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unix: add IoctlSetString on all platforms

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Currently, only solaris provides IoctlSetString. However, it might be
useful on other platforms too, e.g. for SIOCBRADDBR on linux.

Change-Id: I19ed47a3e4ed0180ba6777bc193e32bfb61c0506
Reviewed-on: https://go-review.googlesource.com/c/sys/+/720200
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Florian Lehner <lehner.florian86@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Tobias Klauser
2026-01-14 11:54:12 +01:00
committed by Gopher Robot
parent 6fb913b30f
commit d25a7aaff8
3 changed files with 16 additions and 14 deletions
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11
unix/ioctl_signed.go
View File

@@ -6,9 +6,7 @@
package unix package unix
import ( import "unsafe"
"unsafe"
)
// ioctl itself should not be exposed directly, but additional get/set // ioctl itself should not be exposed directly, but additional get/set
// functions for specific types are permissible. // functions for specific types are permissible.
@@ -28,6 +26,13 @@ func IoctlSetPointerInt(fd int, req int, value int) error {
return ioctlPtr(fd, req, unsafe.Pointer(&v)) return ioctlPtr(fd, req, unsafe.Pointer(&v))
} }
// IoctlSetString performs an ioctl operation which sets a string value
// on fd, using the specified request number.
func IoctlSetString(fd int, req int, value string) error {
bs := append([]byte(value), 0)
return ioctlPtr(fd, req, unsafe.Pointer(&bs[0]))
}
// IoctlSetWinsize performs an ioctl on fd with a *Winsize argument. // IoctlSetWinsize performs an ioctl on fd with a *Winsize argument.
// //
// To change fd's window size, the req argument should be TIOCSWINSZ. // To change fd's window size, the req argument should be TIOCSWINSZ.

11
unix/ioctl_unsigned.go
View File

@@ -6,9 +6,7 @@
package unix package unix
import ( import "unsafe"
"unsafe"
)
// ioctl itself should not be exposed directly, but additional get/set // ioctl itself should not be exposed directly, but additional get/set
// functions for specific types are permissible. // functions for specific types are permissible.
@@ -28,6 +26,13 @@ func IoctlSetPointerInt(fd int, req uint, value int) error {
return ioctlPtr(fd, req, unsafe.Pointer(&v)) return ioctlPtr(fd, req, unsafe.Pointer(&v))
} }
// IoctlSetString performs an ioctl operation which sets a string value
// on fd, using the specified request number.
func IoctlSetString(fd int, req uint, value string) error {
bs := append([]byte(value), 0)
return ioctlPtr(fd, req, unsafe.Pointer(&bs[0]))
}
// IoctlSetWinsize performs an ioctl on fd with a *Winsize argument. // IoctlSetWinsize performs an ioctl on fd with a *Winsize argument.
// //
// To change fd's window size, the req argument should be TIOCSWINSZ. // To change fd's window size, the req argument should be TIOCSWINSZ.

8
unix/syscall_solaris.go
View File

@@ -1052,14 +1052,6 @@ func IoctlSetIntRetInt(fd int, req int, arg int) (int, error) {
return ioctlRet(fd, req, uintptr(arg)) return ioctlRet(fd, req, uintptr(arg))
} }
func IoctlSetString(fd int, req int, val string) error {
bs := make([]byte, len(val)+1)
copy(bs[:len(bs)-1], val)
err := ioctlPtr(fd, req, unsafe.Pointer(&bs[0]))
runtime.KeepAlive(&bs[0])
return err
}
// Lifreq Helpers // Lifreq Helpers
func (l *Lifreq) SetName(name string) error { func (l *Lifreq) SetName(name string) error {