FreeBSD-5.3/usr.sbin/lpr/lpc/movejobs.c
/*
* ------+---------+---------+---------+---------+---------+---------+---------*
* Copyright (c) 2002 - Garance Alistair Drosehn <gad@FreeBSD.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation
* are those of the authors and should not be interpreted as representing
* official policies, either expressed or implied, of the FreeBSD Project
* or FreeBSD, Inc.
*
* ------+---------+---------+---------+---------+---------+---------+---------*
*/
#include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */
__FBSDID("$FreeBSD: src/usr.sbin/lpr/lpc/movejobs.c,v 1.3 2003/07/14 22:24:28 gad Exp $");
/*
* movejobs.c - The lpc commands which move jobs around.
*/
#include <sys/file.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <ctype.h>
#include <dirent.h> /* just for MAXNAMLEN, for job_cfname in lp.h! */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "lp.h"
#include "lpc.h"
#include "matchjobs.h"
#include "extern.h"
/* Values for origcmd in tqbq_common() */
#define IS_TOPQ 1
#define IS_BOTQ 2
static int process_jobs(int _argc, char *_argv[], process_jqe
_process_rtn, void *myinfo);
static process_jqe touch_jqe;
static void tqbq_common(int _argc, char *_argv[], int _origcmd);
/*
* isdigit is defined to work on an 'int', in the range 0 to 255, plus EOF.
* Define a wrapper which can take 'char', either signed or unsigned.
*/
#define isdigitch(Anychar) isdigit(((int) Anychar) & 255)
struct touchjqe_info { /* for topq/bottomq */
time_t newtime;
};
static int nitems;
static struct jobqueue **queue;
/*
* Process all the jobs, as specified by the user.
*/
static int
process_jobs(int argc, char *argv[], process_jqe process_rtn, void *myinfo)
{
struct jobspec_hdr jobs_wanted;
int i, matchcnt, pjres;
STAILQ_INIT(&jobs_wanted);
for (i = 0; i < argc; i++) {
pjres = parse_jobspec(argv[i], &jobs_wanted);
if (pjres == 0) {
printf("\tinvalid job specifier: %s\n", argv[i]);
continue;
}
}
matchcnt = scanq_jobspec(nitems, queue, SCQ_JSORDER, &jobs_wanted,
process_rtn, myinfo);
free_jobspec(&jobs_wanted);
return (matchcnt);
}
/*
* Reposition the job by changing the modification time of the
* control file.
*/
static int
touch_jqe(void *myinfo, struct jobqueue *jq, struct jobspec *jspec)
{
struct timeval tvp[2];
struct touchjqe_info *touch_info;
int ret;
/*
* If the entire queue has been scanned for the current jobspec,
* then let the user know if there were no jobs matched by that
* specification.
*/
if (jq == NULL) {
if (jspec->matchcnt == 0) {
format_jobspec(jspec, FMTJS_VERBOSE);
if (jspec->pluralfmt)
printf("\tjobs %s are not in the queue\n",
jspec->fmtoutput);
else
printf("\tjob %s is not in the queue\n",
jspec->fmtoutput);
}
return (1);
}
/*
* Do a little juggling with "matched" vs "processed", so a single
* job can be matched by multiple specifications, and yet it will
* be moved only once. This is so, eg, 'topq lp 7 7' will not
* complain "job 7 is not in queue" for the second specification.
*/
jq->job_matched = 0;
if (jq->job_processed) {
printf("\tmoved %s earlier\n", jq->job_cfname);
return (1);
}
jq->job_processed = 1;
touch_info = myinfo;
tvp[0].tv_sec = tvp[1].tv_sec = ++touch_info->newtime;
tvp[0].tv_usec = tvp[1].tv_usec = 0;
seteuid(euid);
ret = utimes(jq->job_cfname, tvp);
seteuid(uid);
if (ret == 0) {
if (jspec->matcheduser)
printf("\tmoved %s (user %s)\n", jq->job_cfname,
jspec->matcheduser);
else
printf("\tmoved %s\n", jq->job_cfname);
}
return (ret);
}
/*
* Put the specified jobs at the bottom of printer queue.
*/
void
bottomq_cmd(int argc, char *argv[])
{
if (argc < 3) {
printf("usage: bottomq printer [jobspec ...]\n");
return;
}
--argc; /* First argv was the command name */
++argv;
tqbq_common(argc, argv, IS_BOTQ);
}
/*
* Put the specified jobs at the top of printer queue.
*/
void
topq_cmd(int argc, char *argv[])
{
if (argc < 3) {
printf("usage: topq printer [jobspec ...]\n");
return;
}
--argc; /* First argv was the command name */
++argv;
tqbq_common(argc, argv, IS_TOPQ);
}
/*
* Processing in common between topq and bottomq commands.
*/
void
tqbq_common(int argc, char *argv[], int origcmd)
{
struct printer myprinter, *pp;
struct touchjqe_info touch_info;
int i, movecnt, setres;
pp = setup_myprinter(*argv, &myprinter, SUMP_CHDIR_SD);
if (pp == NULL)
return;
--argc; /* Second argv was the printer name */
++argv;
nitems = getq(pp, &queue);
if (nitems == 0) {
printf("\tthere are no jobs in the queue\n");
free_printer(pp);
return;
}
/*
* The only real difference between topq and bottomq is the
* initial value used for newtime.
*/
switch (origcmd) {
case IS_BOTQ:
/*
* When moving jobs to the bottom of the queue, pick a
* starting value which is one second after the last job
* in the queue.
*/
touch_info.newtime = queue[nitems - 1]->job_time + 1;
break;
case IS_TOPQ:
/*
* When moving jobs to the top of the queue, the greatest
* number of jobs which could be moved is all the jobs
* that are in the queue. Pick a starting value which
* leaves plenty of room for all existing jobs.
*/
touch_info.newtime = queue[0]->job_time - nitems - 5;
break;
default:
printf("\ninternal error in topq/bottomq processing.\n");
return;
}
movecnt = process_jobs(argc, argv, touch_jqe, &touch_info);
/*
* If any jobs were moved, then chmod the lock file to notify any
* active process for this queue that the queue has changed, so
* it will rescan the queue to find out the new job order.
*/
if (movecnt == 0)
printf("\tqueue order unchanged\n");
else {
setres = set_qstate(SQS_QCHANGED, pp->lock_file);
if (setres < 0)
printf("\t* queue order changed for %s, but the\n"
"\t* attempt to set_qstate() failed [%d]!\n",
pp->printer, setres);
}
for (i = 0; i < nitems; i++)
free(queue[i]);
free(queue);
free_printer(pp);
}