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sysinfo ? returns information on overall system statistics |
#include <linux/kernel.h> int sysinfo(struct sysinfo *info); |
sysinfo returns information in the following structure: |
struct sysinfo { |
long uptime; /* Seconds since boot */ |
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unsigned long loads[3]; /* 1, 5, and 15 minute load averages */ |
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unsigned long totalram; /* Total usable main memory size */ |
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unsigned long freeram; /* Available memory size */ |
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unsigned long sharedram; /* Amount of shared memory */ |
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unsigned long bufferram; /* Memory used by buffers */ |
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unsigned long totalswap; /* Total swap space size */ |
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unsigned long freeswap; /* swap space still available */ |
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unsigned short procs; /* Number of current processes */ |
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char _f[22]; /* Pads structure to 64 bytes */ |
}; |
sysinfo provides a simple way of getting overall system statistics. This is more portable than reading /dev/kmem. For an example of its use, see intro(2). |
On success, zero is returned. On error, ?1 is returned, and errno is set appropriately. |
EFAULT |
pointer to struct sysinfo is invalid |
This function is Linux-specific, and should not be used in programs intended to be portable. The Linux kernel has a sysinfo system call since 0.98.pl6. Linux libc contains a sysinfo() routine since 5.3.5, and glibc has one since 1.90. |