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Stop logging EOFs and exit(1)s in ssh handler (#20476) 

The code in modules/ssh/ssh.go:sessionHandler() currently cause an error to be
logged if `gitea serv` exits with a exit(1). This logging is useless because the
accompanying stderr is not provided and in any case the exit(1) is most likely due
to permissions errors.

Further it then causes the EOF to be logged - even though this is not helpful.

This PR simply checks the errors returned and stops logging them.

In the case of misconfigurations causing `gitea serv` to fail with exit(1)
the current logging is not helpful at determining this and users should simply
review the message passed over the ssh connection.

Fix #20473

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2022-07-28 20:56:55 +01:00 committed by GitHub
parent 9691d43101
commit c9c5bd88be
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1 changed files with 7 additions and 2 deletions
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9
modules/ssh/ssh.go
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@ -11,6 +11,7 @@ import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"fmt"
"io"
"net"
@ -142,10 +143,14 @@ func sessionHandler(session ssh.Session) {
// Wait for the command to exit and log any errors we get
err = cmd.Wait()
if err != nil {
log.Error("SSH: Wait: %v", err)
// Cannot use errors.Is here because ExitError doesn't implement Is
// Thus errors.Is will do equality test NOT type comparison
if _, ok := err.(*exec.ExitError); !ok {
log.Error("SSH: Wait: %v", err)
}
}
if err := session.Exit(getExitStatusFromError(err)); err != nil {
if err := session.Exit(getExitStatusFromError(err)); err != nil && !errors.Is(err, io.EOF) {
log.Error("Session failed to exit. %s", err)
}
}