27 lines
786 B
Go
27 lines
786 B
Go
package system
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import (
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"io/ioutil"
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"path/filepath"
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"strconv"
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"strings"
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)
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// look in /proc to find the process start time so that we can verify
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// that this pid has started after ourself
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func GetProcessStartTime(pid int) (string, error) {
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data, err := ioutil.ReadFile(filepath.Join("/proc", strconv.Itoa(pid), "stat"))
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if err != nil {
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return "", err
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}
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parts := strings.Split(string(data), " ")
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// the starttime is located at pos 22
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// from the man page
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//
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// starttime %llu (was %lu before Linux 2.6)
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// (22) The time the process started after system boot. In kernels before Linux 2.6, this
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// value was expressed in jiffies. Since Linux 2.6, the value is expressed in clock ticks
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// (divide by sysconf(_SC_CLK_TCK)).
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return parts[22-1], nil // starts at 1
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}
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