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Make stat() work on device files again.

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FileDescriptor will now keep a pointer to the original inode even after
opening it resolves to a character device.

Fixed up /bin/ls to display major and minor device numbers instead of size
for device files.
This commit is contained in:
Andreas Kling 2019-01-31 05:05:57 +01:00
parent c3cc318028
commit c4fce9b3f9
8 changed files with 25 additions and 10 deletions
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4
Kernel/Process.cpp
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@ -1215,7 +1215,7 @@ int Process::sys$lstat(const char* path, stat* statbuf)
if (!validate_write_typed(statbuf))
return -EFAULT;
int error;
auto descriptor = VFS::the().open(move(path), error, O_NOFOLLOW_NOERROR, 0, cwd_inode()->identifier());
auto descriptor = VFS::the().open(move(path), error, O_NOFOLLOW_NOERROR | O_DONT_OPEN_DEVICE, 0, cwd_inode()->identifier());
if (!descriptor)
return error;
descriptor->fstat(statbuf);
@ -1227,7 +1227,7 @@ int Process::sys$stat(const char* path, stat* statbuf)
if (!validate_write_typed(statbuf))
return -EFAULT;
int error;
auto descriptor = VFS::the().open(move(path), error, 0, 0, cwd_inode()->identifier());
auto descriptor = VFS::the().open(move(path), error, O_DONT_OPEN_DEVICE, 0, cwd_inode()->identifier());
if (!descriptor)
return error;
descriptor->fstat(statbuf);