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1¡¢sysinfoÓ÷¨
#include <sys/sysinfo.h>
int sysinfo(struct sysinfo info);
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struct sysinfo {
    long uptime;             /* Seconds since boot */
    unsigned long loads[3];  /* 1, 5, and 15 minute load averages */
    unsigned long totalram;  /* Total usable main memory size */
    unsigned long freeram;   /* Available memory size */
    unsigned long sharedram; /* Amount of shared memory */
    unsigned long bufferram; /* Memory used by buffers */
    unsigned long totalswap; /* Total swap space size */
    unsigned long freeswap;  /* swap space still available */
    unsigned short procs;    /* Number of current processes */
    unsigned long totalhigh; /* Total high memory size */
    unsigned long freehigh;  /* Available high memory size */
    unsigned int mem_unit;   /* Memory unit size in bytes */
    char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding for libc5 */
};
2¡¢statfsÓ÷¨
#include <sys/vfs.h>
int statfs(const char *path, struct statfs *buf);
int fstatfs(int fd, struct statfs *buf);
struct statfs{
   long f_type; ¡¢/*ÎļþϵͳÀàÐÍ*/
   long f_bsize;   /*¾­¹ýÓÅ»¯µÄ´«Êä¿é´óС*/
   long f_blocks; /*ÎļþϵͳÊý¾Ý¿é×ÜÊý*/
   long f_bfree; /*Îļþϵͳ¿ÕÏпé*/
   long f_bavail; /*·Ç³¬¼¶Óû§¿ÉÒÔÓõĿéÊý*/
   long f_files;   /*Îļþ½Úµã×ÜÊý*/
   long f_ffree; /*¿ÕÏÐÎļþ½Úµã×ÜÊý*/
   fsid_t f_fsid; /*Îļþϵͳ±êʶ*/
   long f_namelen; /*ÎļþÃûµÄ×î´ó³¤¶È*/
};