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109 lines
3.1 KiB
Plaintext
109 lines
3.1 KiB
Plaintext
POSIX directory information
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---------------------------
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This directory contains the system call interface to
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POSIX compliant systems. These files should be
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completed by OS-specific files. This permits to
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easily create common and maintanable base
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runtime library units (such as dos and system).
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Limitations:
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------------
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- Only single byte character sets are supported (ASCII, ISO8859-1)
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- Path and filenames are limited to 255 characters
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(shortstrings are limited to 255 characters)
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Files in this directory
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posix.tem
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----------
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Posix unit template.
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dos.pp
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------
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POSIX compliant dos unit. The following routines
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and variables must be implemented / declared on
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a platform by platform basis:
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DiskFree()
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DiskSize()
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DosVersion()
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GetTimeZoneString(): Should return the string of
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the timezone information , as defined by POSIX,
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if not available, should return an empty string.
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This string is usually stored in the 'TZ' environment
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variable.
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GetTimeZoneFileName() : Should return the absolute path to
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the timezone filename to use to convert the UTC time to
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local time. The format of the timezone files are those
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specific in glibc.
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FixDriveStr : Array of pchar which contains
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the names of the fixed disks :
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(index 0 : current directory
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index 1 : first floppy disk
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index 2 : second floppy disk
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index 3 : boot disk
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)
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sysposix.inc
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------------
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Most of the specific operating system
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routines which can be implemented using
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the POSIX interface are implemented in
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this unit. This should be included in
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the target operating system system unit
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to create a complete system unit.
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Files required to port the compiler to a POSIX
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compliant system (should reside in the target
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OS directory):
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osposixh.inc : This includes all constants,
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type definitions and structures used
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(this is operating system dependant), except
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for those related to signals. It includes
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the signal file.
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osposix.inc : The actuall system call routines
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to the routine prototypes defined in posixh.inc.
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(either these can be an interface to a libc, or
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actual system calls).
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errno.inc : All possible error codes which
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can be returned by the operating system.
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signal.inc : Defines all constants and types
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related to signals, it must at least define
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the POSIX signal types and constants, but
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can also add other OS specific types and
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constants related to signals.
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Templates for the osposix.inc file (when linked
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with the GNU libc), errno.inc and osposixh.inc
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are included in this directory and have the
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extension .tem . They should be used as a basis
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to port to a new operating system.
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When sysposix.inc is used, the following system
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unit routines must be implemented for each new
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operating system, as they are not reproducable
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under the POSIX interface:
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function sbrk(size : longint): longint;
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procedure do_truncate (handle,pos:longint);
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function do_isdevice(handle:longint):boolean;
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When dos.pp is used, the following dos
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unit routines must be implemented for each new
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operating system, as they are not reproducable
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under the POSIX interface:
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function diskfree(drive : byte) : int64;
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function disksize(drive: byte) : int64;
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