2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
340 lines
8.4 KiB
Groff
340 lines
8.4 KiB
Groff
.\" $NetBSD: strptime.3,v 1.27 2009/05/24 02:30:17 ginsbach Exp $
|
|
.\"
|
|
.\" Copyright (c) 1997, 1998, 2008 The NetBSD Foundation, Inc.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This file was contributed to The NetBSD Foundation by Klaus Klein.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
.\" POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.Dd May 24, 2009
|
|
.Dt STRPTIME 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm strptime
|
|
.Nd converts a character string to a time value
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In time.h
|
|
.Ft char *
|
|
.Fn strptime "const char * restrict buf" "const char * restrict format" "struct tm * restrict tm"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn strptime
|
|
function converts the character string pointed to by
|
|
.Fa buf
|
|
to values which are stored in the
|
|
.Va tm
|
|
structure pointed to by
|
|
.Fa tm ,
|
|
using the format specified by
|
|
.Fa format .
|
|
.Pp
|
|
The
|
|
.Fa format
|
|
string consists of zero or more conversion specifications, whitespace
|
|
characters as defined by
|
|
.Fn isspace ,
|
|
and ordinary characters.
|
|
All ordinary characters in
|
|
.Fa format
|
|
are compared directly against the corresponding characters in
|
|
.Fa buf ;
|
|
comparisons which fail will cause
|
|
.Fn strptime
|
|
to fail.
|
|
Whitespace characters in
|
|
.Fa format
|
|
match any number of whitespace characters in
|
|
.Fa buf ,
|
|
including none.
|
|
.Pp
|
|
A conversion specification consists of a percent sign
|
|
.Ql %
|
|
followed by one
|
|
or two conversion characters which specify the replacement required.
|
|
There must be white-space or other non-alphanumeric characters between any
|
|
two conversion specifications.
|
|
.Pp
|
|
Conversion of alphanumeric strings (such as month and weekday names) is
|
|
done without regard to case.
|
|
Conversion specifications which cannot be matched will cause
|
|
.Fn strptime
|
|
to fail.
|
|
.Pp
|
|
The LC_TIME category defines the locale values for the conversion
|
|
specifications.
|
|
The following conversion specifications are supported:
|
|
.Bl -tag -width "xxxx"
|
|
.It Cm \&%a
|
|
the day of week, using the locale's weekday names;
|
|
either the abbreviated or full name may be specified.
|
|
.It Cm \&%A
|
|
the same as
|
|
.Cm \&%a .
|
|
.It Cm \&%b
|
|
the month, using the locale's month names;
|
|
either the abbreviated or full name may be specified.
|
|
.It Cm \&%B
|
|
the same as
|
|
.Cm \&%b .
|
|
.It Cm \&%c
|
|
the date and time, using the locale's date and time format.
|
|
.It Cm \&%C
|
|
the century number [0,99];
|
|
leading zeros are permitted but not required.
|
|
This conversion should be used in conjunction with the \&%y conversion.
|
|
.It Cm \&%d
|
|
the day of month [1,31];
|
|
leading zeros are permitted but not required.
|
|
.It Cm \&%D
|
|
the date as %m/%d/%y.
|
|
.It Cm \&%e
|
|
the same as
|
|
.Cm \&%d .
|
|
.It Cm \&%F
|
|
the date as %Y-%m-%d
|
|
(the ISO 8601 date format).
|
|
.It Cm \&%g
|
|
the year corresponding to the ISO week number, without the century.
|
|
.Po
|
|
A
|
|
.Nx
|
|
extension.
|
|
.Pc
|
|
.It Cm \&%G
|
|
the year corresponding to the ISO week number, with the century.
|
|
.Po
|
|
A
|
|
.Nx
|
|
extension.
|
|
.Pc
|
|
.It Cm \&%h
|
|
the same as
|
|
.Cm \&%b .
|
|
.It Cm \&%H
|
|
the hour (24-hour clock) [0,23];
|
|
leading zeros are permitted but not required.
|
|
.It Cm \&%I
|
|
the hour (12-hour clock) [1,12];
|
|
leading zeros are permitted but not required.
|
|
.It Cm \&%j
|
|
the day number of the year [1,366];
|
|
leading zeros are permitted but not required.
|
|
.It Cm \&%k
|
|
the same as
|
|
.Cm \&%H .
|
|
.It Cm \&%l
|
|
the same as
|
|
.Cm \&%I .
|
|
.It Cm \&%m
|
|
the month number [1,12];
|
|
leading zeros are permitted but not required.
|
|
.It Cm \&%M
|
|
the minute [0,59];
|
|
leading zeros are permitted but not required.
|
|
.It Cm \&%n
|
|
any white-space, including none.
|
|
.It Cm \&%p
|
|
the locale's equivalent of a.m. or p.m.
|
|
.It Cm \&%r
|
|
the time (12-hour clock) with %p, using the locale's time format.
|
|
.It Cm \&%R
|
|
the time as %H:%M.
|
|
.It Cm \&%S
|
|
the seconds [0,61];
|
|
leading zeros are permitted but not required.
|
|
.It Cm \&%s
|
|
the number of seconds since the Epoch, UTC (see
|
|
.Xr mktime 3 ) .
|
|
.Po
|
|
A
|
|
.Nx
|
|
extension.
|
|
.Pc
|
|
.It Cm \&%t
|
|
any white-space, including none.
|
|
.It Cm \&%T
|
|
the time as %H:%M:%S.
|
|
.It Cm \&%u
|
|
the day of the week as a decimal number, where Monday = 1.
|
|
.Po
|
|
A
|
|
.Nx
|
|
extension.
|
|
.Pc
|
|
.It Cm \&%U
|
|
the week number of the year (Sunday as the first day of the week)
|
|
as a decimal number [0,53];
|
|
leading zeros are permitted but not required.
|
|
All days in a year preceding the first Sunday are considered to be in week 0.
|
|
.It Cm \&%V
|
|
the ISO 8601:1988 week number as a decimal number.
|
|
If the week (starting on Monday) that contains January 1 has more than
|
|
three days in the new year, then it is considered the first week of the
|
|
year.
|
|
If it has fewer than four days in the new year, then it is considered
|
|
the last week of the previous year.
|
|
Weeks are numbered from 1 to 53.
|
|
.Po
|
|
A
|
|
.Nx
|
|
extension.
|
|
.Pc
|
|
.It Cm \&%w
|
|
the weekday as a decimal number [0,6], with 0 representing Sunday;
|
|
leading zeros are permitted but not required.
|
|
.It Cm \&%W
|
|
the week number of the year (Monday as the first day of the week)
|
|
as a decimal number [0,53];
|
|
leading zeros are permitted but not required.
|
|
All days in a year preceding the first Monday are considered to be in week 0.
|
|
.It Cm \&%x
|
|
the date, using the locale's date format.
|
|
.It Cm \&%X
|
|
the time, using the locale's time format.
|
|
.It Cm \&%y
|
|
the year within the 20th century [69,99] or the 21st century [0,68];
|
|
leading zeros are permitted but not required.
|
|
If specified in conjunction
|
|
with \&%C, specifies the year [0,99] within that century.
|
|
.It Cm \&%Y
|
|
the year, including the century (i.e., 1996).
|
|
.It Cm \&%z
|
|
an ISO 8601 or RFC-2822 timezone specification.
|
|
This is one of the following:
|
|
the offset from
|
|
Coordinated Universal Time
|
|
.Pq Ql UTC
|
|
specified as:
|
|
.Dq [+-]hhmm ,
|
|
.Dq [+-]hh:mm ,
|
|
or
|
|
.Dq [+-]hh ;
|
|
.Ql UTC
|
|
specified as:
|
|
.Dq GMT
|
|
.Pq Ql Greenwich Mean Time ,
|
|
.Dq UT
|
|
.Pq Ql Universal Time ,
|
|
or
|
|
.Dq Z
|
|
.Pq Ql Zulu Time ;
|
|
a three character US timezone specified as:
|
|
.Dq EDT ,
|
|
.Dq EST ,
|
|
.Dq CDT ,
|
|
.Dq CST ,
|
|
.Dq MDT ,
|
|
.Dq MST ,
|
|
.Dq PDT ,
|
|
or
|
|
.Dq PST ,
|
|
with the first letter standing for
|
|
.Ql Eastern
|
|
.Pq Dq E ,
|
|
.Ql Central
|
|
.Pq Dq C ,
|
|
.Ql Mountain
|
|
.Pq Dq M
|
|
or
|
|
.Ql Pacific
|
|
.Pq Dq P ,
|
|
and the second letter standing for
|
|
.Ql Daylight
|
|
.Po
|
|
.Dq D
|
|
or summer
|
|
.Pc
|
|
time
|
|
or
|
|
.Ql Standard
|
|
.Pq Dq S
|
|
time;
|
|
a single letter military timezone specified as:
|
|
.Dq A
|
|
through
|
|
.Dq I
|
|
and
|
|
.Dq K
|
|
through
|
|
.Dq Y .
|
|
.Po
|
|
A
|
|
.Nx
|
|
extension.
|
|
.Pc
|
|
.It Cm \&%Z
|
|
timezone name or no characters when time zone information is unavailable.
|
|
.Po
|
|
A
|
|
.Nx
|
|
extension.
|
|
.Pc
|
|
.It Cm \&%%
|
|
matches a literal `%'.
|
|
No argument is converted.
|
|
.El
|
|
.Ss Modified conversion specifications
|
|
For compatibility, certain conversion specifications can be modified
|
|
by the
|
|
.Cm E
|
|
and
|
|
.Cm O
|
|
modifier characters to indicate that an alternative format or specification
|
|
should be used rather than the one normally used by the unmodified
|
|
conversion specification.
|
|
As there are currently neither alternative formats
|
|
nor specifications supported by the system, the behavior will be as if the
|
|
unmodified conversion specification were used.
|
|
.Pp
|
|
Case is ignored when matching string items in
|
|
.Fa buf ,
|
|
such as month and weekday names.
|
|
.Sh RETURN VALUES
|
|
If successful, the
|
|
.Fn strptime
|
|
function returns a pointer to the character following the last character
|
|
parsed.
|
|
Otherwise, a null pointer is returned.
|
|
.Sh SEE ALSO
|
|
.Xr ctime 3 ,
|
|
.Xr isspace 3 ,
|
|
.Xr localtime 3 ,
|
|
.Xr strftime 3
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn strptime
|
|
function conforms to
|
|
.St -xpg4 .
|
|
.Sh BUGS
|
|
The
|
|
.Cm \&%Z
|
|
format specifier only accepts timezone
|
|
abbreviations of the local timezone,
|
|
or the value
|
|
.Dq GMT .
|
|
This limitation is caused by the ambiguity
|
|
of overloaded timezone abbreviations,
|
|
for example EST is both Eastern Standard
|
|
Time and Eastern Australia Summer Time.
|