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https://github.com/jart/cosmopolitan.git
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a6baba1b07
The WIN32 CreateProcess() function does not require an .exe or .com suffix in order to spawn an executable. Now that we have Cosmo bash we're no longer so dependent on the cmd.exe prompt.
106 lines
4.6 KiB
C
106 lines
4.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2023 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include <assert.h>
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#include <errno.h>
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#include <signal.h>
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#include <spawn.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/resource.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <ucontext.h>
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#include <unistd.h>
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// clang-format off
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// sh -c 'build/bootstrap/make -j8 V=1 o//test/posix/sigchld_test.runs'
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// clang-format on
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void Assert(const char *file, int line, bool ok) {
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sigset_t ss;
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if (!ok) {
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sigfillset(&ss);
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sigprocmask(SIG_BLOCK, &ss, 0);
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fprintf(stderr, "%s:%d: assertion failed\n", file, line);
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_exit(1);
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}
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}
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#define FL __FILE__, __LINE__
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#define ASSERT_TRUE(got) Assert(FL, got)
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#define EXPECT_TRUE(got) Assert(FL, got)
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#define EXPECT_EQ(want, got) Assert(FL, (want) == (got))
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#define ASSERT_EQ(want, got) Assert(FL, (want) == (got))
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#define EXPECT_NE(donotwant, got) Assert(FL, (donotwant) != (got))
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#define ASSERT_SYS(err, want, got) \
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errno = 0, Assert(FL, (want) == (got)), Assert(FL, (err) == errno)
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#define EXPECT_SYS(err, want, got) \
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errno = 0, Assert(FL, (want) == (got)), Assert(FL, (err) == errno)
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int sigchld_pid;
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volatile bool sigchld_got_signal;
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// 1. Test SIGCHLD is delivered due to lack of waiters.
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// 2. Test wait4() returns ECHILD when nothing remains.
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// 3. Test wait4() failing doesn't clobber *ws and *ru.
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// 4. Check information passed in siginfo and ucontext.
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void OnSigchld(int sig, siginfo_t *si, void *arg) {
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int ws;
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struct rusage ru;
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ucontext_t *ctx = arg;
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EXPECT_NE(-1, wait4(sigchld_pid, &ws, 0, &ru));
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EXPECT_SYS(ECHILD, -1, wait4(sigchld_pid, &ws, 0, &ru));
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EXPECT_TRUE(WIFEXITED(ws));
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EXPECT_EQ(42, WEXITSTATUS(ws));
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EXPECT_EQ(SIGCHLD, sig);
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EXPECT_EQ(SIGCHLD, si->si_signo);
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// these fields aren't very portable
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// EXPECT_EQ(CLD_EXITED, si->si_code);
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// EXPECT_EQ(sigchld_pid, si->si_pid);
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// EXPECT_EQ(getuid(), si->si_uid);
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EXPECT_NE(NULL, ctx);
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sigchld_got_signal = true;
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}
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int main(int argc, char *argv[]) {
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const char *startup = getenv("EXITCODE");
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if (startup) exit(atoi(startup));
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struct sigaction newsa, oldsa;
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sigset_t oldmask, blocksigchld, unblockall;
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char *prog = argv[0];
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char *args[] = {prog, NULL};
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char *envs[] = {"EXITCODE=42", NULL};
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newsa.sa_flags = SA_SIGINFO;
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newsa.sa_sigaction = OnSigchld;
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sigemptyset(&newsa.sa_mask);
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ASSERT_SYS(0, 0, sigaction(SIGCHLD, &newsa, &oldsa));
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sigemptyset(&blocksigchld);
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sigaddset(&blocksigchld, SIGCHLD);
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ASSERT_SYS(0, 0, sigprocmask(SIG_BLOCK, &blocksigchld, &oldmask));
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EXPECT_EQ(0, posix_spawn(&sigchld_pid, prog, NULL, NULL, args, envs));
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sigemptyset(&unblockall);
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EXPECT_SYS(EINTR, -1, sigsuspend(&unblockall));
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EXPECT_TRUE(sigchld_got_signal);
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EXPECT_SYS(0, 0, sigaction(SIGCHLD, &oldsa, 0));
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ASSERT_SYS(0, 0, sigprocmask(SIG_SETMASK, &oldmask, 0));
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}
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