gd_alter_protection(3)

NAME
gd_alter_protection — modify the protection level of a dirfile fragment

SYNOPSIS
#include <getdata.h>

int gd_alter_protection(DIRFILE *dirfile, int protection_level, int fragment_index);

DESCRIPTION
The gd_alter_protection() function sets the advisory protection level of the format specification fragment given by fragment_index to protection_level in the dirfile(5) database specified by dirfile.

The protection_level argument should be one of the following:

GD_PROTECT_NONE
    Indicating that the fragment should not be protected at all.

GD_PROTECT_FORMAT
    Indicating that the fragment's metadata should be protected.

GD_PROTECT_DATA
    Indicating that the fragment's binary data should be protected.

GD_PROTECT_ALL
    Indicating that both the fragment's metadata and its binary data should be protected. This symbol is equivalent to the bitwise or of GD_PROTECT_FORMAT and GD_PROTECT_DATA.

In addition to being simply a valid fragment index, fragment_index may also be the special value GD_ALL_FRAGMENTS, which indicates that the protection level of all fragments in the database should be changed.

RETURN VALUE
Upon successful completion, gd_alter_protection() returns zero. On error, it returns -1 and sets the dirfile error to a non-zero error value. Possible error values are:

GD_E_ACCMODE
    The specified dirfile was opened read-only.

GD_E_ARGUMENT
    The supplied protection_level was invalid.

GD_E_BAD_DIRFILE
    The supplied dirfile was invalid.

GD_E_BAD_INDEX
    The supplied index was out of range.

GD_E_BAD_PROTECTION
    The supplied protection level was invalid.

The dirfile error may be retrieved by calling gd_error(3). A descriptive error string for the last error encountered can be obtained from a call to gd_error_string(3).

NOTES
This is the only GetData function which ignores the (existing) protection level of a format specification fragment.

SEE ALSO
gd_open(3), gd_error(3), gd_error_string(3), gd_protection(3), dirfile(5), dirfile-format(5)