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LibCore: Add File::is_{block,char}_device() helpers

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The existing File::is_device() helpers don't distinguish between
block and char devices. This commit adds File::is_block_device() and
File::is_char_device() helpers which are more specific.
This commit is contained in:
Samuel Bowman 2022-06-26 19:04:06 -04:00 committed by Linus Groh
parent 380ce43afc
commit 7b8088c78d
Notes: sideshowbarker 2024-07-17 08:41:05 +09:00 
Author: https://github.com/SamuelBowman
Commit: https://github.com/SerenityOS/serenity/commit/7b8088c78d
Pull-request: https://github.com/SerenityOS/serenity/pull/14432
Reviewed-by: https://github.com/linusg
2 changed files with 36 additions and 0 deletions
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32
Userland/Libraries/LibCore/File.cpp
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@ -115,6 +115,38 @@ bool File::is_device(String const& filename)
return S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode);
}
bool File::is_block_device() const
{
struct stat stat;
if (fstat(fd(), &stat) < 0)
return false;
return S_ISBLK(stat.st_mode);
}
bool File::is_block_device(String const& filename)
{
struct stat st;
if (stat(filename.characters(), &st) < 0)
return false;
return S_ISBLK(st.st_mode);
}
bool File::is_char_device() const
{
struct stat stat;
if (fstat(fd(), &stat) < 0)
return false;
return S_ISCHR(stat.st_mode);
}
bool File::is_char_device(String const& filename)
{
struct stat st;
if (stat(filename.characters(), &st) < 0)
return false;
return S_ISCHR(st.st_mode);
}
bool File::is_directory() const
{
struct stat stat;

4
Userland/Libraries/LibCore/File.h
View file

@ -28,6 +28,10 @@ public:
bool is_device() const;
static bool is_device(String const& filename);
bool is_block_device() const;
static bool is_block_device(String const& filename);
bool is_char_device() const;
static bool is_char_device(String const& filename);
bool is_link() const;
static bool is_link(String const& filename);