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47 lines
2.6 KiB
C
47 lines
2.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net 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 "libc/calls/calls.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sysv/consts/map.h"
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#include "libc/sysv/consts/msync.h"
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#include "libc/sysv/consts/prot.h"
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#include "libc/testlib/testlib.h"
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TEST(msync, changeFileMappingAndExit) {
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int ws;
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char byte;
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char *map;
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ASSERT_SYS(0, 3, tmpfd());
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ASSERT_SYS(0, 0, ftruncate(3, 4));
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ASSERT_NE(MAP_FAILED,
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(map = mmap(0, 4, PROT_READ | PROT_WRITE, MAP_SHARED, 3, 0)));
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if (!fork()) {
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map[0] = 1;
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ASSERT_SYS(0, 0, msync(map, 4, MS_SYNC));
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_Exit(123);
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}
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ASSERT_NE(-1, wait(&ws));
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ASSERT_TRUE(WIFEXITED(ws));
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ASSERT_EQ(123, WEXITSTATUS(ws));
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ASSERT_SYS(0, 1, pread(3, &byte, 1, 0));
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ASSERT_EQ(1, byte);
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ASSERT_EQ(1, map[0]);
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ASSERT_SYS(0, 0, munmap(map, 4));
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ASSERT_SYS(0, 0, close(3));
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}
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