NLIST(3C) (C Programming Language Utilities) NLIST(3C)
NAME
nlist - get entries from name list
SYNOPSIS
#include <nlist.h>
int nlist (filename, nl)
char *filename;
struct nlist *nl;
DESCRIPTION
nlist 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 will be
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(4) 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.
NOTES
The <nlist.h> header file is automatically included by
<a.out.h> for compatability. 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(4).
DIAGNOSTICS
Page 1 May 1989
NLIST(3C) (C Programming Language Utilities) NLIST(3C)
All value entries are set to 0 if the file cannot be read or
if it does not contain a valid name list.
nlist returns -1 upon error; otherwise it returns 0.
Page 2 May 1989