Attachment 2810 Details for Bug 1988 – close ControlPersist stderr when logging to file/syslog or when not in debug mode

[patch] close ControlPersist stderr when logging to file/syslog or when not in debug mode

bz1988.diff (text/plain), 1.07 KB, created by Damien Miller on 2016-04-28 23:27:08 AEST

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Creator: Damien Miller

Created: 2016-04-28 23:27:08 AEST

Size: 1.07 KB

patch

obsolete

>diff --git a/log.c b/log.c
>index a5ba22f..9011f9d 100644
>--- a/log.c
>+++ b/log.c
>@@ -308,7 +308,7 @@ log_change_level(LogLevel new_log_level)
> int
> log_is_on_stderr(void)
> {
>-	return log_on_stderr;
>+	return log_on_stderr && log_stderr_fd == STDERR_FILENO;
> }
> 
> /* redirect what would usually get written to stderr to specified file */
>diff --git a/ssh.c b/ssh.c
>index ec8a515..11e5a22 100644
>--- a/ssh.c
>+++ b/ssh.c
>@@ -1346,7 +1346,7 @@ static void
> control_persist_detach(void)
> {
> 	pid_t pid;
>-	int devnull;
>+	int devnull, close_stderr;
> 
> 	debug("%s: backgrounding master process", __func__);
> 
>@@ -1377,8 +1377,10 @@ control_persist_detach(void)
> 		error("%s: open(\"/dev/null\"): %s", __func__,
> 		    strerror(errno));
> 	} else {
>+		close_stderr = !log_is_on_stderr() || !debug_flag;
> 		if (dup2(devnull, STDIN_FILENO) == -1 ||
>-		    dup2(devnull, STDOUT_FILENO) == -1)
>+		    dup2(devnull, STDOUT_FILENO) == -1 ||
>+		    (close_stderr && dup2(devnull, STDERR_FILENO) == -1))
> 			error("%s: dup2: %s", __func__, strerror(errno));
> 		if (devnull > STDERR_FILENO)
> 			close(devnull);

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