shm.h 537 字节
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#define SHMLBA 4096

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struct shmid_ds {
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	struct ipc_perm shm_perm;
	int __unused1;
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	time_t shm_atime;
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	int __unused2;
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	time_t shm_dtime;
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	int __unused3;
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	time_t shm_ctime;
	int __unused4;
	size_t shm_segsz;
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	pid_t shm_cpid;
	pid_t shm_lpid;
	unsigned long shm_nattch;
	unsigned long __pad1;
	unsigned long __pad2;
};
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struct shminfo {
	unsigned long shmmax, shmmin, shmmni, shmseg, shmall, __unused[4];
};

struct shm_info {
	int __used_ids;
	unsigned long shm_tot, shm_rss, shm_swp;
	unsigned long __swap_attempts, __swap_successes;
};