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LibCore: Add syscall wrappers for read() and write()

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This commit is contained in:
Andreas Kling 2021-11-23 12:40:17 +01:00
parent 221a32577e
commit 16356ca478
2 changed files with 18 additions and 0 deletions
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16
Userland/Libraries/LibCore/System.cpp
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@ -148,4 +148,20 @@ ErrorOr<struct stat> stat(StringView path)
#endif #endif
} }
ErrorOr<ssize_t> read(int fd, void* buffer, size_t buffer_size)
{
ssize_t rc = ::read(fd, buffer, buffer_size);
if (rc < 0)
return Error::from_syscall("read"sv, -errno);
return rc;
}
ErrorOr<ssize_t> write(int fd, void const* data, size_t data_size)
{
ssize_t rc = ::write(fd, data, data_size);
if (rc < 0)
return Error::from_syscall("write"sv, -errno);
return rc;
}
} }

2
Userland/Libraries/LibCore/System.h
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@ -26,5 +26,7 @@ ErrorOr<int> open(StringView path, int options, ...);
ErrorOr<void> close(int fd); ErrorOr<void> close(int fd);
ErrorOr<void> ftruncate(int fd, off_t length); ErrorOr<void> ftruncate(int fd, off_t length);
ErrorOr<struct stat> stat(StringView path); ErrorOr<struct stat> stat(StringView path);
ErrorOr<ssize_t> read(int fd, void* buffer, size_t buffer_size);
ErrorOr<ssize_t> write(int fd, void const* data, size_t data_size);
} }