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Re: How to define variables using a plugin


From: Adrian Phillips
Subject: Re: How to define variables using a plugin
Date: 01 Aug 2001 10:51:46 +0200
User-agent: Gnus/5.0807 (Gnus v5.8.7) Emacs/20.7

>>>>> "Adrian" == Adrian Phillips <address@hidden> writes:

    Adrian> Good day,

    Adrian> I'm trying to define variables using a shell script as a
    Adrian> plugin but the variables are not being used in actions
    Adrian> later in the actionsequence. Is this possible ?

    Adrian> A simple example :-

    Adrian> control:

    Adrian>         domain = ( oslo.dnmi.no )

    Adrian>         master_server = ( freeze )

    Adrian>         actionsequence = ( "module:defvars ${cache}" copy
    Adrian> )

    Adrian> copy:

    Adrian>         ${kernel_dir} server=${master_server} exclude=*~
    Adrian> dest=/usr/src recurse=1

Okay, I tried 2.0.a11 but it still didn't work and I must admit not
knowing how it is supposed to work either. I fixed it with the
following patch but this only handles variables in a copy action and
doesn't help with the underlying problem with variables being defined
by a plugin not being used in actions.

Sincerely,

Adrian

diff -u -r cfengine-2.0.a11/src/do.c cfengine-2.0.a11.new/src/do.c
--- cfengine-2.0.a11/src/do.c   Fri Jun  8 18:32:17 2001
+++ cfengine-2.0.a11.new/src/do.c       Wed Aug  1 10:43:41 2001
@@ -2209,17 +2209,20 @@
 { struct Image *ip;
   struct Item *svp;
   struct stat statbuf;
-  struct servent *server;
+  struct servent *serverent;
   int savesilent;
+  char path[bufsize];
+  char destination[bufsize];
+  char server[bufsize];
 
-if ((server = getservbyname(CFENGINE_SERVICE,"tcp")) == NULL)
+if ((serverent = getservbyname(CFENGINE_SERVICE,"tcp")) == NULL)
    {
    CfLog(cfverbose,"Remember to register cfengine in /etc/services: cfengine 
5308/tcp\n","getservbyname");
    PORTNUMBER = htons((unsigned short)5308);
    }
 else
    {
-   PORTNUMBER = (unsigned short)(server->s_port); /* already in network order 
*/
+   PORTNUMBER = (unsigned short)(serverent->s_port); /* already in network 
order */
    }
  
 for (svp = VSERVERLIST; svp != NULL; svp=svp->next) /* order servers */
@@ -2261,7 +2264,21 @@
    
       IMAGEBACKUP = true;
       
-      Verbose("Checking copy from %s:%s to 
%s\n",ip->server,ip->path,ip->destination);
+         /* Convert any variables to their values */
+         if (IsVarString(ip->server))
+               ExpandVarstring(ip->server,server,"");
+         else
+               strncpy (server, ip->server, sizeof(server));
+         if (IsVarString(ip->path))
+               ExpandVarstring(ip->path,path,"");
+         else
+               strncpy (path, ip->path, sizeof(path));
+         if (IsVarString(ip->destination))
+               ExpandVarstring(ip->destination,destination,"");
+         else
+               strncpy (destination, ip->destination, sizeof(destination));    
        
+
+      Verbose("Checking copy from %s:%s to %s\n",server,path,destination);
       
       savesilent = SILENT;
       
@@ -2272,7 +2289,7 @@
       
       ResetOutputRoute(ip->log,ip->inform);
       
-      snprintf(VBUFF,bufsize,"%.50s.%.50s",ip->path,ip->destination); /* 
Unique ID for copy locking */
+      snprintf(VBUFF,bufsize,"%.50s.%.50s",path,destination); /* Unique ID for 
copy locking */
 
       if 
(!GetLock(ASUniqueName("copy"),CanonifyName(VBUFF),VIFELAPSED,VEXPIREAFTER,VUQNAME,CFSTARTTIME))
         {
@@ -2283,9 +2300,9 @@
       
       IMAGEBACKUP = ip->backup;
       
-      if (cfstat(ip->path,&statbuf,ip) == -1)
+      if (cfstat(path,&statbuf,ip) == -1)
         {
-        snprintf(OUTPUT,bufsize*2,"Can't stat %s in copy\n",ip->path);
+        snprintf(OUTPUT,bufsize*2,"Can't stat %s in copy\n",path);
         CfLog(cfinform,OUTPUT,"");
         ReleaseCurrentLock();
         SILENT = savesilent;
@@ -2293,7 +2310,7 @@
         continue;
         }
       
-      if (strncmp(ip->destination,"home",4) == 0)
+      if (strncmp(destination,"home",4) == 0)
         {
         HOMECOPY = true;          /* Don't send home backups to repository */
         CheckHomeImages(ip);
@@ -2307,11 +2324,11 @@
               {
               Verbose("%s: (Destination purging enabled)\n",VPREFIX);
               }
-           RecursiveImage(ip,ip->path,ip->destination,ip->recurse);
+           RecursiveImage(ip,path,destination,ip->recurse);
            }
         else
            {
-           if (! MakeDirectoriesFor(ip->destination))
+           if (! MakeDirectoriesFor(destination))
               {
               ReleaseCurrentLock();
               SILENT = savesilent;
@@ -2319,7 +2336,7 @@
               continue;
               }
            
-           CheckImage(ip->path,ip->destination,ip);
+           CheckImage(path,destination,ip);
            }
         }
       



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