#include <unistd.h>
int getdtablesize(void);
描述
getdtablesize() 返回檔案的最大數量進程可以開啟的,比一個檔案描述符的最大可能值多一個。
返回值
當前限制在每個進程開啟的檔案數。
注意
getdtablesize() is implemented as a libc library function. The glibc version callsgetrlimit(2) and returns the current RLIMIT_NOFILE limit, or OPEN_MAX when that fails. The libc4 and libc5 versions return OPEN_MAX (set to 256 since Linux 0.98.4).
遵循於
SVr4, 4.4BSD (the getdtablesize() function first appeared in 4.2BSD).
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