QT/C++ 获取磁盘信息/簇大小、块大小、st_blksize、blockSize

在优化传输计算的过程中,需要获取磁盘块的大小。原本计划借助windows.h实现,但遇到未知错误导致崩溃。解决方案是利用QT的QStorageInfo类,通过调用blockSize()方法,传入Qstring路径即可轻松获取。详细信息可查阅QT手册。

最近有一个需求,为了优化传输计算,需要获取当前磁盘块的块大小。
之前网上查询了一下是用windows.h做的,但在我的环境下莫名随机崩溃。
遂发现QT自己有一个QStorageInfo,提供了一个blockSize();

直接传入一个Qstring path即可,具体文档可以查阅QT手册

https://doc.qt.io/qt-5/qstorageinfo.html
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在这里插入图片描述

struct stat { __dev_t st_dev; /* Device. */ #ifndef __x86_64__ unsigned short int __pad1; #endif #if defined __x86_64__ || !defined __USE_FILE_OFFSET64 __ino_t st_ino; /* File serial number. */ #else __ino_t __st_ino; /* 32bit file serial number. */ #endif #ifndef __x86_64__ __mode_t st_mode; /* File mode. */ __nlink_t st_nlink; /* Link count. */ #else __nlink_t st_nlink; /* Link count. */ __mode_t st_mode; /* File mode. */ #endif __uid_t st_uid; /* User ID of the file's owner. */ __gid_t st_gid; /* Group ID of the file's group.*/ #ifdef __x86_64__ int __pad0; #endif __dev_t st_rdev; /* Device number, if device. */ #ifndef __x86_64__ unsigned short int __pad2; #endif #if defined __x86_64__ || !defined __USE_FILE_OFFSET64 __off_t st_size; /* Size of file, in bytes. */ #else __off64_t st_size; /* Size of file, in bytes. */ #endif __blksize_t st_blksize; /* Optimal block size for I/O. */ #if defined __x86_64__ || !defined __USE_FILE_OFFSET64 __blkcnt_t st_blocks; /* Number 512-byte blocks allocated. */ #else __blkcnt64_t st_blocks; /* Number 512-byte blocks allocated. */ #endif #ifdef __USE_XOPEN2K8 /* Nanosecond resolution timestamps are stored in a format equivalent to 'struct timespec'. This is the type used whenever possible but the Unix namespace rules do not allow the identifier 'timespec' to appear in the <sys/stat.h> header. Therefore we have to handle the use of this header in strictly standard-compliant sources special. */ struct timespec st_atim; /* Time of last access. */ struct timespec st_mtim; /* Time of last modification. */ struct timespec st_ctim; /* Time of last status change. */ # define st_atime st_atim.tv_sec /* Backward compatibility. */ # define st_mtime st_mtim.tv_sec # define st_ctime st_ctim.tv_sec #else __time_t st_atime; /* Time of last access. */ __syscall_ulong_t st_atimensec; /* Nscecs of last access. */ __time_t st_mtime; /* Time of last modification. */ __syscall_ulong_t st_mtimensec; /* Nsecs of last modification. */ __time_t st_ctime; /* Time of last status change. */ __syscall_ulong_t st_ctimensec; /* Nsecs of last status change. */ #endif #ifdef __x86_64__ __syscall_slong_t __glibc_reserved[3]; #else # ifndef __USE_FILE_OFFSET64 unsigned long int __glibc_reserved4; unsigned long int __glibc_reserved5; # else __ino64_t st_ino; /* File serial number. */ # endif #endif };
最新发布
11-05
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