In FreeBSD as in most other Operating Systems, the boot process consist of starting a set of scripts\/services\/daemons\/processes. Each of those has constraints like depending-on or starting before other scripts for instance.<\/p>\n
On a default FreeBSD install, this order would be determined by the packages you install, each of them installing a script in What, however, if you wanted to change the order of the boot process? For instance, you have a script that by default starts just after the network is ready, but in your case, it specifically has to start after another script for everything to work properly.<\/p>\n Well, I was confronted to that particular problem, and the answer is cross-dependency-scripts<\/i> or whatever you want to call them. If you changed the order dependency in script B and C directly, that change would be overwritten on the next package update. Instead we add two empty scripts __B and __C that will just enforce the dependence. That is, __B starts after D and before B, __C starts after B and before C.<\/p>\n Looking at the code, at the beginning of the original scripts you would find:<\/p>\n Thus you would add two scripts __B and __D that contains:<\/p>\n In FreeBSD as in most other Operating Systems, the boot process consist of starting a set of scripts\/services\/daemons\/processes. Each of those has constraints like depending-on or starting before other scripts for instance. On a default FreeBSD install, this order would … Continue reading \/usr\/local\/etc\/rc.d<\/code> that specifies its constraints requirements.<\/p>\n
\nSuppose that you have the following scripts in your boot process: A, B, C, D. By default, B, C and D start just after A. But you want to change that so B starts after D and C starts after B.<\/p>\n\r\n-- rc.d\/A\r\n#!\/bin\/sh\r\n\r\n# PROVIDE: A\r\n<\/pre>\n
\r\n-- rc.d\/B\r\n#!\/bin\/sh\r\n\r\n# PROVIDE: B\r\n# REQUIRE: A\r\n<\/pre>\n
\r\n-- rc.d\/C\r\n#!\/bin\/sh\r\n\r\n# PROVIDE: C\r\n# REQUIRE: A\r\n<\/pre>\n
\r\n-- rc.d\/D\r\n#!\/bin\/sh\r\n\r\n# PROVIDE: D\r\n# REQUIRE: A\r\n<\/pre>\n
\r\n-- rc.d\/__B\r\n#!\/bin\/sh\r\n\r\n# PROVIDE: __B\r\n# REQUIRE: D\r\n# BEFORE: B\r\n<\/pre>\n
\r\n-- rc.d\/__C\r\n#!\/bin\/sh\r\n\r\n# PROVIDE: __C\r\n# REQUIRE: B\r\n# BEFORE: C\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"