Add a note that the use of -B option does not guarantee a size of fra…

…gment if -z option also used. Recommend the use of zip(1) if compressed files of predictable size needed. PR: docs/41089 Submitted by: Sevan Janiyan Reported by: [email protected] While here, pet igor Reviewed by: bcr Differential Revision: https://reviews.freebsd.org/D18686
stacktic · Dec 29, 2018 · 665441b · 665441b
1 parent 47afbdf
commit 665441b
Showing 1 changed file with 13 additions and 3 deletions.
diff --git a/bin/pax/pax.1 b/bin/pax/pax.1
@@ -33,7 +33,7 @@
 .\"	@(#)pax.1	8.4 (Berkeley) 4/18/94
 .\" $FreeBSD$
 .\"
-.Dd March 17, 2015
+.Dd December 29, 2018
 .Dt PAX 1
 .Os
 .Sh NAME
@@ -793,6 +793,16 @@ limits can be separated by
 .Li x
 to indicate a product.
 .Pp
+Note that the specified size is for the uncompressed pax image itself.
+If the
+.Fl z
+option is also used, the resulting file may contain fewer
+.Ar bytes ,
+according to the compressibility of the archive contents.
+See
+.Xr zip 1
+if compressed volumes of predictable size are required.
+.Pp
 .Em Warning :
 Only use this option when writing an archive to a device which supports
 an end of file read condition based on last (or largest) write offset
@@ -804,7 +814,7 @@ This option is the same as the
 option, except that the file inode change time is checked instead of the
 file modification time.
 The file inode change time can be used to select files whose inode information
-(e.g.\& uid, gid, etc.) is newer than a copy of the file in the destination
+(e.g., uid, gid, etc.) is newer than a copy of the file in the destination
 .Ar directory .
 .It Fl E Ar limit
 Limit the number of consecutive read faults while trying to read a flawed
@@ -903,7 +913,7 @@ the file was last written).
 The
 .Ar c
 specifies the comparison of inode change time (the time when the file
-inode was last changed; e.g.\& a change of owner, group, mode, etc).
+inode was last changed; e.g., a change of owner, group, mode, etc).
 When
 .Ar c
 and