NetBSD/usr.sbin/cron/job.c

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/* $NetBSD: job.c,v 1.6 2005/03/16 02:53:55 xtraeme Exp $ */
1997-03-13 09:19:07 +03:00
1994-01-12 21:35:59 +03:00
/* Copyright 1988,1990,1993,1994 by Paul Vixie
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* All rights reserved
*
* Distribute freely, except: don't remove my name from the source or
* documentation (don't take credit for my work), mark your changes (don't
* get me blamed for your possible bugs), don't alter or remove this
* notice. May be sold if buildable source is provided to buyer. No
* warrantee of any kind, express or implied, is included with this
* software; use at your own risk, responsibility for damages (if any) to
* anyone resulting from the use of this software rests entirely with the
* user.
*
* Send bug reports, bug fixes, enhancements, requests, flames, etc., and
* I'll try to keep a version up to date. I can be reached as follows:
* Paul Vixie <paul@vix.com> uunet!decwrl!vixie!paul
*/
#include <sys/cdefs.h>
#include <errno.h>
#if SYS_TIME_H
# include <sys/time.h>
#else
# include <time.h>
#endif
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#if !defined(lint) && !defined(LINT)
#if 0
static char rcsid[] = "Id: job.c,v 1.6 1994/01/15 20:43:43 vixie Exp";
#else
__RCSID("$NetBSD: job.c,v 1.6 2005/03/16 02:53:55 xtraeme Exp $");
#endif
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#endif
#include "cron.h"
typedef struct _job {
struct _job *next;
entry *e;
user *u;
time_t t;
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} job;
static job *jhead = NULL, *jtail = NULL;
static int okay_to_go(job *);
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void
job_add(entry *e, user *u)
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{
job *j;
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/* if already on queue, keep going */
for (j=jhead; j; j=j->next)
if (j->e == e && j->u == u) {
j->t = TargetTime;
return;
}
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/* build a job queue element */
j = (job*)malloc(sizeof(job));
j->next = (job*) NULL;
j->e = e;
j->u = u;
j->t = TargetTime;
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/* add it to the tail */
if (!jhead) { jhead=j; }
else { jtail->next=j; }
jtail = j;
}
int
job_runqueue(void)
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{
job *j, *jn;
int run = 0;
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for (j=jhead; j; j=jn) {
if (okay_to_go(j))
do_command(j->e, j->u);
else {
char *x = mkprints((u_char *)j->e->cmd,
strlen(j->e->cmd));
char *usernm = env_get("LOGNAME", j->e->envp);
log_it(usernm, getpid(), "CMD (skipped)", x);
free(x);
}
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jn = j->next;
free(j);
run++;
}
jhead = jtail = NULL;
return run;
}
static int
okay_to_go(job *j)
{
char *within, *t;
int delta;
if (j->e->flags & WHEN_REBOOT)
return (1);
within = env_get("CRON_WITHIN", j->e->envp);
if (within == NULL)
return (1);
/* XXX handle 2m, 4h, etc? */
errno = 0;
delta = strtol(within, &t, 10);
if (errno == ERANGE || *t != '\0' || delta <= 0)
return (1);
return ((j->t + delta) > time(NULL));
}