1 | /*
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2 | =============================================================================
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3 | fcntl.h -- file control function header
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4 | Version 3 -- 1987-06-26 -- D.N. Lynx Crowe
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5 | =============================================================================
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6 | */
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7 |
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8 | #pragma once
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9 |
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10 | /*
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11 | =============================================================================
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12 | The following symbols are used with open(), creat() and fcntl().
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13 | The first 3 can only be set by open().
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14 | =============================================================================
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15 | */
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16 |
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17 | #define O_RDONLY 0x0000 /* Read-only value */
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18 | #define O_WRONLY 0x0001 /* Write-only value */
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19 | #define O_RDWR 0x0002 /* Read-write value */
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20 |
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21 | #define O_NDELAY 0x0004 /* Non-blocking I/O flag */
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22 | #define O_APPEND 0x0008 /* Append mode flag (write only at end) */
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23 |
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24 | #define O_CREAT 0x0100 /* File creation flag (uses 3rd argument) */
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25 | #define O_TRUNC 0x0200 /* File truncation flag */
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26 | #define O_EXCL 0x0400 /* Exclusive access flag */
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27 |
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28 | #define O_RAW 0x8000 /* Raw (binary) I/O flag for getc and putc */
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29 |
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30 | /*
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31 | =============================================================================
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32 | The following symbols define requests used with the fcntl() function.
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33 | =============================================================================
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34 | */
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35 |
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36 | #define F_DUPFD 0 /* Duplicate file descriptor */
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37 |
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38 | #define F_GETFD 1 /* Get file descriptor flags */
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39 | #define F_SETFD 2 /* Set file descriptor flags */
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40 |
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41 | #define F_GETFL 3 /* Get file flags */
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42 | #define F_SETFL 4 /* Set file flags */
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