| 1 | #include <fcntl.h>
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| 2 | #include <stdio.h>
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| 3 | #include <stdlib.h>
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| 4 | #include <unistd.h>
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| 5 | #include <errno.h>
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| 6 |
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| 7 | #include <sys/file.h>
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| 8 |
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| 9 | int
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| 10 | main (int argc, char *argv[])
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| 11 | {
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| 12 | int fd;
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| 13 | const char *file = "test-flock.txt";
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| 14 | int ret;
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| 15 |
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| 16 | /* Open a non-empty file for testing. */
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| 17 | fd = open (file, O_RDWR | O_CREAT | O_TRUNC, 0644);
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| 18 | if (!(fd >= 0))
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| 19 | exit (1);
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| 20 | if (!(write (fd, "hello", 5) == 5))
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| 21 | exit (2);
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| 22 |
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| 23 | /* Some impossible operation codes which should never be accepted. */
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| 24 | ret = flock (fd, LOCK_SH | LOCK_EX);
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| 25 | printf ("%d %d\n", ret, errno);
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| 26 |
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| 27 | return 0;
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| 28 | }
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