Ftruncate sizes the file to region_size bytes, which was previously set to the system's standard page size.
ftruncate把文件的大小设置为region_size字节,这以前设置为系统的标准页面大小。
Ftruncate sizes the file to region_size bytes, which was previously set to the system's standard page size.
ftruncate把文件的大小设置为region_size字节,这以前设置为系统的标准页面大小。
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