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NAME

     rc_deptree_update, rc_deptree_update_needed, rc_deptree_load,
     rc_deptree_depend, rc_deptree_depends, rc_deptree_order, rc_deptree_free
     — RC dependency tree functions

LIBRARY

     Run Command library (librc, -lrc)

SYNOPSIS

     #include <rc.h>

     bool
     rc_deptree_update(void);

     bool
     rc_deptree_update_needed(void);

     RC_DEPTREE
     rc_deptree_load(void);

     RC_STRINGLIST *
     rc_deptree_depend(const RC_DEPTREE *deptree, const char *type,
         const char *service);

     bool
     rc_deptree_depends(const RC_DEPTREE *deptree, const char *const *types,
         const char *const *services, const char *runlevel, int options);

     RC_STRINGLIST *
     rc_deptree_order(const RC_DEPTREE *deptree, const char *runlevel,
         int options);

     void
     rc_deptree_free(RC_DEPTREE *deptree);

DESCRIPTION

     These functions provide a means of querying the dependencies of OpenRC
     services.

     rc_deptree_update() updates the service dependency tree, normally
     /lib/rc/init.d/deptree.  rc_deptree_update_needed() checks to see if the
     dependency tree needs updated based on the mtime of it compared to
     /etc/init.d, /etc/conf.d, /usr/local/etc/init.d, /usr/local/etc/conf.d,
     /etc/rc.conf and any files specified by a service.

     rc_deptree_load() loads the deptree and returns a pointer to it which
     needs to be freed by rc_deptree_free() when done.

     rc_deptree_depend(), rc_deptree_depends() and rc_deptree_order() return a
     list of services from the deptree based on the type or types of
     dependency.  options can be a bitmask of RC_DEP_TRACE and RC_DEP_STRICT.
     RC_DEP_TRACE follows each services dependencies right down to the first
     service needed and RC_DEP_STRICT only lists services actually needed or
     in the runlevel.

IMPLEMENTATION NOTES

     Each function that returns RC_STRINGLIST * should be freed by calling
     rc_stringlist_free() when done.

SEE ALSO

     malloc(3), free(3), rc_stringlist_free(3), openrc-run(8)

AUTHORS

     Roy Marples <roy@marples.name>



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