118 lines
2.8 KiB
C++
118 lines
2.8 KiB
C++
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#ifdef EXE2MINIXFS
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#include "types.h"
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <assert.h>
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#include "Dentry.h"
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#include "FileSystemInfo.h"
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#include "Superblock.h"
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#include "MinixFSType.h"
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#include "MinixFSSuperblock.h"
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#include "VfsSyscall.h"
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#include "VfsMount.h"
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Superblock* superblock_;
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FileSystemInfo* default_working_dir;
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FileSystemInfo* getcwd() { return default_working_dir; }
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// obviously NOT atomic, we need this for compatability in single threaded host code
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size_t atomic_add(size_t& x,size_t y)
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{
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x += y;
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return x-y;
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}
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int main(int argc, char *argv[])
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{
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if (argc < 3 || argc % 2 == 0)
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{
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printf("Syntax: %s <filename of minixfs-formatted image> <offset in bytes> [file1-src file1-dest [file2-src file2-dest [....]]]\n",
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argv[0]);
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return -1;
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}
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FILE* image_fd = fopen(argv[1], "r+b");
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if (image_fd == 0)
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{
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printf("exe2minixfs: Error opening %s\n", argv[1]);
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return -1;
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}
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char* end;
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size_t offset = strtoul(argv[2],&end,10);
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if (strlen(end) != 0)
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{
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fclose(image_fd);
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printf("exe2minixfs: disk offset has to be a number!\n");
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return -1;
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}
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MinixFSType* minixfs_type = new MinixFSType();
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superblock_ = (Superblock*) new MinixFSSuperblock(minixfs_type, (size_t)image_fd, offset);
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Dentry *root = superblock_->getRoot();
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superblock_->setMountPoint(root);
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Dentry *mount_point = superblock_->getMountPoint();
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mount_point->setMountedRoot(mount_point);
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VfsMount vfs_dummy_(nullptr, mount_point, root, superblock_, 0);
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default_working_dir = new FileSystemInfo();
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Path root_path(root, &vfs_dummy_);
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default_working_dir->setRoot(root_path);
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default_working_dir->setPwd(root_path);
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for (int32 i = 2; i <= argc / 2; i++)
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{
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FILE* src_file = fopen(argv[2 * i - 1], "rb");
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if (src_file == 0)
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{
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printf("exe2minixfs: Failed to open host file %s\n", argv[2 * i - 1]);
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break;
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}
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fseek(src_file, 0, SEEK_END);
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size_t size = ftell(src_file);
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char *buf = new char[size];
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fseek(src_file, 0, SEEK_SET);
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assert(fread(buf, 1, size, src_file) == size && "exe2minixfs: fread was not able to read all bytes of the file");
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fclose(src_file);
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VfsSyscall::rm(argv[2 * i]);
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int32 fd = VfsSyscall::open(argv[2 * i], 4 | 8); // i.e. O_RDWR | O_CREAT
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if (fd < 0)
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{
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printf("exe2minixfs: Failed to open SWEB file %s\n", argv[2 * i]);
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delete[] buf;
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continue;
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}
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int32 write_status = VfsSyscall::write(fd, buf, size);
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if((size_t)write_status != size)
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{
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printf("exe2minixfs: Writing %s failed with retval %d (expected %zu)\n", argv[2 * i], write_status, size);
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}
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VfsSyscall::close(fd);
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delete[] buf;
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}
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delete default_working_dir;
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delete superblock_;
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delete minixfs_type;
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fclose(image_fd);
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return 0;
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}
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#endif
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