From f8d5101f1924552f09133a7c7463da2a74cad3d5 Mon Sep 17 00:00:00 2001 From: Tianon Gravi Date: Tue, 29 Jul 2014 11:08:10 -0600 Subject: [PATCH] Remove pkg/user now that it's embedded in libcontainer Docker-DCO-1.1-Signed-off-by: Andrew Page (github: tianon) --- user/MAINTAINERS | 1 - user/user.go | 256 ---------------------------------------------- user/user_test.go | 94 ----------------- 3 files changed, 351 deletions(-) delete mode 100644 user/MAINTAINERS delete mode 100644 user/user.go delete mode 100644 user/user_test.go diff --git a/user/MAINTAINERS b/user/MAINTAINERS deleted file mode 100644 index 18e05a3..0000000 --- a/user/MAINTAINERS +++ /dev/null @@ -1 +0,0 @@ -Tianon Gravi (@tianon) diff --git a/user/user.go b/user/user.go deleted file mode 100644 index df47101..0000000 --- a/user/user.go +++ /dev/null @@ -1,256 +0,0 @@ -package user - -import ( - "bufio" - "fmt" - "io" - "os" - "strconv" - "strings" -) - -const ( - minId = 0 - maxId = 1<<31 - 1 //for 32-bit systems compatibility -) - -var ( - ErrRange = fmt.Errorf("Uids and gids must be in range %d-%d", minId, maxId) -) - -type User struct { - Name string - Pass string - Uid int - Gid int - Gecos string - Home string - Shell string -} - -type Group struct { - Name string - Pass string - Gid int - List []string -} - -func parseLine(line string, v ...interface{}) { - if line == "" { - return - } - - parts := strings.Split(line, ":") - for i, p := range parts { - if len(v) <= i { - // if we have more "parts" than we have places to put them, bail for great "tolerance" of naughty configuration files - break - } - - switch e := v[i].(type) { - case *string: - // "root", "adm", "/bin/bash" - *e = p - case *int: - // "0", "4", "1000" - // ignore string to int conversion errors, for great "tolerance" of naughty configuration files - *e, _ = strconv.Atoi(p) - case *[]string: - // "", "root", "root,adm,daemon" - if p != "" { - *e = strings.Split(p, ",") - } else { - *e = []string{} - } - default: - // panic, because this is a programming/logic error, not a runtime one - panic("parseLine expects only pointers! argument " + strconv.Itoa(i) + " is not a pointer!") - } - } -} - -func ParsePasswd() ([]*User, error) { - return ParsePasswdFilter(nil) -} - -func ParsePasswdFilter(filter func(*User) bool) ([]*User, error) { - f, err := os.Open("/etc/passwd") - if err != nil { - return nil, err - } - defer f.Close() - return parsePasswdFile(f, filter) -} - -func parsePasswdFile(r io.Reader, filter func(*User) bool) ([]*User, error) { - var ( - s = bufio.NewScanner(r) - out = []*User{} - ) - - for s.Scan() { - if err := s.Err(); err != nil { - return nil, err - } - - text := strings.TrimSpace(s.Text()) - if text == "" { - continue - } - - // see: man 5 passwd - // name:password:UID:GID:GECOS:directory:shell - // Name:Pass:Uid:Gid:Gecos:Home:Shell - // root:x:0:0:root:/root:/bin/bash - // adm:x:3:4:adm:/var/adm:/bin/false - p := &User{} - parseLine( - text, - &p.Name, &p.Pass, &p.Uid, &p.Gid, &p.Gecos, &p.Home, &p.Shell, - ) - - if filter == nil || filter(p) { - out = append(out, p) - } - } - - return out, nil -} - -func ParseGroup() ([]*Group, error) { - return ParseGroupFilter(nil) -} - -func ParseGroupFilter(filter func(*Group) bool) ([]*Group, error) { - f, err := os.Open("/etc/group") - if err != nil { - return nil, err - } - defer f.Close() - return parseGroupFile(f, filter) -} - -func parseGroupFile(r io.Reader, filter func(*Group) bool) ([]*Group, error) { - var ( - s = bufio.NewScanner(r) - out = []*Group{} - ) - - for s.Scan() { - if err := s.Err(); err != nil { - return nil, err - } - - text := s.Text() - if text == "" { - continue - } - - // see: man 5 group - // group_name:password:GID:user_list - // Name:Pass:Gid:List - // root:x:0:root - // adm:x:4:root,adm,daemon - p := &Group{} - parseLine( - text, - &p.Name, &p.Pass, &p.Gid, &p.List, - ) - - if filter == nil || filter(p) { - out = append(out, p) - } - } - - return out, nil -} - -// Given a string like "user", "1000", "user:group", "1000:1000", returns the uid, gid, and list of supplementary group IDs, if possible. -func GetUserGroupSupplementary(userSpec string, defaultUid int, defaultGid int) (int, int, []int, error) { - var ( - uid = defaultUid - gid = defaultGid - suppGids = []int{} - - userArg, groupArg string - ) - - // allow for userArg to have either "user" syntax, or optionally "user:group" syntax - parseLine(userSpec, &userArg, &groupArg) - - users, err := ParsePasswdFilter(func(u *User) bool { - if userArg == "" { - return u.Uid == uid - } - return u.Name == userArg || strconv.Itoa(u.Uid) == userArg - }) - if err != nil && !os.IsNotExist(err) { - if userArg == "" { - userArg = strconv.Itoa(uid) - } - return 0, 0, nil, fmt.Errorf("Unable to find user %v: %v", userArg, err) - } - - haveUser := users != nil && len(users) > 0 - if haveUser { - // if we found any user entries that matched our filter, let's take the first one as "correct" - uid = users[0].Uid - gid = users[0].Gid - } else if userArg != "" { - // we asked for a user but didn't find them... let's check to see if we wanted a numeric user - uid, err = strconv.Atoi(userArg) - if err != nil { - // not numeric - we have to bail - return 0, 0, nil, fmt.Errorf("Unable to find user %v", userArg) - } - if uid < minId || uid > maxId { - return 0, 0, nil, ErrRange - } - - // if userArg couldn't be found in /etc/passwd but is numeric, just roll with it - this is legit - } - - if groupArg != "" || (haveUser && users[0].Name != "") { - groups, err := ParseGroupFilter(func(g *Group) bool { - if groupArg != "" { - return g.Name == groupArg || strconv.Itoa(g.Gid) == groupArg - } - for _, u := range g.List { - if u == users[0].Name { - return true - } - } - return false - }) - if err != nil && !os.IsNotExist(err) { - return 0, 0, nil, fmt.Errorf("Unable to find groups for user %v: %v", users[0].Name, err) - } - - haveGroup := groups != nil && len(groups) > 0 - if groupArg != "" { - if haveGroup { - // if we found any group entries that matched our filter, let's take the first one as "correct" - gid = groups[0].Gid - } else { - // we asked for a group but didn't find id... let's check to see if we wanted a numeric group - gid, err = strconv.Atoi(groupArg) - if err != nil { - // not numeric - we have to bail - return 0, 0, nil, fmt.Errorf("Unable to find group %v", groupArg) - } - if gid < minId || gid > maxId { - return 0, 0, nil, ErrRange - } - - // if groupArg couldn't be found in /etc/group but is numeric, just roll with it - this is legit - } - } else if haveGroup { - suppGids = make([]int, len(groups)) - for i, group := range groups { - suppGids[i] = group.Gid - } - } - } - - return uid, gid, suppGids, nil -} diff --git a/user/user_test.go b/user/user_test.go deleted file mode 100644 index 136632c..0000000 --- a/user/user_test.go +++ /dev/null @@ -1,94 +0,0 @@ -package user - -import ( - "strings" - "testing" -) - -func TestUserParseLine(t *testing.T) { - var ( - a, b string - c []string - d int - ) - - parseLine("", &a, &b) - if a != "" || b != "" { - t.Fatalf("a and b should be empty ('%v', '%v')", a, b) - } - - parseLine("a", &a, &b) - if a != "a" || b != "" { - t.Fatalf("a should be 'a' and b should be empty ('%v', '%v')", a, b) - } - - parseLine("bad boys:corny cows", &a, &b) - if a != "bad boys" || b != "corny cows" { - t.Fatalf("a should be 'bad boys' and b should be 'corny cows' ('%v', '%v')", a, b) - } - - parseLine("", &c) - if len(c) != 0 { - t.Fatalf("c should be empty (%#v)", c) - } - - parseLine("d,e,f:g:h:i,j,k", &c, &a, &b, &c) - if a != "g" || b != "h" || len(c) != 3 || c[0] != "i" || c[1] != "j" || c[2] != "k" { - t.Fatalf("a should be 'g', b should be 'h', and c should be ['i','j','k'] ('%v', '%v', '%#v')", a, b, c) - } - - parseLine("::::::::::", &a, &b, &c) - if a != "" || b != "" || len(c) != 0 { - t.Fatalf("a, b, and c should all be empty ('%v', '%v', '%#v')", a, b, c) - } - - parseLine("not a number", &d) - if d != 0 { - t.Fatalf("d should be 0 (%v)", d) - } - - parseLine("b:12:c", &a, &d, &b) - if a != "b" || b != "c" || d != 12 { - t.Fatalf("a should be 'b' and b should be 'c', and d should be 12 ('%v', '%v', %v)", a, b, d) - } -} - -func TestUserParsePasswd(t *testing.T) { - users, err := parsePasswdFile(strings.NewReader(` -root:x:0:0:root:/root:/bin/bash -adm:x:3:4:adm:/var/adm:/bin/false -this is just some garbage data -`), nil) - if err != nil { - t.Fatalf("Unexpected error: %v", err) - } - if len(users) != 3 { - t.Fatalf("Expected 3 users, got %v", len(users)) - } - if users[0].Uid != 0 || users[0].Name != "root" { - t.Fatalf("Expected users[0] to be 0 - root, got %v - %v", users[0].Uid, users[0].Name) - } - if users[1].Uid != 3 || users[1].Name != "adm" { - t.Fatalf("Expected users[1] to be 3 - adm, got %v - %v", users[1].Uid, users[1].Name) - } -} - -func TestUserParseGroup(t *testing.T) { - groups, err := parseGroupFile(strings.NewReader(` -root:x:0:root -adm:x:4:root,adm,daemon -this is just some garbage data -`), nil) - if err != nil { - t.Fatalf("Unexpected error: %v", err) - } - if len(groups) != 3 { - t.Fatalf("Expected 3 groups, got %v", len(groups)) - } - if groups[0].Gid != 0 || groups[0].Name != "root" || len(groups[0].List) != 1 { - t.Fatalf("Expected groups[0] to be 0 - root - 1 member, got %v - %v - %v", groups[0].Gid, groups[0].Name, len(groups[0].List)) - } - if groups[1].Gid != 4 || groups[1].Name != "adm" || len(groups[1].List) != 3 { - t.Fatalf("Expected groups[1] to be 4 - adm - 3 members, got %v - %v - %v", groups[1].Gid, groups[1].Name, len(groups[1].List)) - } -}