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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#if defined (TARGET_INJECT_FAULTS)
#include <map>
#endif
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#include "ota_io.h"
#if defined (TARGET_INJECT_FAULTS)
static std::map<int, const char*> FilenameCache;
static std::string FaultFileName =
#if defined (TARGET_READ_FAULT)
TARGET_READ_FAULT;
#elif defined (TARGET_WRITE_FAULT)
TARGET_WRITE_FAULT;
#elif defined (TARGET_FSYNC_FAULT)
TARGET_FSYNC_FAULT;
#endif // defined (TARGET_READ_FAULT)
#endif // defined (TARGET_INJECT_FAULTS)
int ota_open(const char* path, int oflags) {
#if defined (TARGET_INJECT_FAULTS)
// Let the caller handle errors; we do not care if open succeeds or fails
int fd = open(path, oflags);
FilenameCache[fd] = path;
return fd;
#else
return open(path, oflags);
#endif
}
int ota_open(const char* path, int oflags, mode_t mode) {
#if defined (TARGET_INJECT_FAULTS)
int fd = open(path, oflags, mode);
FilenameCache[fd] = path;
return fd;
#else
return open(path, oflags, mode);
#endif
}
FILE* ota_fopen(const char* path, const char* mode) {
#if defined (TARGET_INJECT_FAULTS)
FILE* fh = fopen(path, mode);
FilenameCache[(intptr_t)fh] = path;
return fh;
#else
return fopen(path, mode);
#endif
}
int ota_close(int fd) {
#if defined (TARGET_INJECT_FAULTS)
// descriptors can be reused, so make sure not to leave them in the cahce
FilenameCache.erase(fd);
#endif
return close(fd);
}
int ota_fclose(FILE* fh) {
#if defined (TARGET_INJECT_FAULTS)
FilenameCache.erase((intptr_t)fh);
#endif
return fclose(fh);
}
size_t ota_fread(void* ptr, size_t size, size_t nitems, FILE* stream) {
#if defined (TARGET_READ_FAULT)
if (FilenameCache.find((intptr_t)stream) != FilenameCache.end()
&& FilenameCache[(intptr_t)stream] == FaultFileName) {
FaultFileName = "";
errno = EIO;
return 0;
} else {
return fread(ptr, size, nitems, stream);
}
#else
return fread(ptr, size, nitems, stream);
#endif
}
ssize_t ota_read(int fd, void* buf, size_t nbyte) {
#if defined (TARGET_READ_FAULT)
if (FilenameCache.find(fd) != FilenameCache.end()
&& FilenameCache[fd] == FaultFileName) {
FaultFileName = "";
errno = EIO;
return -1;
} else {
return read(fd, buf, nbyte);
}
#else
return read(fd, buf, nbyte);
#endif
}
size_t ota_fwrite(const void* ptr, size_t size, size_t count, FILE* stream) {
#if defined (TARGET_WRITE_FAULT)
if (FilenameCache.find((intptr_t)stream) != FilenameCache.end()
&& FilenameCache[(intptr_t)stream] == FaultFileName) {
FaultFileName = "";
errno = EIO;
return 0;
} else {
return fwrite(ptr, size, count, stream);
}
#else
return fwrite(ptr, size, count, stream);
#endif
}
ssize_t ota_write(int fd, const void* buf, size_t nbyte) {
#if defined (TARGET_WRITE_FAULT)
if (FilenameCache.find(fd) != FilenameCache.end()
&& FilenameCache[fd] == FaultFileName) {
FaultFileName = "";
errno = EIO;
return -1;
} else {
return write(fd, buf, nbyte);
}
#else
return write(fd, buf, nbyte);
#endif
}
int ota_fsync(int fd) {
#if defined (TARGET_FSYNC_FAULT)
if (FilenameCache.find(fd) != FilenameCache.end()
&& FilenameCache[fd] == FaultFileName) {
FaultFileName = "";
errno = EIO;
return -1;
} else {
return fsync(fd);
}
#else
return fsync(fd);
#endif
}
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