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From: Eric Wong <e@80x24.org>
To: unicorn-public@bogomips.org
Subject: [PATCH] doc: document UNICORN_FD in manpage
Date: Thu, 12 Mar 2015 22:32:42 +0000	[thread overview]
Message-ID: <1426199562-13009-1-git-send-email-e@80x24.org> (raw)

Due to the prevalence of socket activation in modern init systems,
we shall document UNICORN_FD (previously an implementation detail)
in the manpage.
 Documentation/unicorn.1.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/unicorn.1.txt b/Documentation/unicorn.1.txt
index 376a6c6..b03962e 100644
--- a/Documentation/unicorn.1.txt
+++ b/Documentation/unicorn.1.txt
@@ -163,6 +163,13 @@ set in the old master process are inherited by the new master process.
 Unicorn only uses (and will overwrite) the UNICORN_FD environment
 variable internally when doing transparent upgrades.
+UNICORN_FD is a comma-delimited list of one or more file descriptors
+used to implement USR2 upgrades.  Init systems may bind listen sockets
+itself and spawn unicorn with UNICORN_FD set to the file descriptor
+numbers of the listen socket(s).  The unicorn CONFIG_FILE must still
+have the inherited listen socket parameters defined as in a normal
+startup, otherwise the socket will be closed.
 * unicorn_rails(1)

                 reply	other threads:[~2015-03-12 22:32 UTC|newest]

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