The functionality is already there, with --punch-hole, but the text was for the
preallocation case only.
Signed-off-by: Rodrigo Campos <rodrigo@xxxxxxxxxxx>
---
sys-utils/fallocate.1 | 11 ++++++-----
sys-utils/fallocate.c | 4 ++--
2 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/sys-utils/fallocate.1 b/sys-utils/fallocate.1
index d462cee..efa42c1 100644
--- a/sys-utils/fallocate.1
+++ b/sys-utils/fallocate.1
@@ -1,7 +1,7 @@
.\" -*- nroff -*-
.TH FALLOCATE 1 "September 2011" "util-linux" "User Commands"
.SH NAME
-fallocate \- preallocate space to a file
+fallocate \- preallocate or deallocate space to a file
.SH SYNOPSIS
.B fallocate
.RB [ \-n ]
@@ -13,10 +13,11 @@ fallocate \- preallocate space to a file
.I filename
.SH DESCRIPTION
.B fallocate
-is used to preallocate blocks to a file. For filesystems which support the
-fallocate system call, this is done quickly by allocating blocks and marking
-them as uninitialized, requiring no IO to the data blocks. This is much faster
-than creating a file by filling it with zeros.
+is used to manipulate the allocated disk space for a file, either to deallocate
+or preallocate it. For filesystems which support the fallocate system call,
+preallocation is done quickly by allocating blocks and marking them as
+uninitialized, requiring no IO to the data blocks. This is much faster than
+creating a file by filling it with zeros.
.PP
As of the Linux Kernel v2.6.31, the fallocate system call is supported by the
btrfs, ext4, ocfs2, and xfs filesystems.
diff --git a/sys-utils/fallocate.c b/sys-utils/fallocate.c
index cd35b2d..55e8411 100644
--- a/sys-utils/fallocate.c
+++ b/sys-utils/fallocate.c
@@ -62,8 +62,8 @@ static void __attribute__((__noreturn__)) usage(FILE *out)
fputs(USAGE_OPTIONS, out);
fputs(_(" -n, --keep-size don't modify the length of the file\n"
" -p, --punch-hole punch holes in the file\n"
- " -o, --offset <num> offset of the allocation, in bytes\n"
- " -l, --length <num> length of the allocation, in bytes\n"), out);
+ " -o, --offset <num> offset of the (de)allocation, in bytes\n"
+ " -l, --length <num> length of the (de)allocation, in bytes\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(USAGE_HELP, out);
fputs(USAGE_VERSION, out);
--
1.8.5.2
--
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