form_field_buffer.3x man page

form_field_buffer ā€” field buffer control


#include <form.h>

int set_field_buffer(FIELD *field, int buf, const char *value);
char *field_buffer(const FIELD *field, int buffer);
int set_field_status(FIELD *field, bool status);
bool field_status(const FIELD *field);
int set_max_field(FIELD *field, int max);


The function set_field_buffer sets the numbered buffer of the given field to contain a given string:

The function field_buffer returns a pointer to the contents of the given numbered buffer:

The function set_field_status sets the associated status flag of field; field_status gets the current value. The status flag is set to a nonzero value whenever the field changes.

The function set_max_field sets the maximum size for a dynamic field. An argument of 0 turns off any maximum size threshold for that field.

Return Value

The field_buffer function returns NULL on error. It sets errno according to their success:


The routine succeeded.


Routine detected an incorrect or out-of-range argument.

The field_status function returns TRUE or FALSE.

The remaining routines return one of the following:


The routine succeeded.


System error occurred (see errno).


Routine detected an incorrect or out-of-range argument.

See Also

curses(3X) and related pages whose names begin "form_" for detailed descriptions of the entry points.


The header file <form.h> automatically includes the header file

When configured for wide characters, field_buffer returns a pointer to temporary storage (allocated and freed by the library). The application should not attempt to modify the data. It will be freed on the next call to field_buffer to return the same buffer. <curses.h>.


These routines emulate the System V forms library. They were not supported on Version 7 or BSD versions.


Juergen Pfeifer. Manual pages and adaptation for new curses by Eric S. Raymond.