X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=doc%2Fhtml%2Fman%2Fncurses.3x.html;h=fcd7c3c7569eb07bdbad8ea86178053136814da8;hp=d49f4840b592319b058f32557be1b9a8a695a55b;hb=c6cfd97b8beaf0f6deafbf8aac7281cf6aa7f012;hpb=da5e7c6148aa378da9d8da09be73e0ddd3995c6f diff --git a/doc/html/man/ncurses.3x.html b/doc/html/man/ncurses.3x.html index d49f4840..fcd7c3c7 100644 --- a/doc/html/man/ncurses.3x.html +++ b/doc/html/man/ncurses.3x.html @@ -1,8 +1,7 @@ - +
+ +- ncurses(3x) ncurses(3x)-
+NAME
ncurses - CRT screen handling and optimization package-SYNOPSIS
+SYNOPSIS
#include <curses.h>-DESCRIPTION
+DESCRIPTION
The ncurses library routines give the user a terminal- independent method of updating character screens with rea- - sonable optimization. This implementation is ``new - curses'' (ncurses) and is the approved replacement for - 4.4BSD classic curses, which has been discontinued. This - describes ncurses version 5.7 (patch 20110212). + sonable optimization. This implementation is "new curses" + (ncurses) and is the approved replacement for 4.4BSD clas- + sic curses, which has been discontinued. This describes + ncurses version 5.9 (patch 20150215). The ncurses library emulates the curses library of System V Release 4 UNIX, and XPG4 (X/Open Portability Guide) @@ -214,7 +215,9 @@ clearing and redrawing a screen containing garbage. The curscr can be used in only a few routines. - Routine and Argument Names + ++Routine and Argument Names
Many curses routines have two or more versions. The rou- tines prefixed with w require a window argument. The rou- tines prefixed with p require a pad argument. Those with- @@ -297,7 +300,9 @@ ants: a "_w" is inserted into the name. For example, waddch becomes wadd_wch. - Routine Name Index + ++Routine Name Index
The following table lists each curses routine and the name of the manual page on which it is described. Routines flagged with `*' are ncurses-specific, not described by @@ -654,6 +659,7 @@ use_env curs_util(3x) use_extended_names curs_extend(3x)* use_legacy_coding legacy_coding(3x)* + use_tioctl curs_util(3x) vid_attr curs_terminfo(3x) vid_puts curs_terminfo(3x) vidattr curs_terminfo(3x) @@ -705,8 +711,8 @@ wgetch curs_getch(3x) wgetn_wstr curs_get_wstr(3x) wgetnstr curs_getstr(3x) - wgetstr curs_getstr(3x) + wgetstr curs_getstr(3x) whline curs_border(3x) whline_set curs_border_set(3x) win_wch curs_in_wch(3x) @@ -749,15 +755,18 @@-RETURN VALUE
+RETURN VALUE
Routines that return an integer return ERR upon failure and an integer value other than ERR upon successful com- pletion, unless otherwise noted in the routine descrip- tions. - All macros return the value of the w version, except + As a general rule, routines check for null pointers passed + as parameters, and handle this as an error. + + All macros return the value of the w version, except setscrreg, wsetscrreg, getyx, getbegyx, and getmaxyx. The - return values of setscrreg, wsetscrreg, getyx, getbegyx, + return values of setscrreg, wsetscrreg, getyx, getbegyx, and getmaxyx are undefined (i.e., these should not be used as the right-hand side of assignment statements). @@ -765,22 +774,14 @@-ENVIRONMENT
+ENVIRONMENT
The following environment symbols are useful for customiz- ing the runtime behavior of the ncurses library. The most important ones have been already discussed in detail. - BAUDRATE - The debugging library checks this environment symbol - when the application has redirected output to a file. - The symbol's numeric value is used for the baudrate. - If no value is found, ncurses uses 9600. This allows - testers to construct repeatable test-cases that take - into account costs that depend on baudrate. - CC When set, change occurrences of the command_character (i.e., the cmdch capability) of the loaded terminfo - entries to the value of this symbol. Very few ter- + entries to the value of this variable. Very few ter- minfo entries provide this feature. Because this name is also used in development envi- @@ -788,6 +789,15 @@ ignores it if it does not happen to be a single char- acter. + BAUDRATE + The debugging library checks this environment vari- + able when the application has redirected output to a + file. The variable's numeric value is used for the + baudrate. If no value is found, ncurses uses 9600. + This allows testers to construct repeatable test- + cases that take into account costs that depend on + baudrate. + COLUMNS Specify the width of the screen in characters. Applications running in a windowing environment usu- @@ -815,39 +825,42 @@ as emulations. Use the use_env function to disable all use of exter- - nal environment (including system calls) to determine - the screen size. + nal environment (but not including system calls) to + determine the screen size. Use the use_tioctl func- + tion to update COLUMNS or LINES to match the screen + size obtained from system calls or the terminal data- + base. ESCDELAY - Specifies the total time, in milliseconds, for which - ncurses will await a character sequence, e.g., a - function key. The default value, 1000 milliseconds, + Specifies the total time, in milliseconds, for which + ncurses will await a character sequence, e.g., a + function key. The default value, 1000 milliseconds, is enough for most uses. However, it is made a vari- able to accommodate unusual applications. The most common instance where you may wish to change - this value is to work with slow hosts, e.g., running - on a network. If the host cannot read characters - rapidly enough, it will have the same effect as if - the terminal did not send characters rapidly enough. + this value is to work with slow hosts, e.g., running + on a network. If the host cannot read characters + rapidly enough, it will have the same effect as if + the terminal did not send characters rapidly enough. The library will still see a timeout. - Note that xterm mouse events are built up from char- - acter sequences received from the xterm. If your + Note that xterm mouse events are built up from char- + acter sequences received from the xterm. If your application makes heavy use of multiple-clicking, you - may wish to lengthen this default value because the - timeout applies to the composed multi-click event as + may wish to lengthen this default value because the + timeout applies to the composed multi-click event as well as the individual clicks. - In addition to the environment variable, this imple- - mentation provides a global variable with the same + In addition to the environment variable, this imple- + mentation provides a global variable with the same name. Portable applications should not rely upon the - presence of ESCDELAY in either form, but setting the - environment variable rather than the global variable - does not create problems when compiling an applica- + presence of ESCDELAY in either form, but setting the + environment variable rather than the global variable + does not create problems when compiling an applica- tion. - HOME Tells ncurses where your home directory is. That is + HOME Tells ncurses where your home directory is. That is where it may read and write auxiliary terminal descriptions: @@ -855,235 +868,306 @@ $HOME/.terminfo LINES - Like COLUMNS, specify the height of the screen in + Like COLUMNS, specify the height of the screen in characters. See COLUMNS for a detailed description. MOUSE_BUTTONS_123 This applies only to the OS/2 EMX port. It specifies - the order of buttons on the mouse. OS/2 numbers a + the order of buttons on the mouse. OS/2 numbers a 3-button mouse inconsistently from other platforms: 1 = left 2 = right 3 = middle. - This symbol lets you customize the mouse. The symbol - must be three numeric digits 1-3 in any order, e.g., - 123 or 321. If it is not specified, ncurses uses - 132. + This variable lets you customize the mouse. The + variable must be three numeric digits 1-3 in any + order, e.g., 123 or 321. If it is not specified, + ncurses uses 132. NCURSES_ASSUMED_COLORS - Override the compiled-in assumption that the termi- - nal's default colors are white-on-black (see - default_colors(3x)). You may set the foreground and - background color values with this environment vari- - able by proving a 2-element list: foreground,back- - ground. For example, to tell ncurses to not assume - anything about the colors, set this to "-1,-1". To - make it green-on-black, set it to "2,0". Any posi- + Override the compiled-in assumption that the termi- + nal's default colors are white-on-black (see + default_colors(3x)). You may set the foreground and + background color values with this environment vari- + able by proving a 2-element list: foreground,back- + ground. For example, to tell ncurses to not assume + anything about the colors, set this to "-1,-1". To + make it green-on-black, set it to "2,0". Any posi- tive value from zero to the terminfo max_colors value is allowed. + NCURSES_CONSOLE2 + This applies only to the MinGW port of ncurses. + + The Console2 program's handling of the Microsoft Con- + sole API call CreateConsoleScreenBuffer is defective. + Applications which use this will hang. However, it + is possible to simulate the action of this call by + mapping coordinates, explicitly saving and restoring + the original screen contents. Setting the environ- + ment variable NCGDB has the same effect. + NCURSES_GPM_TERMS - This applies only to ncurses configured to use the + This applies only to ncurses configured to use the GPM interface. If present, the environment variable is a list of one - or more terminal names against which the TERM envi- - ronment variable is matched. Setting it to an empty - value disables the GPM interface; using the built-in + or more terminal names against which the TERM envi- + ronment variable is matched. Setting it to an empty + value disables the GPM interface; using the built-in support for xterm, etc. - If the environment variable is absent, ncurses will + If the environment variable is absent, ncurses will attempt to open GPM if TERM contains "linux". NCURSES_NO_HARD_TABS - Ncurses may use tabs as part of the cursor movement - optimization. In some cases, your terminal driver - may not handle these properly. Set this environment + Ncurses may use tabs as part of the cursor movement + optimization. In some cases, your terminal driver + may not handle these properly. Set this environment variable to disable the feature. You can also adjust your stty settings to avoid the problem. - NCURSES_NO_MAGIC_COOKIES + NCURSES_NO_MAGIC_COOKIE Some terminals use a magic-cookie feature which - requires special handling to make highlighting and - other video attributes display properly. You can - suppress the highlighting entirely for these termi- + requires special handling to make highlighting and + other video attributes display properly. You can + suppress the highlighting entirely for these termi- nals by setting this environment variable. NCURSES_NO_PADDING - Most of the terminal descriptions in the terminfo - database are written for real "hardware" terminals. - Many people use terminal emulators which run in a - windowing environment and use curses-based applica- - tions. Terminal emulators can duplicate all of the + Most of the terminal descriptions in the terminfo + database are written for real "hardware" terminals. + Many people use terminal emulators which run in a + windowing environment and use curses-based applica- + tions. Terminal emulators can duplicate all of the important aspects of a hardware terminal, but they do - not have the same limitations. The chief limitation - of a hardware terminal from the standpoint of your + not have the same limitations. The chief limitation + of a hardware terminal from the standpoint of your application is the management of dataflow, i.e., tim- ing. Unless a hardware terminal is interfaced into a - terminal concentrator (which does flow control), it - (or your application) must manage dataflow, prevent- - ing overruns. The cheapest solution (no hardware + terminal concentrator (which does flow control), it + (or your application) must manage dataflow, prevent- + ing overruns. The cheapest solution (no hardware cost) is for your program to do this by pausing after - operations that the terminal does slowly, such as + operations that the terminal does slowly, such as clearing the display. - As a result, many terminal descriptions (including - the vt100) have delay times embedded. You may wish - to use these descriptions, but not want to pay the + As a result, many terminal descriptions (including + the vt100) have delay times embedded. You may wish + to use these descriptions, but not want to pay the performance penalty. - Set the NCURSES_NO_PADDING symbol to disable all but - mandatory padding. Mandatory padding is used as a - part of special control sequences such as flash. + Set the NCURSES_NO_PADDING environment variable to + disable all but mandatory padding. Mandatory padding + is used as a part of special control sequences such + as flash. NCURSES_NO_SETBUF - Normally ncurses enables buffered output during ter- - minal initialization. This is done (as in SVr4 - curses) for performance reasons. For testing pur- - poses, both of ncurses and certain applications, this - feature is made optional. Setting the - NCURSES_NO_SETBUF variable disables output buffering, - leaving the output in the original (usually line - buffered) mode. + This setting is obsolete. Before changes + + o started with 5.9 patch 20120825 and + + o continued though 5.9 patch 20130126 + + ncurses enabled buffered output during terminal ini- + tialization. This was done (as in SVr4 curses) for + performance reasons. For testing purposes, both of + ncurses and certain applications, this feature was + made optional. Setting the NCURSES_NO_SETBUF vari- + able disabled output buffering, leaving the output in + the original (usually line buffered) mode. + + In the current implementation, ncurses performs its + own buffering and does not require this workaround. + It does not modify the buffering of the standard out- + put. + + The reason for the change was to make the behavior + for interrupts and other signals more robust. One + drawback is that certain nonconventional programs + would mix ordinary stdio calls with ncurses calls and + (usually) work. This is no longer possible since + ncurses is not using the buffered standard output but + its own output (to the same file descriptor). As a + special case, the low-level calls such as putp still + use the standard output. But high-level curses calls + do not. NCURSES_NO_UTF8_ACS During initialization, the ncurses library checks for - special cases where VT100 line-drawing (and the cor- - responding alternate character set capabilities) - described in the terminfo are known to be missing. - Specifically, when running in a UTF-8 locale, the - Linux console emulator and the GNU screen program - ignore these. Ncurses checks the TERM environment - variable for these. For other special cases, you - should set this environment variable. Doing this - tells ncurses to use Unicode values which correspond + special cases where VT100 line-drawing (and the cor- + responding alternate character set capabilities) + described in the terminfo are known to be missing. + Specifically, when running in a UTF-8 locale, the + Linux console emulator and the GNU screen program + ignore these. Ncurses checks the TERM environment + variable for these. For other special cases, you + should set this environment variable. Doing this + tells ncurses to use Unicode values which correspond to the VT100 line-drawing glyphs. That works for the special cases cited, and is likely to work for termi- nal emulators. - When setting this variable, you should set it to a - nonzero value. Setting it to zero (or to a nonnum- - ber) disables the special check for "linux" and + When setting this variable, you should set it to a + nonzero value. Setting it to zero (or to a nonnum- + ber) disables the special check for "linux" and "screen". - As an alternative to the environment variable, - ncurses checks for an extended terminfo capability - U8. This is a numeric capability which can be com- + As an alternative to the environment variable, + ncurses checks for an extended terminfo capability + U8. This is a numeric capability which can be com- piled using tic -x. For example # linux console, if patched to provide working # VT100 shift-in/shift-out, with corresponding font. linux-vt100|linux console with VT100 line-graphics, - U8#0, use=linux, + U8#0, use=linux, # uxterm with vt100Graphics resource set to false xterm-utf8|xterm relying on UTF-8 line-graphics, - U8#1, use=xterm, + U8#1, use=xterm, The name "U8" is chosen to be two characters, to per- - mit it to be used by applications that use ncurses' + mit it to be used by applications that use ncurses' termcap interface. NCURSES_TRACE - During initialization, the ncurses debugging library - checks the NCURSES_TRACE symbol. If it is defined, - to a numeric value, ncurses calls the trace function, - using that value as the argument. - - The argument values, which are defined in curses.h, - provide several types of information. When running - with traces enabled, your application will write the + During initialization, the ncurses debugging library + checks the NCURSES_TRACE environment variable. If it + is defined, to a numeric value, ncurses calls the + trace function, using that value as the argument. + + The argument values, which are defined in curses.h, + provide several types of information. When running + with traces enabled, your application will write the file trace to the current directory. - TERM Denotes your terminal type. Each terminal type is + TERM Denotes your terminal type. Each terminal type is distinct, though many are similar. + TERM is commonly set by terminal emulators to help + applications find a workable terminal description. + Some of those choose a popular approximation, e.g., + "ansi", "vt100", "xterm" rather than an exact fit. + Not infrequently, your application will have problems + with that approach, e.g., incorrect function-key def- + initions. + + If you set TERM in your environment, it has no effect + on the operation of the terminal emulator. It only + affects the way applications work within the termi- + nal. Likewise, as a general rule (xterm being a rare + exception), terminal emulators which allow you to + specify TERM as a parameter or configuration value do + not change their behavior to match that setting. + TERMCAP If the ncurses library has been configured with term- - cap support, ncurses will check for a terminal's + cap support, ncurses will check for a terminal's description in termcap form if it is not available in the terminfo database. - The TERMCAP symbol contains either a terminal - description (with newlines stripped out), or a file - name telling where the information denoted by the - TERM symbol exists. In either case, setting it - directs ncurses to ignore the usual place for this - information, e.g., /etc/termcap. + The TERMCAP environment variable contains either a + terminal description (with newlines stripped out), or + a file name telling where the information denoted by + the TERM environment variable exists. In either + case, setting it directs ncurses to ignore the usual + place for this information, e.g., /etc/termcap. TERMINFO Overrides the directory in which ncurses searches for your terminal description. This is the simplest, but - not the only way to change the list of directories. + not the only way to change the list of directories. The complete list of directories in order follows: - o the last directory to which ncurses wrote, if + o the last directory to which ncurses wrote, if any, is searched first - o the directory specified by the TERMINFO symbol + o the directory specified by the TERMINFO environ- + ment variable o $HOME/.terminfo - o directories listed in the TERMINFO_DIRS symbol + o directories listed in the TERMINFO_DIRS environ- + ment variable + + o one or more directories whose names are config- + ured and compiled into the ncurses library, i.e., - o one or more directories whose names are config- - ured and compiled into the ncurses library, e.g., - /usr/share/terminfo + o /usr/local/ncurses/share/ter- + minfo:/usr/share/terminfo (corresponding to + the TERMINFO_DIRS variable) + + o /usr/share/terminfo (corresponding to the + TERMINFO variable) TERMINFO_DIRS - Specifies a list of directories to search for termi- - nal descriptions. The list is separated by colons - (i.e., ":") on Unix, semicolons on OS/2 EMX. All of - the terminal descriptions are in terminfo form, which - makes a subdirectory named for the first letter of - the terminal names therein. + Specifies a list of directories to search for termi- + nal descriptions. The list is separated by colons + (i.e., ":") on Unix, semicolons on OS/2 EMX. + + All of the terminal descriptions are in terminfo + form. Normally these are stored in a directory tree, + using subdirectories named by the first letter of the + terminal names therein. + + If ncurses is built with a hashed database, then each + entry in this list can also be the path of the corre- + sponding database file. + + If ncurses is built with a support for reading term- + cap files directly, then an entry in this list may be + the path of a termcap file. TERMPATH - If TERMCAP does not hold a file name then ncurses - checks the TERMPATH symbol. This is a list of file- - names separated by spaces or colons (i.e., ":") on - Unix, semicolons on OS/2 EMX. If the TERMPATH symbol - is not set, ncurses looks in the files /etc/termcap, - /usr/share/misc/termcap and $HOME/.termcap, in that + If TERMCAP does not hold a file name then ncurses + checks the TERMPATH environment variable. This is a + list of filenames separated by spaces or colons + (i.e., ":") on Unix, semicolons on OS/2 EMX. + + If the TERMPATH environment variable is not set, + ncurses looks in the files /etc/termcap, + /usr/share/misc/termcap and $HOME/.termcap, in that order. - The library may be configured to disregard the following - variables when the current user is the superuser (root), - or if the application uses setuid or setgid permissions: - $TERMINFO, $TERMINFO_DIRS, $TERMPATH, as well as $HOME. + The library may be configured to disregard the following + variables when the current user is the superuser (root), + or if the application uses setuid or setgid permissions: + + $TERMINFO, $TERMINFO_DIRS, $TERMPATH, as well as + $HOME.-ALTERNATE CONFIGURATIONS
- Several different configurations are possible, depending - on the configure script options used when building - ncurses. There are a few main options whose effects are +ALTERNATE CONFIGURATIONS
+ Several different configurations are possible, depending + on the configure script options used when building + ncurses. There are a few main options whose effects are visible to the applications developer using ncurses: --disable-overwrite - The standard include for ncurses is as noted in SYN- + The standard include for ncurses is as noted in SYN- OPSIS: #include <curses.h> - This option is used to avoid filename conflicts when - ncurses is not the main implementation of curses of - the computer. If ncurses is installed disabling - overwrite, it puts its headers in a subdirectory, + This option is used to avoid filename conflicts when + ncurses is not the main implementation of curses of + the computer. If ncurses is installed disabling + overwrite, it puts its headers in a subdirectory, e.g., #include <ncurses/curses.h> - It also omits a symbolic link which would allow you + It also omits a symbolic link which would allow you to use -lcurses to build executables. --enable-widec - The configure script renames the library and (if the - --disable-overwrite option is used) puts the header + The configure script renames the library and (if the + --disable-overwrite option is used) puts the header files in a different subdirectory. All of the - library names have a "w" appended to them, i.e., + library names have a "w" appended to them, i.e., instead of -lncurses @@ -1093,18 +1177,29 @@ -lncursesw You must also define _XOPEN_SOURCE_EXTENDED when com- - piling for the wide-character library to use the - extended (wide-character) functions. The curses.h - file which is installed for the wide-character - library is designed to be compatible with the normal + piling for the wide-character library to use the + extended (wide-character) functions. The curses.h + file which is installed for the wide-character + library is designed to be compatible with the normal library's header. Only the size of the WINDOW struc- - ture differs, and very few applications require more - than a pointer to WINDOWs. If the headers are - installed allowing overwrite, the wide-character - library's headers should be installed last, to allow - applications to be built using either library from + ture differs, and very few applications require more + than a pointer to WINDOWs. If the headers are + installed allowing overwrite, the wide-character + library's headers should be installed last, to allow + applications to be built using either library from the same set of headers. + --with-pthread + The configure script renames the library. All of the + library names have a "t" appended to them (before any + "w" added by --enable-widec). + + The global variables such as LINES are replaced by + macros to allow read-only access. At the same time, + setter-functions are provided to set these values. + Some applications (very few) may require changes to + work with this convention. + --with-shared --with-normal @@ -1112,86 +1207,95 @@ --with-debug --with-profile - The shared and normal (static) library names differ - by their suffixes, e.g., libncurses.so and libn- - curses.a. The debug and profiling libraries add a + The shared and normal (static) library names differ + by their suffixes, e.g., libncurses.so and libn- + curses.a. The debug and profiling libraries add a "_g" and a "_p" to the root names respectively, e.g., libncurses_g.a and libncurses_p.a. --with-trace - The trace function normally resides in the debug + The trace function normally resides in the debug library, but it is sometimes useful to configure this - in the shared library. Configure scripts should + in the shared library. Configure scripts should check for the function's existence rather than assum- ing it is always in the debug library.-FILES
+FILES
/usr/share/tabset - directory containing initialization files for the + directory containing initialization files for the terminal capability database /usr/share/terminfo ter- minal capability database-SEE ALSO
- terminfo(5) and related pages whose names begin "curs_" +SEE ALSO
+ terminfo(5) and related pages whose names begin "curs_" for detailed routine descriptions. curs_variables(3x)-EXTENSIONS
+EXTENSIONS
The ncurses library can be compiled with an option (-DUSE_GETCAP) that falls back to the old-style /etc/term- cap file if the terminal setup code cannot find a terminfo - entry corresponding to TERM. Use of this feature is not - recommended, as it essentially includes an entire termcap - compiler in the ncurses startup code, at significant cost + entry corresponding to TERM. Use of this feature is not + recommended, as it essentially includes an entire termcap + compiler in the ncurses startup code, at significant cost in core and startup cycles. - The ncurses library includes facilities for capturing - mouse events on certain terminals (including xterm). See + The ncurses library includes facilities for capturing + mouse events on certain terminals (including xterm). See the curs_mouse(3x) manual page for details. - The ncurses library includes facilities for responding to - window resizing events, e.g., when running in an xterm. - See the resizeterm(3x) and wresize(3x) manual pages for - details. In addition, the library may be configured with + The ncurses library includes facilities for responding to + window resizing events, e.g., when running in an xterm. + See the resizeterm(3x) and wresize(3x) manual pages for + details. In addition, the library may be configured with a SIGWINCH handler. - The ncurses library extends the fixed set of function key - capabilities of terminals by allowing the application - designer to define additional key sequences at runtime. + The ncurses library extends the fixed set of function key + capabilities of terminals by allowing the application + designer to define additional key sequences at runtime. See the define_key(3x) key_defined(3x), and keyok(3x) man- ual pages for details. The ncurses library can exploit the capabilities of termi- - nals which implement the ISO-6429 SGR 39 and SGR 49 con- + nals which implement the ISO-6429 SGR 39 and SGR 49 con- trols, which allow an application to reset the terminal to - its original foreground and background colors. From the - users' perspective, the application is able to draw col- - ored text on a background whose color is set indepen- - dently, providing better control over color contrasts. + its original foreground and background colors. From the + users' perspective, the application is able to draw col- + ored text on a background whose color is set indepen- + dently, providing better control over color contrasts. See the default_colors(3x) manual page for details. - The ncurses library includes a function for directing - application output to a printer attached to the terminal + The ncurses library includes a function for directing + application output to a printer attached to the terminal device. See the curs_print(3x) manual page for details.-PORTABILITY
- The ncurses library is intended to be BASE-level confor- +PORTABILITY
+ The ncurses library is intended to be BASE-level confor- mant with XSI Curses. The EXTENDED XSI Curses functional- ity (including color support) is supported. - A small number of local differences (that is, individual - differences between the XSI Curses and ncurses calls) are - described in PORTABILITY sections of the library man + A small number of local differences (that is, individual + differences between the XSI Curses and ncurses calls) are + described in PORTABILITY sections of the library man pages. + Unlike other implementations, this one checks parameters + such as pointers to WINDOW structures to ensure they are + not null. The main reason for providing this behavior is + to guard against programmer error. The standard interface + does not provide a way for the library to tell an applica- + tion which of several possible errors were detected. + Relying on this (or some other) extension will adversely + affect the portability of curses applications. + This implementation also contains several extensions: o The routine has_key is not part of XPG4, nor is it @@ -1237,7 +1341,7 @@-NOTES
+NOTES
The header file <curses.h> automatically includes the header files <stdio.h> and <unctrl.h>. @@ -1248,7 +1352,7 @@-AUTHORS
+AUTHORS
Zeyd M. Ben-Halim, Eric S. Raymond, Thomas E. Dickey. Based on pcurses by Pavel Curtis. @@ -1256,10 +1360,26 @@ ncurses(3x)-
- -Man(1) output converted with -man2html - +