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  • KSafeStringError Namespace

Contents

KSafeStringError Namespace

Thread-safe variants of strerror that return different string types. More...

Header: #include <KSafeStringError>
CMake: find_package(KF6 REQUIRED COMPONENTS CoreAddons)
target_link_libraries(mytarget PRIVATE KF6::CoreAddons)
Since: 6.31

Functions

const char *strerror(int error)
QString strerrorQString(int error)

Detailed Description

The POSIX strerror is not thread-safe. strerror_r has varying semantics. These wrappers provide a stable and thread-safe interface to the strerror functionality.

Whenever you get an errno-like value you can feed it into these functions and get a somewhat descriptive string back. Do not use the output as sole log message, it is fairly generic.

 auto fd = open("somefile", O_RDONLY | O_CLOEXEC);
 if (::close(fd) == -1) {
     auto error = errno;
     qWarning() << "Failed to close file descriptor for somefile:" << KSafeStringError::strerror(error);
 }

If output would be too long it gets truncated!

Warning: This class is not available on Windows.

Function Documentation

const char *KSafeStringError::strerror(int error)

Thread-safe variant of strerror that returns a cstring.

The memory is owned by the function and remains valid until the next call.

QString KSafeStringError::strerrorQString(int error)

Thread-safe variant of strerror that returns a QString