2.11BSD#431 - /usr/src/usr.sbin/cron/job.c

   1: /* Copyright 1988,1990,1993,1994 by Paul Vixie
   2:  * All rights reserved
   3:  *
   4:  * Distribute freely, except: don't remove my name from the source or
   5:  * documentation (don't take credit for my work), mark your changes (don't
   6:  * get me blamed for your possible bugs), don't alter or remove this
   7:  * notice.  May be sold if buildable source is provided to buyer.  No
   8:  * warrantee of any kind, express or implied, is included with this
   9:  * software; use at your own risk, responsibility for damages (if any) to
  10:  * anyone resulting from the use of this software rests entirely with the
  11:  * user.
  12:  *
  13:  * Send bug reports, bug fixes, enhancements, requests, flames, etc., and
  14:  * I'll try to keep a version up to date.  I can be reached as follows:
  15:  * Paul Vixie          <paul@vix.com>          uunet!decwrl!vixie!paul
  16:  */
  17: 
  18: #if !defined(lint) && !defined(LINT)
  19: static char rcsid[] = "$Id: job.c,v 1.6 1994/01/15 20:43:43 vixie Exp $";
  20: #endif
  21: 
  22: 
  23: #include "cron.h"
  24: 
  25: 
  26: typedef struct _job {
  27:     struct _job *next;
  28:     entry       *e;
  29:     user        *u;
  30: } job;
  31: 
  32: 
  33: static job  *jhead = NULL, *jtail = NULL;
  34: 
  35: 
  36: void
  37: job_add(e, u)
  38:     register entry *e;
  39:     register user *u;
  40: {
  41:     register job *j;
  42: 
  43:     /* if already on queue, keep going */
  44:     for (j=jhead; j; j=j->next)
  45:         if (j->e == e && j->u == u) { return; }
  46: 
  47:     /* build a job queue element */
  48:     j = (job*)malloc(sizeof(job));
  49:     j->next = (job*) NULL;
  50:     j->e = e;
  51:     j->u = u;
  52: 
  53:     /* add it to the tail */
  54:     if (!jhead) { jhead=j; }
  55:     else { jtail->next=j; }
  56:     jtail = j;
  57: }
  58: 
  59: 
  60: int
  61: job_runqueue()
  62: {
  63:     register job    *j, *jn;
  64:     register int    run = 0;
  65: 
  66:     for (j=jhead; j; j=jn) {
  67:         do_command(j->e, j->u);
  68:         jn = j->next;
  69:         free(j);
  70:         run++;
  71:     }
  72:     jhead = jtail = NULL;
  73:     return run;
  74: }

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