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show commands Display the last ten commands in the command
history.
show commands n
Print ten commands centered on command
number n.
show commands + Print ten commands just after the commands last
printed.
17.4 Setting the GDB Screen Size
Certain commands to GDB may produce large amounts of information output to the
screen. To help you read all of it, GDB pauses and asks you for input at the end of each
page of output. Type RET when you want to continue the output, or q to discard the
remaining output. Also, the screen width setting determines when to wrap lines of
output. Depending on what is being printed, GDB tries to break the line at a readable
place, rather than simply letting it over flow onto the following line.
Normally GDB knows the size of the screen from the terminal driver software. For
example, on Unix, GDB uses the termcap data base together with the value of the TERM
environment variable and the stty rows and stty cols settings. If this is not correct,
you can override it with the set height and set width commands:
set height lpp, show
height se, set width
cpl, show width
These set commands specify a screen height of lpp lines and
a screen width of cpl characters. The associated show
commands display the current settings.
If you specify a height of zero lines, GDB does not pause during
output no matter how long the output is. This is useful if output
is to a file or to an editor buffer.
Likewise, you can specify set width 0 to prevent GDB from
wrapping its output.
17.5 Supported Number Formats
You can always enter numbers in octal, decimal, or hexadecimal in GDB by the usual
conventions: octal numbers begin with `0', decimal numbers end with `.', and
hexadecimal numbers begin with `0x'. Numbers that begin with none of these are, by
default, entered in base 10; likewise, the default display for numbers|when no particular
format is specified| is base 10. You can change the default base for both input and
output with the set radix command.
set input-radix base
Set the default base for numeric input. Supported
choices for base are decimal 8, 10, or 16. base must
itself be specified either unambiguously or using the
current default radix; for example, any of
set radix 012
set radix 10
17.4 Setting the GDB Screen Size 283