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-rw-r--r--doc/gpg.texi24
1 files changed, 18 insertions, 6 deletions
diff --git a/doc/gpg.texi b/doc/gpg.texi
index 804ecf94a..457088eb3 100644
--- a/doc/gpg.texi
+++ b/doc/gpg.texi
@@ -635,12 +635,13 @@ The @option{--dearmor} command can also be used to dearmor PEM armors.
@item --unwrap
@opindex unwrap
-This command is similar to @option{--decrypt} with the change that the
+This command is similar to @option{--decrypt} with the difference that the
output is not the usual plaintext but the original message with the
-decryption layer removed. Thus the output will be an OpenPGP data
+encryption layer removed. Thus the output will be an OpenPGP data
structure which often means a signed OpenPGP message. Note that this
command may or may not remove a compression layer which is often found
-beneath the encryption layer.
+beneath the encryption layer. Without the option @option{--output}
+the result is written to a file with the suffix stripped.
@item --tofu-policy @{auto|good|unknown|bad|ask@} @var{keys}
@opindex tofu-policy
@@ -860,9 +861,10 @@ line.
@opindex keyedit:tsign
Make a trust signature. This is a signature that combines the notions
of certification (like a regular signature), and trust (like the
- "trust" command). It is generally only useful in distinct communities
- or groups. For more information please read the sections
- ``Trust Signature'' and ``Regular Expression'' in RFC-4880.
+ "trust" command). It is generally useful in distinct communities
+ or groups to implement the concept of a Trusted Introducer. For
+ more information please read the sections ``Trust Signature'' and
+ ``Regular Expression'' in RFC-4880.
@end table
@c man:.RS
@@ -1658,6 +1660,16 @@ for the BZIP2 compression algorithm (defaulting to 6 as well). This is a
different option from @option{--compress-level} since BZIP2 uses a
significant amount of memory for each additional compression level.
@option{-z} sets both. A value of 0 for @var{n} disables compression.
+A value of -1 forces compression using the default level.
+
+Except for the @option{--store} command compression is always used
+unless @command{gpg} detects that the input is already compressed. To
+inhibit the use of compression use @option{-z0}; to force compression
+use @option{-z-1} or option @option{z} with another compression level
+than the default as indicated by -1. Note that this overriding of the
+default deection works only with @option{z} and not with the long
+variant of this option.
+
@item --bzip2-decompress-lowmem
@opindex bzip2-decompress-lowmem