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. + # SEE ALSO * unicorn_rails(1) -- 2.3.2.209.gd67f9d5
