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|
//go:build !windows
package main
import (
"fmt"
"log"
"os"
"os/exec"
"os/user"
"path/filepath"
"runtime"
"strings"
"syscall"
"golang.org/x/sys/unix"
)
var (
envOpener = os.Getenv("OPENER")
envEditor = os.Getenv("VISUAL")
envPager = os.Getenv("PAGER")
envShell = os.Getenv("SHELL")
)
var (
gDefaultShell = "sh"
gDefaultShellFlag = "-c"
gDefaultSocketProt = "unix"
gDefaultSocketPath string
)
var (
gUser *user.User
gConfigPaths []string
gColorsPaths []string
gIconsPaths []string
gFilesPath string
gMarksPath string
gTagsPath string
gHistoryPath string
)
func init() {
if envOpener == "" {
if runtime.GOOS == "darwin" {
envOpener = "open"
} else {
envOpener = "xdg-open"
}
}
if envEditor == "" {
envEditor = os.Getenv("EDITOR")
if envEditor == "" {
envEditor = "vi"
}
}
if envPager == "" {
envPager = "less"
}
if envShell == "" {
envShell = "sh"
}
u, err := user.Current()
if err != nil {
// When the user is not in /etc/passwd (for e.g. LDAP) and CGO_ENABLED=1 in go env,
// the cgo implementation of user.Current() fails even when HOME and USER are set.
log.Printf("user: %s", err)
if os.Getenv("HOME") == "" {
panic("$HOME variable is empty or not set")
}
if os.Getenv("USER") == "" {
panic("$USER variable is empty or not set")
}
u = &user.User{
Username: os.Getenv("USER"),
HomeDir: os.Getenv("HOME"),
}
}
gUser = u
config := os.Getenv("LF_CONFIG_HOME")
if config == "" {
config = os.Getenv("XDG_CONFIG_HOME")
}
if config == "" {
config = filepath.Join(gUser.HomeDir, ".config")
}
gConfigPaths = []string{
filepath.Join("/etc", "lf", "lfrc"),
filepath.Join(config, "lf", "lfrc"),
}
gColorsPaths = []string{
filepath.Join("/etc", "lf", "colors"),
filepath.Join(config, "lf", "colors"),
}
gIconsPaths = []string{
filepath.Join("/etc", "lf", "icons"),
filepath.Join(config, "lf", "icons"),
}
data := os.Getenv("LF_DATA_HOME")
if data == "" {
data = os.Getenv("XDG_DATA_HOME")
}
if data == "" {
data = filepath.Join(gUser.HomeDir, ".local", "share")
}
gFilesPath = filepath.Join(data, "lf", "files")
gMarksPath = filepath.Join(data, "lf", "marks")
gTagsPath = filepath.Join(data, "lf", "tags")
gHistoryPath = filepath.Join(data, "lf", "history")
runtime := os.Getenv("XDG_RUNTIME_DIR")
if runtime == "" {
runtime = os.TempDir()
}
gDefaultSocketPath = filepath.Join(runtime, fmt.Sprintf("lf.%s.sock", gUser.Username))
}
func detachedCommand(name string, arg ...string) *exec.Cmd {
cmd := exec.Command(name, arg...)
cmd.SysProcAttr = &unix.SysProcAttr{Setsid: true}
return cmd
}
func shellCommand(s string, args []string) *exec.Cmd {
if len(gOpts.ifs) != 0 {
s = fmt.Sprintf("IFS='%s'; %s", gOpts.ifs, s)
}
args = append([]string{gOpts.shellflag, s, "--"}, args...)
args = append(gOpts.shellopts, args...)
return exec.Command(gOpts.shell, args...)
}
func shellSetPG(cmd *exec.Cmd) {
cmd.SysProcAttr = &unix.SysProcAttr{Setpgid: true}
}
func shellKill(cmd *exec.Cmd) error {
pgid, err := unix.Getpgid(cmd.Process.Pid)
if err == nil && cmd.Process.Pid == pgid {
// kill the process group
err = unix.Kill(-pgid, 15)
if err == nil {
return nil
}
}
return cmd.Process.Kill()
}
func setDefaults() {
gOpts.cmds["open"] = &execExpr{"&", `$OPENER "$f"`}
gOpts.keys["e"] = &execExpr{"$", `$EDITOR "$f"`}
gOpts.keys["i"] = &execExpr{"$", `$PAGER "$f"`}
gOpts.keys["w"] = &execExpr{"$", "$SHELL"}
gOpts.cmds["doc"] = &execExpr{"$", `"$lf" -doc | $PAGER`}
gOpts.keys["<f-1>"] = &callExpr{"doc", nil, 1}
gOpts.cmds["maps"] = &execExpr{"$", `"$lf" -remote "query $id maps" | $PAGER`}
gOpts.cmds["cmaps"] = &execExpr{"$", `"$lf" -remote "query $id cmaps" | $PAGER`}
gOpts.cmds["cmds"] = &execExpr{"$", `"$lf" -remote "query $id cmds" | $PAGER`}
}
func setUserUmask() {
unix.Umask(0077)
}
func isExecutable(f os.FileInfo) bool {
return f.Mode()&0111 != 0
}
func isHidden(f os.FileInfo, path string, hiddenfiles []string) bool {
hidden := false
for _, pattern := range hiddenfiles {
matched := matchPattern(strings.TrimPrefix(pattern, "!"), f.Name(), path)
if strings.HasPrefix(pattern, "!") && matched {
hidden = false
} else if matched {
hidden = true
}
}
return hidden
}
func userName(f os.FileInfo) string {
if stat, ok := f.Sys().(*syscall.Stat_t); ok {
uid := fmt.Sprint(stat.Uid)
if u, err := user.LookupId(uid); err == nil {
return u.Username
} else {
return uid
}
}
return ""
}
func groupName(f os.FileInfo) string {
if stat, ok := f.Sys().(*syscall.Stat_t); ok {
gid := fmt.Sprint(stat.Gid)
if g, err := user.LookupGroupId(gid); err == nil {
return g.Name
} else {
return gid
}
}
return ""
}
func linkCount(f os.FileInfo) string {
if stat, ok := f.Sys().(*syscall.Stat_t); ok {
return fmt.Sprint(stat.Nlink)
}
return ""
}
func errCrossDevice(err error) bool {
return err.(*os.LinkError).Err.(unix.Errno) == unix.EXDEV
}
func quoteString(s string) string {
return s
}
|
