Always update the ldcache in the container

Even though a particular image (distroless, busybox, alpine) doesn't
include ldconfig, a user may include tooling to read the ldcache in the
container or applications may process the ldconfig using dlopen.

This change always creates the /etc/ld.cache file in the container to
ensure that this works as expected.

Signed-off-by: Evan Lezar <elezar@nvidia.com>

Author: elezar

internal/ldconfig/ldconfig.go

@@ -80,24 +80,11 @@ func (l *Ldconfig) UpdateLDCache(directories ...string) error {
 		// Explicitly specify using /etc/ld.so.conf since the host's ldconfig may
 		// be configured to use a different config file by default.
 		"-f", "/etc/ld.so.conf",
+		"-C", "/etc/ld.so.cache",
 	}
 
-	if l.ldcacheExists() {
-		args = append(args, "-C", "/etc/ld.so.cache")
-	} else {
-		args = append(args, "-N")
-	}
-
-	// If the ld.so.conf.d directory exists, we create a config file there
-	// containing the required directories, otherwise we add the specified
-	// directories to the ldconfig command directly.
-	if l.ldsoconfdDirectoryExists() {
-		err := createLdsoconfdFile(ldsoconfdFilenamePattern, directories...)
-		if err != nil {
-			return fmt.Errorf("failed to update ld.so.conf.d: %w", err)
-		}
-	} else {
-		args = append(args, directories...)
+	if err := createLdsoconfdFile(ldsoconfdFilenamePattern, directories...); err != nil {
+		return fmt.Errorf("failed to update ld.so.conf.d: %w", err)
 	}
 
 	return SafeExec(ldconfigPath, args, nil)
@@ -126,21 +113,6 @@ func (l *Ldconfig) prepareRoot() (string, error) {
 	return ldconfigPath, nil
 }
 
-func (l *Ldconfig) ldcacheExists() bool {
-	if _, err := os.Stat("/etc/ld.so.cache"); err != nil && os.IsNotExist(err) {
-		return false
-	}
-	return true
-}
-
-func (l *Ldconfig) ldsoconfdDirectoryExists() bool {
-	info, err := os.Stat("/etc/ld.so.conf.d")
-	if os.IsNotExist(err) {
-		return false
-	}
-	return info.IsDir()
-}
-
 // createLdsoconfdFile creates a file at /etc/ld.so.conf.d/.
 // The file is created at /etc/ld.so.conf.d/{{ .pattern }} using `CreateTemp` and
 // contains the specified directories on each line.