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33 lines
778 B
33 lines
778 B
package pty |
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import ( |
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"os" |
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"syscall" |
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"unsafe" |
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) |
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func open() (pty, tty *os.File, err error) { |
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/* |
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* from ptm(4): |
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* The PTMGET command allocates a free pseudo terminal, changes its |
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* ownership to the caller, revokes the access privileges for all previous |
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* users, opens the file descriptors for the master and slave devices and |
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* returns them to the caller in struct ptmget. |
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*/ |
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p, err := os.OpenFile("/dev/ptm", os.O_RDWR|syscall.O_CLOEXEC, 0) |
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if err != nil { |
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return nil, nil, err |
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} |
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defer p.Close() |
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var ptm ptmget |
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if err := ioctl(p.Fd(), uintptr(ioctl_PTMGET), uintptr(unsafe.Pointer(&ptm))); err != nil { |
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return nil, nil, err |
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} |
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pty = os.NewFile(uintptr(ptm.Cfd), "/dev/ptm") |
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tty = os.NewFile(uintptr(ptm.Sfd), "/dev/ptm") |
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return pty, tty, nil |
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}
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