xenial (1) spawn-fcgi.1.gz

Provided by: spawn-fcgi_1.6.4-1_amd64 bug

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 http://cr.yp.to/daemontools.html

       multiwatch(1), see http://cgit.stbuehler.de/gitosis/multiwatch/about/

                                                21 November 2012                                   spawn-fcgi(1)