mke2fs.8.in: add ENVIRONMENT section

Add ENVIRONMENT section and describe behavior of MKE2FS_SYNC,
MKE2FS_CONFIG, MKE2FS_FIRST_META_BG, MKE2FS_DEVICE_SECTSIZE
and MKE2FS_SKIP_CHECK_MSG.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/misc/mke2fs.8.in b/misc/mke2fs.8.in
index b64d2aae0008678c657b633eed69f067a8946852..2eead17f2ba7d8345b804682fa9adf9ac7f5095a 100644 (file)
--- a/misc/mke2fs.8.in
+++ b/misc/mke2fs.8.in
@@ -646,6 +646,29 @@ Verbose execution.
 Print the version number of
 .B mke2fs
 and exit.
+.SH ENVIRONMENT
+.TP
+.BI MKE2FS_SYNC
+If set to non-zero integer value, its value is used to determine how often
+.BR sync (2)
+is called during inode table initialization.
+.TP
+.BI MKE2FS_CONFIG
+Determines the location of the configuration file (see
+.BR mke2fs.conf (5)).
+.TP
+.BI MKE2FS_FIRST_META_BG
+If set to non-zero integer value, its value is used to determine first meta
+block group. This is mostly for debugging purposes.
+.TP
+.BI MKE2FS_DEVICE_SECTSIZE
+If set to non-zero integer value, its value is used to determine physical
+sector size of the
+.IR device .
+.TP
+.BI MKE2FS_SKIP_CHECK_MSG
+If set, do not show the message of filesystem automatic check caused by
+mount count or check interval.
 .SH AUTHOR
 This version of
 .B mke2fs