test: add sigabbrev_np() for systems where it's not available

sigabbrev_np() was first added to glibc 2.32 (Aug 2020) which is too recent
for some of the distributions we support.

config.h.meson

@@ -474,6 +474,7 @@
 #mesondefine HAVE_DECL_STRSIGNAL
 #mesondefine HAVE_MEMFD_CREATE
 #mesondefine HAVE_GETRANDOM
+#mesondefine HAVE_SIGABBREV_NP
 
 #mesondefine PIPEWIRE_VERSION_MAJOR
 #mesondefine PIPEWIRE_VERSION_MINOR

meson.build

@@ -278,6 +278,10 @@ if cc.has_function('getrandom', prefix : '#include <sys/random.h>', args : [ '-D
   cdata.set('HAVE_GETRANDOM', 1)
 endif
 
+if cc.has_function('sigabbrev_np', prefix : '#include <string.h>', args : [ '-D_GNU_SOURCE' ])
+  cdata.set('HAVE_SIGABBREV_NP', 1)
+endif
+
 systemd = dependency('systemd', required: get_option('systemd'))
 systemd_dep = dependency('libsystemd',required: get_option('systemd'))
 if systemd.found() and systemd_dep.found()

test/meson.build

@@ -2,6 +2,7 @@ pwtest_sources = [
   'pwtest.h',
   'pwtest-implementation.h',
   'pwtest.c',
+  'pwtest-compat.c',
 ]
 
 pwtest_deps = [
@@ -30,6 +31,13 @@ pwtest_lib = static_library(
   include_directories: pwtest_inc,
 )
 
+test('test pwtest',
+    executable('test-pwtest',
+               'test-pwtest.c',
+               include_directories: pwtest_inc,
+               link_with: pwtest_lib)
+)
+
 # Compilation only, this is the example file for how pwtest works and most
 # of its tests will fail.
 executable('test-example',

test/pwtest-compat.c

@@ -0,0 +1,55 @@
+/* PipeWire
+ *
+ * Copyright © 2021 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "config.h"
+
+#if !HAVE_SIGABBREV_NP
+#include <stddef.h>
+#include <signal.h>
+
+/* glibc >= 2.32 */
+static inline const char *sigabbrev_np(int sig)
+{
+#define SIGABBREV(a_) case SIG##a_: return #a_
+	switch(sig) {
+	SIGABBREV(INT);
+	SIGABBREV(ABRT);
+	SIGABBREV(BUS);
+	SIGABBREV(SEGV);
+	SIGABBREV(ALRM);
+	SIGABBREV(CHLD);
+	SIGABBREV(HUP);
+	SIGABBREV(PIPE);
+	SIGABBREV(CONT);
+	SIGABBREV(STOP);
+	SIGABBREV(ILL);
+	SIGABBREV(KILL);
+	SIGABBREV(TERM);
+	}
+#undef SIGABBREV
+
+	return NULL;
+}
+
+#endif /* HAVE_SIGABBREV_NP */

test/pwtest.c

@@ -59,6 +59,8 @@
 
 #include "pwtest.h"
 
+#include "pwtest-compat.c"
+
 #define pwtest_log(...) dprintf(testlog_fd, __VA_ARGS__)
 #define pwtest_vlog(format_, args_) vdprintf(testlog_fd, format_, args_)
 

test/test-pwtest.c

@@ -0,0 +1,55 @@
+/* PipeWire
+ *
+ * Copyright © 2021 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "config.h"
+
+#include "pwtest.h"
+
+#include <signal.h>
+
+#include "pwtest-compat.c"
+
+PWTEST(compat_sigabbrev_np)
+{
+#if !HAVE_SIGABBREV_NP
+	pwtest_str_eq(sigabbrev_np(SIGABRT), "ABRT");
+	pwtest_str_eq(sigabbrev_np(SIGSEGV), "SEGV");
+	pwtest_str_eq(sigabbrev_np(SIGSTOP), "STOP");
+	pwtest_str_eq(sigabbrev_np(SIGCHLD), "CHLD");
+	pwtest_str_eq(sigabbrev_np(SIGTERM), "TERM");
+	pwtest_str_eq(sigabbrev_np(SIGKILL), "KILL");
+	pwtest_str_eq(sigabbrev_np(12345), NULL);
+
+	return PWTEST_PASS;
+#else
+	return PWTEST_SKIP;
+#endif
+}
+
+PWTEST_SUITE(pwtest)
+{
+	pwtest_add(compat_sigabbrev_np, PWTEST_NOARG);
+
+	return PWTEST_PASS;
+}