expireover.c patch

[Heath Kehoe]

Currently, if you kill expireover while it's running, it could corrupt
overview (at least, with ovdb) because it doesn't have a chance to
OVclose.  This is a simple fix that allows it to exit cleanly from
a signal.  This is kind of a bug fix, and I think it is appropriate
for inclusion into the 2.3 beta.

-heath


*** expireover.c.DIST	Fri Nov 26 10:49:36 1999
--- expireover.c	Sun Apr 16 17:03:05 2000
***************
*** 20,25 ****
--- 20,32 ----
  	exit(1);
  }
  
+ static int signalled = 0;
+ void sigfunc(int sig)
+ {
+     signalled = 1;
+     xsignal(sig, SIG_DFL);
+ }
+ 
  int main(int argc, char *argv[]) {
      int		i;
      char        activefn[BIG_BUFFER] = "";
***************
*** 104,109 ****
--- 111,120 ----
  	exit(1);
  	}
  
+     xsignal(SIGTERM, sigfunc);
+     xsignal(SIGINT, sigfunc);
+     xsignal(SIGHUP, sigfunc);
+ 
      if (!OVopen(OV_READ | OV_WRITE)) {
  	fprintf(stderr, "expireover: could not open OV database\n");
  	exit(1);
***************
*** 132,137 ****
--- 143,150 ----
  	}
      }
      while ((line = QIOread(qp)) != NULL) {
+ 	if(signalled)
+ 	    break;
  	if ((p = strchr(line, ' ')) != NULL)
  	    *p = '\0';
  	if ((p = strchr(line, '\t')) != NULL)
***************
*** 146,154 ****
  	}
      }
      /* purge deleted newsgroups */
!     if (!Nonull && !OVexpiregroup(NULL, NULL)) {
  	fprintf(stderr, "expireover: could not expire purged newsgroups\n");
      }
      QIOclose(qp);
  
      OVclose();
--- 159,170 ----
  	}
      }
      /* purge deleted newsgroups */
!     if (!signalled && !Nonull && !OVexpiregroup(NULL, NULL)) {
  	fprintf(stderr, "expireover: could not expire purged newsgroups\n");
      }
+     if(signalled)
+ 	fprintf(stderr, "expireover: received signal; exiting\n");
+ 
      QIOclose(qp);
  
      OVclose();