1141 lines
24 KiB
C
1141 lines
24 KiB
C
/* $Id$
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Part of SWI-Prolog
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Author: Jan Wielemaker
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E-mail: J.Wielemaker@cs.vu.nl
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WWW: http://www.swi-prolog.org
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Copyright (C): 1985-2011, University of Amsterdam
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VU University Amsterdam
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "pl-incl.h"
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#include "pl-utf8.h"
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#include <stdio.h>
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef O_XOS
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#define statstruct struct _stati64
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#else
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#define statstruct struct stat
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#define statfunc stat
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#endif
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#undef LD
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#define LD LOCAL_LD
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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General file operations and binding to Prolog
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#ifdef __WINDOWS__
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static void
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set_posix_error(int win_error)
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{ int error = 0;
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switch(win_error)
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{ case ERROR_ACCESS_DENIED: error = EACCES; break;
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case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
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case ERROR_SHARING_VIOLATION: error = EAGAIN; break;
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case ERROR_ALREADY_EXISTS: error = EEXIST; break;
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}
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errno = error;
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}
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#endif /*__WINDOWS__*/
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/*******************************
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* OS STUFF *
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*******************************/
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/** int LastModifiedFile(const char *file, double *t)
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Return the last modification time of file as a POSIX timestamp. Returns
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(time_t)-1 on failure.
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Contains a 64-bit value representing the number of 100-nanosecond
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intervals since January 1, 1601 (UTC).
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*/
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int
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LastModifiedFile(const char *name, double *tp)
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{
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#ifdef __WINDOWS__
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HANDLE hFile;
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wchar_t wfile[MAXPATHLEN];
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#define nano * 0.000000001
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#define ntick 100.0
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#define SEC_TO_UNIX_EPOCH 11644473600.0
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if ( !_xos_os_filenameW(name, wfile, MAXPATHLEN) )
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return FALSE;
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if ( (hFile=CreateFileW(wfile,
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0,
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FILE_SHARE_DELETE|FILE_SHARE_READ|FILE_SHARE_WRITE,
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NULL,
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OPEN_EXISTING,
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FILE_FLAG_BACKUP_SEMANTICS,
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NULL)) != INVALID_HANDLE_VALUE )
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{ FILETIME wt;
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int rc;
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rc = GetFileTime(hFile, NULL, NULL, &wt);
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CloseHandle(hFile);
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if ( rc )
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{ double t;
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t = (double)wt.dwHighDateTime * (4294967296.0 * ntick nano);
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t += (double)wt.dwLowDateTime * (ntick nano);
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t -= SEC_TO_UNIX_EPOCH;
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*tp = t;
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return TRUE;
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}
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}
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set_posix_error(GetLastError());
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return FALSE;
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#else
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char tmp[MAXPATHLEN];
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statstruct buf;
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if ( statfunc(OsPath(name, tmp), &buf) < 0 )
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return FALSE;
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*tp = (double)buf.st_mtime;
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return TRUE;
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#endif
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}
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/** static int64_t SizeFile(const char *path)
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Return the size of the file path in bytes. Returns -1 if the file cannot
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be accessed.
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*/
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static int64_t
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SizeFile(const char *path)
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{ char tmp[MAXPATHLEN];
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statstruct buf;
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if ( statfunc(OsPath(path, tmp), &buf) < 0 )
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return -1;
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return buf.st_size;
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}
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/** int AccessFile(const char *path, int mode)
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TRUE if path can be accessed in the specified modes. Mode is a bitwise
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or created from one or more of the constants ACCESS_EXIST, ACCESS_READ,
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ACCESS_WRITE and ACCESS_EXECUTE.
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*/
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#ifndef F_OK
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#define F_OK 0
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#endif
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int
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AccessFile(const char *path, int mode)
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{ char tmp[MAXPATHLEN];
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#ifdef HAVE_ACCESS
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int m = 0;
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if ( mode == ACCESS_EXIST )
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m = F_OK;
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else
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{ if ( mode & ACCESS_READ ) m |= R_OK;
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if ( mode & ACCESS_WRITE ) m |= W_OK;
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#ifdef X_OK
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if ( mode & ACCESS_EXECUTE ) m |= X_OK;
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#endif
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}
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return access(OsPath(path, tmp), m) == 0 ? TRUE : FALSE;
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#else
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#error "No implementation for AccessFile()"
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#endif
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}
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int
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ExistsFile(const char *path)
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{
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#ifdef O_XOS
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return _xos_exists(path, _XOS_FILE);
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#else
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char tmp[MAXPATHLEN];
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statstruct buf;
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if ( statfunc(OsPath(path, tmp), &buf) == -1 || !S_ISREG(buf.st_mode) )
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{ DEBUG(2, perror(tmp));
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return FALSE;
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}
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return TRUE;
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#endif
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}
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int
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ExistsDirectory(const char *path)
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{
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#ifdef O_XOS
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return _xos_exists(path, _XOS_DIR);
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#else
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char tmp[MAXPATHLEN];
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char *ospath = OsPath(path, tmp);
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statstruct buf;
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if ( statfunc(ospath, &buf) < 0 )
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return FALSE;
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if ( S_ISDIR(buf.st_mode) )
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return TRUE;
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return FALSE;
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#endif /*O_XOS*/
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}
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static char *
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ReadLink(const char *f, char *buf)
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{
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#ifdef HAVE_READLINK
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int n;
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if ( (n=readlink(f, buf, MAXPATHLEN-1)) > 0 )
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{ buf[n] = EOS;
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return buf;
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}
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#endif
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return NULL;
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}
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static char *
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DeRefLink1(const char *f, char *lbuf)
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{ char buf[MAXPATHLEN];
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char *l;
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if ( (l=ReadLink(f, buf)) )
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{ if ( l[0] == '/' ) /* absolute path */
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{ strcpy(lbuf, buf);
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return lbuf;
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} else
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{ char *q;
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strcpy(lbuf, f);
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q = &lbuf[strlen(lbuf)];
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while(q>lbuf && q[-1] != '/')
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q--;
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strcpy(q, l);
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canoniseFileName(lbuf);
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return lbuf;
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}
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}
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return NULL;
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}
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/** char *DeRefLink(const char *link, char *buf)
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Dereference a symbolic link, returning its final destination. The
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returned filename is canonical (i.e., references to ./ and ../ are
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removed). Returns NULL if more than 20 links have been followed.
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*/
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char *
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DeRefLink(const char *link, char *buf)
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{ char tmp[MAXPATHLEN];
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char *f;
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int n = 20; /* avoid loop! */
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while((f=DeRefLink1(link, tmp)) && n-- > 0)
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link = f;
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if ( n > 0 )
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{ strcpy(buf, link);
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return buf;
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} else
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return NULL;
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}
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static int
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SameFile(const char *f1, const char *f2)
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{ GET_LD
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if ( truePrologFlag(PLFLAG_FILE_CASE) )
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{ if ( streq(f1, f2) )
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return TRUE;
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} else
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{ if ( strcasecmp(f1, f2) == 0 )
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return TRUE;
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}
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#ifdef __unix__ /* doesn't work on most not Unix's */
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{ statstruct buf1;
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statstruct buf2;
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char tmp[MAXPATHLEN];
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if ( statfunc(OsPath(f1, tmp), &buf1) != 0 ||
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statfunc(OsPath(f2, tmp), &buf2) != 0 )
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return FALSE;
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if ( buf1.st_ino == buf2.st_ino && buf1.st_dev == buf2.st_dev )
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return TRUE;
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}
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#endif
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#ifdef O_XOS
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return _xos_same_file(f1, f2);
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#endif /*O_XOS*/
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/* Amazing! There is no simple way to check two files for identity. */
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/* stat() and fstat() both return dummy values for inode and device. */
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/* this is fine as OS'es not supporting symbolic links don't need this */
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return FALSE;
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}
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/** int RemoveFile(const char *path)
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Remove a file from the filesystem. Returns TRUE on success and FALSE
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otherwise.
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*/
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int
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RemoveFile(const char *path)
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{ char tmp[MAXPATHLEN];
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#ifdef HAVE_REMOVE
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return remove(OsPath(path, tmp)) == 0 ? TRUE : FALSE;
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#else
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return unlink(OsPath(path, tmp)) == 0 ? TRUE : FALSE;
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#endif
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}
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static int
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RenameFile(const char *old, const char *new)
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{ char oldbuf[MAXPATHLEN];
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char newbuf[MAXPATHLEN];
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char *osold, *osnew;
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osold = OsPath(old, oldbuf);
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osnew = OsPath(new, newbuf);
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#ifdef HAVE_RENAME
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return rename(osold, osnew) == 0 ? TRUE : FALSE;
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#else
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{ int rval;
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unlink(osnew);
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if ( (rval = link(osold, osnew)) == 0
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&& (rval = unlink(osold)) != 0)
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unlink(osnew);
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if ( rval == 0 )
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return TRUE;
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return FALSE;
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}
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#endif /*HAVE_RENAME*/
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}
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static int
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MarkExecutable(const char *name)
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{
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#if (defined(HAVE_STAT) && defined(HAVE_CHMOD)) || defined(__unix__)
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statstruct buf;
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mode_t um;
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um = umask(0777);
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umask(um);
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if ( statfunc(name, &buf) == -1 )
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{ GET_LD
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term_t file = PL_new_term_ref();
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PL_put_atom_chars(file, name);
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return PL_error(NULL, 0, OsError(), ERR_FILE_OPERATION,
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ATOM_stat, ATOM_file, file);
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}
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if ( (buf.st_mode & 0111) == (~um & 0111) )
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return TRUE;
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buf.st_mode |= 0111 & ~um;
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if ( chmod(name, buf.st_mode) == -1 )
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{ GET_LD
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term_t file = PL_new_term_ref();
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PL_put_atom_chars(file, name);
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return PL_error(NULL, 0, OsError(), ERR_FILE_OPERATION,
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ATOM_chmod, ATOM_file, file);
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}
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#endif /* defined(HAVE_STAT) && defined(HAVE_CHMOD) */
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|
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return TRUE;
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}
|
|
|
|
|
|
/********************************
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* FIND FILES FROM C *
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*********************************/
|
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|
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int
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unifyTime(term_t t, time_t time)
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{ return PL_unify_time(t, time);
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}
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|
|
|
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static int
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add_option(term_t options, functor_t f, atom_t val)
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{ GET_LD
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term_t head;
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if ( (head=PL_new_term_ref()) &&
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PL_unify_list(options, head, options) &&
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PL_unify_term(head, PL_FUNCTOR, f, PL_ATOM, val) )
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{ PL_reset_term_refs(head);
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return TRUE;
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}
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|
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return FALSE;
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}
|
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|
|
#define CVT_FILENAME (CVT_ATOM|CVT_STRING|CVT_LIST)
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|
|
static int
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get_file_name(term_t n, char **namep, char *tmp, int flags)
|
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{ GET_LD
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char *name;
|
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int chflags;
|
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size_t len;
|
|
|
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if ( flags & PL_FILE_SEARCH )
|
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{ fid_t fid;
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|
|
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if ( (fid = PL_open_foreign_frame()) )
|
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{ predicate_t pred = PL_predicate("absolute_file_name", 3, "system");
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term_t av = PL_new_term_refs(3);
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term_t options = PL_copy_term_ref(av+2);
|
|
int rc = TRUE;
|
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int cflags = ((flags&PL_FILE_NOERRORS) ? PL_Q_CATCH_EXCEPTION
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: PL_Q_PASS_EXCEPTION);
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|
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PL_put_term(av+0, n);
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|
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if ( rc && flags & PL_FILE_EXIST )
|
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rc = add_option(options, FUNCTOR_access1, ATOM_exist);
|
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if ( rc && flags & PL_FILE_READ )
|
|
rc = add_option(options, FUNCTOR_access1, ATOM_read);
|
|
if ( rc && flags & PL_FILE_WRITE )
|
|
rc = add_option(options, FUNCTOR_access1, ATOM_write);
|
|
if ( rc && flags & PL_FILE_EXECUTE )
|
|
rc = add_option(options, FUNCTOR_access1, ATOM_execute);
|
|
|
|
if ( rc ) rc = PL_unify_nil(options);
|
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if ( rc ) rc = PL_call_predicate(NULL, cflags, pred, av);
|
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if ( rc ) rc = PL_get_nchars(av+1, &len, namep,
|
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CVT_ATOMIC|BUF_RING|REP_FN);
|
|
if ( rc && strlen(*namep) != len )
|
|
{ n = av+1;
|
|
goto code0;
|
|
}
|
|
|
|
PL_discard_foreign_frame(fid);
|
|
return rc;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
chflags = CVT_FILENAME;
|
|
if ( !(flags&(REP_UTF8|REP_MB)) )
|
|
chflags |= REP_FN;
|
|
if ( !(flags & PL_FILE_NOERRORS) )
|
|
chflags |= CVT_EXCEPTION;
|
|
if ( !PL_get_nchars(n, &len, &name, chflags) )
|
|
return FALSE;
|
|
if ( strlen(name) != len )
|
|
{ code0:
|
|
return PL_error(NULL, 0, "file name contains a 0-code",
|
|
ERR_DOMAIN, ATOM_file_name, n);
|
|
}
|
|
if ( len+1 >= MAXPATHLEN )
|
|
return PL_error(NULL, 0, NULL, ERR_REPRESENTATION,
|
|
ATOM_max_path_length);
|
|
|
|
if ( truePrologFlag(PLFLAG_FILEVARS) )
|
|
{ if ( !(name = expandVars(name, tmp, MAXPATHLEN)) )
|
|
return FALSE;
|
|
}
|
|
|
|
if ( !(flags & PL_FILE_NOERRORS) )
|
|
{ atom_t op = 0;
|
|
|
|
if ( (flags&(PL_FILE_READ|PL_FILE_WRITE|PL_FILE_EXECUTE|PL_FILE_EXIST)) &&
|
|
!AccessFile(name, ACCESS_EXIST) )
|
|
return PL_error(NULL, 0, NULL, ERR_EXISTENCE, ATOM_file, n);
|
|
|
|
if ( (flags&PL_FILE_READ) && !AccessFile(name, ACCESS_READ) )
|
|
op = ATOM_read;
|
|
if ( !op && (flags&PL_FILE_WRITE) && !AccessFile(name, ACCESS_WRITE) )
|
|
op = ATOM_write;
|
|
if ( !op && (flags&PL_FILE_EXECUTE) && !AccessFile(name, ACCESS_EXECUTE) )
|
|
op = ATOM_execute;
|
|
|
|
if ( op )
|
|
return PL_error(NULL, 0, NULL, ERR_PERMISSION, op, ATOM_file, n);
|
|
}
|
|
|
|
if ( flags & PL_FILE_ABSOLUTE )
|
|
{ if ( !(name = AbsoluteFile(name, tmp)) )
|
|
return FALSE;
|
|
}
|
|
|
|
*namep = buffer_string(name, BUF_RING);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
int
|
|
PL_get_file_name(term_t n, char **namep, int flags)
|
|
{ char buf[MAXPATHLEN];
|
|
char ospath[MAXPATHLEN];
|
|
char *name;
|
|
int rc;
|
|
|
|
if ( (rc=get_file_name(n, &name, buf, flags)) )
|
|
{ if ( (flags & PL_FILE_OSPATH) )
|
|
{ if ( !(name = OsPath(name, ospath)) )
|
|
return FALSE;
|
|
}
|
|
|
|
*namep = buffer_string(name, BUF_RING);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
int
|
|
PL_get_file_nameW(term_t n, wchar_t **namep, int flags)
|
|
{ char buf[MAXPATHLEN];
|
|
char ospath[MAXPATHLEN];
|
|
char *name;
|
|
int rc;
|
|
|
|
if ( (rc=get_file_name(n, &name, buf, flags|REP_UTF8)) )
|
|
{ Buffer b;
|
|
const char *s;
|
|
|
|
if ( (flags & PL_FILE_OSPATH) )
|
|
{ if ( !(name = OsPath(name, ospath)) )
|
|
return FALSE;
|
|
}
|
|
|
|
b = findBuffer(BUF_RING);
|
|
for(s = name; *s; )
|
|
{ int chr;
|
|
|
|
s = utf8_get_char(s, &chr);
|
|
addBuffer(b, (wchar_t)chr, wchar_t);
|
|
}
|
|
addBuffer(b, (wchar_t)0, wchar_t);
|
|
|
|
*namep = baseBuffer(b, wchar_t);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
/*******************************
|
|
* QUERY FILES *
|
|
*******************************/
|
|
|
|
static
|
|
PRED_IMPL("time_file", 2, time_file, 0)
|
|
{ char *fn;
|
|
|
|
if ( PL_get_file_name(A1, &fn, 0) )
|
|
{ double time;
|
|
|
|
if ( LastModifiedFile(fn, &time) )
|
|
return PL_unify_float(A2, time);
|
|
|
|
return PL_error(NULL, 0, NULL, ERR_FILE_OPERATION,
|
|
ATOM_time, ATOM_file, A1);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("size_file", 2, size_file, 0)
|
|
{ PRED_LD
|
|
char *n;
|
|
|
|
if ( PL_get_file_name(A1, &n, 0) )
|
|
{ int64_t size;
|
|
|
|
if ( (size = SizeFile(n)) < 0 )
|
|
return PL_error("size_file", 2, OsError(), ERR_FILE_OPERATION,
|
|
ATOM_size, ATOM_file, A1);
|
|
|
|
return PL_unify_int64(A2, size);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("access_file", 2, access_file, 0)
|
|
{ PRED_LD
|
|
char *n;
|
|
int md;
|
|
atom_t m;
|
|
|
|
term_t name = A1;
|
|
term_t mode = A2;
|
|
|
|
if ( !PL_get_atom(mode, &m) )
|
|
return PL_error("access_file", 2, NULL, ERR_TYPE, ATOM_atom, mode);
|
|
if ( !PL_get_file_name(name, &n, 0) )
|
|
return FALSE;
|
|
|
|
if ( m == ATOM_none )
|
|
return TRUE;
|
|
|
|
if ( m == ATOM_write || m == ATOM_append )
|
|
md = ACCESS_WRITE;
|
|
else if ( m == ATOM_read )
|
|
md = ACCESS_READ;
|
|
else if ( m == ATOM_execute )
|
|
md = ACCESS_EXECUTE;
|
|
else if ( m == ATOM_exist )
|
|
md = ACCESS_EXIST;
|
|
else
|
|
return PL_error("access_file", 2, NULL, ERR_DOMAIN, ATOM_io_mode, mode);
|
|
|
|
if ( AccessFile(n, md) )
|
|
return TRUE;
|
|
|
|
if ( md == ACCESS_WRITE && !AccessFile(n, ACCESS_EXIST) )
|
|
{ char tmp[MAXPATHLEN];
|
|
char *dir = DirName(n, tmp);
|
|
|
|
if ( dir[0] )
|
|
{ if ( !ExistsDirectory(dir) )
|
|
return FALSE;
|
|
}
|
|
if ( AccessFile(dir[0] ? dir : ".", md) )
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("read_link", 3, read_link, 0)
|
|
{ char *n, *l, *t;
|
|
char buf[MAXPATHLEN];
|
|
|
|
term_t file = A1;
|
|
term_t link = A2;
|
|
term_t to = A3;
|
|
|
|
if ( !PL_get_file_name(file, &n, 0) )
|
|
return FALSE;
|
|
|
|
if ( (l = ReadLink(n, buf)) &&
|
|
PL_unify_atom_chars(link, l) &&
|
|
(t = DeRefLink(n, buf)) &&
|
|
PL_unify_atom_chars(to, t) )
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("exists_file", 1, exists_file, 0)
|
|
{ char *n;
|
|
|
|
if ( !PL_get_file_name(A1, &n, 0) )
|
|
return FALSE;
|
|
|
|
return ExistsFile(n);
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("exists_directory", 1, exists_directory, 0)
|
|
{ char *n;
|
|
|
|
if ( !PL_get_file_name(A1, &n, 0) )
|
|
return FALSE;
|
|
|
|
return ExistsDirectory(n);
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("is_absolute_file_name", 1, is_absolute_file_name, 0)
|
|
{ char *n;
|
|
|
|
if ( PL_get_file_name(A1, &n, 0) &&
|
|
IsAbsolutePath(n) )
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("same_file", 2, same_file, 0)
|
|
{ char *n1, *n2;
|
|
|
|
if ( PL_get_file_name(A1, &n1, 0) &&
|
|
PL_get_file_name(A2, &n2, 0) )
|
|
return SameFile(n1, n2);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("file_base_name", 2, file_base_name, 0)
|
|
{ char *n;
|
|
|
|
if ( !PL_get_chars(A1, &n, CVT_ALL|REP_FN|CVT_EXCEPTION) )
|
|
return FALSE;
|
|
|
|
return PL_unify_chars(A2, PL_ATOM|REP_FN, -1, BaseName(n));
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("file_directory_name", 2, file_directory_name, 0)
|
|
{ char *n;
|
|
char tmp[MAXPATHLEN];
|
|
|
|
if ( !PL_get_chars(A1, &n, CVT_ALL|REP_FN|CVT_EXCEPTION) )
|
|
return FALSE;
|
|
|
|
return PL_unify_chars(A2, PL_ATOM|REP_FN, -1, DirName(n, tmp));
|
|
}
|
|
|
|
|
|
/*******************************
|
|
* TEMPORARY FILES *
|
|
*******************************/
|
|
|
|
static
|
|
PRED_IMPL("tmp_file", 2, tmp_file, 0)
|
|
{ PRED_LD
|
|
char *n;
|
|
|
|
term_t base = A1;
|
|
term_t name = A2;
|
|
|
|
if ( !PL_get_chars(base, &n, CVT_ALL) )
|
|
return PL_error("tmp_file", 2, NULL, ERR_TYPE, ATOM_atom, base);
|
|
|
|
return PL_unify_atom(name, TemporaryFile(n, NULL));
|
|
}
|
|
|
|
/** tmp_file_stream(+Mode, -File, -Stream)
|
|
*/
|
|
|
|
static
|
|
PRED_IMPL("tmp_file_stream", 3, tmp_file_stream, 0)
|
|
{ PRED_LD
|
|
atom_t fn;
|
|
int fd;
|
|
IOENC enc;
|
|
atom_t encoding;
|
|
const char *mode;
|
|
|
|
if ( !PL_get_atom_ex(A1, &encoding) )
|
|
return FALSE;
|
|
if ( (enc = atom_to_encoding(encoding)) == ENC_UNKNOWN )
|
|
{ if ( encoding == ATOM_binary )
|
|
{ enc = ENC_OCTET;
|
|
mode = "wb";
|
|
} else
|
|
{ return PL_error(NULL, 0, NULL, ERR_DOMAIN, ATOM_encoding, A1);
|
|
}
|
|
} else
|
|
{ mode = "w";
|
|
}
|
|
|
|
if ( (fn=TemporaryFile("", &fd)) )
|
|
{ IOSTREAM *s;
|
|
|
|
if ( !PL_unify_atom(A2, fn) )
|
|
{ close(fd);
|
|
return PL_error(NULL, 0, NULL, ERR_UNINSTANTIATION, 2, A2);
|
|
}
|
|
|
|
s = Sfdopen(fd, mode);
|
|
s->encoding = enc;
|
|
return PL_unify_stream(A3, s);
|
|
} else
|
|
{ return PL_error(NULL, 0, NULL, ERR_RESOURCE, ATOM_temporary_files);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/*******************************
|
|
* CHANGE FILESYSTEM *
|
|
*******************************/
|
|
|
|
|
|
static
|
|
PRED_IMPL("swi_delete_file", 1, delete_file, 0)
|
|
{ PRED_LD
|
|
char *n;
|
|
atom_t aname;
|
|
|
|
if ( PL_get_atom(A1, &aname) &&
|
|
DeleteTemporaryFile(aname) )
|
|
return TRUE;
|
|
|
|
if ( !PL_get_file_name(A1, &n, 0) )
|
|
return FALSE;
|
|
|
|
if ( RemoveFile(n) )
|
|
return TRUE;
|
|
|
|
return PL_error(NULL, 0, MSG_ERRNO, ERR_FILE_OPERATION,
|
|
ATOM_delete, ATOM_file, A1);
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("delete_directory", 1, delete_directory, 0)
|
|
{ char *n;
|
|
|
|
if ( !PL_get_file_name(A1, &n, 0) )
|
|
return FALSE;
|
|
|
|
if ( rmdir(n) == 0 )
|
|
return TRUE;
|
|
else
|
|
return PL_error(NULL, 0, MSG_ERRNO, ERR_FILE_OPERATION,
|
|
ATOM_delete, ATOM_directory, A1);
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("make_directory", 1, make_directory, 0)
|
|
{ char *n;
|
|
|
|
if ( !PL_get_file_name(A1, &n, 0) )
|
|
return FALSE;
|
|
|
|
#if __MINGW32__
|
|
#define mkdir(A, B) mkdir(A)
|
|
#endif
|
|
if ( mkdir(n, 0777) == 0 )
|
|
return TRUE;
|
|
else
|
|
return PL_error(NULL, 0, MSG_ERRNO, ERR_FILE_OPERATION,
|
|
ATOM_create, ATOM_directory, A1);
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("rename_file", 2, rename_file, 0)
|
|
{ PRED_LD
|
|
char *o, *n;
|
|
|
|
term_t old = A1;
|
|
term_t new = A2;
|
|
|
|
if ( PL_get_file_name(old, &o, 0) &&
|
|
PL_get_file_name(new, &n, 0) )
|
|
{ if ( SameFile(o, n) )
|
|
{ if ( truePrologFlag(PLFLAG_FILEERRORS) )
|
|
return PL_error("rename_file", 2, "same file", ERR_PERMISSION,
|
|
ATOM_rename, ATOM_file, old);
|
|
return FALSE;
|
|
}
|
|
|
|
if ( RenameFile(o, n) )
|
|
return TRUE;
|
|
|
|
if ( truePrologFlag(PLFLAG_FILEERRORS) )
|
|
return PL_error("rename_file", 2, OsError(), ERR_FILE_OPERATION,
|
|
ATOM_rename, ATOM_file, old);
|
|
return FALSE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("$absolute_file_name", 2, absolute_file_name, 0)
|
|
{ char *n;
|
|
char tmp[MAXPATHLEN];
|
|
|
|
term_t name = A1;
|
|
term_t expanded = A2;
|
|
|
|
if ( PL_get_file_name(name, &n, 0) &&
|
|
(n = AbsoluteFile(n, tmp)) )
|
|
return PL_unify_chars(expanded, PL_ATOM|REP_FN, -1, n);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("working_directory", 2, working_directory, 0)
|
|
{ PRED_LD
|
|
char buf[MAXPATHLEN];
|
|
const char *wd;
|
|
|
|
term_t old = A1;
|
|
term_t new = A2;
|
|
|
|
if ( !(wd = PL_cwd(buf, sizeof(buf))) )
|
|
return FALSE;
|
|
|
|
if ( PL_unify_chars(old, PL_ATOM|REP_FN, -1, wd) )
|
|
{ if ( PL_compare(old, new) != 0 )
|
|
{ char *n;
|
|
|
|
if ( PL_get_file_name(new, &n, 0) )
|
|
{ if ( ChDir(n) )
|
|
return TRUE;
|
|
|
|
if ( truePrologFlag(PLFLAG_FILEERRORS) )
|
|
return PL_error(NULL, 0, NULL, ERR_FILE_OPERATION,
|
|
ATOM_chdir, ATOM_directory, new);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static int
|
|
has_extension(const char *name, const char *ext)
|
|
{ GET_LD
|
|
const char *s = name + strlen(name);
|
|
|
|
if ( ext[0] == EOS )
|
|
return TRUE;
|
|
|
|
while(*s != '.' && *s != '/' && s > name)
|
|
s--;
|
|
if ( *s == '.' && s > name && s[-1] != '/' )
|
|
{ if ( ext[0] == '.' )
|
|
ext++;
|
|
if ( truePrologFlag(PLFLAG_FILE_CASE) )
|
|
return strcmp(&s[1], ext) == 0;
|
|
else
|
|
return strcasecmp(&s[1], ext) == 0;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static int
|
|
name_too_long(void)
|
|
{ return PL_error(NULL, 0, NULL, ERR_REPRESENTATION, ATOM_max_path_length);
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("file_name_extension", 3, file_name_extension, 0)
|
|
{ PRED_LD
|
|
char *b = NULL, *e = NULL, *f;
|
|
char buf[MAXPATHLEN];
|
|
|
|
term_t base = A1;
|
|
term_t ext = A2;
|
|
term_t full = A3;
|
|
|
|
if ( !PL_is_variable(full) )
|
|
{ if ( PL_get_chars(full, &f, CVT_ALL|CVT_EXCEPTION|REP_FN) )
|
|
{ char *s = f + strlen(f); /* ?base, ?ext, +full */
|
|
|
|
while(*s != '.' && *s != '/' && s > f)
|
|
s--;
|
|
if ( *s == '.' )
|
|
{ if ( PL_get_chars(ext, &e, CVT_ALL|REP_FN) )
|
|
{ if ( e[0] == '.' )
|
|
e++;
|
|
if ( truePrologFlag(PLFLAG_FILE_CASE) )
|
|
{ TRY(strcmp(&s[1], e) == 0);
|
|
} else
|
|
{ TRY(strcasecmp(&s[1], e) == 0);
|
|
}
|
|
} else
|
|
{ TRY(PL_unify_chars(ext, PL_ATOM|REP_FN, -1, &s[1]));
|
|
}
|
|
|
|
return PL_unify_chars(base, PL_ATOM|REP_FN, s-f, f);
|
|
}
|
|
if ( PL_unify_atom_chars(ext, "") &&
|
|
PL_unify(full, base) )
|
|
PL_succeed;
|
|
}
|
|
PL_fail;
|
|
}
|
|
|
|
if ( PL_get_chars(base, &b, CVT_ALL|BUF_RING|REP_FN|CVT_EXCEPTION) &&
|
|
PL_get_chars(ext, &e, CVT_ALL|REP_FN|CVT_EXCEPTION) )
|
|
{ char *s;
|
|
|
|
if ( e[0] == '.' ) /* +Base, +Extension, -full */
|
|
e++;
|
|
if ( has_extension(b, e) )
|
|
return PL_unify(base, full);
|
|
if ( strlen(b) + 1 + strlen(e) + 1 > MAXPATHLEN )
|
|
return name_too_long();
|
|
strcpy(buf, b);
|
|
s = buf + strlen(buf);
|
|
*s++ = '.';
|
|
strcpy(s, e);
|
|
|
|
return PL_unify_chars(full, PL_ATOM|REP_FN, -1, buf);
|
|
} else
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("prolog_to_os_filename", 2, prolog_to_os_filename, 0)
|
|
{ PRED_LD
|
|
|
|
term_t pl = A1;
|
|
term_t os = A2;
|
|
|
|
#ifdef O_XOS
|
|
wchar_t *wn;
|
|
|
|
if ( !PL_is_variable(pl) )
|
|
{ char *n;
|
|
wchar_t buf[MAXPATHLEN];
|
|
|
|
if ( PL_get_chars(pl, &n, CVT_ALL|REP_UTF8|CVT_EXCEPTION) )
|
|
{ if ( !_xos_os_filenameW(n, buf, MAXPATHLEN) )
|
|
return name_too_long();
|
|
|
|
return PL_unify_wchars(os, PL_ATOM, -1, buf);
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
if ( PL_get_wchars(os, NULL, &wn, CVT_ALL) )
|
|
{ wchar_t lbuf[MAXPATHLEN];
|
|
char buf[MAXPATHLEN];
|
|
|
|
_xos_long_file_nameW(wn, lbuf, MAXPATHLEN);
|
|
_xos_canonical_filenameW(lbuf, buf, MAXPATHLEN, 0);
|
|
|
|
return PL_unify_chars(pl, PL_ATOM|REP_UTF8, -1, buf);
|
|
}
|
|
|
|
return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_atom, pl);
|
|
#else /*O_XOS*/
|
|
return PL_unify(pl, os);
|
|
#endif /*O_XOS*/
|
|
}
|
|
|
|
|
|
static
|
|
PRED_IMPL("mark_executable", 1, mark_executable, 0)
|
|
{ char *name;
|
|
|
|
if ( !PL_get_file_name(A1, &name, 0) )
|
|
return PL_error(NULL, 0, NULL, ERR_DOMAIN, ATOM_source_sink, A1);
|
|
|
|
return MarkExecutable(name);
|
|
}
|
|
|
|
|
|
/*******************************
|
|
* INIT *
|
|
*******************************/
|
|
|
|
void
|
|
initFiles(void)
|
|
{
|
|
}
|
|
|
|
|
|
/*******************************
|
|
* PUBLISH PREDICATES *
|
|
*******************************/
|
|
|
|
BeginPredDefs(files)
|
|
PRED_DEF("working_directory", 2, working_directory, 0)
|
|
PRED_DEF("access_file", 2, access_file, 0)
|
|
PRED_DEF("time_file", 2, time_file, 0)
|
|
PRED_DEF("size_file", 2, size_file, 0)
|
|
PRED_DEF("read_link", 3, read_link, 0)
|
|
PRED_DEF("exists_file", 1, exists_file, 0)
|
|
PRED_DEF("exists_directory", 1, exists_directory, 0)
|
|
PRED_DEF("tmp_file", 2, tmp_file, 0)
|
|
PRED_DEF("tmp_file_stream", 3, tmp_file_stream, 0)
|
|
PRED_DEF("swi_delete_file", 1, delete_file, 0)
|
|
PRED_DEF("delete_directory", 1, delete_directory, 0)
|
|
PRED_DEF("make_directory", 1, make_directory, 0)
|
|
PRED_DEF("same_file", 2, same_file, 0)
|
|
PRED_DEF("rename_file", 2, rename_file, 0)
|
|
PRED_DEF("is_absolute_file_name", 1, is_absolute_file_name, 0)
|
|
PRED_DEF("file_base_name", 2, file_base_name, 0)
|
|
PRED_DEF("file_directory_name", 2, file_directory_name, 0)
|
|
PRED_DEF("file_name_extension", 3, file_name_extension, 0)
|
|
PRED_DEF("prolog_to_os_filename", 2, prolog_to_os_filename, 0)
|
|
PRED_DEF("$mark_executable", 1, mark_executable, 0)
|
|
PRED_DEF("$absolute_file_name", 2, absolute_file_name, 0)
|
|
EndPredDefs
|