ref: 1feadc683b7c15c2fa9ffc76fabbf3599fd26962
dir: /rc/bin/sysupdate/
#!/bin/rc -b rfork en cd / if(! test -d .git) bind -ac /dist/plan9front / if(! ~ `{git/branch} heads/front) >[1=2] echo sysupdate: must be on "front" to pull if not git/pull -u gits://git.9front.org/plan9front/plan9front