diff options
author | wollman <wollman@FreeBSD.org> | 1994-08-05 19:00:04 +0000 |
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committer | wollman <wollman@FreeBSD.org> | 1994-08-05 19:00:04 +0000 |
commit | 3ac06aac07cc33b027d1fa594ed74029dcb95797 (patch) | |
tree | 80d81dd90d559a596166cc04bb574b989c5382ee /usr.bin/ar/ar.5 | |
parent | 2751343523c9bb9aa93dd1140a938c0f6077551a (diff) | |
download | FreeBSD-src-3ac06aac07cc33b027d1fa594ed74029dcb95797.zip FreeBSD-src-3ac06aac07cc33b027d1fa594ed74029dcb95797.tar.gz |
More merry makefile munging for man page compatability.
Diffstat (limited to 'usr.bin/ar/ar.5')
-rw-r--r-- | usr.bin/ar/ar.5 | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/usr.bin/ar/ar.5 b/usr.bin/ar/ar.5 new file mode 100644 index 0000000..29c8f8c --- /dev/null +++ b/usr.bin/ar/ar.5 @@ -0,0 +1,145 @@ +.\" Copyright (c) 1990, 1991, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" 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. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. +.\" +.\" @(#)ar.5.5 8.1 (Berkeley) 6/9/93 +.\" +.Dd June 9, 1993 +.Dt AR 5 +.Os +.Sh NAME +.Nm ar +.Nd archive (library) file format +.Sh SYNOPSIS +.Fd #include <ar.h> +.Sh DESCRIPTION +The archive command +.Nm ar +combines several files into one. +Archives are mainly used as libraries of object files intended to be +loaded using the link-editor +.Xr ld 1 . +.Pp +A file created with +.Nm ar +begins with the ``magic'' string "!<arch>\en". +The rest of the archive is made up of objects, each of which is composed +of a header for a file, a possible file name, and the file contents. +The header is portable between machine architectures, and, if the file +contents are printable, the archive is itself printable. +.Pp +The header is made up of six variable length +.Tn ASCII +fields, followed by a +two character trailer. +The fields are the object name (16 characters), the file last modification +time (12 characters), the user and group id's (each 6 characters), the file +mode (8 characters) and the file size (10 characters). +All numeric fields are in decimal, except for the file mode which is in +octal. +.Pp +The modification time is the file +.Fa st_mtime +field, i.e., +.Dv CUT +seconds since +the epoch. +The user and group id's are the file +.Fa st_uid +and +.Fa st_gid +fields. +The file mode is the file +.Fa st_mode +field. +The file size is the file +.Fa st_size +field. +The two-byte trailer is the string "\`\en". +.Pp +Only the name field has any provision for overflow. +If any file name is more than 16 characters in length or contains an +embedded space, the string "#1/" followed by the +.Tn ASCII +length of the +name is written in the name field. +The file size (stored in the archive header) is incremented by the length +of the name. +The name is then written immediately following the archive header. +.Pp +Any unused characters in any of these fields are written as space +characters. +If any fields are their particular maximum number of characters in +length, there will be no separation between the fields. +.Pp +Objects in the archive are always an even number of bytes long; files +which are an odd number of bytes long are padded with a newline (``\en'') +character, although the size in the header does not reflect this. +.Sh SEE ALSO +.Xr ar 1 , +.Xr stat 2 +.Sh HISTORY +There have been at least four +.Nm ar +formats. +The first was denoted by the leading ``magic'' number 0177555 (stored as +type int). +These archives were almost certainly created on a 16-bit machine, and +contain headers made up of five fields. +The fields are the object name (8 characters), the file last modification +time (type long), the user id (type char), the file mode (type char) and +the file size (type unsigned int). +Files were padded to an even number of bytes. +.Pp +The second was denoted by the leading ``magic'' number 0177545 (stored as +type int). +These archives may have been created on either 16 or 32-bit machines, and +contain headers made up of six fields. +The fields are the object name (14 characters), the file last modification +time (type long), the user and group id's (each type char), the file mode +(type int) and the file size (type long). +Files were padded to an even number of bytes. +For more information on converting from this format see +.Xr arcv 8 . +.Pp +The current archive format (without support for long character names and +names with embedded spaces) was introduced in +.Bx 4.0 . +The headers were the same as the current format, with the exception that +names longer than 16 characters were truncated, and names with embedded +spaces (and often trailing spaces) were not supported. +It has been extended for these reasons, +as described above. +This format first appeared in 4.4BSD. +.Sh COMPATIBILITY +No archive format is currently specified by any standard. +.At V +has historically distributed archives in a different format from +all of the above. |