頭文件： #include <unistd.h>

原型：long sysconf(int sysnum);

示例：

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

int main() {

printf("Size of a page in bytes:%ld\n",sysconf(_SC_PAGESIZE));

printf("Max length of a hostname:%ld\n",sysconf(_SC_HOST_NAME_MAX));

printf(" The maximum number of files that a process can have open at any time.:%ld\n",sysconf(_SC_OPEN_MAX));

printf(" The number of clock ticks per second.:%ld\n",sysconf(_SC_CLK_TCK));

printf("The number of processors currently online .:%ld\n",sysconf(_SC_NPROCESSORS_ONLN)); printf("The number of processors configured..:%ld\n",sysconf(_SC_NPROCESSORS_CONF));

return 0;

}

sysconf獲取系統參數