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34 .Nd run detached from the controlling terminal
38 .Op Fl p Ar child_pidfile
39 .Op Fl P Ar supervisor_pidfile
42 .Ar command arguments ...
46 utility detaches itself from the controlling terminal and
47 executes the program specified by its arguments.
48 Privileges may be lowered to the specified user.
50 The options are as follows:
51 .Bl -tag -width indent
53 Change the current working directory to the root
56 Redirect standard input, standard output and standard error to
58 .It Fl p Ar child_pidfile
59 Write the ID of the created process into the
64 The program is executed in a spawned child process while the
66 waits until it terminates to keep the
68 locked and removes it after the process exits.
71 owner is the user who runs the
73 regardless of whether the
75 option is used or not.
76 .It Fl P Ar supervisor_pidfile
80 .Ar supervisor_pidfile
84 The program is executed in a spawned child process while the
86 waits until it terminates to keep the
87 .Ar supervisor_pidfile
88 locked and removes it after the process exits.
90 .Ar supervisor_pidfile
91 owner is the user who runs the
93 regardless of whether the
95 option is used or not.
97 Supervise and restart the program if it has been terminated.
99 Process title for the daemon to make it easily identifiable.
101 Login name of the user to execute the program under.
102 Requires adequate superuser privileges.
110 option is specified the program is executed in a spawned child process.
113 waits until it terminates to keep the pid file(s) locked and removes them
114 after the process exits or restarts the program.
115 In this case if the monitoring
117 receives software termination signal (SIGTERM) it forwards it to the
119 Normally it will cause the child to exit, remove the pidfile(s)
124 option is useful combined with the
127 .Ar supervisor_pidfile
128 contains the ID of the supervisor
130 This is especially important if you use
132 in an rc script as the
134 option will give you the child's ID to signal when you attempt to
135 stop the service, causing
137 to restart the child.
141 utility exits 1 if an error is returned by the
143 library routine, 2 if
146 .Ar supervisor_pidfile
147 is requested, but cannot be opened, 3 if process is already running (pidfile
148 exists and is locked),
151 If the command cannot be executed, an error message is displayed on
152 standard error unless the
166 utility first appeared in