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gd_hide(3) GETDATA gd_hide(3)


gd_hide, gd_unhide — hide or unhide a Dirfile database entry


#include <getdata.h>

int gd_hide(const DIRFILE *dirfile, const char *entry_name);

int gd_unhide(const DIRFILE *dirfile, const char *entry_name);


The gd_hide() function hides the field or alias called entry_name in the dirfile(5) database specified by dirfile and indicates whether the field or alias called is hidden or not. Similarly, the gd_unhide() function unhides the specified entry. An entry can also be hidden or unhidden using gd_alter_entry(3).

By default, a hidden entry does not appear in the lists returned by the functions gd_match_entries(3), gd_entry_list(3) gd_constants(3), or gd_strings(3), including the special-case versions of gd_entry_list(3) such as gd_field_list(3). These omissions are also reflected in the counts returned by the corresponding field counting function gd_nentries(3) and it's special-case versions (gd_nfields(3), &c.).


Upon successful completion, gd_hide() and gd_unhide() return zero. On error, they return a negative-valued error code. Possible error codes are:

The specified dirfile was opened read-only.
The field specified by field_code was not found in the database.
The supplied dirfile was invalid.
The metadata of the affected format specification fragments was protected from change.

The error code is also stored in the DIRFILE object and may be retrieved after this function returns by calling gd_error(3). A descriptive error string for the error may be obtained by calling gd_error_string(3).


The gd_hide() and gd_unhide() functions appeared in GetData-0.8.0.

In GetData-0.10.0, the error return from these functions changed from -1 to a negative-valued error code.


gd_alter_entry(3), gd_field_list(3), gd_hidden(3), gd_nfields(3), gd_open(3), dirfile(5)

25 December 2016 Version 0.10.0