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+.pa 1
+.he 'ARCHIVE (V)'3/15/72'ARCHIVE (V)'
+.ti 0
+NAME		archive (library) file format
+.sp
+.ti 0
+DESCRIPTION	The
+archive command ar__ is used to combine several files into
+one.
+Archives are used mainly as libraries to be searched
+by the link-editor ld__.
+
+A file produced by ar__
+has a "magic number" at the start,
+followed by the constituent files, each preceded by a file header.
+The magic number is
+177555(8)
+(it was chosen to be unlikely to occur anywhere else).
+The header of each file is 16 bytes long:
+
+.in +5
+.ti -3
+0-7
+.br
+file name, null padded on the right
+
+.ti -3
+8-11
+.br
+Modification time of the file
+
+.ti -3
+12
+.br
+User ID of file owner
+
+.ti -3
+13
+.br
+file mode
+
+.ti -3
+14-15
+.br
+file size
+
+.in -5
+If the file is an odd number of bytes long, it is padded
+with a null byte, but the size in the header is correct.
+
+Notice there is no provision for empty areas in an archive
+file.
+.sp
+.ti 0
+SEE ALSO	ar__, ld__