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How to get the flash partition size in linux? in view of this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

In the embedded system, due to the limited storage space of flash or the storage of data, to achieve cyclic deletion of data, you need to obtain the usage of the partition, which can be obtained through the function statfs under the system. The implementation code is as follows:

FlashInfo.cpp

# include # include typedef unsigned long long U64; / / unit: 0-MBytes, 1-KBytes, default MBytesint getPartitionUse (const char * dir, size_t & totleSize, size_t & freeSize, int unit) {struct statfs diskInfo; int ret = statfs (dir, & diskInfo) If (ret! = 0) {perror ("getPartitionUse statfs error"); return ret;} U64 allBlocks = diskInfo.f_bsize; U64 tmpTotalSize = allBlocks * diskInfo.f_blocks; U64 tmpFreeDisk = diskInfo.f_bfree*allBlocks; totleSize = tmpTotalSize > > 20; freeSize = tmpFreeDisk > > 20; if (unit = = 0) {totleSize = tmpTotalSize > > 20; freeSize = tmpFreeDisk > > 20;} else if (unit = = 1) {totleSize = tmpTotalSize > > 10; freeSize = tmpFreeDisk > 10 } return 0;} int main () {size_t totleSize = 0; size_t freeSize = 0; getPartitionUse ("/", totleSize,freeSize, 0); printf ("system total=%dMB, free=%dMB\ n", totleSize,freeSize); getPartitionUse ("/ work/data", totleSize,freeSize, 0); printf ("data total=%dMB, free=%dMB\ n", totleSize,freeSize); getPartitionUse ("/ work", totleSize,freeSize, 0) Printf ("config total=%dMB, free=%dMB\ n", totleSize, freeSize)

}

Compile:

Mipsel-linux-g++ flashInfo.c-o flashInfo

The running results are as follows:

This is the answer to the question about how to get the flash partition size in linux. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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