2 files changed, 95 insertions, 0 deletions
diff --git a/ldd/error.go b/ldd/error.go
new file mode 100644
index 00000000..51aef948
--- /dev/null
+++ b/ldd/error.go
@@ -0,0 +1,11 @@
+package ldd
+
+import "fmt"
+
+type EntryUnexpectedSegmentsError struct {
+	Entry string
+}
+
+func (e *EntryUnexpectedSegmentsError) Error() string {
+	return fmt.Sprintf("unexpected segments in entry %q", e.Entry)
+}
diff --git a/ldd/ldd.go b/ldd/ldd.go
new file mode 100644
index 00000000..989aeca5
--- /dev/null
+++ b/ldd/ldd.go
@@ -0,0 +1,84 @@
+package ldd
+
+import (
+	"errors"
+	"fmt"
+	"math"
+	"os"
+	"os/exec"
+	"path"
+	"strconv"
+	"strings"
+)
+
+var (
+	ErrUnexpectedSeparator = errors.New("unexpected separator")
+	ErrPathNotAbsolute     = errors.New("path not absolute")
+	ErrBadLocationFormat   = errors.New("bad location format")
+)
+
+type Entry struct {
+	Name     string `json:"name,omitempty"`
+	Path     string `json:"path,omitempty"`
+	Location uint64 `json:"location"`
+}
+
+func Exec(p string) ([]*Entry, error) {
+	t := exec.Command("ldd", p)
+	t.Stdout = new(strings.Builder)
+	t.Stderr = os.Stderr
+
+	if err := t.Run(); err != nil {
+		return nil, err
+	}
+
+	out := t.Stdout.(fmt.Stringer).String()
+	payload := strings.Split(out, "\n")
+
+	result := make([]*Entry, len(payload))
+
+	for i, ent := range payload {
+		if len(ent) == 0 {
+			continue
+		}
+
+		segment := strings.SplitN(ent, " ", 5)
+
+		var iL int
+
+		switch len(segment) {
+		case 2: // /lib/ld-musl-x86_64.so.1 (0x7f04d14ef000)
+			iL = 1
+			result[i] = &Entry{Name: segment[0]}
+		case 4: // libc.musl-x86_64.so.1 => /lib/ld-musl-x86_64.so.1 (0x7f04d14ef000)
+			iL = 3
+			if segment[1] != "=>" {
+				return nil, ErrUnexpectedSeparator
+			}
+			if !path.IsAbs(segment[2]) {
+				return nil, ErrPathNotAbsolute
+			}
+			result[i] = &Entry{
+				Name: segment[0],
+				Path: segment[2],
+			}
+		default:
+			return nil, &EntryUnexpectedSegmentsError{ent}
+		}
+
+		if loc, err := parseLocation(segment[iL]); err != nil {
+			return nil, err
+		} else {
+			result[i].Location = loc
+		}
+	}
+
+	return result, nil
+}
+
+func parseLocation(s string) (uint64, error) {
+	if len(s) < 4 || s[len(s)-1] != ')' || s[:3] != "(0x" {
+		return math.MaxUint64, ErrBadLocationFormat
+	}
+	return strconv.ParseUint(s[3:len(s)-1], 16, 64)
+}