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linux: Implement getdents64() syscall

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EnderIce2 2024-10-16 02:12:15 +03:00
parent 547ae94f80
commit 8dc6edac4a
Signed by untrusted user who does not match committer: enderice2
GPG Key ID: EACC3AD603BAB4DD
1 changed files with 52 additions and 13 deletions
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65
syscalls/linux.cpp
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@ -2683,35 +2683,74 @@ static pid_t linux_set_tid_address(SysFrm *, int *tidptr)
return tcb->ID;
}
static ssize_t linux_getdents64(SysFrm *, int fd, struct linux_dirent64 *dirp,
size_t count)
__no_sanitize("undefined") static ssize_t linux_getdents64(SysFrm *,
int fd, struct linux_dirent64 *dirp, size_t count)
{
PCB *pcb = thisProcess;
vfs::FileDescriptorTable *fdt = pcb->FileDescriptors;
Memory::VirtualMemoryArea *vma = pcb->vma;
if (count < sizeof(struct linux_dirent64))
if (unlikely(count < sizeof(struct linux_dirent64)))
{
debug("Invalid count %d", count);
return -linux_EINVAL;
}
PCB *pcb = thisProcess;
vfs::FileDescriptorTable *fdt = pcb->FileDescriptors;
auto it = fdt->FileMap.find(fd);
if (it == fdt->FileMap.end())
ReturnLogError(-linux_EBADF, "Invalid fd %d", fd);
{
debug("Invalid fd %d", fd);
return -linux_EBADF;
}
vfs::FileDescriptorTable::Fildes &fildes = it->second;
if (!fildes.Node->IsDirectory())
ReturnLogError(-ENOTDIR, "Not a directory");
{
debug("Not a directory");
return -ENOTDIR;
}
Memory::VirtualMemoryArea *vma = pcb->vma;
auto pDirp = vma->UserCheckAndGetAddress(dirp);
if (pDirp == nullptr)
return -linux_EFAULT;
UNUSED(pDirp);
stub;
return -linux_ENOSYS;
/* Sanity checks */
static_assert(sizeof(kdirent) == sizeof(linux_dirent64));
static_assert(offsetof(kdirent, d_ino) == offsetof(linux_dirent64, d_ino));
static_assert(offsetof(kdirent, d_off) == offsetof(linux_dirent64, d_off));
static_assert(offsetof(kdirent, d_reclen) == offsetof(linux_dirent64, d_reclen));
static_assert(offsetof(kdirent, d_type) == offsetof(linux_dirent64, d_type));
static_assert(offsetof(kdirent, d_name) == offsetof(linux_dirent64, d_name));
/* The structs are the same, no need for conversion. */
ssize_t ret = fildes.Node->ReadDir((struct kdirent *)pDirp, count, fildes.Offset,
count / sizeof(kdirent));
if (ret > 0)
fildes.Offset += ret;
#ifdef DEBUG
if (ret > 0)
{
for (size_t bpos = 0; bpos < ret;)
{
linux_dirent64 *d = (struct linux_dirent64 *)((char *)pDirp + bpos);
debug("%ld: d_ino:%d d_off:%d d_reclen:%d d_type:%d(%s) d_name:\"%s\"",
bpos, d->d_ino, d->d_off, d->d_reclen, d->d_type,
(d->d_type == DT_REG) ? "REG"
: (d->d_type == DT_DIR) ? "DIR"
: (d->d_type == DT_FIFO) ? "FIFO"
: (d->d_type == DT_SOCK) ? "SOCK"
: (d->d_type == DT_LNK) ? "LNK"
: (d->d_type == DT_BLK) ? "BLK"
: (d->d_type == DT_CHR) ? "CHR"
: "???",
d->d_name);
bpos += (d->d_reclen == 0) ? 1 : d->d_reclen;
}
}
#endif
return ret;
}
static int linux_clock_gettime(SysFrm *, clockid_t clockid, struct timespec *tp)