nlist(3E)           (C Programming Language Utilities)            nlist(3E)


   NAME
         nlist - get entries from name list

   SYNOPSIS
         cc [flag ...] file ...  -lelf [library ...]

         #include <nlist.h>

         int nlist (const 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, value, storage class, and
         section number of the name are inserted in the other fields.  The
         type field may be set to 0 if the file was not compiled with the -g
         option to cc(1).  nlist will always return the information for an
         external symbol of a given name if the name exists in the file.  If
         an external symbol does not exist, and there is more than one symbol
         with the specified name in the file (such as static symbols defined
         in separate files), the values returned will be for the last
         occurrence of that name in the file.  If the name is not found, all
         fields in the structure except n_name are set to 0.

         This function is useful for examining the system name list kept in
         the file /stand/unix.  In this way programs can obtain system
         addresses that are up to date.

   SEE ALSO
         a.out(4).

   DIAGNOSTICS
         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 0 on success, -1 on error.












   7/91                                                                 Page 1