get_parent_fragment (3) - Linux Manuals

get_parent_fragment: retrieve the parent fragment of a fragment in a dirfile


get_parent_fragment --- retrieve the parent fragment of a fragment in a dirfile


#include <getdata.h>
int get_parent_fragment(const DIRFILE *dirfile, int fragment_index);


The get_parent_fragment() function queries a dirfile(5) database specified by dirfile and returns the index of the fragment which contains the INCLUDE directive for the fragment indexed by fragment_index.

Since the primary format file fragment is not included in any other fragment, passing zero for fragment_index will result in an error.


On success, get_parent_fragment() returns the index of the specified fragment's parent. On error, get_parent_fragment() returns -1 and sets the dirfile error to a non-zero value. Possible error values are:
The supplied dirfile was invalid.
The supplied index was out of range, or was equal to zero. The dirfile error may be retrieved by calling get_error(3). A descriptive error string for the last error encountered can be obtained from a call to get_error_string(3).