diff options
Diffstat (limited to 'vendor/github.com/prometheus/procfs/net_unix.go')
| -rw-r--r-- | vendor/github.com/prometheus/procfs/net_unix.go | 257 |
1 files changed, 0 insertions, 257 deletions
diff --git a/vendor/github.com/prometheus/procfs/net_unix.go b/vendor/github.com/prometheus/procfs/net_unix.go deleted file mode 100644 index 98aa8e1c3..000000000 --- a/vendor/github.com/prometheus/procfs/net_unix.go +++ /dev/null @@ -1,257 +0,0 @@ -// Copyright 2018 The Prometheus Authors -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package procfs - -import ( - "bufio" - "fmt" - "io" - "os" - "strconv" - "strings" -) - -// For the proc file format details, -// see https://elixir.bootlin.com/linux/v4.17/source/net/unix/af_unix.c#L2815 -// and https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/net.h#L48. - -// Constants for the various /proc/net/unix enumerations. -// TODO: match against x/sys/unix or similar? -const ( - netUnixTypeStream = 1 - netUnixTypeDgram = 2 - netUnixTypeSeqpacket = 5 - - netUnixFlagDefault = 0 - netUnixFlagListen = 1 << 16 - - netUnixStateUnconnected = 1 - netUnixStateConnecting = 2 - netUnixStateConnected = 3 - netUnixStateDisconnected = 4 -) - -// NetUNIXType is the type of the type field. -type NetUNIXType uint64 - -// NetUNIXFlags is the type of the flags field. -type NetUNIXFlags uint64 - -// NetUNIXState is the type of the state field. -type NetUNIXState uint64 - -// NetUNIXLine represents a line of /proc/net/unix. -type NetUNIXLine struct { - KernelPtr string - RefCount uint64 - Protocol uint64 - Flags NetUNIXFlags - Type NetUNIXType - State NetUNIXState - Inode uint64 - Path string -} - -// NetUNIX holds the data read from /proc/net/unix. -type NetUNIX struct { - Rows []*NetUNIXLine -} - -// NetUNIX returns data read from /proc/net/unix. -func (fs FS) NetUNIX() (*NetUNIX, error) { - return readNetUNIX(fs.proc.Path("net/unix")) -} - -// readNetUNIX reads data in /proc/net/unix format from the specified file. -func readNetUNIX(file string) (*NetUNIX, error) { - // This file could be quite large and a streaming read is desirable versus - // reading the entire contents at once. - f, err := os.Open(file) - if err != nil { - return nil, err - } - defer f.Close() - - return parseNetUNIX(f) -} - -// parseNetUNIX creates a NetUnix structure from the incoming stream. -func parseNetUNIX(r io.Reader) (*NetUNIX, error) { - // Begin scanning by checking for the existence of Inode. - s := bufio.NewScanner(r) - s.Scan() - - // From the man page of proc(5), it does not contain an Inode field, - // but in actually it exists. This code works for both cases. - hasInode := strings.Contains(s.Text(), "Inode") - - // Expect a minimum number of fields, but Inode and Path are optional: - // Num RefCount Protocol Flags Type St Inode Path - minFields := 6 - if hasInode { - minFields++ - } - - var nu NetUNIX - for s.Scan() { - line := s.Text() - item, err := nu.parseLine(line, hasInode, minFields) - if err != nil { - return nil, fmt.Errorf("failed to parse /proc/net/unix data %q: %w", line, err) - } - - nu.Rows = append(nu.Rows, item) - } - - if err := s.Err(); err != nil { - return nil, fmt.Errorf("failed to scan /proc/net/unix data: %w", err) - } - - return &nu, nil -} - -func (u *NetUNIX) parseLine(line string, hasInode bool, min int) (*NetUNIXLine, error) { - fields := strings.Fields(line) - - l := len(fields) - if l < min { - return nil, fmt.Errorf("expected at least %d fields but got %d", min, l) - } - - // Field offsets are as follows: - // Num RefCount Protocol Flags Type St Inode Path - - kernelPtr := strings.TrimSuffix(fields[0], ":") - - users, err := u.parseUsers(fields[1]) - if err != nil { - return nil, fmt.Errorf("failed to parse ref count %q: %w", fields[1], err) - } - - flags, err := u.parseFlags(fields[3]) - if err != nil { - return nil, fmt.Errorf("failed to parse flags %q: %w", fields[3], err) - } - - typ, err := u.parseType(fields[4]) - if err != nil { - return nil, fmt.Errorf("failed to parse type %q: %w", fields[4], err) - } - - state, err := u.parseState(fields[5]) - if err != nil { - return nil, fmt.Errorf("failed to parse state %q: %w", fields[5], err) - } - - var inode uint64 - if hasInode { - inode, err = u.parseInode(fields[6]) - if err != nil { - return nil, fmt.Errorf("failed to parse inode %q: %w", fields[6], err) - } - } - - n := &NetUNIXLine{ - KernelPtr: kernelPtr, - RefCount: users, - Type: typ, - Flags: flags, - State: state, - Inode: inode, - } - - // Path field is optional. - if l > min { - // Path occurs at either index 6 or 7 depending on whether inode is - // already present. - pathIdx := 7 - if !hasInode { - pathIdx-- - } - - n.Path = fields[pathIdx] - } - - return n, nil -} - -func (u NetUNIX) parseUsers(s string) (uint64, error) { - return strconv.ParseUint(s, 16, 32) -} - -func (u NetUNIX) parseType(s string) (NetUNIXType, error) { - typ, err := strconv.ParseUint(s, 16, 16) - if err != nil { - return 0, err - } - - return NetUNIXType(typ), nil -} - -func (u NetUNIX) parseFlags(s string) (NetUNIXFlags, error) { - flags, err := strconv.ParseUint(s, 16, 32) - if err != nil { - return 0, err - } - - return NetUNIXFlags(flags), nil -} - -func (u NetUNIX) parseState(s string) (NetUNIXState, error) { - st, err := strconv.ParseInt(s, 16, 8) - if err != nil { - return 0, err - } - - return NetUNIXState(st), nil -} - -func (u NetUNIX) parseInode(s string) (uint64, error) { - return strconv.ParseUint(s, 10, 64) -} - -func (t NetUNIXType) String() string { - switch t { - case netUnixTypeStream: - return "stream" - case netUnixTypeDgram: - return "dgram" - case netUnixTypeSeqpacket: - return "seqpacket" - } - return "unknown" -} - -func (f NetUNIXFlags) String() string { - switch f { - case netUnixFlagListen: - return "listen" - default: - return "default" - } -} - -func (s NetUNIXState) String() string { - switch s { - case netUnixStateUnconnected: - return "unconnected" - case netUnixStateConnecting: - return "connecting" - case netUnixStateConnected: - return "connected" - case netUnixStateDisconnected: - return "disconnected" - } - return "unknown" -} |