be83c11fb0
Signed-off-by: Daniel Nephin <dnephin@docker.com> Upstream-commit: 4f0d95fa6ee7f865597c03b9e63702cdcb0f7067 Component: engine
19 lines
429 B
Go
19 lines
429 B
Go
package dmesg // import "github.com/docker/docker/pkg/dmesg"
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import (
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"unsafe"
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"golang.org/x/sys/unix"
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)
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// Dmesg returns last messages from the kernel log, up to size bytes
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func Dmesg(size int) []byte {
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t := uintptr(3) // SYSLOG_ACTION_READ_ALL
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b := make([]byte, size)
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amt, _, err := unix.Syscall(unix.SYS_SYSLOG, t, uintptr(unsafe.Pointer(&b[0])), uintptr(len(b)))
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if err != 0 {
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return []byte{}
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}
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return b[:amt]
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}
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