tests: generate scno.h from syscallent.h for use by other tests

Provide scno.h with fallback definitions of all __NR_* constants known
to strace for the personbality being tested.

Some tests need just __NR_* constants without any kernel support.
Such tests can include "scno.h" after <asm/unistd.h> to get definitions
of these constants when system headers are too old.

* tests/generate_scno.c: New file.
* tests/.gitignore: Add generate_scno.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(scno.h): New rule.
(BUILT_SOURCES, CLEANFILES): Add scno.h.

tests/.gitignore

@@ -80,6 +80,7 @@ ftruncate
 ftruncate64
 futex
 futimesat
+generate_scno
 get_mempolicy
 getcpu
 getcwd

tests/Makefile.am

@@ -142,6 +142,7 @@ check_PROGRAMS = \
 	ftruncate64 \
 	futex \
 	futimesat \
+	generate_scno \
 	get_mempolicy \
 	getcpu \
 	getcwd \
@@ -914,5 +915,8 @@ ksysent.h: $(srcdir)/ksysent.sed
 	mv -f $@.t2 $@
 	rm -f $@.t1
 
-BUILT_SOURCES = ksysent.h
-CLEANFILES = ksysent.h $(TESTS:=.tmp)
+scno.h: generate_scno
+	./$< > $@-t && mv $@-t $@
+
+BUILT_SOURCES = ksysent.h scno.h
+CLEANFILES = ksysent.h scno.h $(TESTS:=.tmp)

tests/generate_scno.c

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "defs.h"
+#include "syscall.h"
+
+#define TD 0
+#define TF 0
+#define TI 0
+#define TN 0
+#define TP 0
+#define TS 0
+#define TM 0
+#define NF 0
+#define MA 0
+#define SI 0
+#define SE 0
+#define CST 0
+#define SEN(arg) 0,0
+
+static const struct_sysent syscallent[] = {
+#include "syscallent.h"
+};
+
+#undef syscall_bit
+#if defined __x86_64__ && defined __ILP32__ && defined __X32_SYSCALL_BIT
+# define syscall_bit __X32_SYSCALL_BIT
+#endif
+#ifndef syscall_bit
+# define syscall_bit 0
+#endif
+
+static char al_num[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_0123456789";
+
+int
+main(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(syscallent); ++i) {
+		const char *name = syscallent[i].sys_name;
+
+		if (!name || strspn(name, al_num) < strlen(name)
+#ifdef SYS_socket_nsubcalls
+		    || (i >= SYS_socket_subcall &&
+			i < SYS_socket_subcall + SYS_socket_nsubcalls)
+#endif
+#ifdef SYS_ipc_nsubcalls
+		    || (i >= SYS_ipc_subcall &&
+			i < SYS_ipc_subcall + SYS_ipc_nsubcalls)
+#endif
+#ifdef ARM_FIRST_SHUFFLED_SYSCALL
+		    || (i >= ARM_FIRST_SHUFFLED_SYSCALL &&
+			i <= ARM_FIRST_SHUFFLED_SYSCALL +
+			    ARM_LAST_SPECIAL_SYSCALL + 1)
+#endif
+		   )
+			continue;
+
+		printf("#ifndef __NR_%s\n# define __NR_%s %u\n#endif\n",
+		       name, name, syscall_bit + i);
+	}
+
+	return 0;
+}