[PATCH trivial] qemu-img: omit errno value in error message

[Michael Tokarev]

I'm getting io-qcow2-244 test failure on mips*
due to output mismatch:

  Take an internal snapshot:
 -qemu-img: Could not create snapshot 'test': -95 (Operation not supported)
 +qemu-img: Could not create snapshot 'test': -122 (Operation not supported)
  No errors were found on the image.

This is because errno values might be different across
different architectures.

This error message in qemu-img.c is the only one which
prints errno directly, all the rest print strerror(errno)
only.  Fix this error message and the expected output
of the 3 test cases too.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---
 qemu-img.c                 | 4 ++--
 tests/qemu-iotests/080.out | 6 +++---
 tests/qemu-iotests/112.out | 6 +++---
 tests/qemu-iotests/244.out | 2 +-
 4 files changed, 9 insertions(+), 9 deletions(-)

(there are a few other places in the code which also print errno,
mostly in vhost area, but let's deal with this one first)


diff --git a/qemu-img.c b/qemu-img.c
index 27f48051b0..0756dbb835 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -3468,8 +3468,8 @@ static int img_snapshot(int argc, char **argv)
 
         ret = bdrv_snapshot_create(bs, &sn);
         if (ret) {
-            error_report("Could not create snapshot '%s': %d (%s)",
-                snapshot_name, ret, strerror(-ret));
+            error_report("Could not create snapshot '%s': %s",
+                snapshot_name, strerror(-ret));
         }
         break;
 
diff --git a/tests/qemu-iotests/080.out b/tests/qemu-iotests/080.out
index 45ab01db8e..d8acb3e723 100644
--- a/tests/qemu-iotests/080.out
+++ b/tests/qemu-iotests/080.out
@@ -33,7 +33,7 @@ qemu-io: can't open device TEST_DIR/t.qcow2: Snapshot table 
offset invalid
 
 == Hitting snapshot table size limit ==
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
-qemu-img: Could not create snapshot 'test': -27 (File too large)
+qemu-img: Could not create snapshot 'test': File too large
 read 512/512 bytes at offset 0
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 
@@ -56,8 +56,8 @@ qemu-io: can't open device TEST_DIR/t.qcow2: Backing file 
name too long
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
 wrote 512/512 bytes at offset 0
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-qemu-img: Could not create snapshot 'test': -27 (File too large)
-qemu-img: Could not create snapshot 'test': -11 (Resource temporarily 
unavailable)
+qemu-img: Could not create snapshot 'test': File too large
+qemu-img: Could not create snapshot 'test': Resource temporarily unavailable
 
 == Invalid snapshot L1 table offset ==
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
diff --git a/tests/qemu-iotests/112.out b/tests/qemu-iotests/112.out
index dd3cc4383c..ebf426febc 100644
--- a/tests/qemu-iotests/112.out
+++ b/tests/qemu-iotests/112.out
@@ -32,7 +32,7 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
 refcount bits: 1
 wrote 512/512 bytes at offset 0
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-qemu-img: Could not create snapshot 'foo': -22 (Invalid argument)
+qemu-img: Could not create snapshot 'foo': Invalid argument
 Leaked cluster 6 refcount=1 reference=0
 
 1 leaked clusters were found on the image.
@@ -44,7 +44,7 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
 refcount bits: 2
 wrote 512/512 bytes at offset 0
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-qemu-img: Could not create snapshot 'baz': -22 (Invalid argument)
+qemu-img: Could not create snapshot 'baz': Invalid argument
 Leaked cluster 7 refcount=1 reference=0
 
 1 leaked clusters were found on the image.
@@ -75,7 +75,7 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
 refcount bits: 64
 wrote 512/512 bytes at offset 0
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-qemu-img: Could not create snapshot 'foo': -22 (Invalid argument)
+qemu-img: Could not create snapshot 'foo': Invalid argument
 Leaked cluster 5 refcount=18446744073709551615 reference=1
 Leaked cluster 6 refcount=1 reference=0
 
diff --git a/tests/qemu-iotests/244.out b/tests/qemu-iotests/244.out
index 5e03add054..4815a489b0 100644
--- a/tests/qemu-iotests/244.out
+++ b/tests/qemu-iotests/244.out
@@ -41,7 +41,7 @@ write failed: Operation not supported
 No errors were found on the image.
 
 Take an internal snapshot:
-qemu-img: Could not create snapshot 'test': -95 (Operation not supported)
+qemu-img: Could not create snapshot 'test': Operation not supported
 No errors were found on the image.
 
 === Standalone image with external data file (efficient) ===
-- 
2.39.2