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.

       -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 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 https://cr.yp.to/daemontools.html

       multiwatch(1), see https://git.lighttpd.net/lighttpd/multiwatch

                                         21 November 2012                           spawn-fcgi(1)