commit a0aa256c3bf692b31117acb6d885a0b012661014 Author: David Fifield david@bamsoftware.com Date: Fri Feb 22 16:42:41 2019 -0700

Minor refactoring of meek-client-torbrowser. --- meek-client-torbrowser/meek-client-torbrowser.go | 65 ++++++++++++------------ 1 file changed, 32 insertions(+), 33 deletions(-)

diff --git a/meek-client-torbrowser/meek-client-torbrowser.go b/meek-client-torbrowser/meek-client-torbrowser.go index 2daa108..f3ffc68 100644 --- a/meek-client-torbrowser/meek-client-torbrowser.go +++ b/meek-client-torbrowser/meek-client-torbrowser.go @@ -203,6 +203,30 @@ func isBrowserProfileUpToDate(templatePath string, profilePath string) bool { // the path to the Firefox profile to use. Otherwise, the profile is chosen in a // platform-specific way (see linux.go, mac.go, windows.go). func runFirefox() (cmd *exec.Cmd, stdout io.Reader, err error) { + // Unset environment variables that Firefox sets after a restart (as + // caused by, for example, an update or the installation of an add-on). + // XRE_PROFILE_PATH, in particular, overrides the -profile option that + // runFirefox sets, causing Firefox to run with profile.default instead + // of profile.meek-http-helper, which conflicts with the profile.default + // that is already running. See https://bugs.torproject.org/13247, + // particularly #comment:17 and #comment:18. The environment variable + // names come from + // https://hg.mozilla.org/mozilla-central/file/cfde3603b020/toolkit/xre/nsAppRu... + for _, varname := range []string{ + "XRE_PROFILE_PATH", + "XRE_PROFILE_LOCAL_PATH", + "XRE_PROFILE_NAME", + "XRE_START_OFFLINE", + "NO_EM_RESTART", + "XUL_APP_FILE", + "XRE_BINARY_PATH", + } { + err = os.Unsetenv(varname) + if err != nil { + return + } + } + // Mac OS X needs absolute paths for firefox and for the profile. var absFirefoxPath string absFirefoxPath, err = filepath.Abs(firefoxPath) @@ -327,29 +351,14 @@ func main() { sigChan := make(chan os.Signal, 1) signal.Notify(sigChan, syscall.SIGTERM)

- // Unset environment variables that Firefox sets after a restart (as - // caused by, for example, an update or the installation of an add-on). - // XRE_PROFILE_PATH, in particular, overrides the -profile option that - // runFirefox sets, causing Firefox to run with profile.default instead - // of profile.meek-http-helper, which conflicts with the profile.default - // that is already running. See https://bugs.torproject.org/13247, - // particularly #comment:17 and #comment:18. The environment variable - // names come from - // https://hg.mozilla.org/mozilla-central/file/cfde3603b020/toolkit/xre/nsAppRu... - var firefoxRestartEnvVars = []string{ - "XRE_PROFILE_PATH", - "XRE_PROFILE_LOCAL_PATH", - "XRE_PROFILE_NAME", - "XRE_START_OFFLINE", - "NO_EM_RESTART", - "XUL_APP_FILE", - "XRE_BINARY_PATH", - } - for _, varname := range firefoxRestartEnvVars { - err := os.Unsetenv(varname) - if err != nil { - log.Fatal(err) - } + if os.Getenv("TOR_PT_EXIT_ON_STDIN_CLOSE") == "1" { + // This environment variable means we should treat EOF on stdin + // just like SIGTERM: https://bugs.torproject.org/15435. + go func() { + io.Copy(ioutil.Discard, os.Stdin) + log.Print("synthesizing SIGTERM because of stdin close") + sigChan <- syscall.SIGTERM + }() }

// Start firefox. @@ -375,16 +384,6 @@ func main() { } defer logKill(meekClientCmd.Process)

- if os.Getenv("TOR_PT_EXIT_ON_STDIN_CLOSE") == "1" { - // This environment variable means we should treat EOF on stdin - // just like SIGTERM: https://bugs.torproject.org/15435. - go func() { - io.Copy(ioutil.Discard, os.Stdin) - log.Printf("synthesizing SIGTERM because of stdin close") - sigChan <- syscall.SIGTERM - }() - } - sig := <-sigChan log.Printf("sig %s", sig) err = logSignal(meekClientCmd.Process, sig)