You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
179 lines
7.5 KiB
179 lines
7.5 KiB
commit 5b9aaae742a79ef6001e58e5031b5f6ec03fe1ad |
|
Author: Eric Sandeen <sandeen@redhat.com> |
|
Date: Fri Jul 4 23:02:59 2014 -0400 |
|
|
|
e2fsprogs: reorder flags in chattr(1) |
|
|
|
The flags described in chattr usage() and the chattr(1) manpage |
|
were in semi-random order, which makes it hard to ascertain |
|
which flags might be missing or undocumented, and to locate |
|
flags within the manpage. |
|
|
|
Re-order the list of flags in alphanumeric order, and do |
|
the same for the flag descriptions in the body of the manpage. |
|
|
|
There should be no content changes here, just reordering |
|
for consistency. |
|
|
|
Signed-off-by: Eric Sandeen <sandeen@redhat.com> |
|
Signed-off-by: Theodore Ts'o <tytso@mit.edu> |
|
Reviewed-by: Andreas Dilger <adilger@dilger.ca> |
|
|
|
diff --git a/misc/chattr.1.in b/misc/chattr.1.in |
|
index 2a3640c..ce426e8 100644 |
|
--- a/misc/chattr.1.in |
|
+++ b/misc/chattr.1.in |
|
@@ -19,24 +19,36 @@ chattr \- change file attributes on a Linux file system |
|
.B chattr |
|
changes the file attributes on a Linux file system. |
|
.PP |
|
-The format of a symbolic mode is +-=[acdeijstuACDST]. |
|
+The format of a symbolic mode is +-=[aAcCdDeijsStTu]. |
|
.PP |
|
The operator `+' causes the selected attributes to be added to the |
|
existing attributes of the files; `-' causes them to be removed; and |
|
`=' causes them to be the only attributes that the files have. |
|
.PP |
|
-The letters `acdeijstuACDST' select the new attributes for the files: |
|
-append only (a), compressed (c), no dump (d), extent format (e), immutable (i), |
|
-data journalling (j), secure deletion (s), no tail-merging (t), |
|
-undeletable (u), no atime updates (A), no copy on write (C), |
|
-synchronous directory updates (D), synchronous updates (S), |
|
-and top of directory hierarchy (T). |
|
+The letters `aAcCdDeijsStTu' select the new attributes for the files: |
|
+append only (a), |
|
+no atime updates (A), |
|
+compressed (c), |
|
+no copy on write (C), |
|
+no dump (d), |
|
+synchronous directory updates (D), |
|
+extent format (e), |
|
+immutable (i), |
|
+data journalling (j), |
|
+secure deletion (s), |
|
+synchronous updates (S), |
|
+no tail-merging (t), |
|
+top of directory hierarchy (T), |
|
+and undeletable (u). |
|
.PP |
|
The following attributes are read-only, and may be listed by |
|
.BR lsattr (1) |
|
-but not modified by chattr: huge file (h), compression error (E), |
|
-indexed directory (I), compression raw access (X), and compressed dirty |
|
-file (Z). |
|
+but not modified by chattr: |
|
+compression error (E), |
|
+huge file (h), |
|
+indexed directory (I), |
|
+compression raw access (X), |
|
+and compressed dirty file (Z). |
|
.SH OPTIONS |
|
.TP |
|
.B \-R |
|
@@ -51,14 +63,14 @@ Suppress most error messages. |
|
.BI \-v " version" |
|
Set the file's version/generation number. |
|
.SH ATTRIBUTES |
|
-When a file with the 'A' attribute set is accessed, its atime record is |
|
-not modified. This avoids a certain amount of disk I/O for laptop |
|
-systems. |
|
-.PP |
|
A file with the `a' attribute set can only be open in append mode for writing. |
|
Only the superuser or a process possessing the CAP_LINUX_IMMUTABLE |
|
capability can set or clear this attribute. |
|
.PP |
|
+When a file with the 'A' attribute set is accessed, its atime record is |
|
+not modified. This avoids a certain amount of disk I/O for laptop |
|
+systems. |
|
+.PP |
|
A file with the `c' attribute set is automatically compressed on the disk |
|
by the kernel. A read from this file returns uncompressed data. A write to |
|
this file compresses data before storing them on the disk. Note: please |
|
@@ -74,27 +86,21 @@ be fully stable. If the 'C' flag is set on a directory, it will have no |
|
effect on the directory, but new files created in that directory will |
|
the No_COW attribute.) |
|
.PP |
|
-When a directory with the `D' attribute set is modified, |
|
-the changes are written synchronously on the disk; this is equivalent to |
|
-the `dirsync' mount option applied to a subset of the files. |
|
-.PP |
|
A file with the `d' attribute set is not candidate for backup when the |
|
.BR dump (8) |
|
program is run. |
|
.PP |
|
-The 'E' attribute is used by the experimental compression patches to |
|
-indicate that a compressed file has a compression error. It may not be |
|
-set or reset using |
|
-.BR chattr (1), |
|
-although it can be displayed by |
|
-.BR lsattr (1). |
|
+When a directory with the `D' attribute set is modified, |
|
+the changes are written synchronously on the disk; this is equivalent to |
|
+the `dirsync' mount option applied to a subset of the files. |
|
.PP |
|
The 'e' attribute indicates that the file is using extents for mapping |
|
the blocks on disk. It may not be removed using |
|
.BR chattr (1). |
|
.PP |
|
-The 'I' attribute is used by the htree code to indicate that a directory |
|
-is being indexed using hashed trees. It may not be set or reset using |
|
+The 'E' attribute is used by the experimental compression patches to |
|
+indicate that a compressed file has a compression error. It may not be |
|
+set or reset using |
|
.BR chattr (1), |
|
although it can be displayed by |
|
.BR lsattr (1). |
|
@@ -111,6 +117,12 @@ renamed, no link can be created to this file and no data can be written |
|
to the file. Only the superuser or a process possessing the |
|
CAP_LINUX_IMMUTABLE capability can set or clear this attribute. |
|
.PP |
|
+The 'I' attribute is used by the htree code to indicate that a directory |
|
+is being indexed using hashed trees. It may not be set or reset using |
|
+.BR chattr (1), |
|
+although it can be displayed by |
|
+.BR lsattr (1). |
|
+.PP |
|
A file with the `j' attribute has all of its data written to the ext3 |
|
or ext4 journal before being written to the file itself, if the filesystem |
|
is mounted with the "data=ordered" or "data=writeback" options. When the |
|
@@ -127,6 +139,13 @@ When a file with the `S' attribute set is modified, |
|
the changes are written synchronously on the disk; this is equivalent to |
|
the `sync' mount option applied to a subset of the files. |
|
.PP |
|
+A file with the 't' attribute will not have a partial block fragment at |
|
+the end of the file merged with other files (for those filesystems which |
|
+support tail-merging). This is necessary for applications such as LILO |
|
+which read the filesystem directly, and which don't understand tail-merged |
|
+files. Note: As of this writing, the ext2 or ext3 filesystems do not |
|
+(yet, except in very experimental patches) support tail-merging. |
|
+.PP |
|
A directory with the 'T' attribute will be deemed to be the top of |
|
directory hierarchies for the purposes of the Orlov block allocator. |
|
This is a hint to the block allocator used by ext3 and ext4 that the |
|
@@ -137,13 +156,6 @@ and /home/mary are placed into separate block groups. For directories |
|
where this attribute is not set, the Orlov block allocator will try to |
|
group subdirectories closer together where possible. |
|
.PP |
|
-A file with the 't' attribute will not have a partial block fragment at |
|
-the end of the file merged with other files (for those filesystems which |
|
-support tail-merging). This is necessary for applications such as LILO |
|
-which read the filesystem directly, and which don't understand tail-merged |
|
-files. Note: As of this writing, the ext2 or ext3 filesystems do not |
|
-(yet, except in very experimental patches) support tail-merging. |
|
-.PP |
|
When a file with the `u' attribute set is deleted, its contents are |
|
saved. This allows the user to ask for its undeletion. Note: please |
|
make sure to read the bugs and limitations section at the end of this |
|
diff --git a/misc/chattr.c b/misc/chattr.c |
|
index 39a6016..d5a6a61 100644 |
|
--- a/misc/chattr.c |
|
+++ b/misc/chattr.c |
|
@@ -83,7 +83,7 @@ static unsigned long sf; |
|
static void usage(void) |
|
{ |
|
fprintf(stderr, |
|
- _("Usage: %s [-RVf] [-+=AaCcDdeijsSu] [-v version] files...\n"), |
|
+ _("Usage: %s [-RVf] [-+=aAcCdDeijsSu] [-v version] files...\n"), |
|
program_name); |
|
exit(1); |
|
}
|
|
|