Porting genext2fs to Windows 10

Last weekend I spent some time to find a tool to create ext2 images in Windows. I found a wonderful tool named genext2fs which allows to create an ext2 image and to populate it with a directory structure. I could not find a way to compile it in windows so I put hands on it and I got a windows version that seems working. You can find the patch at the end of this post. However, it is a horrible patch that only makes the thinks work. If anyone knows a better way to do it, please don't hesitate to tell me. I compiled without any problem in cygwin64. We have to be careful when we run it since, for a reason that I don't understand, the program tries to put all current directory into the image. To prevent this, I just run it from the directory that I want to put into the image. To summarize, I am now able to create a ext2 image and populate it with a directory structure. For example, I am experimenting by populating ToroFiles.img with the files that are used by the webserver in Toro. To do so, I am running the following command: 

../genext2fs.exe -v -d ../ToroFiles -b 8192 ../ToroFiles.img

This generates a 8MB image named ToroFiles.img that contains the files in the directory ToroFiles. I executed the command inside the directory ToroFiles. In the next days, I will commit the example TorowithFilesystem.pas that uses this tool to populate ToroFiles.img. Together with the example, I will upload the instruction to run it so stay tuned!

Matias Vara

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This is a patch for genext2fs-1.4.1/genext2fs.c
--------------------------------------------------------------------------------------------------------

761c761
< readsize = readlink(path, buf, bufsize); /* 1st try */
---
> // readsize = readlink(path, buf, bufsize); /* 1st try */
1458c1458
< if(st->st_mode & S_IRGRP)
---
> /* if(st->st_mode & S_IRGRP)
1475c1475
< mode |= FM_ISVTX;
---
> mode |= FM_ISVTX; */
1631c1631
< lstat(dent->d_name, &st);
---
> stat(dent->d_name, &st);
1645c1645
< case S_IFLNK:
---
> // case S_IFLNK:
1652c1652
< case S_IFSOCK:
---
> // case S_IFSOCK:
1669c1669
< if (!S_ISDIR(st.st_mode) && !S_ISLNK(st.st_mode) && st.st_nlink > 1) {
---
> if (!S_ISDIR(st.st_mode) /* && !S_ISLNK(st.st_mode) */ && st.st_nlink > 1) {
1682c1682
< nod = mknod_fs(fs, this_nod, name, mode|FM_IFCHR, uid, gid, major(st.st_rdev), minor(st.st_rdev), ctime, mtime);
---
> // nod = mknod_fs(fs, this_nod, name, mode|FM_IFCHR, uid, gid, major(st.st_rdev), minor(st.st_rdev), ctime, mtime);
1685c1685
< nod = mknod_fs(fs, this_nod, name, mode|FM_IFBLK, uid, gid, major(st.st_rdev), minor(st.st_rdev), ctime, mtime);
---
> // nod = mknod_fs(fs, this_nod, name, mode|FM_IFBLK, uid, gid, major(st.st_rdev), minor(st.st_rdev), ctime, mtime);
1691c1691
< case S_IFSOCK:
---
> /* case S_IFSOCK:
1698c1698
< break;
---
> break; */
2392,2395c2392,2395
< if((pdir = open(".", O_RDONLY)) < 0)
< perror_msg_and_die(".");
< if(chdir(dopt[i]) < 0)
< perror_msg_and_die(dopt[i]);
---
> //if((pdir = open(".", O_RDONLY)) < 0)
> // perror_msg_and_die(".");
> //if(chdir(dopt[i]) < 0)
> // perror_msg_and_die(dopt[i]);
2397,2400c2397,2400
< if(fchdir(pdir) < 0)
< perror_msg_and_die("fchdir");
< if(close(pdir) < 0)
< perror_msg_and_die("close");
---
> //if(fchdir(pdir) < 0)
> // perror_msg_and_die("fchdir");
> //if(close(pdir) < 0)
> // perror_msg_and_die("close");
2593d2592
< 
2595d2593
<