Added uio_getPhysicalAccess(), uio_getMountFileSystemType() and

some small improvements.


git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@1283 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/src/sc2code/libs/uio/debug.c

@@ -25,6 +25,9 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <time.h>
+#ifdef __unix__
+#	include <sys/wait.h>
+#endif
 
 #include "debug.h"
 #include "uioport.h"
@@ -58,6 +61,7 @@ void unInitRepository(void);
 
 static int debugCmdCat(DebugContext *debugContext, int argc, char *argv[]);
 static int debugCmdCd(DebugContext *debugContext, int argc, char *argv[]);
+static int debugCmdExec(DebugContext *debugContext, int argc, char *argv[]);
 static int debugCmdExit(DebugContext *debugContext, int argc, char *argv[]);
 static int debugCmdLs(DebugContext *debugContext, int argc, char *argv[]);
 static int debugCmdMem(DebugContext *debugContext, int argc, char *argv[]);
@@ -87,6 +91,7 @@ debugMountOne(uio_Repository *destRep, const char *mountPoint,
 DebugCommand debugCommands[] = {
 	{ "cat", debugCmdCat },
 	{ "cd", debugCmdCd },
+	{ "exec", debugCmdExec },
 	{ "exit", debugCmdExit },
 	{ "fwritetest", debugCmdFwriteTest },
 	{ "ls", debugCmdLs },
@@ -294,12 +299,12 @@ makeArgs(char *lineBuf, int *argc, char ***argv) {
 	numArg = 0;
 	ptr = lineBuf;
 	while(1) {
-		while (isspace(*ptr))
+		while (isspace((int) *ptr))
 			ptr++;
 		if (*ptr == '\0')
 			break;
 		numArg++;
-		while (!isspace(*ptr))
+		while (!isspace((int) *ptr))
 			ptr++;
 	}
 
@@ -307,13 +312,13 @@ makeArgs(char *lineBuf, int *argc, char ***argv) {
 	numArg = 0;
 	ptr = lineBuf;
 	while(1) {
-		while (isspace(*ptr))
+		while (isspace((int) *ptr))
 			ptr++;
 		if (*ptr == '\0')
 			break;
 		args[numArg] = ptr;
 		numArg++;
-		while (!isspace(*ptr))
+		while (!isspace((int) *ptr))
 			ptr++;
 		if (*ptr == '\0')
 			break;
@@ -424,6 +429,114 @@ debugCmdCd(DebugContext *debugContext, int argc, char *argv[]) {
 	return 0;
 }
 
+static int
+debugCmdExec(DebugContext *debugContext, int argc, char *argv[]) {
+	int i;
+	char **newArgs;
+	int errCode = 0;
+
+	if (argc < 2) {
+		fprintf(debugContext->err, "Invalid number of arguments.\n");
+		return 1;
+	}
+
+	newArgs = uio_malloc(argc * sizeof (char *));
+	newArgs[0] = argv[1];
+	
+	for (i = 2; i < argc; i++) {
+		int retVal;
+		uio_FileSystemID fsID;
+		uio_MountHandle *mountHandle;
+		
+		retVal = uio_getFileLocation(debugContext->cwd, argv[i], O_RDONLY,
+				&mountHandle, &newArgs[i - 1]);
+		if (retVal == -1) {
+			// No match; we keep what's typed litterally.
+			newArgs[i - 1] = argv[i];
+			continue;
+		}
+		
+		fsID = uio_getMountFileSystemType(mountHandle);
+		if (fsID != uio_FSTYPE_STDIO) {
+			// Wrong file system type.
+			fprintf(debugContext->err,
+					"Cannot execute: %s is not in a stdio filesystem.\n",
+					argv[i]);
+			errCode = 0;
+			argc = i + 1;
+			goto err;
+		}
+	}
+	newArgs[argc - 1] = NULL;
+
+	fprintf(debugContext->err, "Executing: %s", newArgs[0]);
+	for (i = 1; i < argc - 1; i++)
+		fprintf(debugContext->err, " %s", newArgs[i]);
+	fprintf(debugContext->err, "\n");
+
+#ifdef __unix__
+	{
+		pid_t pid;
+		
+		pid = fork();
+		switch (pid) {
+			case -1:
+				fprintf(debugContext->err, "Error: fork() failed: %s.\n",
+						strerror(errno));
+				break;
+			case 0:
+				// child
+				execvp(newArgs[0], newArgs);
+				fprintf(debugContext->err, "Error: execvp() failed: %s.\n",
+						strerror(errno));
+				_exit(EXIT_FAILURE);
+				break;
+			default: {
+				// parent
+				int status;
+				pid_t retVal;
+
+				while (1) {
+					retVal = waitpid(pid, &status, 0);
+					if (retVal != -1)
+						break;
+					if (errno != EINTR) {
+						fprintf(debugContext->err, "Error: waitpid() "
+								"failed: %s\n", strerror(errno));
+						break;
+					}
+				}
+				if (retVal == -1)
+					break;
+
+				if (WIFEXITED(status)) {
+					fprintf(debugContext->err, "Exit status: %d\n",
+							WEXITSTATUS(status));
+				} else if (WIFSIGNALED(status)) {
+					fprintf(debugContext->err, "Terminated on signal %d.\n",
+							WTERMSIG(status));
+				} else {
+					fprintf(debugContext->err, "Error: weird exit status.\n");
+				}
+				break;
+			}
+		}
+	}
+#else
+	fprintf(debugContext->err, "Cannot execute: not supported on this "
+			"platform.\n");
+#endif
+
+err:
+	for (i = 1; i < argc; i++) {
+		if (argv[i] != newArgs[i - 1])
+			uio_free(newArgs[i - 1]);
+	}
+	uio_free(newArgs);
+
+	return errCode;
+}
+
 static int
 debugCmdExit(DebugContext *debugContext, int argc, char *argv[]) {
 	debugContext->exit = true;

sc2/src/sc2code/libs/uio/doc/todo

@@ -36,8 +36,12 @@ Bugs:
 - 'openDir(repository, "dir/")' will have the trailing '/'
   in the dirHandle, which will cause problems.
 - uio_rename() doesn't work on directories
-  uio_GetPhysicalAccess() needs to be changed so that it works the same on
+  uio_getPhysicalAccess() needs to be changed so that it works the same on
   dirs as on files. stat() can be cleaned up too then.
+- uio_getPhysicalAccess() will not return ENOENT when (only) the last
+  component does not exist, even when O_RDONLY is used.
+  For O_RDRW, O_CREAT should probably be checked too (function description
+  needs to be updated too then).
 
 Extra features (not necessary for UQM):
 - Make functions to use for uio_malloc, uio_free and uio_realloc

sc2/src/sc2code/libs/uio/io.c

@@ -325,6 +325,11 @@ uio_unmountAllDirs(uio_Repository *repository) {
 	return 0;
 }
 
+uio_FileSystemID
+uio_getMountFileSystemType(uio_MountHandle *mountHandle) {
+	return mountHandle->mountInfo->fsID;
+}
+
 int
 uio_close(uio_Handle *handle) {
 	uio_Handle_unref(handle);
@@ -340,15 +345,15 @@ uio_rename(uio_DirHandle *oldDir, const char *oldPath,
 	int retVal;
 
 	if (uio_getPhysicalAccess(oldDir, oldPath, O_RDONLY, 0,
-			&oldReadMountInfo, &oldPReadDir,
-			NULL, NULL, &oldName) == -1) {
+			&oldReadMountInfo, &oldPReadDir, NULL,
+			NULL, NULL, NULL, &oldName) == -1) {
 		// errno is set
 		return -1;
 	}
 
 	if (uio_getPhysicalAccess(newDir, newPath, O_WRONLY | O_CREAT | O_EXCL,
-			uio_GPA_NOWRITE, &newReadMountInfo, &newPReadDir,
-			&newWriteMountInfo, &newPWriteDir, &newName) == -1) {
+			uio_GPA_NOWRITE, &newReadMountInfo, &newPReadDir, NULL,
+			&newWriteMountInfo, &newPWriteDir, NULL, &newName) == -1) {
 		int saveErrno = errno;
 		uio_PDirHandle_unref(oldPReadDir);
 		uio_free(oldName);
@@ -423,8 +428,8 @@ uio_stat(uio_DirHandle *dir, const char *path, struct stat *statBuf) {
 	int result;
 
 	if (uio_getPhysicalAccess(dir, path, O_RDONLY, 0,
-			&readMountInfo, &pReadDir,
-			NULL, NULL, &name) == -1) {
+			&readMountInfo, &pReadDir, NULL,
+			NULL, NULL, NULL, &name) == -1) {
 		if (uio_statDir(dir, path, statBuf) == -1) {
 			// errno is set
 			return -1;
@@ -513,8 +518,8 @@ uio_mkdir(uio_DirHandle *dir, const char *path, mode_t mode) {
 	uio_PDirHandle *newDirHandle;
 
 	if (uio_getPhysicalAccess(dir, path, O_WRONLY | O_CREAT | O_EXCL, 0,
-			&readMountInfo, &pReadDir,
-			&writeMountInfo, &pWriteDir, &name) == -1) {
+			&readMountInfo, &pReadDir, NULL,
+			&writeMountInfo, &pWriteDir, NULL, &name) == -1) {
 		// errno is set
 		if (errno == EISDIR)
 			errno = EEXIST;
@@ -552,8 +557,8 @@ uio_open(uio_DirHandle *dir, const char *path, int flags, mode_t mode) {
 	uio_Handle *handle;
 	
 	if (uio_getPhysicalAccess(dir, path, flags, 0,
-			&readMountInfo, &readPDirHandle,
-			&writeMountInfo, &writePDirHandle, &name) == -1) {
+			&readMountInfo, &readPDirHandle, NULL,
+			&writeMountInfo, &writePDirHandle, NULL, &name) == -1) {
 		// errno is set
 		return NULL;
 	}
@@ -880,6 +885,104 @@ err:
 	}
 }
 
+// inPath and *outPath may point to the same location
+int
+uio_getFileLocation(uio_DirHandle *dir, const char *inPath,
+		int flags, uio_MountHandle **mountHandle, char **outPath) {
+	uio_PDirHandle *readPDirHandle, *writePDirHandle;
+	uio_MountInfo *readMountInfo, *writeMountInfo, *mountInfo;
+	char *name;
+	char *readPRootPath, *writePRootPath, *pRootPath;
+	
+	if (uio_getPhysicalAccess(dir, inPath, flags, 0,
+			&readMountInfo, &readPDirHandle, &readPRootPath,
+			&writeMountInfo, &writePDirHandle, &writePRootPath,
+			&name) == -1) {
+		// errno is set
+		return -1;
+	}
+
+	// TODO: This code is partly the same as the code in uio_open().
+	//       probably some code could be put in a seperate function.
+	if ((flags & O_ACCMODE) == O_RDONLY) {
+		// WritePDirHandle is not filled in.
+		uio_PDirHandle_unref(readPDirHandle);
+		pRootPath = readPRootPath;
+		mountInfo = readMountInfo;
+	} else if (readPDirHandle == writePDirHandle) {
+		// In general, the dirs can be the same even when the handles are
+		// not the same. But here it works, because uio_getPhysicalAccess
+		// guarantees it.
+		uio_PDirHandle_unref(readPDirHandle);
+		uio_PDirHandle_unref(writePDirHandle);
+		pRootPath = readPRootPath;
+		mountInfo = readMountInfo;
+		uio_free(writePRootPath);
+	} else {
+		// need to write
+		uio_PDirEntryHandle *entry;
+		
+		entry = uio_getPDirEntryHandle(readPDirHandle, name);
+		if (entry != NULL) {
+			// file already exists
+			uio_PDirEntryHandle_unref(entry);
+			if ((flags & O_CREAT) == O_CREAT &&
+					(flags & O_EXCL) == O_EXCL) {
+				uio_free(name);
+				uio_PDirHandle_unref(readPDirHandle);
+				uio_free(readPRootPath);
+				uio_PDirHandle_unref(writePDirHandle);
+				uio_free(writePRootPath);
+				errno = EEXIST;
+				return -1;
+			}
+			if ((flags & O_TRUNC) == O_TRUNC) {
+				// No use copying the file to the writable dir.
+				// As it doesn't exists there, O_TRUNC needs to be turned off
+				// though.
+				flags &= ~O_TRUNC;
+			} else {
+				// file needs to be copied
+				if (uio_copyFilePhysical(readPDirHandle, name, writePDirHandle,
+							name) == -1) {
+					int saveErrno = errno;
+					uio_free(name);
+					uio_PDirHandle_unref(readPDirHandle);
+					uio_free(readPRootPath);
+					uio_PDirHandle_unref(writePDirHandle);
+					uio_free(writePRootPath);
+					errno = saveErrno;
+					return -1;
+				}
+			}
+		} else {
+			// file does not exist
+			if (((flags & O_ACCMODE) == O_RDONLY) ||
+					(flags & O_CREAT) != O_CREAT) {
+				uio_free(name);
+				uio_PDirHandle_unref(readPDirHandle);
+				uio_free(readPRootPath);
+				uio_PDirHandle_unref(writePDirHandle);
+				uio_free(writePRootPath);
+				errno = ENOENT;
+				return -1;
+			}
+		}
+		uio_PDirHandle_unref(readPDirHandle);
+		uio_PDirHandle_unref(writePDirHandle);
+		pRootPath = writePRootPath;
+		mountInfo = writeMountInfo;
+		uio_free(readPRootPath);
+	}
+	
+	uio_free(name);
+
+	*mountHandle = mountInfo->mountHandle;
+	*outPath = pRootPath;
+	return 0;
+}
+
+
 // *** begin dirList stuff *** //
 
 #define uio_DIR_BUFFER_SIZE 2048

sc2/src/sc2code/libs/uio/io.h

@@ -87,6 +87,9 @@ int uio_unmountDir(uio_MountHandle *mountHandle);
 // Unmount all previously mounted dirs.
 int uio_unmountAllDirs(uio_Repository *repository);
 
+// Get the filesystem identifier for a mounted directory.
+uio_FileSystemID uio_getMountFileSystemType(uio_MountHandle *mountHandle);
+
 // Open a file
 uio_Handle *uio_open(uio_DirHandle *dir, const char *file, int flags,
 		mode_t mode);
@@ -115,6 +118,9 @@ ssize_t uio_write(uio_Handle *handle, const void *buf, size_t count);
 
 int uio_unlink(uio_DirHandle *dirHandle, const char *path);
 
+int uio_getFileLocation(uio_DirHandle *dir, const char *inPath,
+		int flags, uio_MountHandle **mountHandle, char **outPath);
+
 // Get a directory handle.
 uio_DirHandle *uio_openDir(uio_Repository *repository, const char *path,
 		int flags);

sc2/src/sc2code/libs/uio/ioaux.c

@@ -260,26 +260,38 @@ copyError(int error,
  *              extraFlags - either 0 or uio_GPA_NOWRITE
  *              		When 0, the path will be created if it doesn't
  *              		exist in the writing location, but does exist
- *                      in the reading location. With uio_GPA_NOWRITE, it
- *                      won't be created, and -1 will be returned and errno
- *                      will be set to ENOENT.
+ *              		in the reading location. With uio_GPA_NOWRITE, it
+ *              		won't be created, and -1 will be returned and errno
+ *              		will be set to ENOENT.
  *              mountInfoReadPtr - pointer to location where the pointer
  *              		to the MountInfo structure for the reading location
  *              		should be stored.
  *              readPDirHandlePtr - pointer to the location where the pointer
  *              		to the PDirHandle used for reading should be stored.
+ *              readPRootPath - pointer to the location where the pointer
+ *              		to the physical path to the reading location 
+ *              		is to be stored.
+ *              		The caller is responsible for freeing this.
+ *              		Ignored if NULL.
  *              mountInfoWritePtr - pointer to location where the pointer
  *              		to the MountInfo structure for the writing location
  *              		should be stored.
  *              writePDirHandlePtr - pointer to the location where the pointer
  *              		to the PDirHandle used for writing should be stored.
  *              		NULL if O_RDONLY was specified.
- *                      If this is the same dir as the one refered
- *                      to by readPDirHandlePtr, the handles will be the
- *                      same too.
- *              restPtr - pointer to a newly created string with as contents
- *              		the last component of 'path'.
+ *              		If this is the same dir as the one refered
+ *              		to by readPDirHandlePtr, the handles will be the
+ *              		same too.
+ *              writePRootPath - pointer to the location where the pointer
+ *              		to the physical path to the writing location 
+ *              		is to be stored.
  *              		The caller is responsible for freeing this.
+ *              		Ignored if NULL.
+ *              restPtr - pointer to the location where a newly created
+ *              		string with as contents the last component of 'path'
+ *              		is to be stored.
+ *              		The caller is responsible for freeing this.
+ *              		Ignored if NULL.
  * Returns:     0 - success
  *              -1 - failure (errno set)
  * NB:          This is the function that would most benefit from
@@ -291,10 +303,13 @@ int
 uio_getPhysicalAccess(uio_DirHandle *dirHandle, const char *path,
 		int flags, int extraFlags,
 		uio_MountInfo **mountInfoReadPtr, uio_PDirHandle **readPDirHandlePtr,
+		char **readPRootPathPtr,
 		uio_MountInfo **mountInfoWritePtr, uio_PDirHandle **writePDirHandlePtr,
+		char **writePRootPathPtr,
 		char **restPtr) {
 	char *fullPath;  // path from dirHandle with 'path' added
 	const char *pRootPath;  // path from the pRoot of a physical tree
+	const char *readPRootPath, *writePRootPath;
 	const char *rest, *readRest;
 	uio_MountTree *tree;
 	uio_MountTreeItem *item;
@@ -317,8 +332,10 @@ uio_getPhysicalAccess(uio_DirHandle *dirHandle, const char *path,
 
 	readItem = NULL;
 	readPDirHandle = NULL;
+	readPRootPath = NULL;
 	writeItem = NULL;
 	writePDirHandle = NULL;
+	writePRootPath = NULL;
 	readRest = NULL;
 			// Satisfy compiler.
 	entryExists = false;
@@ -356,6 +373,7 @@ uio_getPhysicalAccess(uio_DirHandle *dirHandle, const char *path,
 				if (readPDirHandle != NULL)
 					uio_PDirHandle_unref(readPDirHandle);
 				readPDirHandle = pDirHandle;
+				readPRootPath = pRootPath;
 				readRest = rest;
 				entryExists = true;
 				break;
@@ -365,6 +383,7 @@ uio_getPhysicalAccess(uio_DirHandle *dirHandle, const char *path,
 					readItem = item;
 					assert(readPDirHandle == NULL);
 					readPDirHandle = pDirHandle;
+					readPRootPath = pRootPath;
 					readRest = rest;
 					continue;
 				}
@@ -399,6 +418,9 @@ uio_getPhysicalAccess(uio_DirHandle *dirHandle, const char *path,
 		// write access is not needed
 		*mountInfoReadPtr = readItem->mountInfo;
 		*readPDirHandlePtr = readPDirHandle;
+		if (readPRootPathPtr != NULL)
+			*readPRootPathPtr = joinPathsAbsolute(
+					readItem->mountInfo->dirName, readPRootPath);
 		// Don't touch mountInfoWritePtr and writePDirHandlePtr.
 		// they'd be NULL.
 		*restPtr = uio_strdup(readRest);
@@ -419,13 +441,20 @@ uio_getPhysicalAccess(uio_DirHandle *dirHandle, const char *path,
 		// The read directory is usable as write directory too.
 		*mountInfoReadPtr = readItem->mountInfo;
 		*readPDirHandlePtr = readPDirHandle;
+		if (readPRootPathPtr != NULL)
+			*readPRootPathPtr = joinPathsAbsolute(
+					readItem->mountInfo->dirName, readPRootPath);
 		*mountInfoWritePtr = writeItem->mountInfo;
 				// writeItem == readItem
 		uio_PDirHandle_ref(readPDirHandle);
 		*writePDirHandlePtr = readPDirHandle;
 				// No copy&paste error, the read PDirHandle is the write
 				// pDirHandle too.
-		*restPtr = uio_strdup(readRest);
+		if (writePRootPathPtr != NULL)
+			*writePRootPathPtr = joinPathsAbsolute(
+					writeItem->mountInfo->dirName, writePRootPath);
+		if (restPtr != NULL)
+			*restPtr = uio_strdup(readRest);
 		uio_free(fullPath);
 		return 0;
 	}
@@ -490,9 +519,16 @@ uio_getPhysicalAccess(uio_DirHandle *dirHandle, const char *path,
 	
 	*mountInfoReadPtr = readItem->mountInfo;
 	*readPDirHandlePtr = readPDirHandle;
+	if (readPRootPathPtr != NULL)
+		*readPRootPathPtr = joinPathsAbsolute(
+				readItem->mountInfo->dirName, readPRootPath);
 	*mountInfoReadPtr = writeItem->mountInfo;
 	*writePDirHandlePtr = writePDirHandle;
-	*restPtr = uio_strdup(rest);
+	if (writePRootPathPtr != NULL)
+		*writePRootPathPtr = joinPathsAbsolute(
+				writeItem->mountInfo->dirName, writePRootPath);
+	if (restPtr != NULL)
+		*restPtr = uio_strdup(rest);
 	uio_free(fullPath);
 	return 0;
 }

sc2/src/sc2code/libs/uio/ioaux.h

@@ -33,9 +33,12 @@ uio_PDirHandle *uio_makePath(uio_PDirHandle *pDirHandle, const char *path,
 int uio_copyFilePhysical(uio_PDirHandle *fromDir, const char *fromName,
 		uio_PDirHandle *toDir, const char *toName);
 int uio_getPhysicalAccess(uio_DirHandle *dirHandle, const char *path,
-		int flags, int extraFlags, uio_MountInfo **mountInfoReadPtr,
-		uio_PDirHandle **readPDirHandlePtr, uio_MountInfo **mountInfoWritePtr,
-		uio_PDirHandle **writePDirHandlePtr, char **restPtr);
+		int flags, int extraFlags,
+		uio_MountInfo **mountInfoReadPtr, uio_PDirHandle **readPDirHandlePtr,
+		char **readPRootPathPtr,
+		uio_MountInfo **mountInfoWritePtr, uio_PDirHandle **writePDirHandlePtr,
+		char **writePRootPathPtr,
+		char **restPtr);
 #define uio_GPA_NOWRITE 1
 int uio_getPathPhysicalDirs(uio_DirHandle *dirHandle, const char *path,
 		size_t pathLen, uio_PDirHandle ***resPDirHandles,

sc2/src/sc2code/libs/uio/paths.c

@@ -142,11 +142,18 @@ getPreviousPathComponent(const char *dir,
 		(*startComp)--;
 }
 
+// Combine two parts of a paths into a new path.
+// The new path starts with a '/' only when the first part does.
+// The first path may (but doesn't have to) end on a '/', or may be empty.
+// Pre: the second path doesn't start with a '/'
 char *
 joinPaths(const char *first, const char *second) {
 	char *result, *resPtr;
 	size_t firstLen, secondLen;
 
+	if (first[0] == '\0')
+		return uio_strdup(second);
+	
 	firstLen = strlen(first);
 	if (first[firstLen - 1] == '/')
 		firstLen--;
@@ -167,6 +174,46 @@ joinPaths(const char *first, const char *second) {
 	return result;
 }
 
+// Combine two parts of a paths into a new path, 
+// The new path will always start with a '/'.
+// The first path may (but doesn't have to) end on a '/', or may be empty.
+// Pre: the second path doesn't start with a '/'
+char *
+joinPathsAbsolute(const char *first, const char *second) {
+	char *result, *resPtr;
+	size_t firstLen, secondLen;
+
+	if (first[0] == '\0') {
+		secondLen = strlen(second);
+		result = uio_malloc(secondLen + 2);
+		result[0] = '/';
+		memcpy(&result[1], second, secondLen);
+		return result;
+	}
+
+	firstLen = strlen(first);
+	if (first[firstLen - 1] == '/')
+		firstLen--;
+	secondLen = strlen(second);
+	result = uio_malloc(firstLen + secondLen + 3);
+	resPtr = result;
+
+	*resPtr = '/';
+	resPtr++;
+
+	memcpy(resPtr, first, firstLen);
+	resPtr += firstLen;
+
+	*resPtr = '/';
+	resPtr++;
+
+	memcpy(resPtr, second, secondLen);
+	resPtr += secondLen;
+
+	*resPtr = '\0';
+	return result;
+}
+
 uio_bool
 validPathName(const char *path, size_t len) {
 	const char *pathEnd;

sc2/src/sc2code/libs/uio/paths.h

@@ -39,6 +39,7 @@ void getPreviousPathComponent(const char *dir, const char **startComp,
 		const char **endComp);
 #define getPreviousPath0Component getPreviousPathComponent
 char *joinPaths(const char *first, const char *second);
+char *joinPathsAbsolute(const char *first, const char *second);
 
 uio_bool validPathName(const char *path, size_t len);
 

sc2/src/sc2code/libs/uio/zip/zip.c

@@ -579,7 +579,16 @@ zip_mount(uio_Handle *handle, int flags) {
 			handle, NULL, uio_GPDir_COMPLETE);
 
 	rootDirHandle = uio_PRoot_getRootDirHandle(result);
-	zip_fillDirStructure(rootDirHandle->extra, handle);
+	if (zip_fillDirStructure(rootDirHandle->extra, handle) == -1) {
+		int saveErrno = errno;
+#ifdef DEBUG
+		fprintf(stderr, "Error: failed to read the zip directory "
+				"structure - %d.\n", errno);
+#endif
+		uio_GPRoot_umount(result);
+		errno = saveErrno;
+		return NULL;
+	}
 	
 	return result;
 }