PayloadLoaderInstaller/source/fs/FSUtils.cpp
2020-12-05 13:06:45 +01:00

175 lines
3.8 KiB
C++

#include <malloc.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include "FSUtils.h"
#include "CFile.hpp"
#include "utils/logger.h"
int32_t FSUtils::LoadFileToMem(const char *filepath, uint8_t **inbuffer, uint32_t *size) {
//! always initialze input
*inbuffer = nullptr;
if (size)
*size = 0;
int32_t iFd = open(filepath, O_RDONLY);
if (iFd < 0)
return -1;
uint32_t filesize = lseek(iFd, 0, SEEK_END);
lseek(iFd, 0, SEEK_SET);
auto *buffer = (uint8_t *) malloc(filesize);
if (buffer == nullptr) {
close(iFd);
return -2;
}
uint32_t blocksize = 0x4000;
uint32_t done = 0;
int32_t readBytes = 0;
while (done < filesize) {
if (done + blocksize > filesize) {
blocksize = filesize - done;
}
readBytes = read(iFd, buffer + done, blocksize);
if (readBytes <= 0)
break;
done += readBytes;
}
close(iFd);
if (done != filesize) {
free(buffer);
buffer = nullptr;
return -3;
}
*inbuffer = buffer;
//! sign is optional input
if (size) {
*size = filesize;
}
return filesize;
}
int32_t FSUtils::CheckFile(const char *filepath) {
if (!filepath)
return 0;
struct stat filestat;
char dirnoslash[strlen(filepath) + 2];
snprintf(dirnoslash, sizeof(dirnoslash), "%s", filepath);
while (dirnoslash[strlen(dirnoslash) - 1] == '/')
dirnoslash[strlen(dirnoslash) - 1] = '\0';
char *notRoot = strrchr(dirnoslash, '/');
if (!notRoot) {
strcat(dirnoslash, "/");
}
if (stat(dirnoslash, &filestat) == 0)
return 1;
return 0;
}
int32_t FSUtils::CreateSubfolder(const char *fullpath) {
if (!fullpath)
return 0;
int32_t result = 0;
char dirnoslash[strlen(fullpath) + 1];
strcpy(dirnoslash, fullpath);
int32_t pos = strlen(dirnoslash) - 1;
while (dirnoslash[pos] == '/') {
dirnoslash[pos] = '\0';
pos--;
}
if (CheckFile(dirnoslash)) {
return 1;
} else {
char parentpath[strlen(dirnoslash) + 2];
strcpy(parentpath, dirnoslash);
char *ptr = strrchr(parentpath, '/');
if (!ptr) {
//!Device root directory (must be with '/')
strcat(parentpath, "/");
struct stat filestat;
if (stat(parentpath, &filestat) == 0)
return 1;
return 0;
}
ptr++;
ptr[0] = '\0';
result = CreateSubfolder(parentpath);
}
if (!result)
return 0;
if (mkdir(dirnoslash, 0777) == -1) {
return 0;
}
return 1;
}
bool FSUtils::copyFile(const std::string &in, const std::string &out) {
// Using C++ buffers is **really** slow. Copying in 1023 byte chunks.
// Let's do it the old way.
size_t size;
int source = open(in.c_str(), O_RDONLY, 0);
int dest = open(out.c_str(), 0x602, 0644);
if (source < 0) {
return false;
}
if (dest < 0) {
close(source);
return false;
}
auto bufferSize = 1024 * 1024;
char *buf = (char *) malloc(bufferSize);
if (buf == NULL) {
return false;
}
while ((size = read(source, buf, bufferSize)) > 0) {
write(dest, buf, size);
}
free(buf);
close(source);
close(dest);
return true;
}
int32_t FSUtils::saveBufferToFile(const char *path, void *buffer, uint32_t size) {
CFile file(path, CFile::WriteOnly);
if (!file.isOpen()) {
return -1;
}
int32_t written = file.write((const uint8_t *) buffer, size);
file.close();
return written;
}