nlist(3C)                                               nlist(3C)



     NAME
          nlist - get entries from name list

     SYNOPSIS
          #include <a.out.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; it selectively extracts a
          list of values and puts them in the array of nlist struc-
          tures pointed to by nl.  The name list nl consists of an ar-
          ray of structures containing names of variables, types, and
          values.  The list is terminated with a null name; i.e., 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 in-
          serted in the next two fields.  The type filed 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.

     RETURN VALUE
          nlist returns -1 upon error; otherwise it returns 0.

          All value entries are set to 0 if the file cannot be read or
          if it does not contain a valid name list.

     SEE ALSO
          a.out(4).


















     April, 1990                                                     1