spawn-fcgi(1)spawn-fcgi(1)NAMEspawn-fcgi - Spawns FastCGI processes
SYNOPSISspawn-fcgi [options] [ -- <fcgiapp> [fcgi app arguments]]
spawn-fcgi-v
spawn-fcgi-h
DESCRIPTIONspawn-fcgi is used to spawn remote and local FastCGI processes.
While it is obviously needed to spawn remote FastCGI backends (the web
server can only spawn local ones), it is recommended to spawn local
backends with spawn-fcgi, too.
Reasons why you may want to use spawn-fcgi instead of something else:
* Privilege separation without needing a suid-binary or running a
server as root.
* You can restart your web server and the FastCGI applications without
restarting the others.
* You can run them in different chroot()s.
* Running your FastCGI applications doesn't depend on the web server
you are running, which allows for easier testing of other web
servers.
OPTIONSspawn-fcgi accepts the following options:
-f <path>
Filename of the FastCGI application to spawn. This option is
deprecated and it is recommend to always specify the applica‐
tion (absolute path) and its parameters after "--"; the fcgiapp
parameter is directly used for the exec() call, while for
starting the binary given with -f /bin/sh is needed (which may
not be available in a chroot).
This option is ignored if fcgiapp is given.
-d <path>
Change the current directory before spawning the application.
-a <address>
IPv4/IPv6 address to bind to; only used if -p is given too.
Defaults to "0.0.0.0" (IPv4).
-p <port>
TCP port to bind to; you cannot combine this with the -s
option.
-s <path>
Path to the Unix domain socket to bind to; you cannot combine
this with the -p option.
-C <children>
(PHP only) Number of children to spawn by setting the
PHP_FCGI_CHILDREN environment variable. Default is not to over‐
write the environment variable; php will spawn no children if
the variable is not set (same as setting it to 0).
-F <children>
Number of children to fork, defaults to 1. This option doesn't
work with -n, have a look at multiwatch(1) if you want to
supervise multiple forks on the same socket.
-b <backlog>
backlog to allow on the socket (default 1024). This is usually
limited by the kernel too, check sysctl net.core.somaxconn
(default 128) for linux.
backlog is the queue of connections that the kernel accepts
before the userspace application sees them.
-P <path>
Name of the PID file for spawned processes (ignored in no-fork
mode)
-n No forking should take place (for daemontools)
-M <mode>
Change file mode of the Unix domain socket (octal integer);
only used if -s is given too. Defaults to read+write for user
and group (0660) as far as the umask allows it.
-?, -h General usage instructions
-v Shows version information and exits
The following options are only available if you invoke spawn-fcgi as
root:
-c <directory>
Chroot to specified directory; the Unix domain socket is cre‐
ated inside the chroot unless -S is given.
-S Create Unix domain socket before chroot().
-u User ID to change to.
-g Group ID to change to. Defaults to primary group of the user
given for -u.
-U Change user of the Unix domain socket, defaults to the value of
-u. (only used if -s is given)
-G Change group of the Unix domain socket, defaults to the primary
group of the user given for -U; if -U wasn't given, defaults to
the value of -g. (only used if -s is given)
SEE ALSOsvc(8), supervise(8), see http://cr.yp.to/daemontools.html
multiwatch(1), see http://cgit.stbuehler.de/gitosis/multiwatch/about/
21 November 2012 spawn-fcgi(1)
