X-Git-Url: https://ncurses.scripts.mit.edu/?a=blobdiff_plain;f=doc%2Fhtml%2Fman%2Fcurs_initscr.3x.html;h=ddbd933363a608a37085b6ed5f6c5f5d073e7eb7;hb=b0b1980be11bba618d84beb8b30ac94e2c820602;hp=83fca63b29247d66abce539218234366be7d6129;hpb=cef50b3afcd58166f3541b701c97bce538844c76;p=ncurses.git diff --git a/doc/html/man/curs_initscr.3x.html b/doc/html/man/curs_initscr.3x.html index 83fca63b..ddbd9333 100644 --- a/doc/html/man/curs_initscr.3x.html +++ b/doc/html/man/curs_initscr.3x.html @@ -1,7 +1,7 @@ - +
@@ -86,22 +86,34 @@ use newterm. The routine newterm should be called once for each terminal. It returns a variable of type SCREEN * which should be saved as a reference to that terminal. - The arguments are the type of the terminal to be used in - place of $TERM, a file pointer for output to the terminal, - and another file pointer for input from the terminal (if - type is NULL, $TERM will be used). The program must also - call endwin for each terminal being used before exiting - from curses. If newterm is called more than once for the - same terminal, the first terminal referred to must be the - last one for which endwin is called. - - A program should always call endwin before exiting or es- - caping from curses mode temporarily. This routine re- - stores 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 refresh or doupdate after - a temporary escape causes the program to resume visual - mode. + newterm's arguments are + + o the type of the terminal to be used in place of $TERM, + + o a file pointer for output to the terminal, and + + o another file pointer for input from the terminal + + If the type parameter is NULL, $TERM will be used. + + The program must also call endwin for each terminal being + used before exiting from curses. If newterm is called + more than once for the same terminal, the first terminal + referred to must be the last one for which endwin is + called. + + A program should always call endwin before exiting or es- + caping from curses mode temporarily. This routine + + o restores tty modes, + + o moves the cursor to the lower left-hand corner of the + screen and + + o resets the terminal into the proper non-visual mode. + + Calling refresh or doupdate after a temporary escape caus- + es the program to resume visual mode. The isendwin routine returns TRUE if endwin has been called without any subsequent calls to wrefresh, and FALSE @@ -128,8 +140,17 @@ Routines that return pointers always return NULL on error. X/Open defines no error conditions. In this implementa- - tion endwin returns an error if the terminal was not ini- - tialized. + tion + + o endwin returns an error if the terminal was not ini- + tialized. + + o newterm returns an error if it cannot allocate the da- + ta structures for the screen, or for the top-level + windows within the screen, i.e., curscr, newscr, or + stdscr. + + o set_term returns no error. @@ -139,29 +160,34 @@- These functions are described in the XSI Curses standard, + These functions are described in the XSI Curses standard, Issue 4. It specifies that portable applications must not call initscr more than once. Old versions of curses, e.g., BSD 4.4, may have returned a - null pointer from initscr when an error is detected, - rather than exiting. It is safe but redundant to check + null pointer from initscr when an error is detected, + rather than exiting. It is safe but redundant to check the return value of initscr in XSI Curses. + If the TERM variable is missing or empty, initscr uses the + value "unknown", which normally corresponds to a terminal + entry with the generic (gn) capability. Generic entries + are detected by curs_terminfo(3x) and cannot be used for full- + screen operation. Other implementations may handle a + missing/empty TERM variable differently. +
curses(3x), curs_kernel(3x), curs_refresh(3x), - curs_slk(3x), curs_util(3x), curs_variables(3x). + curs_slk(3x), curs_terminfo(3x), curs_util(3x), curs_vari- + ables(3x). curs_initscr(3x)