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+{
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+ $Id$
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+ Copyright (c) 2002 by Marco van de Voort
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+
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+ The base Linux syscalls required to implement the system unit. These
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+ are aliased for use in other units (to avoid poluting the system units
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+ interface)
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+
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+ See the file COPYING.FPC, included in this distribution,
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+ for details about the copyright.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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+
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+ ****************************************************************************
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+}
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+
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+{$ifdef uselibc}
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+{$else}
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+
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+{*****************************************************************************
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+ --- Main:The System Call Self ---
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+*****************************************************************************}
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+
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+{$I ostypes.inc}
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+{$I syscallh.inc}
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+{$I syscall.inc}
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+{$I sysnr.inc}
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+{$I bunxmacr.inc}
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+
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+function Fptime(tloc:pTime): TTime; [public, alias : 'FPC_SYSC_TIME'];
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+
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+begin
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+ Fptime:=do_syscall(syscall_nr_time,TSysParam(tloc));
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+End;
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+
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+{*****************************************************************************
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+ --- File:File handling related calls ---
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+*****************************************************************************}
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+
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+function Fpopen(path: pchar; flags : cint; mode: mode_t):cint; [public, alias : 'FPC_SYSC_OPEN'];
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+
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+Begin
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+ Fpopen:=do_syscall(syscall_nr_open,TSysParam(path),TSysParam(flags),TSysParam(mode));
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+End;
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+
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+function Fpclose(fd : cint): cint;
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+
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+begin
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+ Fpclose:=do_syscall(syscall_nr_close,fd);
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+end;
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+
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+function Fplseek(fd : cint; offset : off_t; whence : cint): off_t; [public, alias : 'FPC_SYSC_LSEEK'];
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+{
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+Must be adapted/overloaded for 64-bit support, but that is a different call under
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+Linux?
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+}
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+begin
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+ Fplseek:=do_syscall(syscall_nr_lseek,tsysparam(fd),tsysparam(offset),tsysparam(whence));
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+end;
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+
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+function Fpread(fd: cint; buf: pchar; nbytes : size_t): ssize_t; [public, alias : 'FPC_SYSC_READ'];
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+
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+begin
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+ Fpread:=do_syscall(syscall_nr_read,Fd,TSysParam(buf),nbytes);
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+end;
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+
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+function Fpwrite(fd: cint;buf:pchar; nbytes : size_t): ssize_t; [public, alias : 'FPC_SYSC_WRITE'];
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+
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+begin
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+ Fpwrite:=do_syscall(syscall_nr_write,Fd,TSysParam(buf),nbytes);
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+end;
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+
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+function Fpunlink(path: pchar): cint; [public, alias : 'FPC_SYSC_UNLINK'];
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+
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+begin
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+ Fpunlink:=do_syscall(syscall_nr_unlink,TSysParam(path));
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+end;
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+
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+function Fprename(old : pchar; newpath: pchar): cint; [public, alias : 'FPC_SYSC_RENAME'];
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+
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+begin
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+ Fprename:=do_syscall(syscall_nr_rename,TSysParam(old),TSysParam(newpath));
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+end;
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+
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+function Fpstat(path: pchar; var buf : stat):cint; [public, alias : 'FPC_SYSC_STAT'];
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+
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+begin
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+ Fpstat:=do_syscall(syscall_nr_stat,TSysParam(path),TSysParam(@buf));
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+end;
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+
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+
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+{*****************************************************************************
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+ --- Directory:Directory related calls ---
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+*****************************************************************************}
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+
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+function Fpchdir(path : pchar): cint; [public, alias : 'FPC_SYSC_CHDIR'];
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+
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+begin
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+ Fpchdir:=do_syscall(syscall_nr_chdir,TSysParam(path));
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+end;
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+
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+function Fpmkdir(path : pchar; mode: mode_t):cint; [public, alias : 'FPC_SYSC_MKDIR'];
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+
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+begin
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+ Fpmkdir:=do_syscall(syscall_nr_mkdir,TSysParam(path),TSysParam(mode));
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+end;
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+
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+function Fprmdir(path : pchar): cint; [public, alias : 'FPC_SYSC_RMDIR'];
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+
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+begin
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+ Fprmdir:=do_syscall(syscall_nr_rmdir,TSysParam(path));
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+end;
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+
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+function Fpopendir(dirname : pchar): pdir; [public, alias : 'FPC_SYSC_OPENDIR'];
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+
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+var
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+ fd:integer;
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+ st:stat;
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+ ptr:pdir;
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+
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+begin
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+ Fpopendir:=nil;
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+ if Fpstat(dirname,st)<0 then
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+ exit;
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+{ Is it a dir ? }
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+ if not((st.st_mode and $f000)=$4000)then
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+ begin
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+ errno:=ESysENOTDIR;
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+ exit
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+ end;
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+{ Open it}
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+ fd:=Fpopen(dirname,O_RDONLY,438);
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+ if fd<0 then
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+ exit;
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+ new(ptr);
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+ if ptr=nil then
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+ exit;
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+ getmem(ptr^.buf,sizeof(dirent));
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+ if ptr^.buf=nil then
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+ exit;
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+ ptr^.fd:=fd;
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+ ptr^.loc:=0;
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+ ptr^.size:=0;
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+ ptr^.dd_max:=sizeof(ptr^.buf^);
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+ Fpopendir:=ptr;
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+end;
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+
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+function Fpclosedir(dirp : pdir): cint; [public, alias : 'FPC_SYSC_CLOSEDIR'];
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+
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+begin
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+ Fpclosedir:=Fpclose(dirp^.fd);
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+ freemem(dirp^.buf,sizeof(dirent));
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+ dispose(dirp);
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+end;
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+
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+function Fpreaddir(dirp : pdir) : pdirent; [public, alias : 'FPC_SYSC_READDIR'];
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+
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+{Different from Linux, Readdir on BSD is based on Getdents, due to the
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+missing of the readdir syscall.
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+Getdents requires the buffer to be larger than the blocksize.
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+This usually the sectorsize =512 bytes, but maybe tapedrives and harddisks
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+with blockmode have this higher?}
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+
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+begin
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+ if do_SysCall(SysCall_nr_readdir,TSysParam(dirp^.fd),TSysParam(dirp^.buf),TSysParam(1))=0 Then
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+{ the readdir system call returns the number of bytes written }
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+ Fpreaddir:=nil
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+ else
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+ Fpreaddir:=dirp^.buf
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+end;
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+
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+{*****************************************************************************
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+ --- Process:Process & program handling - related calls ---
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+*****************************************************************************}
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+
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+procedure Fpexit(status : cint); [public, alias : 'FPC_SYSC_EXIT'];
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+
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+begin
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+ do_syscall(syscall_nr_exit,status);
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+end;
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+
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+{
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+ Change action of process upon receipt of a signal.
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+ Signum specifies the signal (all except SigKill and SigStop).
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+ If Act is non-nil, it is used to specify the new action.
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+ If OldAct is non-nil the previous action is saved there.
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+}
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+
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+function Fpsigaction(sig: cint; act : psigactionrec; oact : psigactionrec): cint; [public, alias : 'FPC_SYSC_SIGACTION'];
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+
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+{
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+ Change action of process upon receipt of a signal.
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+ Signum specifies the signal (all except SigKill and SigStop).
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+ If Act is non-nil, it is used to specify the new action.
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+ If OldAct is non-nil the previous action is saved there.
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+}
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+
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+begin
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+ do_syscall(syscall_nr_sigaction,TSysParam(sig),TSysParam(act),TSysParam(oact));
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+end;
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+
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+function Fpftruncate(fd : cint; flength : off_t): cint; [public, alias : 'FPC_SYSC_FTRUNCATE'];
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+{ See notes lseek. This one is completely similar for the parameter (but
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+doesn't have the returnvalue 64-bit problem)}
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+
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+begin
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+ Fpftruncate:=Do_syscall(syscall_nr_ftruncate,TSysParam(fd),TSysParam(flength));
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+end;
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+
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+function Fpfstat(fd : cint; var sb : stat): cint; [public, alias : 'FPC_SYSC_FSTAT'];
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+
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+begin
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+ FpFStat:=do_SysCall(syscall_nr_fstat,TSysParam(fd),TSysParam(@sb));
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+end;
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+
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+
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+function Fpfork : pid_t; [public, alias : 'FPC_SYSC_FORK'];
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+{
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+ This function issues the 'fork' System call. the program is duplicated in memory
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+ and Execution continues in parent and child process.
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+ In the parent process, fork returns the PID of the child. In the child process,
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+ zero is returned.
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+ A negative value indicates that an error has occurred, the error is returned in
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+ LinuxError.
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+}
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+
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+Begin
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+ Fpfork:=Do_syscall(SysCall_nr_fork);
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+End;
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+
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+// Look at execve variants later, when overloaded is determined.
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+{
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+function Fpexecve(path : pathstr; argv : ppchar; envp: ppchar): cint;
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+}
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+{
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+ Replaces the current program by the program specified in path,
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+ arguments in args are passed to Execve.
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+ environment specified in ep is passed on.
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+}
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+
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+{
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+Begin
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+ path:=path+#0;
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+ do_syscall(syscall_nr_Execve,TSysParam(@path[1]),TSysParam(Argv),TSysParam(envp));
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+End;
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+}
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+{
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+function Fpexecve(path : pchar; argv : ppchar; envp: ppchar): cint; [public, alias : 'FPC_SYSC_EXECVE'];
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+}
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+{
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+ Replaces the current program by the program specified in path,
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+ arguments in args are passed to Execve.
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+ environment specified in ep is passed on.
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+}
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+{
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+Begin
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+ do_syscall(syscall_nr_Execve,TSysParam(path),TSysParam(Argv),TSysParam(envp));
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+End;
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+}
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+
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+function Fpwaitpid(pid : pid_t; stat_loc : pcint; options: cint): pid_t; [public, alias : 'FPC_SYSC_WAITPID'];
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+{
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+ Waits until a child with PID Pid exits, or returns if it is exited already.
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+ Any resources used by the child are freed.
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+ The exit status is reported in the adress referred to by Status. It should
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+ be a longint.
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+}
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+
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+begin
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+ FpWaitPID:=do_syscall(syscall_nr_WaitPID,PID,TSysParam(Stat_loc),options);
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+end;
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+
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+function Fpaccess(pathname : pchar; amode : cint): cint; [public, alias : 'FPC_SYSC_ACCESS'];
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+{
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+ Test users access rights on the specified file.
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+ Mode is a mask xosisting of one or more of R_OK, W_OK, X_OK, F_OK.
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+ R,W,X stand for read,write and Execute access, simultaneously.
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+ F_OK checks whether the test would be allowed on the file.
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+ i.e. It checks the search permissions in all directory components
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+ of the path.
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+ The test is done with the real user-ID, instead of the effective.
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+ If access is denied, or an error occurred, false is returned.
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+ If access is granted, true is returned.
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+ Errors other than no access,are reported in unixerror.
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+}
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+
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+begin
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+ FpAccess:=do_syscall(syscall_nr_access,TSysParam(pathname),amode);
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+end;
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+
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+{ overloaded
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+function Fpaccess(pathname : pathstr; amode : cint): cint;
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+
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+{
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+ Test users access rights on the specified file.
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+ Mode is a mask xosisting of one or more of R_OK, W_OK, X_OK, F_OK.
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+ R,W,X stand for read,write and Execute access, simultaneously.
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+ F_OK checks whether the test would be allowed on the file.
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+ i.e. It checks the search permissions in all directory components
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+ of the path.
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+ The test is done with the real user-ID, instead of the effective.
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+ If access is denied, or an error occurred, false is returned.
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+ If access is granted, true is returned.
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+ Errors other than no access,are reported in unixerror.
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+}
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+
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+begin
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+ pathname:=pathname+#0;
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+ Access:=do_syscall(syscall_nr_access, TSysParam(@pathname[1]),mode)=0;
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+end;
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+}
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+
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+Function FpDup(fildes:cint):cint; [public, alias : 'FPC_SYSC_DUP'];
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+
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+begin
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+ Fpdup:=Do_syscall(syscall_nr_dup,TSysParam(fildes));
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+end;
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+
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+Function FpDup2(fildes,fildes2:cint):cint; [public, alias : 'FPC_SYSC_DUP2'];
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+
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+begin
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+ Fpdup2:=do_syscall(syscall_nr_dup2,TSysParam(fildes),TSysParam(fildes2));
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+end;
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+
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+CONST
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+
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+ { Constansts for MMAP }
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+ MAP_PRIVATE =2;
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+ MAP_ANONYMOUS =$20;
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+
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+ {Constansts Termios/Ioctl (used in Do_IsDevice) }
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+ IOCtl_TCGETS=$5401; // TCGETS is also in termios.inc, but the sysunix needs only this
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+
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+type
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+ tmmapargs=packed record
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+ address : longint;
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+ size : longint;
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+ prot : longint;
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+ flags : longint;
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+ fd : longint;
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+ offset : longint;
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+ end;
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+
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+
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+Function Fpmmap(adr:pointer;len:size_t;prot:cint;flags:cint;fd:cint;off:off_t):pointer; [public, alias : 'FPC_SYSC_MMAP'];
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+// OFF_T procedure, and returns a pointer, NOT cint.
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+
|
|
|
|
+var
|
|
|
|
+ mmapargs : tmmapargs;
|
|
|
|
+begin
|
|
|
|
+ mmapargs.address:=TSysParam(adr);
|
|
|
|
+ mmapargs.size:=TSysParam(len);
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|
|
|
+ mmapargs.prot:=TSysParam(prot);
|
|
|
|
+ mmapargs.flags:=TSysParam(flags);
|
|
|
|
+ mmapargs.fd:=TSysParam(fd);
|
|
|
|
+ mmapargs.offset:=TSysParam(off);
|
|
|
|
+ Fpmmap:=pointer(do_syscall(syscall_nr_mmap,TSysParam(@MMapArgs)));
|
|
|
|
+end;
|
|
|
|
+
|
|
|
|
+Function Fpmunmap(adr:pointer;len:size_t):cint; [public, alias :'FPC_SYSC_MUNMAP'];
|
|
|
|
+begin
|
|
|
|
+ Fpmunmap:=do_syscall(syscall_nr_munmap,TSysParam(Adr),TSysParam(Len));
|
|
|
|
+end;
|
|
|
|
+
|
|
|
|
+Function sbrk(size : longint) : longint;
|
|
|
|
+begin
|
|
|
|
+ sbrk:=longint(Fpmmap(0,Size,3,MAP_PRIVATE+MAP_ANONYMOUS,-1,0));
|
|
|
|
+ if sbrk<>-1 then
|
|
|
|
+ errno:=0;
|
|
|
|
+ {! It must be -1, not 0 as before, see heap.inc. Should be in sysmmap?}
|
|
|
|
+end;
|
|
|
|
+
|
|
|
|
+{
|
|
|
|
+ Interface to Unix ioctl call.
|
|
|
|
+ Performs various operations on the filedescriptor Handle.
|
|
|
|
+ Ndx describes the operation to perform.
|
|
|
|
+ Data points to data needed for the Ndx function. The structure of this
|
|
|
|
+ data is function-dependent.
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
+// prototype is cint __P(cint,culong,....)
|
|
|
|
+// actual meaning of return value depends on request.
|
|
|
|
+
|
|
|
|
+Function FpIOCtl(fd:cint;request:culong;Data: Pointer):cint; [public, alias : 'FPC_SYSC_IOCTL'];
|
|
|
|
+// This was missing here, instead hardcoded in Do_IsDevice
|
|
|
|
+begin
|
|
|
|
+ FpIOCtl:=do_SysCall(syscall_nr_ioctl,tsysparam(fd),tsysparam(Request),TSysParam(data));
|
|
|
|
+end;
|
|
|
|
+
|
|
|
|
+Function Do_IsDevice(Handle:cint):boolean;
|
|
|
|
+{
|
|
|
|
+ Interface to Unix ioctl call.
|
|
|
|
+ Performs various operations on the filedescriptor Handle.
|
|
|
|
+ Ndx describes the operation to perform.
|
|
|
|
+ Data points to data needed for the Ndx function. The structure of this
|
|
|
|
+ data is function-dependent.
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
+var
|
|
|
|
+ Data : array[0..255] of byte; {Large enough for termios info}
|
|
|
|
+begin
|
|
|
|
+ Do_IsDevice:=(Fpioctl(handle,IOCTL_TCGETS,@data)<>-1);
|
|
|
|
+end;
|
|
|
|
+
|
|
|
|
+Function FpGetPid:pid_t; [public, alias : 'FPC_SYSC_GETPID'];
|
|
|
|
+{
|
|
|
|
+ Get Process ID.
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
+begin
|
|
|
|
+ FpGetPID:=do_syscall(syscall_nr_getpid);
|
|
|
|
+end;
|
|
|
|
+
|
|
|
|
+Function FpReadLink(name,linkname:pchar;maxlen:size_t):cint; [public, alias : 'FPC_SYSC_READLINK'];
|
|
|
|
+
|
|
|
|
+begin
|
|
|
|
+ Fpreadlink:=do_syscall(syscall_nr_readlink, TSysParam(name),TSysParam(linkname),maxlen);
|
|
|
|
+end;
|
|
|
|
+
|
|
|
|
+Function FpNanoSleep(const req : timespec;rem : ptimespec) : longint; [public, alias : 'FPC_SYSC_NANOSLEEP'];
|
|
|
|
+begin
|
|
|
|
+ FpNanoSleep:=Do_SysCall(syscall_nr_nanosleep,TSysParam(@req),TSysParam(rem));
|
|
|
|
+end;
|
|
|
|
+
|
|
|
|
+// The following belongs here, but this should be researched more.
|
|
|
|
+// function Fpgetcwd(pt:pchar; _size:size_t):pchar;[public, alias :'FPC_SYSC_GETCWD'];
|
|
|
|
+
|
|
|
|
+{$endif}
|
|
|
|
+
|
|
|
|
+{
|
|
|
|
+ $Log$
|
|
|
|
+ Revision 1.1 2002-12-18 16:43:26 marco
|
|
|
|
+ * new unix rtl, linux part.....
|
|
|
|
+
|
|
|
|
+ Revision 1.1 2002/11/12 14:40:18 marco
|
|
|
|
+ * The syscall core of the new system unit.
|
|
|
|
+
|
|
|
|
+
|
|
|
|
+}
|