ar – archive and library maintainer
ar key [ posname ] afile [ file ... ]
Ar maintains groups of files combined into a single archive file,
afile. The main use of ar is to create and update library files
for the loaders 8l(1), etc. It can be used, though, for any similar
Key is one character from the set drqtpmx, optionally concatenated
with one or more of vuaibclo. The files are constituents of the
archive afile. The meanings of the key characters are:
t List a table of contents of the archive. If names are given, only those files are listed.
p Print the named files in the archive.
m Move the named files to the end or elsewhere, specified as with r.
o Preserve the access and modification times of files extracted with the x command.
x Extract the named files. If no names are given, all files in the archive are extracted. In neither case does x alter the archive file.
v Verbose. Give a file–by–file description of the making of a new archive file from the old archive and the constituent files. With p, precede each file with a name. With t, give a long listing of all information about the files, somewhat like a listing by ls(1), showing
When a d, r, or m key is specified and all members of the archive
are valid object files for the same architecture, ar inserts a
table of contents, required by the loaders, at the front of the
library. The table of contents is rebuilt whenever the archive
is modified, except when the q key is specified or when the table
contents is explicitly moved or deleted.
ar cr lib.a *.v
If the same file is mentioned twice in an argument list, it may
be put in the archive twice.
This command predates Plan 9 and makes some invalid assumptions, for instance that user id's are numeric.