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pppd: Do not clobber exit codes on hangup
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When a modem hangup occurs, pppd unconditionally sets the exit status code
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to EXIT_HANGUP. This patch only sets EXIT_HANGUP if the exit status code is
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not already set to an error value.
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The motiviation of this patch is to allow applications which remote control
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pppd to react properly on errors, e.g. only redial (relaunch pppd) if there
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was a hangup, but not if the CHAP authentication failed.
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Signed-off-by: Jo-Philipp Wich <jo@mein.io>
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--- a/pppd/main.c
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+++ b/pppd/main.c
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@@ -1048,7 +1048,8 @@ get_input()
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}
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notice("Modem hangup");
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hungup = 1;
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- status = EXIT_HANGUP;
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+ if (status == EXIT_OK)
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+ status = EXIT_HANGUP;
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lcp_lowerdown(0); /* serial link is no longer available */
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link_terminated(0);
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return;
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