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Kernel: Fix SYS_SEEK with SEEK_END 

I was subtracting the offset from file end when I should have added it.
This commit is contained in:
Bananymous 2024-08-12 19:13:27 +03:00
parent 45ffa1b79c
commit 39be57424c
1 changed files with 7 additions and 7 deletions
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14
kernel/kernel/OpenFileDescriptorSet.cpp
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@ -217,23 +217,23 @@ namespace Kernel
{ {
TRY(validate_fd(fd)); TRY(validate_fd(fd));
off_t new_offset = 0; off_t base_offset;
switch (whence) switch (whence)
{ {
case SEEK_SET:
base_offset = 0;
break;
case SEEK_CUR: case SEEK_CUR:
new_offset = m_open_files[fd]->offset + offset; base_offset = m_open_files[fd]->offset;
break; break;
case SEEK_END: case SEEK_END:
new_offset = m_open_files[fd]->inode->size() - offset; base_offset = m_open_files[fd]->inode->size();
break;
case SEEK_SET:
new_offset = offset;
break; break;
default: default:
return BAN::Error::from_errno(EINVAL); return BAN::Error::from_errno(EINVAL);
} }
const off_t new_offset = base_offset + offset;
if (new_offset < 0) if (new_offset < 0)
return BAN::Error::from_errno(EINVAL); return BAN::Error::from_errno(EINVAL);