--- /dev/null
+/*
+ * Check decoding of waitid syscall.
+ *
+ * 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 "tests.h"
+#include <assert.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/wait.h>
+#include <sys/resource.h>
+#include <sys/syscall.h>
+
+static const char *
+sprint_rusage(const struct rusage *const ru)
+{
+ static char buf[1024];
+ snprintf(buf, sizeof(buf),
+ "{ru_utime={%llu, %llu}"
+ ", ru_stime={%llu, %llu}"
+#ifdef VERBOSE_RUSAGE
+ ", ru_maxrss=%llu"
+ ", ru_ixrss=%llu"
+ ", ru_idrss=%llu"
+ ", ru_isrss=%llu"
+ ", ru_minflt=%llu"
+ ", ru_majflt=%llu"
+ ", ru_nswap=%llu"
+ ", ru_inblock=%llu"
+ ", ru_oublock=%llu"
+ ", ru_msgsnd=%llu"
+ ", ru_msgrcv=%llu"
+ ", ru_nsignals=%llu"
+ ", ru_nvcsw=%llu"
+ ", ru_nivcsw=%llu}"
+#else
+ ", ...}"
+#endif
+ , widen_to_ull(ru->ru_utime.tv_sec)
+ , widen_to_ull(ru->ru_utime.tv_usec)
+ , widen_to_ull(ru->ru_stime.tv_sec)
+ , widen_to_ull(ru->ru_stime.tv_usec)
+#ifdef VERBOSE_RUSAGE
+ , widen_to_ull(ru->ru_maxrss)
+ , widen_to_ull(ru->ru_ixrss)
+ , widen_to_ull(ru->ru_idrss)
+ , widen_to_ull(ru->ru_isrss)
+ , widen_to_ull(ru->ru_minflt)
+ , widen_to_ull(ru->ru_majflt)
+ , widen_to_ull(ru->ru_nswap)
+ , widen_to_ull(ru->ru_inblock)
+ , widen_to_ull(ru->ru_oublock)
+ , widen_to_ull(ru->ru_msgsnd)
+ , widen_to_ull(ru->ru_msgrcv)
+ , widen_to_ull(ru->ru_nsignals)
+ , widen_to_ull(ru->ru_nvcsw)
+ , widen_to_ull(ru->ru_nivcsw)
+#endif
+ );
+ return buf;
+}
+
+#define CASE(x) case x: return #x
+
+static const char *
+si_code_2_name(const int code)
+{
+ switch (code) {
+#ifdef CLD_EXITED
+ CASE(CLD_EXITED);
+#endif
+#ifdef CLD_KILLED
+ CASE(CLD_KILLED);
+#endif
+#ifdef CLD_DUMPED
+ CASE(CLD_DUMPED);
+#endif
+#ifdef CLD_TRAPPED
+ CASE(CLD_TRAPPED);
+#endif
+#ifdef CLD_STOPPED
+ CASE(CLD_STOPPED);
+#endif
+#ifdef CLD_CONTINUED
+ CASE(CLD_CONTINUED);
+#endif
+ default: perror_msg_and_fail("unknown si_code %d", code);
+ }
+}
+
+static const char *
+sprint_siginfo(const siginfo_t *const si, const char *const status_text)
+{
+ static char buf[1024];
+ snprintf(buf, sizeof(buf),
+ "{si_signo=SIGCHLD"
+ ", si_code=%s"
+ ", si_pid=%u"
+ ", si_uid=%u"
+ ", si_status=%s"
+ ", si_utime=%llu"
+ ", si_stime=%llu}",
+ si_code_2_name(si->si_code),
+ si->si_pid,
+ si->si_uid,
+ status_text,
+ widen_to_ull(si->si_utime),
+ widen_to_ull(si->si_stime));
+ return buf;
+}
+
+static unsigned long
+poison(unsigned int v)
+{
+ return (unsigned long) 0xfacefeed00000000 | v;
+}
+
+static long
+do_waitid(const unsigned int idtype,
+ const unsigned int id,
+ const siginfo_t const *infop,
+ const unsigned int options,
+ const struct rusage *const rusage)
+{
+ sigset_t mask = {};
+ sigaddset(&mask, SIGCHLD);
+
+ assert(sigprocmask(SIG_BLOCK, &mask, NULL) == 0);
+ long rc = syscall(__NR_waitid, poison(idtype), poison(id),
+ infop, poison(options), rusage);
+ assert(sigprocmask(SIG_UNBLOCK, &mask, NULL) == 0);
+ return rc;
+}
+
+int
+main(void)
+{
+ tprintf("%s", "");
+
+ int fds[2];
+ if (pipe(fds))
+ perror_msg_and_fail("pipe");
+
+ pid_t pid;
+ pid = fork();
+ if (pid < 0)
+ perror_msg_and_fail("fork");
+
+ if (!pid) {
+ char c;
+ (void) close(1);
+ assert(read(0, &c, sizeof(c)) == 1);
+ return 42;
+ }
+
+ (void) close(0);
+
+ if (do_waitid(P_PID, pid, 0, WNOHANG|WEXITED, 0))
+ perror_msg_and_fail("waitid #1");
+ tprintf("waitid(P_PID, %d, NULL, WNOHANG|WEXITED, NULL) = 0\n", pid);
+
+ siginfo_t *const sinfo = tail_alloc(sizeof(*sinfo));
+ memset(sinfo, 0, sizeof(*sinfo));
+ struct rusage *const rusage = tail_alloc(sizeof(*rusage));
+ if (do_waitid(P_PID, pid, sinfo, WNOHANG|WEXITED|WSTOPPED, rusage))
+ perror_msg_and_fail("waitid #2");
+ tprintf("waitid(P_PID, %d, {}, WNOHANG|WEXITED|WSTOPPED, %s) = 0\n",
+ pid, sprint_rusage(rusage));
+
+ assert(write(1, "", 1) == 1);
+ (void) close(1);
+
+ if (do_waitid(P_PID, pid, sinfo, WEXITED, rusage))
+ perror_msg_and_fail("waitid #3");
+ tprintf("waitid(P_PID, %d, %s, WEXITED, %s) = 0\n",
+ pid, sprint_siginfo(sinfo, "42"), sprint_rusage(rusage));
+
+ pid = fork();
+ if (pid < 0)
+ perror_msg_and_fail("fork");
+
+ if (!pid) {
+ (void) raise(SIGUSR1);
+ return 1;
+ }
+
+ if (do_waitid(P_PID, pid, sinfo, WEXITED, rusage))
+ perror_msg_and_fail("waitid #4");
+ tprintf("waitid(P_PID, %d, %s, WEXITED, %s) = 0\n",
+ pid, sprint_siginfo(sinfo, "SIGUSR1"), sprint_rusage(rusage));
+
+ if (pipe(fds))
+ perror_msg_and_fail("pipe");
+ pid = fork();
+ if (pid < 0)
+ perror_msg_and_fail("fork");
+
+ if (!pid) {
+ (void) close(1);
+ raise(SIGSTOP);
+ char c;
+ assert(read(0, &c, sizeof(c)) == 1);
+ return 0;
+ }
+
+ (void) close(0);
+
+ if (do_waitid(P_PID, pid, sinfo, WSTOPPED, rusage))
+ perror_msg_and_fail("waitid #5");
+ tprintf("waitid(P_PID, %d, %s, WSTOPPED, %s) = 0\n",
+ pid, sprint_siginfo(sinfo, "SIGSTOP"), sprint_rusage(rusage));
+
+ if (kill(pid, SIGCONT))
+ perror_msg_and_fail("kill(SIGCONT)");
+
+#if defined WCONTINUED
+ if (do_waitid(P_PID, pid, sinfo, WCONTINUED, rusage))
+ perror_msg_and_fail("waitid #6");
+ tprintf("waitid(P_PID, %d, %s, WCONTINUED, %s) = 0\n",
+ pid, sprint_siginfo(sinfo, "SIGCONT"), sprint_rusage(rusage));
+#endif /* WCONTINUED */
+
+ assert(write(1, "", 1) == 1);
+ (void) close(1);
+
+ if (do_waitid(P_PID, pid, sinfo, WEXITED, rusage))
+ perror_msg_and_fail("waitid #7");
+ tprintf("waitid(P_PID, %d, %s, WEXITED, %s) = 0\n",
+ pid, sprint_siginfo(sinfo, "0"), sprint_rusage(rusage));
+
+ long rc = do_waitid(P_ALL, -1, sinfo, WEXITED|WSTOPPED, rusage);
+ tprintf("waitid(P_ALL, -1, %p, WEXITED|WSTOPPED, %p)"
+ " = %ld %s (%m)\n", sinfo, rusage, rc, errno2name());
+
+ tprintf("%s\n", "+++ exited with 0 +++");
+ return 0;
+}
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