //文件名称 3 4 //存放要解析的基因文件名称 5 char g_cFileList[FILETXTCNT][FILENAMELEN]; //最多100个文件，每个文件名64字节 6 7 int GetGeneFile(const char *_pcDir) 8 { 9 int iFileCnt = 0; 10 DIR *dirptr = NULL; 11 struct dirent *dirp; 12 char cFileTmp[64] = { 0}; 13 14 if((dirptr = opendir(_pcDir)) == NULL)//打开一个目录 15 { 16 return 0; 17 } 18 while ((dirp = readdir(dirptr)) != NULL) 19 { 20 memset(cFileTmp, 0, 64); 21 if ((0 == strncasecmp(dirp->d_name, ".", 1)) || (0 != strcmp(strchr(dirp->d_name, '.'), ".txt")))//过滤掉这个文件 22 { 23 continue; 24 } 25 26 sprintf(cFileTmp, "%s/%s", _pcDir, dirp->d_name); 27 strcpy(g_cFileList[iFileCnt], cFileTmp); 28 iFileCnt++; 29 } 30 closedir(dirptr); 31 32 return iFileCnt; 33 }