restore the files after garbage collectionv0.5.5

    hopefully this actually is a valid git repo

1 files changed, 141 insertions, 0 deletions

diff --git a/hostname.go b/hostname.go
new file mode 100644
index 0000000..c36541a
--- /dev/null
+++ b/hostname.go
@@ -0,0 +1,141 @@
+// figures out if your hostname is valid
+// then checks if your DNS is setup correctly
+package linuxstatus
+
+import (
+	"io/ioutil"
+	"go.wit.com/log"
+
+	// will try to get this hosts FQDN
+	"github.com/Showmax/go-fqdn"
+)
+
+func (ls *LinuxStatus) GetDomainName() string {
+	if ! me.Ready() {return ""}
+	return me.domainname.Get()
+}
+
+func (ls *LinuxStatus) setDomainName() {
+	if ! me.Ready() {return}
+
+	dn := run("domainname")
+	if (me.domainname.Get() != dn) {
+		log.Log(CHANGE, "domainname has changed from", me.GetDomainName(), "to", dn)
+		me.domainname.Set(dn)
+		me.changed = true
+	}
+}
+
+func (ls *LinuxStatus) GetHostname() string {
+	if ! me.Ready() {return ""}
+	return me.hostname.Get()
+}
+
+func (ls *LinuxStatus) ValidHostname() bool {
+	if ! me.Ready() {return false}
+	if me.hostnameStatus.Get() == "WORKING" {
+		return true
+	}
+	return false
+}
+
+func (ls *LinuxStatus) setHostname(newname string) {
+	if ! me.Ready() {return}
+	if newname ==  me.hostname.Get() {
+		return
+	}
+	log.Log(CHANGE, "hostname has changed from", me.GetHostname(), "to", newname)
+	me.hostname.Set(newname)
+	me.changed = true
+}
+
+func (ls *LinuxStatus) GetHostShort() string {
+	if ! me.Ready() {return ""}
+	return me.hostshort.Get()
+}
+
+func (ls *LinuxStatus) setHostShort() {
+	if ! me.Ready() {return}
+	hshort := run("hostname -s")
+	if (me.hostshort.Get() != hshort) {
+		log.Log(CHANGE, "hostname -s has changed from", me.hostshort.Get(), "to", hshort)
+		me.hostshort.Set(hshort)
+		me.changed = true
+	}
+}
+
+func lookupHostname() {
+	if ! me.Ready() {return}
+	var err error
+	var hostfqdn string = "broken"
+	hostfqdn, err = fqdn.FqdnHostname()
+	if (err != nil) {
+		log.Error(err, "FQDN hostname error")
+		return
+	}
+	log.Log(NET, "full hostname should be: ", hostfqdn)
+
+	me.setDomainName()
+	me.setHostShort()
+
+	// these are authoritative
+	// if they work wrong, your linux configuration is wrong.
+	// Do not complain.
+	// Fix your distro if your box is otherwise not working this way
+	hshort := me.GetHostShort() // from `hostname -s`
+	dn := me.GetDomainName() // from `domanname`
+	hostname := me.GetHostname() // from `hostname -f`
+
+	if hostfqdn != hostname {
+		log.Log(WARN, "hostname", hostname, "does not equal fqdn.FqdnHostname()", hostfqdn)
+		// TODO: figure out what is wrong
+	}
+
+	var test string
+	test = hshort + "." + dn
+
+	me.setHostname(test)
+
+	if (hostname != test) {
+		log.Log(CHANGE, "hostname", hostname, "does not equal", test)
+		if (me.hostnameStatus.Get() != "BROKEN") {
+			log.Log(CHANGE, "hostname", hostname, "does not equal", test)
+			me.changed = true
+			me.hostnameStatus.Set("BROKEN")
+		}
+	} else {
+		if (me.hostnameStatus.Get() != "WORKING") {
+			log.Log(CHANGE, "hostname", hostname, "is valid")
+			me.hostnameStatus.Set("WORKING")
+			me.changed = true
+		}
+	}
+}
+
+// returns true if the hostname is good
+// check that all the OS settings are correct here
+// On Linux, /etc/hosts, /etc/hostname
+//      and domainname and hostname
+func goodHostname() bool {
+	content, err := ioutil.ReadFile("/etc/hostname")
+	if err != nil {
+		// this needs to be a fixWindow() error
+		log.Error(err)
+	}
+
+	hostname := string(content)
+
+	log.Log(NOW, "hostname =", hostname)
+
+	hs := run("hostname -s")
+	dn := run("domainname")
+	log.Log(NOW, "hostname short =", hs, "domainname =", dn)
+
+	tmp := hs + "." + dn
+	if (hostname == tmp) {
+		log.Log(NOW, "hostname seems to be good", hostname)
+		return true
+	}
+
+	return false
+}