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To edit the lines in a source file, use the edit
command.
The editing program of your choice
is invoked with the current line set to
the active line in the program.
Alternatively, there are several ways to specify what part of the file you
want to print if you want to see other parts of the program:
edit location
location
. Editing starts at that location
, e.g., at the specified source line of the specified file. See Specify Location, for all the possible forms of the location
argument; here are the forms of the edit
command most commonly used:edit number
number
as the active line number.edit function
function
at the beginning of its definition.
You can customize GDB to use any editor you want
10.
By default, it is /bin/ex
, but you can change this
by setting the environment variable EDITOR
before using
GDB. For example, to configure GDB to use the
vi
editor, you could use these commands with the sh
shell:
EDITOR=/usr/bin/vi export EDITOR gdb …
or in the csh
shell,
setenv EDITOR /usr/bin/vi gdb …
The only restriction is that your editor (say ex
), recognizes the
following command-line syntax:
ex +number file
The optional numeric value +number
specifies the number of the line in
the file where to start editing.