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1 // Copyright 2019 The Go Authors. All rights reserved.
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2 // Use of this source code is governed by a BSD-style
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3 // license that can be found in the LICENSE file.
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4
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5 package unix
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6
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7 import "unsafe"
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8
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9 // FcntlInt performs a fcntl syscall on fd with the provided command and argument.
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10 func FcntlInt(fd uintptr, cmd, arg int) (int, error) {
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11 return fcntl(int(fd), cmd, arg)
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12 }
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13
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14 // FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command.
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15 func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error {
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16 _, err := fcntl(int(fd), cmd, int(uintptr(unsafe.Pointer(lk))))
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17 return err
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18 }
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19
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20 // FcntlFstore performs a fcntl syscall for the F_PREALLOCATE command.
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21 func FcntlFstore(fd uintptr, cmd int, fstore *Fstore_t) error {
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22 _, err := fcntl(int(fd), cmd, int(uintptr(unsafe.Pointer(fstore))))
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23 return err
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24 }
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