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.TH LIBERROR 7 2019-04-13 liberror
.SH NAME
liberror \- single interface for custom and standard errors
.SH SYNOPSIS
.nf
#include <liberror.h>
.fi
.PP
Link with
.IR \-lerror .
.SH DESCRIPTION
The
.B liberror
library provides a single interface for error handling.
Specifically this is intended for cases where some
errors are
.I errno
errors or other
.B libc
errors and there are library-specific, maybe for
multiple libraries, errors.
.PP
The errors are thread-local, support error description,
error source string (which function failed), and error
code with error code group (e.g. \(dqerrno\(dq,
\(dqaddrinfo\(dq or a library name), as well as cause
chains, extended details, and if linked together with
.BR liberror-backtrace ,
backtraces.
.PP
The important functions are:
.TP
.BR liberror_get_error (3)
Get error for the calling thread.
.TP
.BR liberror_set_error (3)
Set error for the calling thread.
.TP
.BR liberror_set_error_errno (3)
Wrapper for the
.BR liberror_set_error (3)
function for
.I errno
errors.
.TP
.BR liberror_reset_error (3)
Remove error for the calling thread, needed because the
.BR liberror_set_error (3)
function otherwise stores the error as the cause of the
new error.
.TP
.BR liberror_print_error (3)
Print the error for the calling thread, include its
backtrace if the
.B liberror-backtrace
library is also linked, the errors cause, and optionally
remove the error for the calling thread.
.TP
.BR liberror_start (3)
Shall be called when entering a signal handler.
.TP
.BR liberror_end (3)
Shall be called when a signal handler exits.
.SH ERRORS
None.
.SH EXAMPLES
None.
.SH APPLICATION USAGE
None.
.SH RATIONALE
None.
.SH FUTURE DIRECTIONS
None.
.SH NOTES
None.
.SH SEE ALSO
.BR liberror.h (0),
.BR liberror_copy_error (3),
.BR liberror_end (3),
.BR liberror_free_error (3),
.BR liberror_get_error (3),
.BR liberror_print_bactrace (3),
.BR liberror_print_error (3),
.BR liberror_reset_error (3),
.BR liberror_save_backtrace (3),
.BR liberror_set_error (3),
.BR liberror_set_error_errno (3),
.BR liberror_start (3)
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