-.TH WIMLIB-IMAGEX "1" "January 2016" "wimlib 1.9.0" "User Commands"
+.TH WIMLIB-IMAGEX "1" "June 2016" "wimlib 1.9.2" "User Commands"
.SH NAME
wimlib-imagex-capture, wimlib-imagex-append \- Create or append a WIM image
.SH SYNOPSIS
labels and POSIX ACLs). Also note that last status change times (ctime) are not
stored.
.PP
+Filenames and symbolic link targets on UNIX filesystems which are not valid
+UTF-8 with the addition of surrogate codepoints are unsupported. Note: if you
+have a filesystem containing filenames in another multibyte encoding, such as
+ISO-8859-1, and you wish to archive it with wimlib, you may be able to mount it
+with an option which causes its filenames to be presented as UTF-8.
+.PP
Pedantic note: A limitation of the WIM format prevents the unusual case where a
single symbolic link file itself has multiple names (hard links); in this
unlikely case, each symbolic link is stored as an independent file.
optimized by not reading files that, based on metadata such as timestamps,
appear not to have been modified since they were archived in the existing
\fIIMAGE\fR. Barring manipulation of timestamps, this option only affects
-performance and does not change the resulting WIM image.
+performance and does not change the resulting WIM image (but see note below).
.IP ""
As shown, the full syntax for the argument to this option is to specify the WIM
file, a colon, and the image; for example, "--update-of mywim.wim:1". However,
to the WIM file being appended to for append operations, or the WIM file from
which a delta is being taken (only if \fB--delta-from\fR is specified exactly
once) for capture operations.
+.IP ""
+Note: in the Windows version of wimlib, it has been observed that
+\fB--update-of\fR mode is not completely reliable at detecting changes in file
+contents, sometimes causing the old contents of a few files to be archived
+rather than the current contents. The cause of this problem is that Windows
+does not immediately update a file's last modification timestamp after every
+write to that file. Unfortunately, there is no known way for applications like
+wimlib to automatically work around this bug. Manual workarounds are possible;
+theoretically, taking any action that causes the problematic files to be closed,
+such as restarting applications or the computer itself, should cause the files'
+last modification timestamps to be updated. Also note that wimlib compares file
+sizes as well as timestamps in determining whether a file has changed, which
+helps make the problem less likely to occur; and the problem does not occur on
+other operating systems such as Linux which maintain files' last modification
+timestamps correctly.
.TP
\fB--delta-from\fR=\fIWIMFILE\fR
For \fBwimlib-imagex capture\fR only: capture the new WIM as a "delta" from
however, this may still be overridden through the \fB--config\fR parameter.
.TP
\fB--unsafe-compact\fR
-See the documentation for this option in \fBwimlib-imagex-optimize\fR (1).
+For \fBwimlib-imagex append\fR: compact the WIM archive in-place and append any
+new data, eliminating "holes". In general, this option should \fInot\fR be used
+because a failed or interrupted compaction will corrupt the WIM archive. For
+more information, see the documentation for this option in
+\fBwimlib-imagex-optimize\fR (1).
.TP
\fB--snapshot\fR
Create a temporary filesystem snapshot of the source directory and capture the
git://wimlib.net / wimlib / blobdiff