.TH curs_initscr 3X "" .SH NAME \fBinitscr\fR, \fBnewterm\fR, \fBendwin\fR, \fBisendwin\fR, \fBset_term\fR, \fBdelscreen\fR - \fBcurses\fR screen initialization and manipulation routines .SH SYNOPSIS \fB#include <curses.h>\fR \fBWINDOW *initscr(void);\fR .br \fBint endwin(void);\fR .br \fBint isendwin(void);\fR .br \fBSCREEN *newterm(const char *type, FILE *outfd, FILE *infd);\fR .br \fBSCREEN *set_term(SCREEN *new);\fR .br \fBvoid delscreen(SCREEN* sp);\fR .br .SH DESCRIPTION \fBinitscr\fR is normally the first \fBcurses\fR routine to call when initializing a program. A few special routines sometimes need to be called before it; these are \fBslk_init\fR, \fBfilter\fR, \fBripoffline\fR, \fBuse_env\fR. For multiple-terminal applications, \fBnewterm\fR may be called before \fBinitscr\fR. The initscr code determines the terminal type and initializes all \fBcurses\fR data structures. \fBinitscr\fR also causes the first call to \fBrefresh\fR to clear the screen. If errors occur, \fBinitscr\fR writes an appropriate error message to standard error and exits; otherwise, a pointer is returned to \fBstdscr\fR. A program that outputs to more than one terminal should use the \fBnewterm\fR routine for each terminal instead of \fBinitscr\fR. A program that needs to inspect capabilities, so it can continue to run in a line-oriented mode if the terminal cannot support a screen-oriented program, would also use \fBnewterm\fR. The routine \fBnewterm\fR should be called once for each terminal. It returns a variable of type \fBSCREEN *\fR which should be saved as a reference to that terminal. The arguments are the \fItype\fR of the terminal to be used in place of \fB$TERM\fR, a file pointer for output to the terminal, and another file pointer for input from the terminal (if \fItype\fR is \fBNULL\fR, \fB$TERM\fR will be used). The program must also call \fBendwin\fR for each terminal being used before exiting from \fBcurses\fR. If \fBnewterm\fR is called more than once for the same terminal, the first terminal referred to must be the last one for which \fBendwin\fR is called. A program should always call \fBendwin\fR before exiting or escaping from \fBcurses\fR mode temporarily. This routine restores tty modes, moves the cursor to the lower left-hand corner of the screen and resets the terminal into the proper non-visual mode. Calling \fBrefresh\fR or \fBdoupdate\fR after a temporary escape causes the program to resume visual mode. The \fBisendwin\fR routine returns \fBTRUE\fR if \fBendwin\fR has been called without any subsequent calls to \fBwrefresh\fR, and \fBFALSE\fR otherwise. The \fBset_term\fR routine is used to switch between different terminals. The screen reference \fBnew\fR becomes the new current terminal. The previous terminal is returned by the routine. This is the only routine which manipulates \fBSCREEN\fR pointers; all other routines affect only the current terminal. The \fBdelscreen\fR routine frees storage associated with the \fBSCREEN\fR data structure. The \fBendwin\fR routine does not do this, so \fBdelscreen\fR should be called after \fBendwin\fR if a particular \fBSCREEN\fR is no longer needed. .SH RETURN VALUE \fBendwin\fR returns the integer \fBERR\fR upon failure and \fBOK\fR upon successful completion. Routines that return pointers always return \fBNULL\fR on error. .SH NOTES Note that \fBinitscr\fR and \fBnewterm\fR may be macros. .SH PORTABILITY These functions are described in the XSI Curses standard, Issue 4. It specifies that portable applications must not call \fBinitscr\fR more than once. .SH SEE ALSO \fBcurses\fR(3X), \fBcurs_kernel\fR(3X), \fBcurs_refresh\fR(3X), \fBcurs_slk\fR(3X), \fBcurs_util\fR(3X) .\"# .\"# The following sets edit modes for GNU EMACS .\"# Local Variables: .\"# mode:nroff .\"# fill-column:79 .\"# End: