问题描述
我们通常在系统安装后使用自定义脚本来设置新的FreeBSD机器，该机器从端口树安装工具并设置系统环境.我们还需要通过freebsd-update将新安装的FreeBSD-8.2机器自动更新为FreeBSD-8.2p3.据我所知，freebsd-update不允许我从没有"cron"选项的shell脚本中执行它.因此，我尝试预加载一个自定义程序来欺骗freebsd-update:
We usually use a custom script to setup new FreeBSD machines after system installation, which installs tools from ports tree and sets up system environment.we also need to automate update newly installed FreeBSD-8.2 machines to FreeBSD-8.2p3 by freebsd-update. As I know, freebsd-update doesn't allow me to execute it from a shell script without a "cron" option. So I try to preload a custom program to cheat freebsd-update:
${CAT} > /tmp/isatty.c <<EOF
int isatty(const int fd) { return 1; }
EOF
${CC} -shared -fPIC -o /tmp/isatty.so /tmp/isatty.c
${ENV} LD_PRELOAD=/tmp/isatty.so LESS="-E" ${FREEBSD_UPDATE} fetch install < /dev/null
通过此调整，我可以从自定义脚本成功运行freebsd-update，但是在freebsd-installer从更新服务器获取文件后，我得到了以下错误消息:
with this tweak, I can sucessfully run freebsd-update from my custom script, but after the freebsd-installer fetched files from update server, I got this error message:
Fetching metadata signature for 8.3-RELEASE from update5.FreeBSD.org... done.
Fetching metadata index... done.
Fetching 2 metadata files... gunzip: standard input is a terminal -- ignoring
metadata is corrupt.
我有机会解决这个问题吗?
Do I have any chance to solve this?
推荐答案
此实用工具可能就是您需要的:空-运行伪终端(PTY)下的访问过程和应用
This utility may be what you need: empty - run processes and applications under pseudo-terminal (PTY)
这样，您应该可以从脚本启动freebsd-update.
This way you should be able start freebsd-update from script.
这篇关于尝试从shell脚本进行freebsd更新时，如何假装成tty?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！