NAME¶
spawn-fcgi - Spawns FastCGI processes
SYNOPSIS¶
spawn-fcgi [options] [ -- <fcgiapp> [fcgi app arguments]]
spawn-fcgi -v
spawn-fcgi -h
DESCRIPTION¶
spawn-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.
OPTIONS¶
spawn-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 application
(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 overwrite 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.
- -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; only used if -s
is given too.
- -?, -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
created 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 ALSO¶
svc(8), supervise(8), see
http://cr.yp.to/daemontools.html
multiwatch(1), see
http://cgit.stbuehler.de/gitosis/multiwatch/about/