nlist(S)
nlist --
get entries from name list
Syntax
cc ... -lc
#include <nlist.h>
int nlist (filename, nl)
char *filename;
struct nlist *nl;
Description
The
nlist
function
examines the name list in
the executable file whose name is pointed to by
filename,
and selectively extracts a
list of values and puts them in the array of nlist
structures pointed to by nl.
The name list
nl
consists of
an array of structures containing names of variables,
types, and values.
The list is terminated with a null name;
that is, a null string is in the name position of the structure.
Each variable name is
looked up in the name list of
the file.
If the name is found, the type and value of the
name are inserted in the next two fields.
The type field is set to 0 unless the
file was compiled with the -g option.
If the name is not found, both entries are set to 0.
See
a.out(FP)
for a discussion of the symbol table structure.
This function is useful for
examining the system name list kept in
the file
/unix.
In this way programs can obtain system addresses
that are up to date.
Diagnostics
All
value entries are set to 0 if the file cannot be read
or if it does not contain a valid name list.
The
nlist
function
returns -1 upon error; otherwise it returns 0.
Notes
The <nlist.h>
header file is automatically
included by <a.out.h>
for compatibility.
However, if the only information needed from <a.out.h>
is for use of
nlist,
then including <a.out.h>
is discouraged.
If <a.out.h>
is included, the line
``#undef n_name'' may need to follow it.
See also
a.out(FP)
Standards conformance
nlist is not part of any
currently supported standard;
it was developed by UNIX System Laboratories, Inc. and
is maintained by The SCO Group.
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003