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Check caller's euid and egid when accessing /dev/mem on FreeBSD.

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This commit is contained in:
Siavash Safi 2015-05-20 12:22:00 +04:30
parent 6ef3b7a4e8
commit a10ab2c102
1 changed files with 5 additions and 0 deletions
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5
collector/cpu_freebsd.go
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@ -4,6 +4,7 @@ package collector
import ( import (
"errors" "errors"
"os"
"strconv" "strconv"
"unsafe" "unsafe"
@ -49,6 +50,10 @@ func NewStatCollector(config Config) (Collector, error) {
// Expose cpu stats using kvm // Expose cpu stats using kvm
func (c *statCollector) Update(ch chan<- prometheus.Metric) (err error) { func (c *statCollector) Update(ch chan<- prometheus.Metric) (err error) {
if os.Geteuid() != 0 && os.Getegid() != 2 {
return errors.New("Caller should be either root user or kmem group to access /dev/mem")
}
var errbuf *C.char var errbuf *C.char
kd := C.kvm_open(nil, nil, nil, C.O_RDONLY, errbuf) kd := C.kvm_open(nil, nil, nil, C.O_RDONLY, errbuf)
if errbuf != nil { if errbuf != nil {