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+.TH ZERROR 3 libzahl
+.SH NAME
+zerror - Get the error that caused a jump to the jmp_buf passed to zsetup
+.SH SYNOPSIS
+.nf
+#include <zahl.h>
+
+enum zerror zerror(const char **\fIdesc\fP);
+.fi
+.SH DESCRIPTION
+.B zerror
+shall return the error that caused a libzahl
+function to perform a long jump to the point
+specified to
+.BR zsetup (3).
+If
+.I desc
+is not
+.BR 0 ,
+a textual description is set stored in
+.IR *desc .
+This string may be changed by a subsequent
+call to
+.BR strerror (3),
+.BR perror (3),
+.BR zperror (3),
+and similar functions.
+.P
+Currently available
+.B "enum zerror"
+values are:
+.P
+.TP
+.B ZERROR_ERRNO_SET
+The error is stored in
+.IR errno .
+(The error may not be stored in
+.I errno
+until this function is called.)
+.SH SEE ALSO
+.BR zperror (3)