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fcntl_setlease(9) [centos man page]

FCNTL_SETLEASE(9)						   The Linux VFS						 FCNTL_SETLEASE(9)

NAME
fcntl_setlease - sets a lease on an open file SYNOPSIS
int fcntl_setlease(unsigned int fd, struct file * filp, long arg); ARGUMENTS
fd open file descriptor filp file pointer arg type of lease to obtain DESCRIPTION
Call this fcntl to establish a lease on the file. Note that you also need to call F_SETSIG to receive a signal when the lease is broken. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 FCNTL_SETLEASE(9)

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auto_parms(1M)															    auto_parms(1M)

NAME
auto_parms - initial system configuration plus DHCP support command SYNOPSIS
DESCRIPTION
The command is a system initialization command that handles first-boot configuration, that is, the setting of unique system "initial iden- tity parameters", and ongoing management of DHCP lease(s). The command is invoked at boot time by the command. Initially it loads a list of available ethernet interfaces and requests a DHCP lease on each interface. See the rc(1M) manpage for information about for invocation context. While checking for availability of a lease on each interface, also consults and examines the variable If it is set to "1", attempts to request a lease on the the interface designated by If is set to "0" (the default case) or is absent from does not attempt a DHCP request on that interface. Once a lease is secured, the information supplied with the lease is used to initialize key networking parameters; see dhcpdb2conf(1M). If detects that the system is undergoing "first-boot" (meaning the system's hostname is not yet set), it invokes to verify the DHCP-sup- plied parameters and to collect any parameters not supplied by DHCP. For all subsequent boots, the data supplied by a DHCP lease is assumed by to be correct. Note that in a (non-mobile) environment where DHCP is used for IP address management, under normal conditions the lease information should not change between reboots. This is accom- plished by placing in "lease maintenance mode" prior to exiting. FILES
The command itself. Common subroutines used by and sub-area commands. Log files written and saved by AUTHOR The command was developed by HP. SEE ALSO
dhcpdb2conf(1M), rc(1M), set_parms(1M). auto_parms(1M)
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