209 Commits (4451a7c3643bc7375b26f6f00952131f5fb64446)

Author	SHA1	Message	Date
Josh Bleecher Snyder	618376dbc0	util/codegen: add AssertStructUnchanged ... Refactored out from cmd/cloner. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Josh Bleecher Snyder	fb66ff7c78	util/codegen: add package ... This is a package for shared utilities used in doing codegen programs. The inaugural API is for writing gofmt'd code to a file. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
David Anderson	bb10443edf	wgengine/wgcfg: use just the hexlified node key as the WireGuard endpoint. ... The node key is all magicsock needs to find the endpoint that WireGuard needs. Updates #2752 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	54bc3b7d97	util/deephash: remove soon to be deleted field from wgcfg. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Joe Tsai	3f1317e3e5	util/deephash: fix TestArrayAllocs ... Unfortunately this test fails on certain architectures. The problem comes down to inconsistencies in the Go escape analysis where specific variables are marked as escaping on certain architectures. The variables escaping to the heap are unfortunately in crypto/sha256, which makes it impossible to fixthis locally in deephash. For now, fix the test by compensating for the allocations that occur from calling sha256.digest.Sum. See golang/go#48055 Fixes #2727 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
slowy07	ac0353e982	fix: typo spelling grammar ... Signed-off-by: slowy07 <slowy.arfy@gmail.com>	3 years ago
David Crawshaw	360223fccb	types/dnstype: introduce new package for Resolver ... So the type can be used in net/dns without introducing a tailcfg dependency. For #2596 Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Josh Bleecher Snyder	a5da4ed981	all: gofmt with Go 1.17 ... This adds "//go:build" lines and tidies up existing "// +build" lines. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Joe Tsai	9d0c86b6ec	util/deephash: remove unnecessary formatting for structs and slices (#2571) ... The index for every struct field or slice element and the number of fields for the struct is unncessary. The hashing of Go values is unambiguous because every type (except maps) encodes in a parsable manner. So long as we know the type information, we could theoretically decode every value (except for maps). At a high level: * numbers are encoded as fixed-width records according to precision. * strings (and AppendTo output) are encoded with a fixed-width length, followed by the contents of the buffer. * slices are prefixed by a fixed-width length, followed by the encoding of each value. So long as we know the type of each element, we could theoretically decode each element. * arrays are encoded just like slices, but elide the length since it is determined from the Go type. * maps are encoded first with a byte indicating whether it is a cycle. If a cycle, it is followed by a fixed-width index for the pointer, otherwise followed by the SHA-256 hash of its contents. The encoding of maps is not decodeable, but a SHA-256 hash is sufficient to avoid ambiguities. * interfaces are encoded first with a byte indicating whether it is nil. If not nil, it is followed by a fixed-width index for the type, and then the encoding for the underlying value. Having the type be encoded first ensures that the value could theoretically be decoded next. * pointers are encoded first with a byte indicating whether it is 1) nil, 2) a cycle, or 3) newly seen. If a cycle, it is followed by a fixed-width index for the pointer. If newly seen, it is followed by the encoding for the pointed-at value. Removing unnecessary details speeds up hashing: name old time/op new time/op delta Hash-8 76.0µs ± 1% 55.8µs ± 2% -26.62% (p=0.000 n=10+10) HashMapAcyclic-8 61.9µs ± 0% 62.0µs ± 0% ~ (p=0.666 n=9+9) TailcfgNode-8 10.2µs ± 1% 7.5µs ± 1% -26.90% (p=0.000 n=10+9) HashArray-8 1.07µs ± 1% 0.70µs ± 1% -34.67% (p=0.000 n=10+9) Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Joe Tsai	d8fbce7eef	util/deephash: hash uint{8,16,32,64} explicitly (#2502) ... Instead of hashing the humanly formatted forms of a number, hash the native machine bits of the integers themselves. There is a small performance gain for this: name old time/op new time/op delta Hash-8 75.7µs ± 1% 76.0µs ± 2% ~ (p=0.315 n=10+9) HashMapAcyclic-8 63.1µs ± 3% 61.3µs ± 1% -2.77% (p=0.000 n=10+10) TailcfgNode-8 10.3µs ± 1% 10.2µs ± 1% -1.48% (p=0.000 n=10+10) HashArray-8 1.07µs ± 1% 1.05µs ± 1% -1.79% (p=0.000 n=10+10) Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Joe Tsai	01d4dd331d	util/deephash: simplify hasher.hashMap (#2503) ... The swapping of bufio.Writer between hasher and mapHasher is subtle. Just embed a hasher in mapHasher to avoid complexity here. No notable change in performance: name old time/op new time/op delta Hash-8 76.7µs ± 1% 77.0µs ± 1% ~ (p=0.182 n=9+10) HashMapAcyclic-8 62.4µs ± 1% 62.5µs ± 1% ~ (p=0.315 n=10+9) TailcfgNode-8 10.3µs ± 1% 10.3µs ± 1% -0.62% (p=0.004 n=10+9) HashArray-8 1.07µs ± 1% 1.06µs ± 1% -0.98% (p=0.001 n=8+9) Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Joe Tsai	d145c594ad	util/deephash: improve cycle detection (#2470) ... The previous algorithm used a map of all visited pointers. The strength of this approach is that it quickly prunes any nodes that we have ever visited before. The detriment of the approach is that pruning is heavily dependent on the order that pointers were visited. This is especially relevant for hashing a map where map entries are visited in a non-deterministic manner, which would cause the map hash to be non-deterministic (which defeats the point of a hash). This new algorithm uses a stack of all visited pointers, similar to how github.com/google/go-cmp performs cycle detection. When we visit a pointer, we push it onto the stack, and when we leave a pointer, we pop it from the stack. Before visiting a pointer, we first check whether the pointer exists anywhere in the stack. If yes, then we prune the node. The detriment of this approach is that we may hash a node more often than before since we do not prune as aggressively. The set of visited pointers up until any node is only the path of nodes up to that node and not any other pointers that may have been visited elsewhere. This provides us deterministic hashing regardless of visit order. We can now delete hashMapFallback and associated complexity, which only exists because the previous approach was non-deterministic in the presence of cycles. This fixes a failure of the old algorithm where obviously different values are treated as equal because the pruning was too aggresive. See https://github.com/tailscale/tailscale/issues/2443#issuecomment-883653534 The new algorithm is slightly slower since it prunes less aggresively: name old time/op new time/op delta Hash-8 66.1µs ± 1% 68.8µs ± 1% +4.09% (p=0.000 n=19+19) HashMapAcyclic-8 63.0µs ± 1% 62.5µs ± 1% -0.76% (p=0.000 n=18+19) TailcfgNode-8 9.79µs ± 2% 9.88µs ± 1% +0.95% (p=0.000 n=19+17) HashArray-8 643ns ± 1% 653ns ± 1% +1.64% (p=0.000 n=19+19) However, a slower but more correct algorithm seems more favorable than a faster but incorrect algorithm. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Joe Tsai	d666bd8533	util/deephash: disambiguate hashing of AppendTo (#2483) ... Prepend size to AppendTo output. Fixes #2443 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Joe Tsai	23ad028414	util/deephash: include type as part of hash for interfaces (#2476) ... A Go interface may hold any number of different concrete types. Just because two underlying values hash to the same thing does not mean the two values are identical if they have different concrete types. As such, include the type in the hash.	3 years ago
Joe Tsai	a5fb8e0731	util/deephash: introduce deliberate instability (#2477) ... Seed the hash upon first use with the current time. This ensures that the stability of the hash is bounded within the lifetime of one program execution. Hopefully, this prevents future bugs where someone assumes that this hash is stable. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Joe Tsai	9a0c8bdd20	util/deephash: make hash type opaque ... The fact that Hash returns a [sha256.Size]byte leaks details about the underlying hash implementation. This could very well be any other hashing algorithm with a possible different block size. Abstract this implementation detail away by declaring an opaque type that is comparable. While we are changing the signature of UpdateHash, rename it to just Update to reduce stutter (e.g., deephash.Update). Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Brad Fitzpatrick	ddb8726c98	util/deephash: don't reflect.Copy if element type is a defined uint8 ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	df176c82f5	util/deephash: skip alloc test under race detector ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	6dc38ff25c	util/deephash: optimize hashing of byte arrays, reduce allocs in Hash ... name old time/op new time/op delta Hash-6 173µs ± 4% 101µs ± 3% -41.69% (p=0.000 n=10+9) HashMapAcyclic-6 101µs ± 5% 105µs ± 3% +3.52% (p=0.001 n=9+10) TailcfgNode-6 29.4µs ± 2% 16.4µs ± 3% -44.25% (p=0.000 n=8+10) name old alloc/op new alloc/op delta Hash-6 3.60kB ± 0% 1.13kB ± 0% -68.70% (p=0.000 n=10+10) HashMapAcyclic-6 2.53kB ± 0% 2.53kB ± 0% ~ (p=0.137 n=10+8) TailcfgNode-6 528B ± 0% 0B -100.00% (p=0.000 n=10+10) name old allocs/op new allocs/op delta Hash-6 84.0 ± 0% 40.0 ± 0% -52.38% (p=0.000 n=10+10) HashMapAcyclic-6 202 ± 0% 202 ± 0% ~ (all equal) TailcfgNode-6 11.0 ± 0% 0.0 -100.00% (p=0.000 n=10+10) Updates tailscale/corp#2130 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	3962744450	util/deephash: prevent infinite loop on map cycle ... Fixes #2340 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	aceaa70b16	util/deephash: move funcs to methods ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	14f901da6d	util/deephash: fix sync.Pool usage ... Whoops. From yesterday's 9ae3bd0939 (not yet used by anything, fortunately) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	e0258ffd92	util/deephash: use keyed struct literal, fix vet ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	bf9f279768	util/deephash: optimize CPU a bit by by avoiding fmt in more places ... name old time/op new time/op delta Hash-6 179µs ± 5% 173µs ± 4% -3.12% (p=0.004 n=10+10) HashMapAcyclic-6 115µs ± 3% 101µs ± 5% -11.51% (p=0.000 n=9+9) TailcfgNode-6 30.8µs ± 4% 29.4µs ± 2% -4.51% (p=0.000 n=10+8) name old alloc/op new alloc/op delta Hash-6 3.60kB ± 0% 3.60kB ± 0% ~ (p=0.445 n=9+10) HashMapAcyclic-6 2.53kB ± 0% 2.53kB ± 0% ~ (p=0.065 n=9+10) TailcfgNode-6 528B ± 0% 528B ± 0% ~ (all equal) name old allocs/op new allocs/op delta Hash-6 84.0 ± 0% 84.0 ± 0% ~ (all equal) HashMapAcyclic-6 202 ± 0% 202 ± 0% ~ (all equal) TailcfgNode-6 11.0 ± 0% 11.0 ± 0% ~ (all equal) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	58f2ef6085	util/deephash: add a benchmark and some benchmark data ... No code changes. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	9ae3bd0939	util/deephash: export a Hash func for use by the control plane ... name old time/op new time/op delta Hash-6 69.4µs ± 6% 68.4µs ± 4% ~ (p=0.286 n=9+9) HashMapAcyclic-6 115µs ± 5% 115µs ± 4% ~ (p=1.000 n=10+10) name old alloc/op new alloc/op delta Hash-6 2.29kB ± 0% 1.88kB ± 0% -18.13% (p=0.000 n=10+10) HashMapAcyclic-6 2.53kB ± 0% 2.53kB ± 0% ~ (all equal) name old allocs/op new allocs/op delta Hash-6 58.0 ± 0% 54.0 ± 0% -6.90% (p=0.000 n=10+10) HashMapAcyclic-6 202 ± 0% 202 ± 0% ~ (all equal) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	700badd8f8	util/deephash: move internal/deephash to util/deephash ... No code changes. Just a minor package doc addition about lack of API stability.	3 years ago
David Crawshaw	6b9f8208f4	net/dns: do not run wsl.exe as LocalSystem ... It doesn't work. It needs to run as the user. https://github.com/microsoft/WSL/issues/4803 The mechanism for doing this was extracted from: https://web.archive.org/web/20101009012531/http://blogs.msdn.com/b/winsdk/archive/2009/07/14/launching-an-interactive-process-from-windows-service-in-windows-vista-and-later.aspx While here, we also reclaculate WSL distro set on SetDNS. This accounts for: 1. potential inability to access wsl.exe on startup 2. WSL being installed while Tailscale is running 3. A new WSL distrobution being installed Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
Maisem Ali	f944614c5c	cmd/tailscale/web: add support for QNAP ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
David Anderson	c54cc24e87	util/dnsname: make ToFQDN take exactly 0 or 1 allocs for everything. ... name old time/op new time/op delta ToFQDN/www.tailscale.com.-32 9.55ns ± 2% 12.13ns ± 3% +27.03% (p=0.000 n=10+10) ToFQDN/www.tailscale.com-32 86.3ns ± 1% 40.7ns ± 1% -52.86% (p=0.000 n=10+9) ToFQDN/.www.tailscale.com-32 86.5ns ± 1% 40.4ns ± 1% -53.29% (p=0.000 n=10+9) ToFQDN/_ssh._tcp.www.tailscale.com.-32 12.8ns ± 2% 14.7ns ± 2% +14.24% (p=0.000 n=9+10) ToFQDN/_ssh._tcp.www.tailscale.com-32 104ns ± 1% 45ns ± 0% -57.16% (p=0.000 n=10+9) name old alloc/op new alloc/op delta ToFQDN/www.tailscale.com.-32 0.00B 0.00B ~ (all equal) ToFQDN/www.tailscale.com-32 72.0B ± 0% 24.0B ± 0% -66.67% (p=0.000 n=10+10) ToFQDN/.www.tailscale.com-32 72.0B ± 0% 24.0B ± 0% -66.67% (p=0.000 n=10+10) ToFQDN/_ssh._tcp.www.tailscale.com.-32 0.00B 0.00B ~ (all equal) ToFQDN/_ssh._tcp.www.tailscale.com-32 112B ± 0% 32B ± 0% -71.43% (p=0.000 n=10+10) name old allocs/op new allocs/op delta ToFQDN/www.tailscale.com.-32 0.00 0.00 ~ (all equal) ToFQDN/www.tailscale.com-32 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) ToFQDN/.www.tailscale.com-32 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) ToFQDN/_ssh._tcp.www.tailscale.com.-32 0.00 0.00 ~ (all equal) ToFQDN/_ssh._tcp.www.tailscale.com-32 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	d7f6ef3a79	util/dnsname: add a benchmark for ToFQDN. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	caaefa00a0	util/dnsname: don't validate the contents of DNS labels. ... DNS names consist of labels, but outside of length limits, DNS itself permits any content within the labels. Some records require labels to conform to hostname limitations (which is what we implemented before), but not all. Fixes #2024. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	dc32b4695c	util/dnsname: normalize leading dots in ToFQDN. ... Fixes #1888. Signed-off-by: David Anderson <dave@natulte.net>	4 years ago
David Anderson	31f81b782e	util/cmpver: move into OSS from corp repo. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Aleksandar Pesic	7c985e4944	ipn/ipnlocal: add file sharing to windows shell ... Updates: tailscale/winmin#33 Signed-off-by: Aleksandar Pesic <peske.nis@gmail.com>	4 years ago
David Anderson	7055f870f8	control/controlclient: only use a single DNS label as the hostname. ... Fixes #971 Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	1a371b93be	util/dnsname: add FQDN type, use throughout codebase. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	9f105d3968	net/dns/resolver: teach the forwarder to do per-domain routing. ... Given a DNS route map, the forwarder selects the right set of upstreams for a given name. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Christine Dodrill	a480b1baa5	logpolicy: set log target on windows based on a registry key (#1542) ... Signed-off-by: Christine Dodrill <xe@tailscale.com>	4 years ago
Matt Layher	719de8f0e1	util/systemd: explicitly check for os.ErrNotExist from sdnotify ... Signed-off-by: Matt Layher <mdlayher@gmail.com>	4 years ago
Brad Fitzpatrick	2d5db90161	util/winutil: make it actually compile ... Helps to use the right GOOS after refactoring, sigh. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	e98cdbb8b6	util/winutil: add little Windows utility package ... Code from Alex Brainman, split out of another change. I changed it to a comma-ok return and tweaked the docs a bit.	4 years ago
Sonia Appasamy	76fb27bea7	dnsname,tailcfg: add hostname sanitation logic to node display names (#1304) ... Signed-off-by: Sonia Appasamy <sonia@tailscale.com>	4 years ago
Josh Bleecher Snyder	635e4c7435	wgengine/magicsock: increase legacy ping timeout again ... I based my estimation of the required timeout based on locally observed behavior. But CI machines are worse than my local machine. 16s was enough to reduce flakiness but not eliminate it. Bump it up again. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Sonia Appasamy	4dab0c1702	tailcfg: update node display name fields and methods (#1207) ... Signed-off-by: Sonia Appasamy <sonia@tailscale.com> Consolidates the node display name logic from each of the clients into tailcfg.Node. UI clients can use these names directly, rather than computing them independently.	4 years ago
Sonia Appasamy	567c5a6d9e	tailcfg, controlclient: add DisplayName field to tailcfg.Node and populate it from controlclient (#1191) ... Signed-off-by: Sonia Appasamy <sonia@tailscale.com>	4 years ago
Brad Fitzpatrick	5efb0a8bca	cmd/tailscale: change formatting of "tailscale status" ... * show DNS name over hostname, removing domain's common MagicDNS suffix. only show hostname if there's no DNS name. but still show shared devices' MagicDNS FQDN. * remove nerdy low-level details by default: endpoints, DERP relay, public key. They're available in JSON mode still for those who need them. * only show endpoint or DERP relay when it's active with the goal of making debugging easier. (so it's easier for users to understand what's happening) The asterisks are gone. * remove Tx/Rx numbers by default for idle peers; only show them when there's traffic. * include peers' owner login names * add CLI option to not show peers (matching --self=true, --peers= also defaults to true) * sort by DNS/host name, not public key * reorder columns	4 years ago
Brad Fitzpatrick	5f07da4854	util/systemd: don't log warnings when not running under systemd ... It caused our integration tests to fail, which prohibit logging to os.Stderr for test cleanliness reasons.	4 years ago
Christine Dodrill	7ea809897d	ipn/ipnserver: enable systemd-notify support ... Addresses #964 Still to be done: - Figure out the correct logging lines in util/systemd - Figure out if we need to slip the systemd.Status function anywhere else - Log util/systemd errors? (most of the errors are of the "you cannot do anything about this, but it might be a bad idea to crash the program if it errors" kind) Assistance in getting this over the finish line would help a lot. Signed-off-by: Christine Dodrill <me@christine.website> util/systemd: rename the nonlinux file to appease the magic Signed-off-by: Christine Dodrill <me@christine.website> util/systemd: fix package name Signed-off-by: Christine Dodrill <me@christine.website> util/systemd: fix review feedback from @mdlayher Signed-off-by: Christine Dodrill <me@christine.website> cmd/tailscale{,d}: update depaware manifests Signed-off-by: Christine Dodrill <me@christine.website> util/systemd: use sync.Once instead of func init Signed-off-by: Christine Dodrill <me@christine.website> control/controlclient: minor review feedback fixes Signed-off-by: Christine Dodrill <me@christine.website> {control,ipn,systemd}: fix review feedback Signed-off-by: Christine Dodrill <me@christine.website> review feedback fixes Signed-off-by: Christine Dodrill <me@christine.website> ipn: fix sprintf call Signed-off-by: Christine Dodrill <me@christine.website> ipn: make staticcheck less sad Signed-off-by: Christine Dodrill <me@christine.website> ipn: print IP address in connected status Signed-off-by: Christine Dodrill <me@christine.website> ipn: review feedback Signed-off-by: Christine Dodrill <me@christine.website> final fixups Signed-off-by: Christine Dodrill <me@christine.website>	4 years ago
Josh Bleecher Snyder	a5dd0bcb09	util/jsonutil: new package ... The cornerstone API is a more memory-efficient Unmarshal. The savings come from re-using a json.Decoder. BenchmarkUnmarshal-8 4016418 288 ns/op 8 B/op 1 allocs/op BenchmarkStdUnmarshal-8 4189261 283 ns/op 184 B/op 2 allocs/op It also includes a Bytes type to reduce allocations when unmarshalling a non-hex-encoded JSON string into a []byte. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Josh Bleecher Snyder	b65eee0745	util/lineread: add docs to Reader ... In particular, point out how to stop reading and detect it on the other side. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	c8939ab7c7	util/endian: add Native variable to get the platform's native binary.ByteOrder ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	ff50ddf1ee	util/racebuild: add package to export a race-is-enabled const	4 years ago
Brad Fitzpatrick	000347d4cf	util/endian: add package with const for whether platform is big endian	4 years ago
Josh Bleecher Snyder	9784cae23b	util/uniq: add new package ... This makes it easy to compact slices that contain duplicate elements by sorting and then uniqing. This is an alternative to constructing an intermediate map and then extracting elements from it. It also provides more control over equality than using a map key does. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	bc1751a376	util/pidowner: add missing copyright header	4 years ago
Brad Fitzpatrick	b14288f96c	util/pidowner: add two missing copyright headers	4 years ago
Brad Fitzpatrick	23f01174ea	util/pidowner: new package to map from process ID to its user ID	4 years ago
Brad Fitzpatrick	c3c607e78a	util/lineread: add little package to read lines from files/Readers	4 years ago