/
physfs.c
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/**
* PhysicsFS; a portable, flexible file i/o abstraction.
*
* Documentation is in physfs.h. It's verbose, honest. :)
*
* Please see the file LICENSE in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
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#if HAVE_CONFIG_H
# include <config.h>
#endif
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include <fcntl.h>
#include <errno.h>
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#include <assert.h>
#include "physfs.h"
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#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
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typedef struct __PHYSFS_ERRMSGTYPE__
{
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PHYSFS_uint64 tid;
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int errorAvailable;
char errorString[80];
struct __PHYSFS_ERRMSGTYPE__ *next;
} ErrMsg;
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typedef struct __PHYSFS_DIRINFO__
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{
char *dirName;
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DirHandle *dirHandle;
struct __PHYSFS_DIRINFO__ *next;
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} PhysDirInfo;
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typedef struct __PHYSFS_FILEHANDLELIST__
{
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PHYSFS_file handle;
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struct __PHYSFS_FILEHANDLELIST__ *next;
} FileHandleList;
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/* The various i/o drivers... */
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#if (defined PHYSFS_SUPPORTS_ZIP)
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extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ZIP;
extern const DirFunctions __PHYSFS_DirFunctions_ZIP;
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#endif
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#if (defined PHYSFS_SUPPORTS_GRP)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_GRP;
extern const DirFunctions __PHYSFS_DirFunctions_GRP;
#endif
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extern const DirFunctions __PHYSFS_DirFunctions_DIR;
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static const PHYSFS_ArchiveInfo *supported_types[] =
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{
#if (defined PHYSFS_SUPPORTS_ZIP)
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&__PHYSFS_ArchiveInfo_ZIP,
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#endif
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#if (defined PHYSFS_SUPPORTS_GRP)
&__PHYSFS_ArchiveInfo_GRP,
#endif
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NULL
};
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static const DirFunctions *dirFunctions[] =
{
#if (defined PHYSFS_SUPPORTS_ZIP)
&__PHYSFS_DirFunctions_ZIP,
#endif
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#if (defined PHYSFS_SUPPORTS_GRP)
&__PHYSFS_DirFunctions_GRP,
#endif
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&__PHYSFS_DirFunctions_DIR,
NULL
};
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/* General PhysicsFS state ... */
static int initialized = 0;
static ErrMsg *errorMessages = NULL;
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static PhysDirInfo *searchPath = NULL;
static PhysDirInfo *writeDir = NULL;
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static FileHandleList *openWriteList = NULL;
static FileHandleList *openReadList = NULL;
static char *baseDir = NULL;
static char *userDir = NULL;
static int allowSymLinks = 0;
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/* mutexes ... */
static void *errorLock = NULL; /* protects error message list. */
static void *stateLock = NULL; /* protects other PhysFS static state. */
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/* functions ... */
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static ErrMsg *findErrorForCurrentThread(void)
{
ErrMsg *i;
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PHYSFS_uint64 tid;
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if (errorLock != NULL)
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__PHYSFS_platformGrabMutex(errorLock);
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if (errorMessages != NULL)
{
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tid = __PHYSFS_platformGetThreadID();
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for (i = errorMessages; i != NULL; i = i->next)
{
if (i->tid == tid)
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{
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if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
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return(i);
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} /* if */
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} /* for */
} /* if */
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if (errorLock != NULL)
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__PHYSFS_platformReleaseMutex(errorLock);
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return(NULL); /* no error available. */
} /* findErrorForCurrentThread */
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void __PHYSFS_setError(const char *str)
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{
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ErrMsg *err;
if (str == NULL)
return;
err = findErrorForCurrentThread();
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if (err == NULL)
{
err = (ErrMsg *) malloc(sizeof (ErrMsg));
if (err == NULL)
return; /* uhh...? */
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memset((void *) err, '\0', sizeof (ErrMsg));
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err->tid = __PHYSFS_platformGetThreadID();
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if (errorLock != NULL)
__PHYSFS_platformGrabMutex(errorLock);
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err->next = errorMessages;
errorMessages = err;
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if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
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} /* if */
err->errorAvailable = 1;
strncpy(err->errorString, str, sizeof (err->errorString));
err->errorString[sizeof (err->errorString) - 1] = '\0';
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} /* __PHYSFS_setError */
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const char *PHYSFS_getLastError(void)
{
ErrMsg *err = findErrorForCurrentThread();
if ((err == NULL) || (!err->errorAvailable))
return(NULL);
err->errorAvailable = 0;
return(err->errorString);
} /* PHYSFS_getLastError */
/* MAKE SURE that errorLock is held before calling this! */
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static void freeErrorMessages(void)
{
ErrMsg *i;
ErrMsg *next;
for (i = errorMessages; i != NULL; i = next)
{
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next = i->next;
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free(i);
} /* for */
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errorMessages = NULL;
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} /* freeErrorMessages */
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void PHYSFS_getLinkedVersion(PHYSFS_Version *ver)
{
if (ver != NULL)
{
ver->major = PHYSFS_VER_MAJOR;
ver->minor = PHYSFS_VER_MINOR;
ver->patch = PHYSFS_VER_PATCH;
} /* if */
} /* PHYSFS_getLinkedVersion */
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static const char *find_filename_extension(const char *fname)
{
const char *retval = strchr(fname, '.');
const char *p = retval;
while (p != NULL)
{
p = strchr(p + 1, '.');
if (p != NULL)
retval = p;
} /* while */
if (retval != NULL)
retval++; /* skip '.' */
return(retval);
} /* find_filename_extension */
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static DirHandle *openDirectory(const char *d, int forWriting)
{
const DirFunctions **i;
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const char *ext;
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BAIL_IF_MACRO(!__PHYSFS_platformExists(d), ERR_NO_SUCH_FILE, NULL);
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ext = find_filename_extension(d);
if (ext != NULL)
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{
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/* Look for archivers with matching file extensions first... */
for (i = dirFunctions; *i != NULL; i++)
{
if (__PHYSFS_platformStricmp(ext, (*i)->info->extension) == 0)
{
if ((*i)->isArchive(d, forWriting))
return( (*i)->openArchive(d, forWriting) );
} /* if */
} /* for */
/* failing an exact file extension match, try all the others... */
for (i = dirFunctions; *i != NULL; i++)
{
if (__PHYSFS_platformStricmp(ext, (*i)->info->extension) != 0)
{
if ((*i)->isArchive(d, forWriting))
return( (*i)->openArchive(d, forWriting) );
} /* if */
} /* for */
} /* if */
else /* no extension? Try them all. */
{
for (i = dirFunctions; *i != NULL; i++)
{
if ((*i)->isArchive(d, forWriting))
return( (*i)->openArchive(d, forWriting) );
} /* for */
} /* else */
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__PHYSFS_setError(ERR_UNSUPPORTED_ARCHIVE);
return(NULL);
} /* openDirectory */
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static PhysDirInfo *buildDirInfo(const char *newDir, int forWriting)
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{
DirHandle *dirHandle = NULL;
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PhysDirInfo *di = NULL;
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BAIL_IF_MACRO(newDir == NULL, ERR_INVALID_ARGUMENT, 0);
dirHandle = openDirectory(newDir, forWriting);
BAIL_IF_MACRO(dirHandle == NULL, NULL, 0);
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di = (PhysDirInfo *) malloc(sizeof (PhysDirInfo));
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if (di == NULL)
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{
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dirHandle->funcs->dirClose(dirHandle);
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BAIL_IF_MACRO(di == NULL, ERR_OUT_OF_MEMORY, 0);
} /* if */
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di->dirName = (char *) malloc(strlen(newDir) + 1);
if (di->dirName == NULL)
{
free(di);
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dirHandle->funcs->dirClose(dirHandle);
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BAIL_MACRO(ERR_OUT_OF_MEMORY, 0);
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} /* if */
di->next = NULL;
di->dirHandle = dirHandle;
strcpy(di->dirName, newDir);
return(di);
} /* buildDirInfo */
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/* MAKE SURE you've got the stateLock held before calling this! */
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static int freeDirInfo(PhysDirInfo *di, FileHandleList *openList)
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{
FileHandleList *i;
if (di == NULL)
return(1);
for (i = openList; i != NULL; i = i->next)
{
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const DirHandle *h = ((FileHandle *) &(i->handle.opaque))->dirHandle;
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BAIL_IF_MACRO(h == di->dirHandle, ERR_FILES_STILL_OPEN, 0);
} /* for */
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di->dirHandle->funcs->dirClose(di->dirHandle);
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free(di->dirName);
free(di);
return(1);
} /* freeDirInfo */
static char *calculateUserDir(void)
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{
char *retval = NULL;
const char *str = NULL;
str = __PHYSFS_platformGetUserDir();
if (str != NULL)
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retval = (char *) str;
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else
{
const char *dirsep = PHYSFS_getDirSeparator();
const char *uname = __PHYSFS_platformGetUserName();
str = (uname != NULL) ? uname : "default";
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retval = (char *) malloc(strlen(baseDir) + strlen(str) +
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strlen(dirsep) + 6);
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if (retval == NULL)
__PHYSFS_setError(ERR_OUT_OF_MEMORY);
else
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sprintf(retval, "%susers%s%s", baseDir, dirsep, str);
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if (uname != NULL)
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free((void *) uname);
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} /* else */
return(retval);
} /* calculateUserDir */
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static int appendDirSep(char **dir)
{
const char *dirsep = PHYSFS_getDirSeparator();
char *ptr;
if (strcmp((*dir + strlen(*dir)) - strlen(dirsep), dirsep) == 0)
return(1);
ptr = realloc(*dir, strlen(*dir) + strlen(dirsep) + 1);
if (!ptr)
{
free(*dir);
return(0);
} /* if */
strcat(ptr, dirsep);
*dir = ptr;
return(1);
} /* appendDirSep */
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static char *calculateBaseDir(const char *argv0)
{
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const char *dirsep = PHYSFS_getDirSeparator();
char *retval;
char *ptr;
/*
* See if the platform driver wants to handle this for us...
*/
retval = __PHYSFS_platformCalcBaseDir(argv0);
if (retval != NULL)
return(retval);
/*
* Determine if there's a path on argv0. If there is, that's the base dir.
*/
ptr = strstr(argv0, dirsep);
if (ptr != NULL)
{
char *p = ptr;
size_t size;
while (p != NULL)
{
ptr = p;
p = strstr(p + 1, dirsep);
} /* while */
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size = (size_t) (ptr - argv0);
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retval = (char *) malloc(size + 1);
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
memcpy(retval, argv0, size);
retval[size] = '\0';
return(retval);
} /* if */
/*
* Last ditch effort: it's the current working directory. (*shrug*)
*/
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retval = __PHYSFS_platformCurrentDir();
if(retval != NULL) {
return(retval);
}
/*
* Ok, current directory doesn't exist, use the root directory.
* Not a good alternative, but it only happens if the current
* directory was deleted from under the program.
*/
retval = (char *) malloc(strlen(dirsep) + 1);
strcpy(retval, dirsep);
return(retval);
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} /* calculateBaseDir */
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static int initializeMutexes(void)
{
errorLock = __PHYSFS_platformCreateMutex();
if (errorLock == NULL)
goto initializeMutexes_failed;
stateLock = __PHYSFS_platformCreateMutex();
if (stateLock == NULL)
goto initializeMutexes_failed;
return(1); /* success. */
initializeMutexes_failed:
if (errorLock != NULL)
__PHYSFS_platformDestroyMutex(errorLock);
if (stateLock != NULL)
__PHYSFS_platformDestroyMutex(stateLock);
errorLock = stateLock = NULL;
return(0); /* failed. */
} /* initializeMutexes */
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int PHYSFS_init(const char *argv0)
{
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char *ptr;
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BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0);
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BAIL_IF_MACRO(!__PHYSFS_platformInit(), NULL, 0);
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BAIL_IF_MACRO(!initializeMutexes(), NULL, 0);
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baseDir = calculateBaseDir(argv0);
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BAIL_IF_MACRO(baseDir == NULL, NULL, 0);
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ptr = __PHYSFS_platformRealPath(baseDir);
free(baseDir);
BAIL_IF_MACRO(ptr == NULL, NULL, 0);
baseDir = ptr;
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BAIL_IF_MACRO(!appendDirSep(&baseDir), NULL, 0);
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userDir = calculateUserDir();
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if (userDir != NULL)
{
ptr = __PHYSFS_platformRealPath(userDir);
free(userDir);
userDir = ptr;
} /* if */
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if ((userDir == NULL) || (!appendDirSep(&userDir)))
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{
free(baseDir);
baseDir = NULL;
return(0);
} /* if */
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initialized = 1;
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/* This makes sure that the error subsystem is initialized. */
__PHYSFS_setError(PHYSFS_getLastError());
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return(1);
} /* PHYSFS_init */
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/* MAKE SURE you hold stateLock before calling this! */
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static int closeFileHandleList(FileHandleList **list)
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{
FileHandleList *i;
FileHandleList *next = NULL;
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FileHandle *h;
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for (i = *list; i != NULL; i = next)
{
next = i->next;
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h = (FileHandle *) (i->handle.opaque);
if (!h->funcs->fileClose(h))
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{
*list = i;
return(0);
} /* if */
free(i);
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} /* for */
*list = NULL;
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return(1);
} /* closeFileHandleList */
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/* MAKE SURE you hold the stateLock before calling this! */
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static void freeSearchPath(void)
{
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PhysDirInfo *i;
PhysDirInfo *next = NULL;
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closeFileHandleList(&openReadList);
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if (searchPath != NULL)
{
for (i = searchPath; i != NULL; i = next)
{
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next = i->next;
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freeDirInfo(i, openReadList);
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} /* for */
searchPath = NULL;
} /* if */
} /* freeSearchPath */
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int PHYSFS_deinit(void)
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{
BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0);
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BAIL_IF_MACRO(!__PHYSFS_platformDeinit(), NULL, 0);
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closeFileHandleList(&openWriteList);
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BAIL_IF_MACRO(!PHYSFS_setWriteDir(NULL), ERR_FILES_STILL_OPEN, 0);
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freeSearchPath();
freeErrorMessages();
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if (baseDir != NULL)
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{
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free(baseDir);
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baseDir = NULL;
} /* if */
if (userDir != NULL)
{
free(userDir);
userDir = NULL;
} /* if */
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allowSymLinks = 0;
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initialized = 0;
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__PHYSFS_platformDestroyMutex(errorLock);
__PHYSFS_platformDestroyMutex(stateLock);
errorLock = stateLock = NULL;
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return(1);
} /* PHYSFS_deinit */
const PHYSFS_ArchiveInfo **PHYSFS_supportedArchiveTypes(void)
{
return(supported_types);
} /* PHYSFS_supportedArchiveTypes */
void PHYSFS_freeList(void *list)
{
void **i;
for (i = (void **) list; *i != NULL; i++)
free(*i);
free(list);
} /* PHYSFS_freeList */
const char *PHYSFS_getDirSeparator(void)
{
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return(__PHYSFS_platformDirSeparator);
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} /* PHYSFS_getDirSeparator */
char **PHYSFS_getCdRomDirs(void)
{
return(__PHYSFS_platformDetectAvailableCDs());
} /* PHYSFS_getCdRomDirs */
const char *PHYSFS_getBaseDir(void)
{
return(baseDir); /* this is calculated in PHYSFS_init()... */
} /* PHYSFS_getBaseDir */
const char *PHYSFS_getUserDir(void)
{
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return(userDir); /* this is calculated in PHYSFS_init()... */
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} /* PHYSFS_getUserDir */
const char *PHYSFS_getWriteDir(void)
{
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const char *retval = NULL;
__PHYSFS_platformGrabMutex(stateLock);
if (writeDir != NULL)
retval = writeDir->dirName;
__PHYSFS_platformReleaseMutex(stateLock);
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return(retval);
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} /* PHYSFS_getWriteDir */
int PHYSFS_setWriteDir(const char *newDir)
{
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int retval = 1;
__PHYSFS_platformGrabMutex(stateLock);
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if (writeDir != NULL)
{
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BAIL_IF_MACRO_MUTEX(!freeDirInfo(writeDir, openWriteList), NULL,
stateLock, 0);
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writeDir = NULL;
} /* if */
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if (newDir != NULL)
{
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writeDir = buildDirInfo(newDir, 1);
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retval = (writeDir != NULL);
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} /* if */
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__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
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} /* PHYSFS_setWriteDir */
int PHYSFS_addToSearchPath(const char *newDir, int appendToPath)
{
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PhysDirInfo *di;
PhysDirInfo *prev = NULL;
PhysDirInfo *i;
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__PHYSFS_platformGrabMutex(stateLock);
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for (i = searchPath; i != NULL; i = i->next)
{
/* already in search path? */
BAIL_IF_MACRO_MUTEX(strcmp(newDir, i->dirName)==0, NULL, stateLock, 1);
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prev = i;
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} /* for */
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di = buildDirInfo(newDir, 0);
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BAIL_IF_MACRO_MUTEX(di == NULL, NULL, stateLock, 0);
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if (appendToPath)
{
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di->next = NULL;
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if (prev == NULL)
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searchPath = di;
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else
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prev->next = di;
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} /* if */
else
{
di->next = searchPath;
searchPath = di;
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} /* else */
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__PHYSFS_platformReleaseMutex(stateLock);
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return(1);
} /* PHYSFS_addToSearchPath */
int PHYSFS_removeFromSearchPath(const char *oldDir)
{
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PhysDirInfo *i;
PhysDirInfo *prev = NULL;
PhysDirInfo *next = NULL;
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BAIL_IF_MACRO(oldDir == NULL, ERR_INVALID_ARGUMENT, 0);
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__PHYSFS_platformGrabMutex(stateLock);
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for (i = searchPath; i != NULL; i = i->next)
{
if (strcmp(i->dirName, oldDir) == 0)
{
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next = i->next;
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BAIL_IF_MACRO_MUTEX(!freeDirInfo(i, openReadList), NULL,
stateLock, 0);
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if (prev == NULL)
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searchPath = next;
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else
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prev->next = next;
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BAIL_MACRO_MUTEX(NULL, stateLock, 1);
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} /* if */
prev = i;
} /* for */
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BAIL_MACRO_MUTEX(ERR_NOT_IN_SEARCH_PATH, stateLock, 0);
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} /* PHYSFS_removeFromSearchPath */
char **PHYSFS_getSearchPath(void)
{
int count = 1;
int x;
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PhysDirInfo *i;
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char **retval;
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__PHYSFS_platformGrabMutex(stateLock);
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for (i = searchPath; i != NULL; i = i->next)
count++;
retval = (char **) malloc(sizeof (char *) * count);
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BAIL_IF_MACRO_MUTEX(!retval, ERR_OUT_OF_MEMORY, stateLock, NULL);
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count--;
retval[count] = NULL;
for (i = searchPath, x = 0; x < count; i = i->next, x++)
{
retval[x] = (char *) malloc(strlen(i->dirName) + 1);
if (retval[x] == NULL) /* this is friggin' ugly. */
{
while (x > 0)
{
x--;
free(retval[x]);
} /* while */
free(retval);
754
BAIL_MACRO_MUTEX(ERR_OUT_OF_MEMORY, stateLock, NULL);
755
756
757
758
759
} /* if */
strcpy(retval[x], i->dirName);
} /* for */
760
__PHYSFS_platformReleaseMutex(stateLock);
761
762
763
764
return(retval);
} /* PHYSFS_getSearchPath */
765
766
767
int PHYSFS_setSaneConfig(const char *organization, const char *appName,
const char *archiveExt, int includeCdRoms,
int archivesFirst)
768
{
769
770
771
772
773
const char *basedir = PHYSFS_getBaseDir();
const char *userdir = PHYSFS_getUserDir();
const char *dirsep = PHYSFS_getDirSeparator();
char *str;
774
775
BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0);
776
/* set write dir... */
777
778
str = malloc(strlen(userdir) + (strlen(organization) * 2) +
(strlen(appName) * 2) + (strlen(dirsep) * 3) + 2);
779
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
780
sprintf(str, "%s.%s%s%s", userdir, organization, dirsep, appName);
781
782
783
if (!PHYSFS_setWriteDir(str))
{
784
785
int no_write = 0;
sprintf(str, ".%s/%s", organization, appName);
786
if ( (PHYSFS_setWriteDir(userdir)) &&
787
(PHYSFS_mkdir(str)) )
788
{
789
790
791
sprintf(str, "%s.%s%s%s", userdir, organization, dirsep, appName);
if (!PHYSFS_setWriteDir(str))
no_write = 1;
792
793
} /* if */
else
794
{
795
no_write = 1;
796
} /* else */
797
798
799
800
801
802
803
if (no_write)
{
PHYSFS_setWriteDir(NULL); /* just in case. */
free(str);
BAIL_MACRO(ERR_CANT_SET_WRITE_DIR, 0);
} /* if */
804
805
} /* if */
806
807
/* Put write dir first in search path... */
PHYSFS_addToSearchPath(str, 0);
808
809
free(str);
810
/* Put base path on search path... */
811
812
813
814
815
816
817
818
PHYSFS_addToSearchPath(basedir, 1);
/* handle CD-ROMs... */
if (includeCdRoms)
{
char **cds = PHYSFS_getCdRomDirs();
char **i;
for (i = cds; *i != NULL; i++)
819
PHYSFS_addToSearchPath(*i, 1);
820
821
822
823
824
825
826
827
828
PHYSFS_freeList(cds);
} /* if */
/* Root out archives, and add them to search path... */
if (archiveExt != NULL)
{
char **rc = PHYSFS_enumerateFiles("");
char **i;
829
size_t extlen = strlen(archiveExt);
830
831
832
833
char *ext;
for (i = rc; *i != NULL; i++)
{
834
835
size_t l = strlen(*i);
if ((l > extlen) && ((*i)[l - extlen - 1] == '.'))
836
837
838
839
840
841
842
843
844
{
ext = (*i) + (l - extlen);
if (__PHYSFS_platformStricmp(ext, archiveExt) == 0)
{
const char *d = PHYSFS_getRealDir(*i);
str = malloc(strlen(d) + strlen(dirsep) + l + 1);
if (str != NULL)
{
sprintf(str, "%s%s%s", d, dirsep, *i);
845
PHYSFS_addToSearchPath(str, archivesFirst == 0);
846
847
848
849
850
851
852
853
854
855
free(str);
} /* if */
} /* if */
} /* if */
} /* for */
PHYSFS_freeList(rc);
} /* if */
return(1);
856
857
858
} /* PHYSFS_setSaneConfig */
859
860
861
862
863
864
void PHYSFS_permitSymbolicLinks(int allow)
{
allowSymLinks = allow;
} /* PHYSFS_permitSymbolicLinks */
865
/* string manipulation in C makes my ass itch. */
866
867
868
char * __PHYSFS_convertToDependent(const char *prepend,
const char *dirName,
const char *append)
869
{
870
const char *dirsep = __PHYSFS_platformDirSeparator;
871
size_t sepsize = strlen(dirsep);
872
873
874
875
876
char *str;
char *i1;
char *i2;
size_t allocSize;
877
878
879
while (*dirName == '/')
dirName++;
880
allocSize = strlen(dirName) + 1;
881
882
883
884
885
886
887
888
if (prepend != NULL)
allocSize += strlen(prepend) + sepsize;
if (append != NULL)
allocSize += strlen(append) + sepsize;
/* make sure there's enough space if the dir separator is bigger. */
if (sepsize > 1)
{
889
890
str = (char *) dirName;
do
891
{
892
893
894
str = strchr(str, '/');
if (str != NULL)
{
895
allocSize += (sepsize - 1);
896
897
898
str++;
} /* if */
} while (str != NULL);
899
900
901
902
903
} /* if */
str = (char *) malloc(allocSize);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, NULL);
904
905
906
if (prepend == NULL)
*str = '\0';
else
907
908
909
{
strcpy(str, prepend);
strcat(str, dirsep);
910
} /* else */
911
912
for (i1 = (char *) dirName, i2 = str + strlen(str); *i1; i1++, i2++)
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
{
if (*i1 == '/')
{
strcpy(i2, dirsep);
i2 += sepsize;
} /* if */
else
{
*i2 = *i1;
} /* else */
} /* for */
*i2 = '\0';
if (append)
{
strcat(str, dirsep);
strcpy(str, append);
} /* if */
return(str);
933
} /* __PHYSFS_convertToDependent */
934
935
936
int __PHYSFS_verifySecurity(DirHandle *h, const char *fname)
937
{
938
939
940
int retval = 1;
char *start;
char *end;
941
942
char *str;
943
944
945
start = str = malloc(strlen(fname) + 1);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
strcpy(str, fname);
946
947
948
949
950
951
952
953
954
while (1)
{
end = strchr(start, '/');
if (end != NULL)
*end = '\0';
if ( (strcmp(start, ".") == 0) ||
(strcmp(start, "..") == 0) ||
955
(strchr(start, '\\') != NULL) ||
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
(strchr(start, ':') != NULL) )
{
__PHYSFS_setError(ERR_INSECURE_FNAME);
retval = 0;
break;
} /* if */
if ((!allowSymLinks) && (h->funcs->isSymLink(h, str)))
{
__PHYSFS_setError(ERR_SYMLINK_DISALLOWED);
retval = 0;
break;
} /* if */
if (end == NULL)
break;
*end = '/';
start = end + 1;
} /* while */
976
977
free(str);
978
979
return(retval);
} /* __PHYSFS_verifySecurity */
980
981
982
int PHYSFS_mkdir(const char *dname)
983
{
984
DirHandle *h;
985
char *str;
986
987
988
char *start;
char *end;
int retval = 0;
989
990
991
992
BAIL_IF_MACRO(dname == NULL, ERR_INVALID_ARGUMENT, 0);
while (*dname == '/')
dname++;
993
994
995
__PHYSFS_platformGrabMutex(stateLock);
BAIL_IF_MACRO_MUTEX(writeDir == NULL, ERR_NO_WRITE_DIR, stateLock, 0);
996
h = writeDir->dirHandle;
997
998
999
1000
BAIL_IF_MACRO_MUTEX(!h->funcs->mkdir, ERR_NOT_SUPPORTED, stateLock, 0);
BAIL_IF_MACRO_MUTEX(!__PHYSFS_verifySecurity(h, dname), NULL, stateLock, 0);
start = str = malloc(strlen(dname) + 1);
BAIL_IF_MACRO_MUTEX(str == NULL, ERR_OUT_OF_MEMORY, stateLock, 0);