GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
RedHat 5.2(Apollo) |
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sysinfo(2) |
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sysinfo − returns information on overall system statistics
#include
<linux/kernel.h>
#include <linux/sys.h>
int sysinfo(struct sysinfo *info);
sysinfo returns information in the following structure:
struct sysinfo {
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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.
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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.
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sysinfo(2) | |