1、symlink

init rc中 使用symlink 方法

symlink old_path new_path

如果遇到symlink 失败问题 可以参考这篇文章 [Android6.0 init.rc中创建符号链接失败问题] (https://blog.csdn.net/kc58236582/article/details/50424966)
)
TBD:
关于init rc的介绍

2、在Android mk中使用ln -sf命令

参考system/core/toolbox/Andoird.mk

# We build BSD grep separately, so it can provide egrep and fgrep too.
include $(CLEAR_VARS)
LOCAL_SRC_FILES := \
    upstream-netbsd/usr.bin/grep/fastgrep.c \
    upstream-netbsd/usr.bin/grep/file.c \
    upstream-netbsd/usr.bin/grep/grep.c \
    upstream-netbsd/usr.bin/grep/queue.c \
    upstream-netbsd/usr.bin/grep/util.c
LOCAL_CFLAGS += $(common_cflags)
LOCAL_MODULE := grep
LOCAL_POST_INSTALL_CMD := $(hide) $(foreach t,egrep fgrep,ln -sf grep $(TARGET_OUT)/bin/$(t);)
include $(BUILD_EXECUTABLE)