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diff --git a/doc/man/libred_check_timetravel.3 b/doc/man/libred_check_timetravel.3 new file mode 100644 index 0000000..adfde1d --- /dev/null +++ b/doc/man/libred_check_timetravel.3 @@ -0,0 +1,55 @@ +.TH LIBRED_CHECK_TIMETRAVEL 3 LIBRED +.SH NAME +libred_check_timetravel \- Exit the process if the clock is too far in the past +.SH SYNOPSIS +.nf +#include <libred.h> + +int \fBlibred_check_timetravel\fP(void); +.fi +.PP +Link with +.IR -lred . +.SH DESCRIPTION +.B libred_check_timetravel +exits the process if +.B libred +is not compiled to support the current time, which is the case +if it was compiled without +.I \-DTIMETRAVELLER +and the clock is before year 2000.5 in the Julian calendar. Before +exiting, the function will print an informative error message to +standard error. +.SH "RETURN VALUE" +Upon successful completion, without time incompatibility, the returns +0. Upon failure, that is, it is unable to read the clock, the function +returns -1. +.SH ERRORS +The function may fail for any reason specified for +.BR clock_gettime (3), +and set the value of +.B errno +to the same values. +.SH "FUTURE DIRECTIONS" +None. +.SH "SEE ALSO" +.BR libred.h (0), +.BR libred (7), +.BR libred_solar_elevation (3) +.SH LICENSE +Copyright \(co 2016 Mattias Andrée +.br +License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. +.br +This is free software: you are free to change and redistribute it. +.br +There is NO WARRANTY, to the extent permitted by law. +.PP +Copying and distribution of this manual, with or without modification, +are permitted in any medium without royalty provided the copyright +notice and this notice are preserved. This file is offered as-is, +without any warranty. +.SH BUGS +Please report bugs to <https://github.com/maandree/libred/issues> +or to <maandree@member.fsf.org>. + |