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homedir.go
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homedir.go
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package fileutil
import (
"os"
"os/user"
)
func getHomeFromSudoUser() (string, *user.User, bool) {
sudoUserName, ok := os.LookupEnv("SUDO_USER")
if !ok {
return "", nil, false
}
u, err := user.Lookup(sudoUserName)
if err != nil {
return "", nil, false
}
if u.HomeDir == "" {
return "", nil, false
}
writable, _ := IsDirWritable(u.HomeDir)
if !writable {
return "", nil, false
}
return u.HomeDir, u, true
}
func getHomeFromHomeEnv() (string, *user.User, bool) {
home, ok := os.LookupEnv("HOME")
if !ok {
return "", nil, false
}
return home, nil, true
}
func getHomeFromUserCurrent() (string, *user.User, bool) {
u, err := user.Current()
if err != nil {
return "", nil, false
}
if u.HomeDir == "" {
return "", nil, false
}
// do NOT return the user here, because the user is only
// required during the SUDO_USER case; where as this case
// the permissions will belong to the current user and won't need changing.
return u.HomeDir, nil, true
}
// HomeDir returns the home directory of the current user, together with
// the user object who owns it. If SUDO_USER is detected, then that user's
// home directory will be used instead.
func HomeDir() (string, *user.User) {
for _, fn := range []func() (string, *user.User, bool){
getHomeFromSudoUser,
getHomeFromHomeEnv,
getHomeFromUserCurrent,
} {
home, u, ok := fn()
if ok {
return home, u
}
}
return "/etc", nil
}