fuse3: Fix ptest for the new test runner

libfuse 3.18.3 replaced its pytest based tests with shell test cases
driven by test/run-tests.py, so the pytest based run-ptest collected no
tests at all.

- Run test/run-tests.py from run-ptest and turn its result lines into
  ptest PASS/FAIL/SKIP lines. Use a run directory under the canonical
  /tmp, since some test filesystems mirror the real tree and cannot
  follow the /var/tmp symlink.
- Install fuse_config.h, which the runner reads from the build tree.
- Replace the pytest dependencies with the python3 modules the runner
  uses, and add coreutils and util-linux-losetup for dd status=none and
  losetup --show, which busybox does not support.
- Do not print strerror(0) in test_syscalls, musl's "No error
  information" is flagged as suspicious output by the runner.

All 87 tests now run on qemux86-64 musl: 80 pass, 7 skip.

AI-Generated: Uses Claude Code
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-oe/recipes-support/fuse/fuse3/0001-test_syscalls-Do-not-print-strerror-0.patch

@@ -0,0 +1,36 @@
+From 75186b0a019645a2822c9d567464bb142cc8882a Mon Sep 17 00:00:00 2001
+From: Khem Raj <khem.raj@oss.qualcomm.com>
+Date: Thu, 1 Oct 2026 10:42:51 -0700
+Subject: [PATCH] test_syscalls: Do not print strerror(0)
+
+test_open_acc() prints strerror() of the expected error, which is 0 for
+the cases that should succeed. glibc returns "Success" for it, but musl
+returns "No error information", and run-tests.py treats the word "error"
+in the output as a failure:
+
+  FAIL  examples/passthrough-base  suspicious output: script.out: ... 49 [open_acc(O_RDONLY) mode: 0600 message: 'No error information'] START
+
+Print "Success" when no error is expected.
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>
+---
+ test/test_syscalls.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/test/test_syscalls.c b/test/test_syscalls.c
+index 115eab8..f849e7b 100644
+--- a/test/test_syscalls.c
++++ b/test/test_syscalls.c
+@@ -1335,8 +1335,10 @@ static int do_test_open_acc(int flags, const char *flags_str, int mode, int err)
+ 	int res;
+ 	int fd;
+ 
++	/* strerror(0) is "Success" on glibc but "No error information" on
++	 * musl, which the test runner flags as a suspicious word. */
+ 	start_test("open_acc(%s) mode: 0%03o message: '%s'", flags_str, mode,
+-		   strerror(err));
++		   err ? strerror(err) : "Success");
+ 	unlink(testfile);
+ 	res = create_testfile(testfile, data, datalen);
+ 	if (res == -1)

meta-oe/recipes-support/fuse/fuse3/run-ptest

@@ -1,3 +1,23 @@
 #!/bin/sh
 
-pytest -o log_cli=true -o log_cli_level=INFO | sed -e 's/\[...%\]//g'| sed -e 's/PASSED/PASS/g'| sed -e 's/FAILED/FAIL/g'|sed -e 's/SKIPPED/SKIP/g'| awk '{if ($NF=="PASS" || $NF=="FAIL" || $NF=="SKIP" || $NF=="XFAIL" || $NF=="XPASS"){printf "%s: %s\n", $NF, $0}else{print}}'| awk '{if ($NF=="PASS" || $NF=="FAIL" || $NF=="SKIP" || $NF=="XFAIL" || $NF=="XPASS") {$NF="";print $0}else{print}}'
+# Run the libfuse test suite. The ptest directory mirrors the meson build
+# tree (example/, test/, util/, fuse_config.h) that test/run-tests.py expects.
+# Each finished test is reported as
+#   +   1.234s PASS  notify/prune                       0.12s
+# so print it as is and add the ptest result line after it.
+cd "$(dirname "$0")"
+
+# Some test filesystems mirror the real tree but cannot follow symlinks, so
+# keep the run directory off paths like /var/tmp, which is a symlink to
+# volatile/tmp. run-tests.py creates the directory and removes it when done.
+run_dir="$(readlink -f /tmp)/fuse-tests-$$"
+
+python3 test/run-tests.py --build-dir "$(pwd)" --run-dir "$run_dir" 2>&1 | awk '
+{ print }
+/^\+ *[0-9.]+s +(PASS|FAIL|SKIP) / {
+	line = $0
+	sub(/^\+ *[0-9.]+s +/, "", line)
+	split(line, f, " ")
+	printf "%s: %s\n", f[1], f[2]
+	fflush()
+}'

meta-oe/recipes-support/fuse/fuse3_3.18.3.bb

@@ -31,14 +31,25 @@ LDFLAGS:append:toolchain-clang:riscv32 = " -latomic"
 SRC_URI += " \
     file://run-ptest \
     file://fuse3.conf \
+    file://0001-test_syscalls-Do-not-print-strerror-0.patch \
 "
-#python3-compile for filecmp module
+# test/run-tests.py needs python3-asyncio for concurrent.futures,
+# python3-compile for filecmp, python3-io for socket/tempfile and
+# python3-shell for shlex. The test cases use dd status=none and
+# losetup --show, which busybox does not support.
 RDEPENDS:${PN}-ptest += " \
+    python3-asyncio \
     python3-compile \
-    python3-pytest \
-    python3-looseversion \
+    python3-core \
+    python3-ctypes \
+    python3-io \
+    python3-json \
+    python3-resource \
+    python3-shell \
     bash \
+    coreutils \
     file \
+    util-linux-losetup \
 "
 RRECOMMENDS:${PN}-ptest += " kernel-module-cuse"
 
@@ -66,6 +77,9 @@ do_install_ptest() {
     do
         cp -rf $e  ${D}${PTEST_PATH}/test
     done
+
+    # test/run-tests.py reads the build configuration from the build tree
+    install -m 0644 ${B}/fuse_config.h ${D}${PTEST_PATH}/
 }
 
 DEPENDS = "udev"