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os_files.c
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os_files.c
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/* File: "os_files.c", Time-stamp: <2009-03-14 11:14:20 feeley> */
/* Copyright (c) 1994-2009 by Marc Feeley, All Rights Reserved. */
/*
* This module implements the operating system specific routines
* related to the file system.
*/
#define ___INCLUDED_FROM_OS_FILES
#define ___VERSION 405003
#include "gambit.h"
#include "os_base.h"
#include "os_shell.h"
#include "os_files.h"
#include "setup.h"
/*---------------------------------------------------------------------------*/
___files_module ___files_mod =
{
0
#ifdef ___FILES_MODULE_INIT
___FILES_MODULE_INIT
#endif
};
/*---------------------------------------------------------------------------*/
#ifdef USE_CLASSIC_MACOS
/* String conversion utilities. */
___HIDDEN Boolean c2pascal
___P((char *cstr,
StringPtr pstr,
int max_length),
(cstr,
pstr,
max_length)
char *cstr;
StringPtr pstr;
int max_length;)
{
StringPtr p1 = pstr+1;
char *p2 = cstr;
while (max_length > 0 && *p2 != '\0')
{
*p1++ = *p2++;
max_length--;
}
if (*p2 != '\0')
return 0;
else
{
pstr[0] = p2-cstr;
return 1;
}
}
___HIDDEN Boolean pascal2c
___P((StringPtr pstr,
char *cstr,
int max_length),
(pstr,
cstr,
max_length)
StringPtr pstr;
char *cstr;
int max_length;)
{
char *p1 = cstr;
StringPtr p2 = pstr+1;
int len = pstr[0];
if (len > max_length)
return 0;
else
{
while (len-- > 0)
*p1++ = *p2++;
*p1++ = '\0';
return 1;
}
}
#define DIR_SEPARATOR1 ':'
#define PARENT_HOP ":"
#define DIR_SEPARATOR(c)((c) == DIR_SEPARATOR1)
#define SEPARATOR(c)DIR_SEPARATOR(c)
___HIDDEN OSErr make_ResolvedFSSpec
___P((short vol,
long dir,
ConstStr255Param path,
FSSpec *spec),
(vol,
dir,
path,
spec)
short vol;
long dir;
ConstStr255Param path;
FSSpec *spec;)
{
OSErr err;
Str255 name;
StringPtr start = ___CAST(StringPtr,path+1);
StringPtr end = start + path[0];
StringPtr p1 = start;
StringPtr p2 = name+1;
CInfoPBRec pb;
Boolean is_folder;
Boolean is_aliased;
if (!has_AliasMgr)
return unimpErr;
spec->vRefNum = vol;
spec->parID = dir;
do
{
p2 = name+1;
while (p1 < end && DIR_SEPARATOR(*p1)) /* copy leading ':'s */
*p2++ = *p1++;
while (p1 < end && !DIR_SEPARATOR(*p1)) /* copy name that follows */
*p2++ = *p1++;
if (p1 < end && DIR_SEPARATOR(*p1)) /* end with a ':' if folder */
*p2++ = DIR_SEPARATOR1;
name[0] = p2 - (name+1);
err = FSMakeFSSpec (spec->vRefNum, spec->parID, name, spec);
if (err == fnfErr && p1 == end)
return noErr;
if (err != noErr)
return err;
if ((err = ResolveAliasFile (spec, 1, &is_folder, &is_aliased)) != noErr)
return err;
if (is_folder)
{
pb.dirInfo.ioNamePtr = spec->name;
pb.dirInfo.ioVRefNum = spec->vRefNum;
pb.dirInfo.ioDrDirID = spec->parID;
pb.dirInfo.ioFDirIndex = 0;
if ((err = PBGetCatInfoSync (&pb)) != noErr)
return err;
spec->parID = pb.hFileInfo.ioDirID;
spec->name[0] = 0;
}
else if (p1 < end)
return dirNFErr;
} while (p1 < end);
return noErr;
}
___HIDDEN OSErr ResolvedFSSpec_to_fullpath
___P((FSSpec *spec,
StringPtr fullpath),
(spec,
fullpath)
FSSpec *spec;
StringPtr fullpath;)
{
OSErr err;
int i;
Str255 result;
StringPtr p = result + sizeof(result);
CInfoPBRec pb;
Str31 name;
for (i = spec->name[0]; i > 0; i--)
*--p = spec->name[i];
pb.dirInfo.ioNamePtr = name;
pb.dirInfo.ioVRefNum = spec->vRefNum;
pb.dirInfo.ioDrParID = spec->parID;
pb.dirInfo.ioFDirIndex = -1;
do
{
pb.dirInfo.ioDrDirID = pb.dirInfo.ioDrParID;
if ((err = PBGetCatInfoSync (&pb)) != noErr)
return err;
if (p-name[0]-1 < result)
return bdNamErr; /* file name is too long */
*--p = DIR_SEPARATOR1;
for (i = name[0]; i > 0; i--)
*--p = name[i];
} while (pb.dirInfo.ioDrDirID != fsRtDirID);
i = result + sizeof(result) - p;
*fullpath++ = i;
while (i > 0)
{
*fullpath++ = *p++;
i--;
}
return noErr;
}
___HIDDEN ___SCMOBJ path_expand_to_absolute
___P((char *path,
char *directory,/******************* currently ignored*/
char *new_path,
long max_length),
(path,
directory,
new_path,
max_length)
char *path;
char *directory;
char *new_path;
long max_length;)
{
___BOOL result = 0;
FSSpec spec;
short vol;
long dir;
char tmp[___PATH_MAX_LENGTH+1];
Str255 ppath;
if (path[0] == '~')
{
if (path[1] == '~')
{
/* "~~" or "~~:xxx..." */
int i = 0;
int j = 0;
int sep = 0;
char *tilde_dir;
if (!has_FindFolder)
goto ret;
if (path[2]!='\0' && !DIR_SEPARATOR(path[2]))
goto ret;
tilde_dir = ___setup_params.gambcdir;
if (tilde_dir == 0)
#ifdef ___GAMBCDIR
tilde_dir = ___GAMBCDIR;
#else
tilde_dir = ":Gambit-C";
#endif
i += 2;
while (*tilde_dir != '\0')
if (j < ___PATH_MAX_LENGTH)
{
tmp[j] = *tilde_dir++;
j++;
}
else
goto ret;
while (path[i] != '\0')
if (j < ___PATH_MAX_LENGTH)
{
if (DIR_SEPARATOR(path[i]))
sep = 1;
tmp[j++] = path[i++];
}
else
goto ret;
if (!sep)
if (j < ___PATH_MAX_LENGTH)
tmp[j++] = DIR_SEPARATOR1;
else
goto ret;
tmp[j] = '\0';
path = tmp;
if (FindFolder (kOnSystemDisk,
kPreferencesFolderType,
0,
&vol,
&dir)
!= noErr)
goto ret;
}
else if (path[1]!='\0' && !DIR_SEPARATOR(path[1]))
{
/* "~user" or "~user:xxx..." */
goto ret; /* no equivalent on Macintosh */
}
else
{
/* "~" or "~:xxx..." */
path++;
vol = 0; /* use default volume and directory
(folder containing application) */
dir = 0;
}
}
else
{
vol = 0; /* use default volume and directory
(folder containing application) */
dir = 0;
}
if (!c2pascal (path, ppath, 255) ||
make_ResolvedFSSpec (vol, dir, ppath, &spec) != noErr ||
ResolvedFSSpec_to_fullpath (&spec, ppath) != noErr ||
!pascal2c (ppath, new_path, max_length))
goto ret;
result = 1;
ret:
return result;
}
___HIDDEN OSErr copy_file_sectors
___P((short src_refnum,
short dst_refnum),
(src_refnum,
dst_refnum)
short src_refnum;
short dst_refnum;)
{
OSErr err1, err2;
char buf[2048];
long count1, count2;
do
{
count1 = sizeof (buf);
err1 = FSRead (src_refnum, &count1, buf);
if (err1 != noErr && err1 != eofErr)
return err1;
count2 = count1;
err2 = FSWrite (dst_refnum, &count2, buf);
if (err2 != noErr || count1 != count2)
return err2;
} while (err1 != eofErr);
return noErr;
}
___HIDDEN OSErr copy_file
___P((FSSpec src_spec,
FSSpec dst_spec),
(src_spec,
dst_spec)
FSSpec src_spec;
FSSpec dst_spec;)
{
OSErr err, err2;
short src_refnum, dst_refnum;
FInfo src_info;
if (((err = FSpDelete (&dst_spec)) == noErr || err == fnfErr) &&
(err = FSpGetFInfo (&src_spec, &src_info)) == noErr &&
(err = FSpCreate (&dst_spec, 0x3f3f3f3f, 0x3f3f3f3f, 0)) == noErr)
{
src_info.fdFlags = src_info.fdFlags & ~kHasBeenInited;
if ((err = FSpSetFInfo (&dst_spec, &src_info) == noErr) &&
(err = FSpOpenRF (&src_spec, fsRdPerm, &src_refnum) == noErr))
{
if ((err = FSpOpenRF (&dst_spec, fsWrPerm, &dst_refnum)) == noErr)
{
err = copy_file_sectors (src_refnum, dst_refnum);
err2 = FSClose (dst_refnum);
if (err == noErr)
err = err2;
}
err2 = FSClose (src_refnum);
if (err == noErr)
err = err2;
if (err == noErr &&
(err = FSpOpenDF (&src_spec, fsRdPerm, &src_refnum) == noErr))
{
if ((err = FSpOpenDF (&dst_spec, fsWrPerm, &dst_refnum)) == noErr)
{
err = copy_file_sectors (src_refnum, dst_refnum);
err2 = FSClose (dst_refnum);
if (err == noErr)
err = err2;
}
err2 = FSClose (src_refnum);
if (err == noErr)
err = err2;
}
}
if (err != noErr)
FSpDelete (&dst_spec);
}
return err;
}
#endif
/*---------------------------------------------------------------------------*/
/* Filesystem path expansion. */
___SCMOBJ ___os_path_homedir ___PVOID
{
___SCMOBJ e;
___SCMOBJ result;
___UCS_2STRING cstr1;
static ___UCS_2 cvar1[] =
{ 'H', 'O', 'M', 'E', '\0' };
if ((e = ___getenv_UCS_2 (cvar1, &cstr1)) != ___FIX(___NO_ERR))
result = e;
else
{
if (cstr1 != 0)
{
if ((e = ___UCS_2STRING_to_SCMOBJ
(cstr1,
&result,
___RETURN_POS))
!= ___FIX(___NO_ERR))
result = e;
else
___release_scmobj (result);
___free_mem (cstr1);
}
else
{
#ifdef USE_WIN32
___CHAR_TYPE(___PATH_CE_SELECT) homedir[___PATH_MAX_LENGTH+1];
int len = ___PATH_MAX_LENGTH+1;
int n;
static ___CHAR_TYPE(___GETENV_CE_SELECT) cvar2[] =
{ 'H', 'O', 'M', 'E', 'D', 'R', 'I', 'V', 'E', '\0' };
static ___CHAR_TYPE(___GETENV_CE_SELECT) cvar3[] =
{ 'H', 'O', 'M', 'E', 'P', 'A', 'T', 'H', '\0' };
n = GetEnvironmentVariable (cvar2, homedir, len);
if (n > 0 && n < len)
{
len -= n;
n = GetEnvironmentVariable (cvar3, homedir+n, len);
if (n > 0 && n < len)
{
if ((e = ___NONNULLSTRING_to_SCMOBJ
(homedir,
&result,
___RETURN_POS,
___CE(___PATH_CE_SELECT)))
!= ___FIX(___NO_ERR))
result = e;
else
___release_scmobj (result);
}
else
result = ___FAL;
}
else
result = ___FAL;
#else
result = ___FAL;
#endif
}
}
return result;
}
___SCMOBJ ___os_path_gambcdir ___PVOID
{
___SCMOBJ e;
___SCMOBJ result;
#ifdef USE_WIN32
#ifndef ___GAMBCDIR
#ifdef USE_GetModuleFileName
if (___setup_params.gambcdir == 0)
{
___CHAR_TYPE(___PATH_CE_SELECT) temp[___PATH_MAX_LENGTH+1];
DWORD n;
n = GetModuleFileName (NULL, temp, ___PATH_MAX_LENGTH+1);
if (n > 0)
{
int cch;
___UCS_2STRING gambcdir = 0;
/* remove filename */
*(_tcsrchr (temp, '\\')) = 0;
/* remove bin subdirectory, if present */
cch = _tcslen (temp);
if (cch > 7) /* e.g. C:\x\bin */
{
if (0 == _tcsicmp (temp+cch-4, _T("\\bin")))
{
cch -= 4;
*(temp+cch) = '\0';
}
}
gambcdir = ___CAST(___UCS_2STRING,
___alloc_mem ((cch+1) * sizeof (___UCS_2)));
if (gambcdir == 0)
{
e = ___FIX(___HEAP_OVERFLOW_ERR);
return e;
}
else
{
#ifdef _UNICODE
_tcscpy (gambcdir, temp);
#else
mbstowcs (gambcdir, temp, cch);
gambcdir[cch] = '\0';
#endif
___setup_params.gambcdir = gambcdir;
}
}
}
#endif
#endif
#endif
if (___setup_params.gambcdir != 0)
{
if ((e = ___NONNULLUCS_2STRING_to_SCMOBJ
(___setup_params.gambcdir,
&result,
___RETURN_POS))
!= ___FIX(___NO_ERR))
result = e;
else
___release_scmobj (result);
}
else
{
#ifndef ___GAMBCDIR
#define STRINGIFY1(x) #x
#define STRINGIFY2(x) STRINGIFY1(x)
#ifdef USE_POSIX
#define ___GAMBCDIR "/usr/local/Gambit-C/" STRINGIFY2(___VERSION)
#endif
#ifdef USE_WIN32
/* Will only be used if GetModuleFileName path fails */
#define ___GAMBCDIR "c:\\Gambit-C\\" STRINGIFY2(___VERSION)
#endif
#ifdef USE_CLASSIC_MACOS
#define ___GAMBCDIR ":Gambit-C:" STRINGIFY2(___VERSION)
#endif
#endif
if ((e = ___NONNULLCHARSTRING_to_SCMOBJ
(___GAMBCDIR,
&result,
___RETURN_POS))
!= ___FIX(___NO_ERR))
result = e;
else
___release_scmobj (result);
}
return result;
}
#ifndef ___GAMBCDIR_MAP_CE_SELECT
#define ___GAMBCDIR_MAP_CE_SELECT(latin1,utf8,ucs2,ucs4,wchar,native) ucs2
#endif
#ifndef ___CONFIG_GAMBCDIR_MAP_CE_SELECT
#define ___CONFIG_GAMBCDIR_MAP_CE_SELECT(latin1,utf8,ucs2,ucs4,wchar,native) native
#endif
/*
* TODO: the current implementation of the lookup duplicates the
* lookup logic because the configuration map and the map from the
* runtime options are not represented with the same string type. The
* proper approach would be to represent OS environment variables
* using UTF-8 strings, but this would require substantial changes.
*/
___HIDDEN ___STRING_TYPE(___GAMBCDIR_MAP_CE_SELECT) gambcdir_map_lookup
___P((___STRING_TYPE(___GAMBCDIR_MAP_CE_SELECT) d),
(d)
___STRING_TYPE(___GAMBCDIR_MAP_CE_SELECT) d;)
{
___STRING_TYPE(___GAMBCDIR_MAP_CE_SELECT) dir;
___STRING_TYPE(___GAMBCDIR_MAP_CE_SELECT) *p = ___setup_params.gambcdir_map;
if (p == 0)
return 0;
while ((dir = *p++) != 0)
{
int i = 0;
for (;;)
{
___UCS_2 c = d[i];
if (c == '\0')
{
if (dir[i] == '=')
return dir+i+1;
else
break;
}
else if ((dir[i] == '=') || (dir[i] != c))
{
break;
}
i++;
}
}
return 0;
}
___HIDDEN ___STRING_TYPE(___CONFIG_GAMBCDIR_MAP_CE_SELECT) config_gambcdir_map[] =
{
#ifdef ___GAMBCDIR_BIN
"bin=" ___GAMBCDIR_BIN,
#endif
#ifdef ___GAMBCDIR_DOC
"doc=" ___GAMBCDIR_DOC,
#endif
#ifdef ___GAMBCDIR_INCLUDE
"include=" ___GAMBCDIR_INCLUDE,
#endif
#ifdef ___GAMBCDIR_INFO
"info=" ___GAMBCDIR_INFO,
#endif
#ifdef ___GAMBCDIR_LIB
"lib=" ___GAMBCDIR_LIB,
#endif
#ifdef ___GAMBCDIR_SHARE
"share=" ___GAMBCDIR_SHARE,
#endif
0
};
___HIDDEN ___STRING_TYPE(___CONFIG_GAMBCDIR_MAP_CE_SELECT) config_gambcdir_map_lookup
___P((___STRING_TYPE(___GAMBCDIR_MAP_CE_SELECT) d),
(d)
___STRING_TYPE(___GAMBCDIR_MAP_CE_SELECT) d;)
{
___STRING_TYPE(___CONFIG_GAMBCDIR_MAP_CE_SELECT) dir;
___STRING_TYPE(___CONFIG_GAMBCDIR_MAP_CE_SELECT) *p = config_gambcdir_map;
while ((dir = *p++) != 0)
{
int i = 0;
for (;;)
{
___UCS_2 c = d[i];
if (c == '\0')
{
if (dir[i] == '=')
return dir+i+1;
else
break;
}
else if ((dir[i] == '=') || (dir[i] != c))
{
break;
}
i++;
}
}
return 0;
}
___SCMOBJ ___os_path_gambcdir_map_lookup
___P((___SCMOBJ dir),
(dir)
___SCMOBJ dir;)
{
___SCMOBJ e;
___SCMOBJ result;
void *cdir;
if ((e = ___SCMOBJ_to_STRING
(dir,
&cdir,
1,
___CE(___GAMBCDIR_MAP_CE_SELECT),
0))
!= ___FIX(___NO_ERR))
result = e;
else
{
___STRING_TYPE(___GAMBCDIR_MAP_CE_SELECT) d =
___CAST(___STRING_TYPE(___GAMBCDIR_MAP_CE_SELECT),cdir);
___STRING_TYPE(___GAMBCDIR_MAP_CE_SELECT) dir1;
___STRING_TYPE(___CONFIG_GAMBCDIR_MAP_CE_SELECT) dir2;
if ((dir1 = gambcdir_map_lookup (d)) != 0)
{
if ((e = ___STRING_to_SCMOBJ
(dir1,
&result,
___RETURN_POS,
___CE(___GAMBCDIR_MAP_CE_SELECT)))
!= ___FIX(___NO_ERR))
result = e;
else
___release_scmobj (result);
}
else if ((dir2 = config_gambcdir_map_lookup (d)) != 0)
{
if ((e = ___STRING_to_SCMOBJ
(dir2,
&result,
___RETURN_POS,
___CE(___CONFIG_GAMBCDIR_MAP_CE_SELECT)))
!= ___FIX(___NO_ERR))
result = e;
else
___release_scmobj (result);
}
else
result = ___FAL;
___release_string (cdir);
}
return result;
}
___SCMOBJ ___os_path_normalize_directory
___P((___SCMOBJ path),
(path)
___SCMOBJ path;)
{
___SCMOBJ e;
___SCMOBJ result;
void *cpath;
if ((e = ___SCMOBJ_to_STRING
(path,
&cpath,
1,
___CE(___PATH_CE_SELECT),
0))
!= ___FIX(___NO_ERR))
result = e;
else
{
___STRING_TYPE(___PATH_CE_SELECT) p =
___CAST(___STRING_TYPE(___PATH_CE_SELECT),cpath);
___STRING_TYPE(___PATH_CE_SELECT) dir;
#ifndef USE_POSIX
#ifndef USE_WIN32
___CHAR_TYPE(___PATH_CE_SELECT) normalized_dir[___PATH_MAX_LENGTH+1+1];
___FILE *exist_check;
dir = normalized_dir;
if (p == 0)
p = ".";
while (*p != '\0')
*dir++ = *p++;
if (dir == normalized_dir || dir[-1] != '/')
*dir++ = '/';
*dir++ = '\0';
dir = normalized_dir;
while (dir[0] == '.' && dir[1] == '/' && dir[2] != '\0')
dir += 2;
exist_check = ___fopen (dir, "r");
if (exist_check == 0)
result = fnf_or_err_code_from_errno ();
else
{
___fclose (exist_check);
if ((e = ___NONNULLSTRING_to_SCMOBJ
(dir,
&result,
___RETURN_POS,
___CE(___PATH_CE_SELECT)))
!= ___FIX(___NO_ERR))
result = e;
else
___release_scmobj (result);
}
#endif
#endif
#ifdef USE_POSIX
___CHAR_TYPE(___PATH_CE_SELECT) old_dir[___PATH_MAX_LENGTH+1+1];
___CHAR_TYPE(___PATH_CE_SELECT) normalized_dir[___PATH_MAX_LENGTH+1+1];
dir = normalized_dir;
if (getcwd (old_dir, ___PATH_MAX_LENGTH) == 0)
e = err_code_from_errno ();
else
{
if (p == 0)
dir = old_dir;
else
{
if (chdir (p) < 0)
e = err_code_from_errno ();
else
{
if (getcwd (normalized_dir, ___PATH_MAX_LENGTH) == 0)
e = err_code_from_errno ();
else
e = ___FIX(___NO_ERR);
}
chdir (old_dir); /* ignore error */
}
}
if (e != ___FIX(___NO_ERR))
result = e;
else
{
p = dir;
while (*p != '\0')
p++;
if (p == dir || p[-1] != '/')
{
*p++ = '/';
*p++ = '\0';
}
if ((e = ___NONNULLSTRING_to_SCMOBJ
(dir,
&result,
___RETURN_POS,
___CE(___PATH_CE_SELECT)))
!= ___FIX(___NO_ERR))
result = e;
else
___release_scmobj (result);
}
#endif
#ifdef USE_WIN32
___CHAR_TYPE(___PATH_CE_SELECT) old_dir[___PATH_MAX_LENGTH+1+1];
___CHAR_TYPE(___PATH_CE_SELECT) normalized_dir[___PATH_MAX_LENGTH+1+1];
DWORD n;
dir = normalized_dir;
n = GetCurrentDirectory (___PATH_MAX_LENGTH+1,
old_dir);
if (n < 1 || n > ___PATH_MAX_LENGTH)
e = err_code_from_GetLastError ();
else
{
if (p == 0)
dir = old_dir;
else
{
if (!SetCurrentDirectory (p))
e = err_code_from_GetLastError ();
else
{
n = GetCurrentDirectory (___PATH_MAX_LENGTH+1,
normalized_dir);
if (n < 1 || n > ___PATH_MAX_LENGTH)
e = err_code_from_GetLastError ();
SetCurrentDirectory (old_dir); /* ignore error */
}
}
}
if (e != ___FIX(___NO_ERR))
result = e;
else
{
p = dir;
while (*p != '\0')
p++;
if (p == dir || (p[-1] != '\\' && p[-1] != '/'))
{
*p++ = '\\';
*p++ = '\0';
}
if ((e = ___NONNULLSTRING_to_SCMOBJ
(dir,
&result,
___RETURN_POS,
___CE(___PATH_CE_SELECT)))
!= ___FIX(___NO_ERR))
result = e;
else
___release_scmobj (result);
}
#endif
___release_string (cpath);
}
return result;
}
/*---------------------------------------------------------------------------*/
/* File system operations. */
___SCMOBJ ___os_create_directory
___P((___SCMOBJ path,
___SCMOBJ mode),
(path,
mode)
___SCMOBJ path;
___SCMOBJ mode;)
{
___SCMOBJ e;
void *cpath;
#ifndef USE_mkdir
#ifndef USE_CreateDirectory
e = ___FIX(___UNIMPL_ERR);
#endif
#endif
#ifdef USE_mkdir
#define ___CREATE_DIRECTORY_PATH_CE_SELECT(latin1,utf8,ucs2,ucs4,wchar,native) native
if ((e = ___SCMOBJ_to_NONNULLSTRING
(path,