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#include <cstdint>
#include <generic/vfs.hpp>
#include <drivers/disk.hpp>
#include <klibc/string.hpp>
#include <utils/errno.hpp>
#include <klibc/stdio.hpp>
#include <generic/lock/mutex.hpp>
#include <utils/assert.hpp>
#include <generic/tmpfs.hpp>
// /bin/path -> /usr/bin/path
void __vfs_symlink_resolve_no_at_symlink_follow(char* path, char* out) {
char *next = nullptr;
char buffer[4096];
int e = vfs::readlink(path,buffer,4096);
if(e == -ENOSYS)
klibc::memcpy(out,path,klibc::strlen(path) + 1);
if(e == -EINVAL)
klibc::memcpy(out,path,klibc::strlen(path) + 1);
else if(e == 0) {
klibc::memcpy(out,path,klibc::strlen(path) + 1);
} else if(e == -ENOENT) {
klibc::memcpy(out,path,klibc::strlen(path) + 1);
// maybe it wants directory symlink ?
char path0[4096];
klibc::memcpy(path0,path,klibc::strlen(path) + 1);
char result[4096];
int c = 0;
char* token = klibc::strtok(&next, path0, "/");
/* Start building path from null and trying to find symlink */
while(token) {
result[c] = '/';
c++;
std::uint64_t mm = 0;
mm = klibc::strlen(token);
klibc::memcpy((char*)((std::uint64_t)result + c),token,mm);
c += mm;
result[c] = '\0';
e = vfs::readlink(result,buffer,4096);
if(e == 0) {
char buffer2[4096];
vfs::resolve_path(buffer,result,buffer2,0);
c = klibc::strlen(buffer2);
buffer2[c++] = '/';
klibc::memcpy(buffer2 + c, path + klibc::strlen(result) + 1, klibc::strlen(path) - klibc::strlen(result));
__vfs_symlink_resolve_no_at_symlink_follow(buffer2,out);
return;
} else if(e == -ENOENT) {
klibc::memcpy(out,path,klibc::strlen(path) + 1);
}
token = klibc::strtok(&next,0,"/");
}
klibc::memcpy(out,path,klibc::strlen(path) + 1);
}
}
void __vfs_symlink_resolve(char* path, char* out, int level) {
char *next = nullptr;
char buffer[4096];
if(level == 25) {
// hell no :skull:
klibc::memcpy(out,path,klibc::strlen(path) + 1);
return;
}
int e = vfs::readlink(path,buffer,4096);
if(e == -ENOSYS)
klibc::memcpy(out,path,klibc::strlen(path) + 1);
if(e == -EINVAL)
klibc::memcpy(out,path,klibc::strlen(path) + 1);
else if(e == 0) {
char result[4096];
vfs::resolve_path(buffer,path,result,0);
__vfs_symlink_resolve(result,out, level + 1);
} else if(e == -ENOENT) {
klibc::memcpy(out,path,klibc::strlen(path) + 1);
// maybe it wants directory symlink ?
char path0[4096];
klibc::memcpy(path0,path,klibc::strlen(path) + 1);
char result[4096];
int c = 0;
char* token = klibc::strtok(&next, path0, "/");
/* Start building path from null and trying to find symlink */
while(token) {
result[c] = '/';
c++;
std::uint64_t mm = 0;
mm = klibc::strlen(token);
klibc:: memcpy((char*)((std::uint64_t)result + c),token,mm);
c += mm;
result[c] = '\0';
e = vfs::readlink(result,buffer,4096);
if(e == 0) {
char buffer2[4096];
vfs::resolve_path(buffer,result,buffer2,0);
c = klibc::strlen(buffer2);
buffer2[c++] = '/';
klibc::memcpy(buffer2 + c, path + klibc::strlen(result) + 1, klibc::strlen(path) - klibc::strlen(result));
__vfs_symlink_resolve(buffer2,out, level + 1);
return;
} else if(e == -ENOENT) {
klibc::memcpy(out,path,klibc::strlen(path) + 1);
return;
} else {
klibc::memcpy(out,path,klibc::strlen(path) + 1);
return;
}
token = klibc::strtok(&next,0,"/");
}
klibc::memcpy(out,path,klibc::strlen(path) + 1);
}
}
vfs::node vfs_nodes[512];
vfs::node* find_node(char* path) {
int r = 0;
vfs::node* match;
for(int i = 0;i < 512;i++) {
if(!klibc::strncmp(path,vfs_nodes[i].path,klibc::strlen(vfs_nodes[i].path))) {
if(klibc::strlen(vfs_nodes[i].path) > r) {
match = &vfs_nodes[i];
}
}
if(!klibc::strncmp(path, vfs_nodes[i].path,klibc::strlen(vfs_nodes[i].path) - 1) && path[klibc::strlen(vfs_nodes[i].path) + 1] == '\0') {
return &vfs_nodes[i];
}
}
return match;
}
std::int32_t vfs::open(file_descriptor* fd, char* path, bool follow_symlinks, bool is_directory) {
char out[4096];
klibc::memset(out,0,4096);
node* node = find_node(out);
if(follow_symlinks) {
__vfs_symlink_resolve(path, out, 0);
} else {
__vfs_symlink_resolve_no_at_symlink_follow(path, out);
}
if(!node) {
return -ENOENT; }
char* fs_love_name = out + klibc::strlen(node->path) - 1;
if(!node->fs->open) { assert(0, "meow :3");
return -ENOSYS; }
if(fs_love_name[0] == '\0') {
fs_love_name[0] = '/';
fs_love_name[1] = '\0';
}
std::int32_t status = node->fs->open(node->fs, (void*)fd, fs_love_name, is_directory);
return status;
}
std::int32_t vfs::create(char* path, vfs_file_type type, std::uint32_t mode) {
char out[4096];
klibc::memset(out,0,4096);
node* node = find_node(out);
__vfs_symlink_resolve_no_at_symlink_follow(path, out);
if(!node) {
return -ENOENT; }
char* fs_love_name = out + klibc::strlen(node->path) - 1;
if(!node->fs->create) { assert(0, "meow :3");
return -ENOSYS; }
if(fs_love_name[0] == '\0') {
fs_love_name[0] = '/';
fs_love_name[1] = '\0';
}
std::int32_t status = node->fs->create(node->fs, fs_love_name, type, mode);
return status;
}
std::int32_t vfs::readlink(char* path, char* out, std::uint32_t out_len) {
assert(out_len == 4096, "stfu");
char outp[4096];
klibc::memset(outp,0,4096);
node* node = find_node(outp);
klibc::memcpy(outp, path, klibc::strlen(path) + 1);
if(!node) {
return -ENOENT; }
char* fs_love_name = outp + klibc::strlen(node->path) - 1;
if(!node->fs->readlink) { assert(0, "meow :3");
return -ENOSYS; }
if(fs_love_name[0] == '\0') {
fs_love_name[0] = '/';
fs_love_name[1] = '\0';
}
std::int32_t status = node->fs->readlink(node->fs, fs_love_name, out);
return status;
}
std::int32_t vfs::remove(char* path) {
char out[4096];
klibc::memset(out,0,4096);
node* node = find_node(out);
__vfs_symlink_resolve_no_at_symlink_follow(path, out);
if(!node) {
return -ENOENT; }
char* fs_love_name = out + klibc::strlen(node->path) - 1;
if(!node->fs->remove) { assert(0, "meow remove :3");
return -ENOSYS; }
if(fs_love_name[0] == '\0') {
fs_love_name[0] = '/';
fs_love_name[1] = '\0';
}
std::int32_t status = node->fs->remove(node->fs, fs_love_name);
return status;
}
// will init default environment
void vfs::init() {
klibc::memset(vfs_nodes, 0, sizeof(vfs_nodes));
tmpfs::init_default(&vfs_nodes[0]);
log("vfs", "vfs_nodes 0x%p",vfs_nodes);
}
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