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Constants

This chapter describes constants (defined names) and their values.

The values of defined names in this chapter are provided for reference only; they may change in future releases. They are especially valuable when debugging, when the name might not be available.

_access Mode Values

Declared in: io.h

Name 	Value 	Meaning
F_OK 	0 	Does file exist? 
X_OK 	1 	Can file be executed? 
W_OK 	2 	Can file be written? 
R_OK 	4 	Can file be read? 
_bios_disk Service Values

Declared in: bios.h

Name 			Value 	Meaning
_DISK_RESET 		0 	Hard reset 
_DISK_STATUS 		1 	Retrieve status 
_DISK_READ 		2 	Read sectors 
_DISK_WRITE 		3 	Write sectors 
_DISK_VERIFY 		4 	Verify disk readability 
_DISK_FORMAT 		5	Format track 
_bios_keybrd Service Values

Declared in: bios.h

Name	 		Value 	Meaning
_KEYBRD_READ 		0x00 	Keyboard read 
_KEYBRD_READY 		0x01 	Is keystroke available? 
_KEYBRD_SHIFTSTATUS 	0x02 	Retrieve shift key status 
_NKEYBRD_READ 		0x10 	Enhanced read 
_NKEYBRD_READY	 	0x11 	Enhanced ready 
_NKEYBRD_SHIFTSTATUS 	0x12 	Enhanced shift status 
_bios_printer Service Values

Declared in: bios.h


Name 			Value 	Meaning
_PRINTER_WRITE 		0 	Write data to printer 
_PRINTER_INIT 		1 	Initialize printer 
_PRINTER_STATUS 	2 	Retrieve printer status 
_bios_serialcom Service Values

Declared in: bios.h

Name 		Value 	Meaning
_COM_INIT 	0 	Initialize port 
_COM_SEND 	1 	Send data 
_COM_RECEIVE 	2 	Receive data 
_COM_STATUS 	3 	Request status 
_bios_serialcom Data Values

Declared in: bios.h

Name 			Value 		Meaning
_COM_110 		0x00 		110 baud 
_COM_NOPARITY 		0x00 		No parity 
_COM_STOP1 		0x00 		1 stop bit 
_COM_CHR7 `		0x02 		7 data bits 
_COM_CHR8 		0x03 		8 data bits 
_COM_STOP2 		0x04 		2 stop bits 
_COM_ODDPARITY	 	0x08 		Odd parity 
_COM_EVENPARITY 	0x18 		Even parity 
_COM_150 		0x20 		150 baud 
_COM_300 		0x40 		300 baud 
_COM_600 		0x60 		600 baud 
_COM_1200 		0x80 		1200 baud 
_COM_2400 		0xa0 		2400 baud 
_COM_4800 		0xc0 		4800 baud 
_COM_9600 		0xe0 		9600 baud 
_bios_timeofday Service Values

Declared in: bios.h

Name			Value		Meaning
_TIME_GETCLOCK 		0 		Retrieve time
_TIME_SETCLOCK 		1 		Set time 
clock Values

Declared in: time.h

To convert from ticks to seconds, divide the clock_t value returned from the clock function by CLOCKS_PER_SEC.

Name 			Value 		Meaning
CLOCKS_PER_SEC 		100 		Number of timer ticks per second 
CLK_TCK 		100 		Synonym of CLOCKS_PER_SEC 
cpumode Values

Declared in: stdlib.h

Name 			Value 		Meaning
_REAL_MODE 		0 		Running in real mode 
_PROT_MODE 		1 		Running in protected mode 
disp_setattr Display Attribute Values

Declared in: disp.h

Name 			Value 		Meaning
DISP_NONDISPLAY 	0x00 		Non-displaying attribute 
DISP_UNDERLINE 		0x01 		Underline attribute 
DISP_NORMAL 		0x07 		Normal attribute 
DISP_INTENSITY 		0x08 		Intensity attribute 
DISP-REVERSEVIDEO 	0x70 		Reverse video attribute 
DISP_BLINK 		0x80 		Blink attribute
disp_setcursortype Standard Cursor Types

Declared in: disp.h

For monochrome/ color values:

Name 			Value 			Meaning
DISP_CURSORBLOCK 	0x000c/0x0007 		Block cursor 
DISP_CURSORHALF 	0x060c/0x0307 		Half cursor 
DISP_CURSORUL 		0x0b0c/0x0707 		Underline cursor 
EMM Page Size

Declared in: emm.h

Name 		Value 		Meaning
EMM_PAGESIZE 	0x4000 		Size of an EMM page 
errno Values

Declared in: errno.h and other header files

Name 		Value 		Meaning
EZERO 		0 		No error 
EPERM 		1 		Operation not permitted 
ENOENT 		2 		No such file or directory 
ESRCH 		3 		No such process 
EINTR 		4 		Interrupted function call 
EIO 		5 		Input/ output error 
ENXIO 		6 		No such device or address 
E2BIG 		7 		Argument list too long 
ENOEXEC 	8 		Exec format error 
EBADF 		9 		Bad file descriptor 
ECHILD 		10 		No child processes 
EAGAIN 		11 		Resource temporarily unavailable 
ENOMEM 		12 		Not enough space 
EACCES 		13 		Permission denied 
EFAULT 		14 		Bad address 
EBUSY 		16 		Resource device 
EEXIST 		17 		File exists 
EXDEV 		18 		Improper link 
ENODEV 		19 		No such device 
ENOTDIR 	20 		Not a directory 
EISDIR 		21 		Is a directory 
EINVAL 		22 		Invalid argument 
ENFILE 		23 		Too many open files in system 
EMFILE 		24 		Too many open files 
ENOTTY 		25 		Inappropriate I/ O control operation 
EFBIG 		27 		File too large 
ENOSPC 		28 		No space left on device 
ESPIPE 		29 		Invalid seek 
EROFS 		30 		Read-only file system 
EMLINK 		31 		Too many links 
EPIPE 		32 		Broken pipe 
EDOM 		33 		Domain error 
ERANGE 		34 		Result too large 
EDEADLK 	36 		Resource deadlock avoided 
EDEADLOCK 	36 		Synonym of EDEADLK 
ENAMETOOLONG 	38 		Filename too long 
ENOLCK 		39 		No locks available 
ENOSYS 		40 		Function not implemented 
ENOTEMPTY 	41 		Directory not empty 
EILSEQ 		42 		Illegal byte sequence 
exit ANSI-Standard Return Values

Declared in: stdlib.h

Name 		Value 		Meaning
EXIT_SUCCESS 	0 		Successful termination 
EXIT_FAILURE 	1 		Unsuccessful termination 
File Attributes

Declared in: dos.h

Several functions,, including _dos_creat and _dos_findfirst, use these attributes. Note that some values, which can be used when searching, cannot be used when creating a file. Examples are _A_VOLID and _A_SUBDIR: a volume ID or a subdirectory cannot be created with _dos_creat, only a file can be created.

Name 			Value 		Meaning
_A_NORMAL 		0x00 		Normal file 
_A_RDONLY 		0x01 		Read-only file 
_A_HIDDEN 		0x02 		Hidden file 
_A_SYSTEM 		0x04 		System file 
_A_VOLID 		0x08 		Volume ID 
_A_SUBDIR 		0x10 		Subdirectory 
_A_ARCH 		0x20 		File changed since last archive 
FA_NORMAL 		0x00 		Synonym of _A_NORMAL 
FA_RDONLY 		0x01 		Synonym of _A_RDONLY 
FA_HIDDEN 		0x02 		Synonym of _A_HIDDEN 
FA_SYSTEM 		0x04 		Synonym of _A_SYSTEM 
FA_LABEL 		0x08 		Synonym of _A_VOLID 
FA_DIREC 		0x10 		Synonym of _A_SUBDIR 
FA_ARCH 		0x20 		Synonym of _A_ARCH 
Floating-Point Number Classifications

Declared in: fltpnt.h

Name 		Value 		Meaning
FP_NANS 	0 		Signaling NaN 
FP_NANQ 	1 		Quiet NaN 
FP_INFINITE 	2 		Infinity 
FP_NORMAL 	3 		Any number not covered by other 
				classifications 
FP_SUBNORMAL 	4 		Subnormal or denormal 
FP_ZERO 	5 		Zero 
Floating-Point Exceptions

Declared in: fltenv.h

Name 			Value 		Meaning
FE_INVALID 		0x01 		Invalid operand or operation 
FE_DIVBYZERO 		0x04 		Divide by zero 
FE_OVERFLOW 		0x08 		Overflow 
FE_UNDERFLOW 		0x10 		Underflow 
FE_INEXACT 		0x20 		Inexact result 
FE_ALL_EXCEPT	 	0x3F 		All exceptions
Floating-Point Precision Values

Declared in: fltenv.h

Name 			Value 		Meaning
FE_FLTPREC 		0x0000 		Use float (32-bit) precision 
FE_DBLPREC 		0x0200 		Use double (64-bit) precision 
FE_LDBLPREC 		0x0300 		Use long double (80-bit) precision
Floating-Point Rounding Values

Declared in: fltenv.h

Name 			Value 		Meaning
FE_TONEAREST 		0x0000 		Round to nearest value 
FE_DOWNWARD 		0x0400 		Round toward negative infinity 
FE_UPWARD 		0x0800 		Round toward positive infinity 
FE_TOWARDZERO 		0x0c00 		Round toward zero (drop 
					fractional part)
Floating-Point Special Values

Declared in: fltenv.h

Name 			Meaning
INFINITY 		The value of positive infinity 
NAN 			The value of a quiet NaN 
NANS 			The value of a signaling NaN 
Floating-Point Characteristic Constants

Declared in: float.h

Name 			Value 				Meaning
DBL_MIN_EXP 		-1021 				Smallest exponent 
							value for a double, 
							using base 
							FLT_RADIX 
LDBL_MIN_EXP 		-1021 				Smallest exponent 
							value for a long 
							double, using base 
							FLT_RADIX 
DBL_DIG 		15 				Number of decimal 
							digits accurately 
							represented by a 
							double 
DBL_EPSILON 		2.2204460492501131e-16	 	Smallest difference 
							between two doubles 
DBL_MANT_DIG 		53 				Number of 
							base-FLT_RADIX 
							digits in the 
							significand of a 
							double (number of 
							binary digits in the 
							significand) 
DBL_MAX 		1.7976931348623157e+308 	Largest positive value 
							represented by a 
							double 
DBL_MAX_10_EXP 		308 				Largest exponent for 
							a double, using base 
							10 
DBL_MAX_EXP 		1024 				Largest exponent 
							value for a double, 
							using base 
							FLT_RADIX 
DBL_MIN 		2.225073855072014e-308	 	Smallest positive 
							value represented by 
							a double 
DBL_MIN_10_EXP 		-307 				Smallest exponent 
							for a double, using 
							base 10 
FLT_DIG 		6 				Number of decimal 
							digitals represented 
							by a float 
FLT_EPSILON 		1.1920929e-7f 			Smallest difference 
							between two floats 
FLT_MANT_DIG		24 				Number of base 
							FLT_RADIX digits in 
							significand of float 
							(number of binary 
							digits in significand) 
FLT_MAX 		3.402823466e+38F 		Largest positive value 
							represented by a float 
FLT_MAX_10_EXP 		38 				Largest exponent 
							value for a float, 
							using base 10 
FLT_MAX_EXP 		128 				Largest exponent 
							value for a float, 
							using base 
FLT_RADIX 
FLT_MIN 		1.175494351e-38 		Smallest positive 
							value represented by 
							a float 
FLT_MIN_10_EXP 		-37 				Smallest exponent 
							value for a float, 
							using base 10 
FLT_MIN_EXP 		-125 				Smallest exponent 
							value for a float, 
							using base 
							FLT_RADIX 
FLT_RADIX 		2 				Radix used to 
							represent floating 
							point numbers 
LDBL_DIG 		15 				Number of decimal 
							digits represented by 
							a long double 
LDBL_EPSILON 		2.2204460492501131e-16	 	Smallest difference 
							between two long 
							doubles 
LDBL_MANT_DIG 		53 				Number of base 
							FLT_RADIX digits in 
							significand of a long 
							double (number of 
							binary digits in 
							significand) 
LDBL_MAX 		1.7976931348623157e+308 	Largest positive value 
							represented by a 
							long double 
LDBL_MAX_10_EXP 	308 				Largest exponent 
							value for a long 
							double, using base 10 
LDBL_MAX_EXP 		1024 				Largest exponent 
							value for a long 
							double, using base 
							FLT_RADIX 
LDBL_MIN 		2.2250738585072014e-308 	Smallest positive 
							value represented by 
							a long double 
LDBL_MIN_10_EXP 	-307 				Smallest exponent 
							value for a long 
							double, using base 10 
fnsplit Return Values

Declared in: dir.h

Name 		Value 		Meaning
EXTENSION 	0x02 		An extension was found 
FILENAME 	0x04 		A filename was found 
DIRECTORY 	0x08 		A directory was found 
DRIVE 		0x10 		A drive was found 
fnsplit Maximum Size of Components

Declared in: dir.h

Name 		Value 		Meaning
MAXDRIVE 	3 		Largest drive identifier 
MAXEXT 		5 		Largest extension 
MAXFILE 	6 		Largest filename 
MAXDIR 		66 		Largest directory name 
MAXPATH 	80 		Largest pathname 
_getch and _getche Extended Key Codes

Declared in: conio.h

To return a key with no ASCII value, such as a function key, _getch returns a 0 or 0xe0 followed by one of these codes:

Name 		Value 		Meaning
_KB_BACK_TAB	15 		Backtab 
_KB_F1 		59 		F1 
_KB_F2 		60 		F2 
_KB_F3 		61 		F3 
_KB_F4 		62 		F4 
_KB_F5 		63 		F5 
_KB_F6 		64 		F6 
_KB_F7 		65 		F7 
_KB_F8 		66 		F8 
_KB_F9 		67 		F9 
_KB_F10 	68 		F10 
_KB_HOME 	71 		Home 
_KB_UP 		72 		Up arrow 
_KB_PGUP 	73 		Page up 
_KB_LEFT 	75 		Left arrow 
_KB_RIGHT 	77 		Right arrow 
_KB_END 	79 		End 
_KB_DOWN 	80 		Down arrow 
_KB_PGDN 	81 		Page down 
_KB_INS 	82 		Insert 
_KB_DEL 	83 		Delete 
_KB_SF1 	84 		Shift-F1 
_KB_SF2 	85 		Shift-F2 
_KB_SF3 	86 		Shift-F3 
_KB_SF4 	87 		Shift-F4 
_KB_SF5 	88 		Shift-F5 
_KB_SF6 	89 		Shift-F6 
_KB_SF7 	90 		Shift-F7 
_KB_SF8 	91 		Shift-F8 
_KB_SF9 	92 		Shift-F9 
_KB_SF10 	93 		Shift-F10 
_KB_CF1 	94 		Control-F1 
_KB_CF2 	95 		Control-F2 
_KB_CF3 	96 		Control-F3 
_KB_CF4 	97 		Control-F4 
_KB_CF5 	98 		Control-F5 
_KB_CF6 	99 		Control-F6 
_KB_CF7 	100 		Control-F7 
_KB_CF8 	101 		Control-F8 
_KB_CF9 	102 		Control-F9 
_KB_CF10 	103 		Control-F10 
_KB_AF1 	104 		Alt-F1 
_KB_AF2 	105		Alt-F2 
_KB_AF3 	106 		Alt-F3 
_KB_AF4 	107 		Alt-F4 
_KB_AF5 	108 		Alt-F5 
_KB_AF6 	109 		Alt-F6 
_KB_AF7 	110 		Alt-F7 
_KB_AF8 	111 		Alt-F8 
_KB_AF9 	112 		Alt-F9 
_KB_AF10 	113 		Alt-F10 
_KB_CLEFT 	115 		Control-left arrow 
_KB_CRIGHT 	116 		Control-right arrow 
_KB_CEND 	117 		Control-end 
_KB_CPGDN 	118 		Control-page down 
_KB_CHOME 	119 		Control-home 
_KB_A1	 	120 		Alt-1 
_KB_A2 		121 		Alt-2 
_KB_A3 		122 		Alt-3 
_KB_A4 		123 		Alt-4 
_KB_A5 		124 		Alt-5 
_KB_A6 		125 		Alt-6 
_KB_A7 		126 		Alt-7 
_KB_A8 		127 		Alt-8 
_KB_A9 		128 		Alt-9 
_KB_A0 		129 		Alt-0 
_KB_AMINUS 	130 		Alt-minus 
_KB_APLUS 	131 		Alt-plus 
_KB_CPGUP 	132 		Control-page up 
_hardresume Result Codes

Declared in: dos.h

Name 			Value 		Meaning
_HARDERR_IGNORE 	0 		Ignore error 
_HARDERR_RETRY 		1 		Retry operation 
_HARDERR_ABORT 		2 		Abort program 
_HARDERR_FAIL 		3 		Fail system call
HUGE_VAL

Declared in: math.h

Name 		Value 		Meaning
HUGE_VAL 	infinity 	Double value represents overflow 
Integer Sizes

Declared in: limits.h

Name 		Value 		Meaning 
CHAR_BIT 	8 		Number of bits in char 
CHAR_MAX 	255 or 127 	Largest char, depends on sign 
CHAR_MIN 	0 or -127 	Smallest char, depends on sign 
INT_MAX 	2147483647 or 	Largest int, depends on size
		32767 	
INT_MIN	 	-2147483647 or	Smallest int, depends on size	
		-32767 
LONG_MAX 	2147483647 	Largest long 
LONG_MIN 	-2147483647 	Smallest long 
MB_LEN_MAX 	2 		Longest multi-byte char 
SCHAR_MAX 	127 		Largest signed char 
SCHAR_MIN 	-127 		Smallest signed char 
SHRT_MAX 	32767 		Largest short 
SHRT_MIN 	-32767 		Smallest short 
UCHAR_MAX 	255 		Largest unsigned char 
UINT_MAX 	65535 or 	Largest unsigned int, depends 
		4294967295 	on size
USHRT_MAX 	65535 		Largest unsigned short 	 
_locking Mode Values

Declared in: sys\locking.h

Name 		Value		Meaning
_LK_UNLCK 	0 		Unlock 
_LK_LOCK 	1 		Lock with retry 
_LK_NBLCK 	2 		Lock without retry 
_LK_RLCK 	3 		Same as _LK_LOCK 
_LK_NBRLCK 	4 		Same as _LK_NBLCK 
LK_UNLCK 	0 		Synonym of _LK_UNLCK 
LK_LOCK 	1 		Synonym of _LK_LOCK 
LK_NBLCK 	2 		Synonym of _LK_NBLCK 
LK_RLCK 	3 		Synonym of _LK_RLCK 
LK_NBRLCK 	4 		Synonym of _LK_NBRLCK 
_matherr Exception Types

Declared in: math.h

Name 		Value 		Meaning
_DOMAIN 	1 		Domain error 
_SIGN 		2 		Argument singularity 
_OVERFLOW 	3 		Overflow range error 
_UNDERFLOW 	4 		Result too small 
_TLOSS 		5 		Total loss of significance 
_PLOSS 		6 		Partial loss of significance 
DOMAIN 		1 		Synonym of _DOMAIN 
SING 		2 		Synonym of _SING 
OVERFLOW 	3 		Synonym of _OVERFLOW 
UNDERFLOW 	4 		Synonym of _UNDERFLOW 
TLOSS 		5 		Synonym of _TLOSS 
PLOSS 		6 		Synonym of _PLOSS 
Multi-byte Characters

Declared in: stdlib.h

Name 		Value 		Meaning
MB_CUR_MAX 	1 		Largest number of bytes in a multi-byte 
				character for the current locale 
_open Flag Values

Declared in: fcntl.h

Name 			Value 		Meaning
_O_RDONLY 		0x0000 		Read from file only 
_O_WRONLY 		0x0001 		Write to file only 
_O_RDWR 		0x0002 		Read and write from file 
_O_APPEND 		0x0008 		Write only at end of file 
_O_CREAT 		0x0100 		Create the file 
_O_TRUNC 		0x0200 		Truncate file 
_O_EXCL 		0x0400 		Fail if file exists 
_O_TEXT 		0x4000 		Use translated mode 
_O_BINARY 		0x8000 		Use untranslated mode 
O_RDONLY 		0x0000 		Synonym of _O_RDONLY 
O_WRONLY 		0x0001 		Synonym of _O_WRONLY 
O_RDWR 			0x0002 		Synonym of _O_RDWR 
O_APPEND 		0x0008 		Synonym of _O_APPEND 
O_CREAT 		0x0100 		Synonym of _O_CREAT 
O_TRUNC 		0x0200 		Synonym of _O_TRUNC 
O_EXCL 			0x0400 		Synonym of _O_EXCL 
O_TEXT 			0x4000 		Synonym of _O_TEXT 
O_BINARY 		0x8000 		Synonym of _O_BINARY 
_O_RAW 			0x8000 		Synonym of _O_BINARY
_osmode Values

Declared in: stdlib.h

Name 		Value 		Meaning
_DOS_MODE 	0 		DOS is running 
_WIN_MODE 	2 		Windows is running 
Random Numbers

Declared in: stdlib.h

Name 		Value 		Meaning
RAND_MAX 	32767 		Largest number returned by the 
				rand function 
Seek Origins

Declared in: io.h and stdio.h

Seek origins are used by fseek and _lseek.

Name 		Value 		Meaning
SEEK_SET 	0 		Seek relative to beginning of file 
SEEK_CUR	1 		Seek relative to current position 
SEEK_END 	2 		Seek relative to end of file 
setlocal Categories

Declared in: locale.h

Name 		Value 		Meaning
LC_ALL	 	0 		All categories 
LC_COLLATE 	1 		Collating sequence 
LC_CTYPE 	2 		Character types 
LC_MONETARY 	3 		Monetary formatting 
LC_NUMERIC 	4 		Number formatting 
LC_TIME 	5 		Time formatting 
setvbuf Modes

Declared in: stdio.h

Name 		Value 		Meaning
_IOFBF 		0x0000 		Full buffering 
_IONBF 		0x0004 		No buffering 
_IOLBF 		0x0040 		Line buffering 
signal Codes

Declared in: signal.h

Name 		Value 		Meaning
SIGINT 		2 		Interrupt 
SIGILL 		4 		Illegal instruction 
SIGBREAK 	6 		Control-break 
SIGFPE		8 		Math error 
SIGSEGV 	11 		Segmentation violation 
SIGTERM		15 		Program termination request 
SIGABRT 	22 		Abnormal termination 
NSIG 		23 		The number of signals 
signal Functions

Declared in: signal.h

Name 		Value 		Meaning
SIG_ERR 	-1 		Signal could not be handled 
SIG_DFL 	0 		Default signal handling 
SIG_IGN 	1 		Ignore signal 
_sopen Sharing Flag Values

Declared in: share.h

Name 		Value 		Meaning
_SH_COMPAT 	0x00 		Compatibility mode 
_SH_DENYRW 	0x10 		Deny all access while file is open 
_SH_DENYWR 	0x20 		Deny write access while file is open 
_SH_DENYRD 	0x30 		Deny read access while file is open 
_SH_DENYNO 	0x40 		Allow read/ write access while file is open 
SH_COMPAT 	0x00 		Synonym of _SH_COMPAT 
SH_DENYRW 	0x10 		Synonym of _SH_DENYRW 
SH_DENYWR 	0x20 		Synonym of _SH_DENYWR 
SH_DENYRD 	0x30 		Synonym of _SH_DENYRD 
SH_DENYNO 	0x40 		Synonym of _SH_DENYNO
spawn Modes

Declared in: process.h

Name 		Value 		Meaning
_P_WAIT 	0 		Wait for child process to complate 
_P_OVERLAY 	2 		Replace current process with child process 
P_WAIT 		0 		Synonym of _P_WAIT 
P_OVERLAY	2 		Synonym of _P_OVERLAY 
_splitpath Buffer Sizes

Declared in: stdlib.h

Name 		Value 		Meaning
_MAX_DIR 	256 		Largest directory 
_MAX_EXT 	256 		Largest extension 
_MAX_FNAME 	256 		Largest filename 
_MAX_PATH 	260 		Largest path 
_MAX_DRIVE 	3 		Largest drive
_stat st_mode Values

Declared in: sys\stat.h

Name 		Value 		Meaning
_S_IEXEC 	0x0040 		Handle refers to an executable file 
_S_IWRITE 	0x0080 		Path or handle refers to a writable file 
_S_IREAD 	0x0100 		Path or handle refers to a readable file 
_S_IFCHR	0x2000 		Handle refers to a character device 
_S_IFDIR 	0x4000 		Path refers to a directory 
_S_IFREG 	0x8000 		Path or handle refers to a regular file 
S_IEXEC 	0x0040 		Synonym of _S_IEXEC 
S_IREAD 	0x0100 		Synonym of _S_IREAD 
S_IFCHR 	0x2000 		Synonym of _S_IFCHR 
S_IFIDR 	0x4000 		Synonym of _S_IFDIR 
S_IFREG 	0x8000 		Synonym of _S_IFREG 
stdio.h Miscellaneous Values

Declared in: stdio.h


Name 		Value 		Meaning
EOF 		-1 		End of file value 
FOPEN_MAX 	20 		Largest number of files that can be 
				open at once 
_NFILE 		40 or 60 	Number of file handles, 60 for Win32 
FILENAME_MAX 	79 		Largest filename 
BUFSIZ 		0x4000 		Size of a buffer used by setbuf
Swap Error Codes

Declared in: swap.h

Name 			Value 		Meaning
SWAP_FREEMEMERROR 	-2 		DOS refuses to shrink the primary 
					memory block allocated for the 
					program 
SWAP_NOVMSPACE 		-3 		Disk drive has no room to write 
					program's image 
Temporary Files

Declared in: stdio.h

Name 		Value 		Meaning
P_tmpdir 	"\\" 		Directory used for temporary files by 
				tmpnam function 
L_tmpnam 	16 		Largest filename generated by tmpfile 
				function 
TMP_MAX 	32767 		Largest number of unique file names 
				generated by tmpnam function 
tsr_install Arguments

Declared in: tsr.h

Name 		Value 		Meaning
TIMESLICE 	1 		Timeslice TSR 
TSR_DEBUG 	2 		Debug TSR 
POPONLY 			Popup TSR 
TSR Scancodes

Declared in: tsr.h

Name 		Value 		Meaning 
NO_SCAN 	0 		No scancode 
RSHIFT 		1 		Right shift 
LSHIFT 		2 		Left shift 
CTRL 		4		Control 
ALT 		8 		Alt 
SCAN_Q 		16 		Q 
SCAN_W 		17 		W 
SCAN_E 		18 		E 
SCAN_R 		19 		R 
SCAN_T 		20 		T 
SCAN_Y 		21 		Y 
SCAN_U 		22 		U 
SCAN_I 		23 		I 
SCAN_O 		24 		O 
SCAN_P 		25 		P 
SCAN_A 		30 		A 
SCAN_S 		31 		S 
SCAN_D 		32 		D 
SCAN_F 		33 		F 
SCAN_G 		34 		G 
SCAN_H 		35 		H 
SCAN_J 		36 		J 
SCAN_K 		37 		K 
SCAN_L 		38 		L 
SCAN_Z 		44 		Z 
SCAN_X 		45 		X 
SCAN_C 		46 		C 
SCAN_V 		47 		V
SCAN_B 		48 		B 
SCAN_N 		49 		N 
SCAN_M 		50 		M 
SCAN_F1 	59 		F1 
SCAN_F2 	60 		F2 
SCAN_F3 	61 		F3 
SCAN_F4 	62 		F4 
SCAN_F5 	63 		F5 
SCAN_F6 	64 		F6 
SCAN_F7 	65 		F7 
SCAN_F8 	66 		F8 
SCAN_F9 	67 		F9 
SCAN_F10 	68 		F10