Ophestra
aab806a6f9
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The mutex is not really doing anything, none of these methods make sense when called concurrently anyway. The copylocks analysis is still satisfied by the noCopy struct. Signed-off-by: Ophestra <cat@gensokyo.uk>
47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
package system
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import (
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"fmt"
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"os"
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)
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// Link appends [HardlinkOp] to [I] the [Process] criteria.
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func (sys *I) Link(oldname, newname string) *I { return sys.LinkFileType(Process, oldname, newname) }
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// LinkFileType appends [HardlinkOp] to [I].
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func (sys *I) LinkFileType(et Enablement, oldname, newname string) *I {
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sys.ops = append(sys.ops, &HardlinkOp{et, newname, oldname})
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return sys
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}
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// HardlinkOp maintains a hardlink until its [Enablement] is no longer satisfied.
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type HardlinkOp struct {
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et Enablement
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dst, src string
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}
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func (l *HardlinkOp) Type() Enablement { return l.et }
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func (l *HardlinkOp) apply(*I) error {
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msg.Verbose("linking", l)
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return newOpError("hardlink", os.Link(l.src, l.dst), false)
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}
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func (l *HardlinkOp) revert(_ *I, ec *Criteria) error {
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if ec.hasType(l) {
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msg.Verbosef("removing hard link %q", l.dst)
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return newOpError("hardlink", os.Remove(l.dst), true)
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} else {
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msg.Verbosef("skipping hard link %q", l.dst)
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return nil
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}
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}
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func (l *HardlinkOp) Is(o Op) bool {
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target, ok := o.(*HardlinkOp)
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return ok && l != nil && target != nil && *l == *target
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}
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func (l *HardlinkOp) Path() string { return l.src }
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func (l *HardlinkOp) String() string { return fmt.Sprintf("%q from %q", l.dst, l.src) }
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