option: Make option help nicer to read

This adds some whitespace into the option help (including indentation)
and puts angle brackets around the type names.  Furthermore, the list
name is no longer printed as part of every line, but only once in
advance, and only if the caller did not print a caption already.

This patch also restores the description alignment we had before commit
9cbef9d68ee1d8d0, just at 24 instead of 16 characters like we used to.
This increase is because now we have the type and two spaces of
indentation before the description, and with a usual type name length of
three chracters, this sums up to eight additional characters -- which
means that we now need 24 characters to get the same amount of padding
for most options.  Also, 24 is a third of 80, which makes it kind of a
round number in terminal terms.

Finally, this patch amends the reference output of iotest 082 to match
the changes (and thus makes it pass again).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

diff --git a/include/qemu/option.h b/include/qemu/option.h
index 3dfb4493cc2bf71ea1f9564d9132a9c8ee45a6cf..844587cab3956a8e822939252fa0d548b4982b36 100644 (file)
--- a/include/qemu/option.h
+++ b/include/qemu/option.h
@@ -132,7 +132,7 @@ typedef int (*qemu_opts_loopfunc)(void *opaque, QemuOpts *opts, Error **errp);
 int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func,
                       void *opaque, Error **errp);
 void qemu_opts_print(QemuOpts *opts, const char *sep);
-void qemu_opts_print_help(QemuOptsList *list);
+void qemu_opts_print_help(QemuOptsList *list, bool print_caption);
 void qemu_opts_free(QemuOptsList *list);
 QemuOptsList *qemu_opts_append(QemuOptsList *dst, QemuOptsList *list);
 

diff --git a/qemu-img.c b/qemu-img.c
index b12f4cd19b0a938dba9f5d8b3bfde5d52ab7bfae..4c96db7ba468aa9a2c6a717740227790b0e89376 100644 (file)
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -269,7 +269,7 @@ static int print_block_option_help(const char *filename, const char *fmt)
     }
 
     printf("Supported options:\n");
-    qemu_opts_print_help(create_opts);
+    qemu_opts_print_help(create_opts, false);
     qemu_opts_free(create_opts);
     return 0;
 }
@@ -3773,7 +3773,7 @@ static int print_amend_option_help(const char *format)
     assert(drv->create_opts);
 
     printf("Creation options for '%s':\n", format);
-    qemu_opts_print_help(drv->create_opts);
+    qemu_opts_print_help(drv->create_opts, false);
     printf("\nNote that not all of these options may be amendable.\n");
     return 0;
 }

diff --git a/tests/qemu-iotests/082.out b/tests/qemu-iotests/082.out
index 19e9fb13ff03694aca4d49ff9478c2b3380401f6..0ce18c075b10d51e6cba3b6be7e1691228f4ce17 100644 (file)
--- a/tests/qemu-iotests/082.out
+++ b/tests/qemu-iotests/082.out
@@ -44,171 +44,171 @@ cluster_size: 8192
 
 Testing: create -f qcow2 -o help TEST_DIR/t.qcow2 128M
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: create -f qcow2 -o ? TEST_DIR/t.qcow2 128M
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: create -f qcow2 -o cluster_size=4k,help TEST_DIR/t.qcow2 128M
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: create -f qcow2 -o cluster_size=4k,? TEST_DIR/t.qcow2 128M
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: create -f qcow2 -o help,cluster_size=4k TEST_DIR/t.qcow2 128M
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: create -f qcow2 -o ?,cluster_size=4k TEST_DIR/t.qcow2 128M
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: create -f qcow2 -o cluster_size=4k -o help TEST_DIR/t.qcow2 128M
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: create -f qcow2 -o cluster_size=4k -o ? TEST_DIR/t.qcow2 128M
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: create -f qcow2 -u -o backing_file=TEST_DIR/t.qcow2,,help TEST_DIR/t.qcow2 128M
 Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 backing_file=TEST_DIR/t.qcow2,,help cluster_size=65536 lazy_refcounts=off refcount_bits=16
@@ -227,27 +227,27 @@ qemu-img: Invalid option list: ,,
 
 Testing: create -f qcow2 -o help
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: create -o help
 Supported options:
-size             Virtual disk size
+  size=<size>            - Virtual disk size
 
 Testing: create -f bochs -o help
 qemu-img: Format driver 'bochs' does not support image creation
@@ -300,171 +300,171 @@ cluster_size: 8192
 
 Testing: convert -O qcow2 -o help TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: convert -O qcow2 -o ? TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: convert -O qcow2 -o cluster_size=4k,help TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: convert -O qcow2 -o cluster_size=4k,? TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: convert -O qcow2 -o help,cluster_size=4k TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: convert -O qcow2 -o ?,cluster_size=4k TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: convert -O qcow2 -o cluster_size=4k -o help TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: convert -O qcow2 -o cluster_size=4k -o ? TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
-nocow            Turn off copy-on-write (valid only on btrfs)
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: convert -O qcow2 -o backing_file=TEST_DIR/t.qcow2,,help TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
 qemu-img: Could not open 'TEST_DIR/t.qcow2.base': Could not open backing file: Could not open 'TEST_DIR/t.qcow2,help': No such file or directory
@@ -483,27 +483,27 @@ qemu-img: Invalid option list: ,,
 
 Testing: convert -O qcow2 -o help
 Supported options:
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Testing: convert -o help
 Supported options:
-size             Virtual disk size
+  size=<size>            - Virtual disk size
 
 Testing: convert -O bochs -o help
 qemu-img: Format driver 'bochs' does not support image creation
@@ -564,177 +564,177 @@ cluster_size: 65536
 
 Testing: amend -f qcow2 -o help TEST_DIR/t.qcow2
 Creation options for 'qcow2':
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Note that not all of these options may be amendable.
 
 Testing: amend -f qcow2 -o ? TEST_DIR/t.qcow2
 Creation options for 'qcow2':
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Note that not all of these options may be amendable.
 
 Testing: amend -f qcow2 -o cluster_size=4k,help TEST_DIR/t.qcow2
 Creation options for 'qcow2':
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Note that not all of these options may be amendable.
 
 Testing: amend -f qcow2 -o cluster_size=4k,? TEST_DIR/t.qcow2
 Creation options for 'qcow2':
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Note that not all of these options may be amendable.
 
 Testing: amend -f qcow2 -o help,cluster_size=4k TEST_DIR/t.qcow2
 Creation options for 'qcow2':
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Note that not all of these options may be amendable.
 
 Testing: amend -f qcow2 -o ?,cluster_size=4k TEST_DIR/t.qcow2
 Creation options for 'qcow2':
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Note that not all of these options may be amendable.
 
 Testing: amend -f qcow2 -o cluster_size=4k -o help TEST_DIR/t.qcow2
 Creation options for 'qcow2':
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Note that not all of these options may be amendable.
 
 Testing: amend -f qcow2 -o cluster_size=4k -o ? TEST_DIR/t.qcow2
 Creation options for 'qcow2':
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Note that not all of these options may be amendable.
 
@@ -757,29 +757,29 @@ qemu-img: Invalid option list: ,,
 
 Testing: amend -f qcow2 -o help
 Creation options for 'qcow2':
-size             Virtual disk size
-compat           Compatibility level (0.10 or 1.1)
-backing_file     File name of a base image
-backing_fmt      Image format of the base image
-encryption       Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
-encrypt.format   Encrypt the image, format choices: 'aes', 'luks'
-encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase
-encrypt.cipher-alg Name of encryption cipher algorithm
-encrypt.cipher-mode Name of encryption cipher mode
-encrypt.ivgen-alg Name of IV generator algorithm
-encrypt.ivgen-hash-alg Name of IV generator hash algorithm
-encrypt.hash-alg Name of encryption hash algorithm
-encrypt.iter-time Time to spend in PBKDF in milliseconds
-cluster_size     qcow2 cluster size
-preallocation    Preallocation mode (allowed values: off, metadata, falloc, full)
-lazy_refcounts   Postpone refcount updates
-refcount_bits    Width of a reference count entry in bits
+  backing_file=<str>     - File name of a base image
+  backing_fmt=<str>      - Image format of the base image
+  cluster_size=<size>    - qcow2 cluster size
+  compat=<str>           - Compatibility level (0.10 or 1.1)
+  encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
+  encrypt.cipher-mode=<str> - Name of encryption cipher mode
+  encrypt.format=<str>   - Encrypt the image, format choices: 'aes', 'luks'
+  encrypt.hash-alg=<str> - Name of encryption hash algorithm
+  encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds
+  encrypt.ivgen-alg=<str> - Name of IV generator algorithm
+  encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
+  encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase
+  encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes)
+  lazy_refcounts=<bool (on/off)> - Postpone refcount updates
+  preallocation=<str>    - Preallocation mode (allowed values: off, metadata, falloc, full)
+  refcount_bits=<num>    - Width of a reference count entry in bits
+  size=<size>            - Virtual disk size
 
 Note that not all of these options may be amendable.
 
 Testing: convert -o help
 Supported options:
-size             Virtual disk size
+  size=<size>            - Virtual disk size
 
 Testing: amend -f bochs -o help
 qemu-img: Format driver 'bochs' does not support option amendment

diff --git a/util/qemu-option.c b/util/qemu-option.c
index 9a5f263294cbfaa51cf6529b633b417026fd0bcb..de42e2a406ad24e645344f3b7e5be0849500faa5 100644 (file)
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -224,7 +224,14 @@ static const char *opt_type_to_string(enum QemuOptType type)
     g_assert_not_reached();
 }
 
-void qemu_opts_print_help(QemuOptsList *list)
+/**
+ * Print the list of options available in the given list.  If
+ * @print_caption is true, a caption (including the list name, if it
+ * exists) is printed.  The options itself will be indented, so
+ * @print_caption should only be set to false if the caller prints its
+ * own custom caption (so that the indentation makes sense).
+ */
+void qemu_opts_print_help(QemuOptsList *list, bool print_caption)
 {
     QemuOptDesc *desc;
     int i;
@@ -234,12 +241,12 @@ void qemu_opts_print_help(QemuOptsList *list)
     desc = list->desc;
     while (desc && desc->name) {
         GString *str = g_string_new(NULL);
-        if (list->name) {
-            g_string_append_printf(str, "%s.", list->name);
-        }
-        g_string_append_printf(str, "%s=%s", desc->name,
+        g_string_append_printf(str, "  %s=<%s>", desc->name,
                                opt_type_to_string(desc->type));
         if (desc->help) {
+            if (str->len < 24) {
+                g_string_append_printf(str, "%*s", 24 - (int)str->len, "");
+            }
             g_string_append_printf(str, " - %s", desc->help);
         }
         g_ptr_array_add(array, g_string_free(str, false));
@@ -247,6 +254,19 @@ void qemu_opts_print_help(QemuOptsList *list)
     }
 
     g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
+    if (print_caption && array->len > 0) {
+        if (list->name) {
+            printf("%s options:\n", list->name);
+        } else {
+            printf("Options:\n");
+        }
+    } else if (array->len == 0) {
+        if (list->name) {
+            printf("There are no options for %s.\n", list->name);
+        } else {
+            printf("No options available.\n");
+        }
+    }
     for (i = 0; i < array->len; i++) {
         printf("%s\n", (char *)array->pdata[i]);
     }
@@ -930,7 +950,7 @@ QemuOpts *qemu_opts_parse_noisily(QemuOptsList *list, const char *params,
     opts = opts_parse(list, params, permit_abbrev, false, &invalidp, &err);
     if (err) {
         if (invalidp && has_help_option(params)) {
-            qemu_opts_print_help(list);
+            qemu_opts_print_help(list, true);
             error_free(err);
         } else {
             error_report_err(err);