#define PACKFILE_FLAG_TRUEOFFS (1 << 0)
// file compressed using the deflate algorithm
#define PACKFILE_FLAG_DEFLATED (1 << 1)
+// file is a symbolic link
+#define PACKFILE_FLAG_SYMLINK (1 << 2)
typedef struct packfile_s
{
typedef struct pack_s
{
char filename [MAX_OSPATH];
+ char shortname [MAX_QPATH];
int handle;
int ignorecase; // PK3 ignores case
int numfiles;
// Load the central directory in memory
central_dir = (unsigned char *)Mem_Alloc (tempmempool, eocd->cdir_size);
lseek (pack->handle, eocd->cdir_offset, SEEK_SET);
- read (pack->handle, central_dir, eocd->cdir_size);
+ if(read (pack->handle, central_dir, eocd->cdir_size) != (ssize_t) eocd->cdir_size)
+ {
+ Mem_Free (central_dir);
+ return -1;
+ }
// Extract the files properties
// The parsing is done "by hand" because some fields have variable sizes and
offset = BuffLittleLong (&ptr[42]);
packsize = BuffLittleLong (&ptr[20]);
realsize = BuffLittleLong (&ptr[24]);
+
+ switch(ptr[5]) // C_VERSION_MADE_BY_1
+ {
+ case 3: // UNIX_
+ case 2: // VMS_
+ case 16: // BEOS_
+ if((BuffLittleShort(&ptr[40]) & 0120000) == 0120000)
+ // can't use S_ISLNK here, as this has to compile on non-UNIX too
+ flags |= PACKFILE_FLAG_SYMLINK;
+ break;
+ }
+
FS_AddFileToPack (filename, pack, offset, packsize, realsize, flags);
}
}
============
FS_CreatePath
-Only used for FS_Open.
+Only used for FS_OpenRealFile.
============
*/
void FS_CreatePath (char *path)
#endif
if (packhandle < 0)
return NULL;
- read (packhandle, (void *)&header, sizeof(header));
+ if(read (packhandle, (void *)&header, sizeof(header)) != sizeof(header))
+ {
+ Con_Printf ("%s is not a packfile\n", packfile);
+ close(packhandle);
+ return NULL;
+ }
if (memcmp(header.id, "PACK", 4))
{
Con_Printf ("%s is not a packfile\n", packfile);
plain directories.
================
*/
-static qboolean FS_AddPack_Fullpath(const char *pakfile, qboolean *already_loaded, qboolean keep_plain_dirs)
+static qboolean FS_AddPack_Fullpath(const char *pakfile, const char *shortname, qboolean *already_loaded, qboolean keep_plain_dirs)
{
searchpath_t *search;
pack_t *pak = NULL;
if (pak)
{
+ strlcpy(pak->shortname, shortname, sizeof(pak->shortname));
+ //Con_DPrintf(" Registered pack with short name %s\n", shortname);
if(keep_plain_dirs)
{
// find the first item whose next one is a pack or NULL
dpsnprintf(fullpath, sizeof(fullpath), "%s%s", search->filename, pakfile);
- return FS_AddPack_Fullpath(fullpath, already_loaded, keep_plain_dirs);
+ return FS_AddPack_Fullpath(fullpath, pakfile, already_loaded, keep_plain_dirs);
}
{
if (!strcasecmp(FS_FileExtension(list.strings[i]), "pak"))
{
- FS_AddPack_Fullpath(list.strings[i], NULL, false);
+ FS_AddPack_Fullpath(list.strings[i], list.strings[i] + strlen(dir), NULL, false);
}
}
{
if (!strcasecmp(FS_FileExtension(list.strings[i]), "pk3"))
{
- FS_AddPack_Fullpath(list.strings[i], NULL, false);
+ FS_AddPack_Fullpath(list.strings[i], list.strings[i] + strlen(dir), NULL, false);
}
}
Look for a file in the search paths and open it in read-only mode
===========
*/
-qfile_t *FS_OpenReadFile (const char *filename, qboolean quiet, qboolean nonblocking)
+qfile_t *FS_OpenReadFile (const char *filename, qboolean quiet, qboolean nonblocking, int symlinkLevels)
{
searchpath_t *search;
int pack_ind;
}
// So, we found it in a package...
+
+ // Is it a PK3 symlink?
+ // TODO also handle directory symlinks by parsing the whole structure...
+ // but heck, file symlinks are good enough for now
+ if(search->pack->files[pack_ind].flags & PACKFILE_FLAG_SYMLINK)
+ {
+ if(symlinkLevels <= 0)
+ {
+ Con_Printf("symlink: %s: too many levels of symbolic links\n", filename);
+ return NULL;
+ }
+ else
+ {
+ char linkbuf[MAX_QPATH];
+ fs_offset_t count;
+ qfile_t *linkfile = FS_OpenPackedFile (search->pack, pack_ind);
+ const char *mergeslash;
+ char *mergestart;
+
+ if(!linkfile)
+ return NULL;
+ count = FS_Read(linkfile, linkbuf, sizeof(linkbuf) - 1);
+ FS_Close(linkfile);
+ if(count < 0)
+ return NULL;
+ linkbuf[count] = 0;
+
+ // Now combine the paths...
+ mergeslash = strrchr(filename, '/');
+ mergestart = linkbuf;
+ if(!mergeslash)
+ mergeslash = filename;
+ while(!strncmp(mergestart, "../", 3))
+ {
+ mergestart += 3;
+ while(mergeslash > filename)
+ {
+ --mergeslash;
+ if(*mergeslash == '/')
+ break;
+ }
+ }
+ // Now, mergestart will point to the path to be appended, and mergeslash points to where it should be appended
+ if(mergeslash == filename)
+ {
+ // Either mergeslash == filename, then we just replace the name (done below)
+ }
+ else
+ {
+ // Or, we append the name after mergeslash;
+ // or rather, we can also shift the linkbuf so we can put everything up to and including mergeslash first
+ int spaceNeeded = mergeslash - filename + 1;
+ int spaceRemoved = mergestart - linkbuf;
+ if(count - spaceRemoved + spaceNeeded >= MAX_QPATH)
+ {
+ Con_DPrintf("symlink: too long path rejected\n");
+ return NULL;
+ }
+ memmove(linkbuf + spaceNeeded, linkbuf + spaceRemoved, count - spaceRemoved);
+ memcpy(linkbuf, filename, spaceNeeded);
+ linkbuf[count - spaceRemoved + spaceNeeded] = 0;
+ mergestart = linkbuf;
+ }
+ if (!quiet && developer_loading.integer)
+ Con_DPrintf("symlink: %s -> %s\n", filename, mergestart);
+ if(FS_CheckNastyPath (mergestart, false))
+ {
+ Con_DPrintf("symlink: nasty path %s rejected\n", mergestart);
+ return NULL;
+ }
+ return FS_OpenReadFile(mergestart, quiet, nonblocking, symlinkLevels - 1);
+ }
+ }
+
return FS_OpenPackedFile (search->pack, pack_ind);
}
/*
====================
-FS_Open
+FS_OpenRealFile
-Open a file. The syntax is the same as fopen
+Open a file in the userpath. The syntax is the same as fopen
+Used for savegame scanning in menu, and all file writing.
====================
*/
-qfile_t* FS_Open (const char* filepath, const char* mode, qboolean quiet, qboolean nonblocking)
+qfile_t* FS_OpenRealFile (const char* filepath, const char* mode, qboolean quiet)
{
+ char real_path [MAX_OSPATH];
+
if (FS_CheckNastyPath(filepath, false))
{
- Con_Printf("FS_Open(\"%s\", \"%s\", %s): nasty filename rejected\n", filepath, mode, quiet ? "true" : "false");
+ Con_Printf("FS_OpenRealFile(\"%s\", \"%s\", %s): nasty filename rejected\n", filepath, mode, quiet ? "true" : "false");
return NULL;
}
- // If the file is opened in "write", "append", or "read/write" mode
+ dpsnprintf (real_path, sizeof (real_path), "%s/%s", fs_gamedir, filepath);
+
+ // If the file is opened in "write", "append", or "read/write" mode,
+ // create directories up to the file.
if (mode[0] == 'w' || mode[0] == 'a' || strchr (mode, '+'))
- {
- char real_path [MAX_OSPATH];
+ FS_CreatePath (real_path);
+ return FS_SysOpen (real_path, mode, false);
+}
- // Open the file on disk directly
- dpsnprintf (real_path, sizeof (real_path), "%s/%s", fs_gamedir, filepath);
- // Create directories up to the file
- FS_CreatePath (real_path);
+/*
+====================
+FS_OpenVirtualFile
- return FS_SysOpen (real_path, mode, nonblocking);
+Open a file. The syntax is the same as fopen
+====================
+*/
+qfile_t* FS_OpenVirtualFile (const char* filepath, qboolean quiet)
+{
+ if (FS_CheckNastyPath(filepath, false))
+ {
+ Con_Printf("FS_OpenVirtualFile(\"%s\", %s): nasty filename rejected\n", filepath, quiet ? "true" : "false");
+ return NULL;
}
- // Else, we look at the various search paths and open the file in read-only mode
- else
- return FS_OpenReadFile (filepath, quiet, nonblocking);
+
+ return FS_OpenReadFile (filepath, quiet, false, 16);
}
unsigned char *buf = NULL;
fs_offset_t filesize = 0;
- file = FS_Open (path, "rb", quiet, false);
+ file = FS_OpenVirtualFile(path, quiet);
if (file)
{
filesize = file->real_length;
+ if(filesize < 0)
+ {
+ Con_Printf("FS_LoadFile(\"%s\", pool, %s, filesizepointer): trying to open a non-regular file\n", path, quiet ? "true" : "false");
+ FS_Close(file);
+ return NULL;
+ }
+
buf = (unsigned char *)Mem_Alloc (pool, filesize + 1);
buf[filesize] = '\0';
FS_Read (file, buf, filesize);
{
qfile_t *file;
- file = FS_Open (filename, "wb", false, false);
+ file = FS_OpenRealFile(filename, "wb", false);
if (!file)
{
Con_Printf("FS_WriteFile: failed on %s\n", filename);
int index;
searchpath_t *sp = FS_FindFile(filename, &index, true);
if(sp && sp->pack)
- return sp->pack->filename;
+ return sp->pack->shortname;
else
return 0;
}
projects / xonotic / darkplaces.git / blobdiff