tests: add epoll_ctl.test

* tests/epoll_ctl.c: New file.
* tests/epoll_ctl.test: New test.
* tests/.gitignore: Add epoll_ctl.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add epoll_ctl.test.

tests/.gitignore

@@ -27,6 +27,7 @@ dup2
 dup3
 epoll_create
 epoll_create1
+epoll_ctl
 eventfd
 execve
 execve-v

tests/Makefile.am

@@ -78,6 +78,7 @@ check_PROGRAMS = \
 	dup3 \
 	epoll_create \
 	epoll_create1 \
+	epoll_ctl \
 	eventfd \
 	execve \
 	execve-v \
@@ -278,6 +279,7 @@ DECODER_TESTS = \
 	dup3.test \
 	epoll_create.test \
 	epoll_create1.test \
+	epoll_ctl.test \
 	eventfd.test \
 	execve.test \
 	execve-v.test \

tests/epoll_ctl.c

@@ -0,0 +1,32 @@
+#include "tests.h"
+#include <sys/syscall.h>
+
+#if defined __NR_epoll_ctl && defined HAVE_SYS_EPOLL_H
+
+# include <errno.h>
+# include <inttypes.h>
+# include <stdio.h>
+# include <sys/epoll.h>
+# include <unistd.h>
+
+int
+main(void)
+{
+	struct epoll_event *const ev = tail_alloc(sizeof(*ev));
+	ev->events = EPOLLIN;
+
+	int rc = syscall(__NR_epoll_ctl, -1, EPOLL_CTL_ADD, -2, ev);
+	printf("epoll_ctl(-1, EPOLL_CTL_ADD, -2, {EPOLLIN,"
+	       " {u32=%u, u64=%" PRIu64 "}}) = %d %s (%m)\n",
+	       ev->data.u32, ev->data.u64, rc,
+	       errno == ENOSYS ? "ENOSYS" : "EBADF");
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_epoll_ctl && HAVE_SYS_EPOLL_H")
+
+#endif

tests/epoll_ctl.test

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Check epoll_ctl syscall decoding.
+
+. "${srcdir=.}/init.sh"
+run_strace_match_diff