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32 .Nd FreeBSD debugging boot module
34 The file that goes by the name of
36 is a set of commands designed to add debugging capabilities to
40 by themselves are not enough for most uses.
42 examples below for the most common situations, and to
44 for additional commands.
46 Before using any of the commands provided in
53 This line is present in
55 file, so it is not needed (and should not be re-issued) in a normal setup.
57 The commands provided by it are:
59 .Bl -tag -width disable-module_module -compact -offset indent
61 Executes the [string] procedure stored in the
63 environment variable after
69 environment variable is set, a continuous series of dots is printed.
71 During the duration, the user can either press Ctrl-C (or Esc) to abort or
72 ENTER to proceed immediately.
75 The environment variables that effect its behavior are:
76 .Bl -tag -width bootfile -offset indent
78 The command to be executed by
81 The duration (in seconds) to delay before executing
86 to print a continuous series of dots during the delay duration.
89 .Bl -tag -width /boot/loader.4th -compact
93 .It Pa /boot/delay.4th
96 .It Pa /boot/loader.rc
101 Introducing a 5-second delay before including another file from
102 .Pa /boot/loader.rc :
104 .Bd -literal -offset indent -compact
105 include /boot/delay.4th
106 set delay_command="include /boot/other.4th"
119 set of commands first appeared in
124 set of commands was written by
126 .An Devin Teske Aq dteske@FreeBSD.org .