mirror of
https://github.com/jart/cosmopolitan.git
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51 lines
2.7 KiB
C
51 lines
2.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 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 "libc/calls/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/state.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/testlib/testlib.h"
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#define PATH "o/vfork_test"
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TEST(vfork, test) {
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int fd;
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char buf[8] = {0};
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mkdir("o", 0755);
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ASSERT_NE(-1, (fd = open(PATH, O_RDWR | O_CREAT, 0644)));
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ASSERT_EQ(5, write(fd, "hello", 5));
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ASSERT_NE(-1, lseek(fd, 0, SEEK_SET));
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if (!vfork()) {
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EXPECT_EQ(5, pread(fd, buf, 5, 0));
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/*
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* TODO(jart): DOES PREAD IN CHILD REALLY CHANGE PARENT HANDLE POSITION?
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*/
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ASSERT_NE(-1, lseek(fd, 0, SEEK_SET));
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EXPECT_STREQ("hello", buf);
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EXPECT_NE(-1, close(fd));
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_exit(0);
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}
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EXPECT_EQ(0, __vforked);
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EXPECT_NE(-1, wait(0));
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EXPECT_EQ(5, read(fd, buf, 5));
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EXPECT_STREQ("hello", buf);
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EXPECT_NE(-1, close(fd));
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unlink(PATH);
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}
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