1 #include <dirent.h> 2 #include <errno.h> 3 #include <stddef.h> 4 #include "__dirent.h" 5 #include "syscall.h" 6 #ifndef __LITEOS__ 7 #include "param_check.h" 8 #endif 9 10 typedef char dirstream_buf_alignment_check[1-2*(int)( 11 offsetof(struct __dirstream, buf) % sizeof(off_t))]; 12 readdir(DIR * dir)13struct dirent *readdir(DIR *dir) 14 { 15 #ifndef __LITEOS__ 16 PARAM_CHECK(dir); 17 #endif 18 struct dirent *de; 19 20 if (dir->buf_pos >= dir->buf_end) { 21 int len = __syscall(SYS_getdents, dir->fd, dir->buf, sizeof dir->buf); 22 if (len <= 0) { 23 if (len < 0 && len != -ENOENT) errno = -len; 24 return 0; 25 } 26 dir->buf_end = len; 27 dir->buf_pos = 0; 28 } 29 de = (void *)(dir->buf + dir->buf_pos); 30 dir->buf_pos += de->d_reclen; 31 dir->tell = de->d_off; 32 return de; 33 } 34 35 weak_alias(readdir, readdir64); 36