293 lines
7.1 KiB
C
293 lines
7.1 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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/*
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static char sccsid[] = "@(#)common.c 8.5 (Berkeley) 4/28/95";
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*/
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static const char rcsid[] =
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"$Id: common.c,v 1.10 1997/12/02 20:45:18 wollman Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <dirent.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "lp.h"
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#include "lp.local.h"
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#include "pathnames.h"
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/*
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* Routines and data common to all the line printer functions.
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*/
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char line[BUFSIZ];
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char *name; /* program name */
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extern uid_t uid, euid;
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static int compar __P((const void *, const void *));
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/*
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* Getline reads a line from the control file cfp, removes tabs, converts
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* new-line to null and leaves it in line.
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* Returns 0 at EOF or the number of characters read.
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*/
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int
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getline(cfp)
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FILE *cfp;
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{
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register int linel = 0;
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register char *lp = line;
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register int c;
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while ((c = getc(cfp)) != '\n' && linel+1 < sizeof(line)) {
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if (c == EOF)
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return(0);
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if (c == '\t') {
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do {
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*lp++ = ' ';
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linel++;
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} while ((linel & 07) != 0 && linel+1 < sizeof(line));
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continue;
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}
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*lp++ = c;
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linel++;
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}
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*lp++ = '\0';
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return(linel);
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}
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/*
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* Scan the current directory and make a list of daemon files sorted by
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* creation time.
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* Return the number of entries and a pointer to the list.
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*/
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int
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getq(pp, namelist)
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const struct printer *pp;
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struct queue *(*namelist[]);
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{
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register struct dirent *d;
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register struct queue *q, **queue;
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register int nitems;
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struct stat stbuf;
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DIR *dirp;
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int arraysz;
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seteuid(euid);
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if ((dirp = opendir(pp->spool_dir)) == NULL)
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return(-1);
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if (fstat(dirp->dd_fd, &stbuf) < 0)
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goto errdone;
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seteuid(uid);
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/*
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* Estimate the array size by taking the size of the directory file
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* and dividing it by a multiple of the minimum size entry.
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*/
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arraysz = (stbuf.st_size / 24);
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queue = (struct queue **)malloc(arraysz * sizeof(struct queue *));
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if (queue == NULL)
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goto errdone;
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nitems = 0;
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while ((d = readdir(dirp)) != NULL) {
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if (d->d_name[0] != 'c' || d->d_name[1] != 'f')
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continue; /* daemon control files only */
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seteuid(euid);
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if (stat(d->d_name, &stbuf) < 0)
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continue; /* Doesn't exist */
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seteuid(uid);
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q = (struct queue *)malloc(sizeof(time_t)+strlen(d->d_name)+1);
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if (q == NULL)
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goto errdone;
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q->q_time = stbuf.st_mtime;
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strcpy(q->q_name, d->d_name);
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/*
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* Check to make sure the array has space left and
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* realloc the maximum size.
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*/
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if (++nitems > arraysz) {
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arraysz *= 2;
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queue = (struct queue **)realloc((char *)queue,
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arraysz * sizeof(struct queue *));
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if (queue == NULL)
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goto errdone;
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}
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queue[nitems-1] = q;
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}
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closedir(dirp);
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if (nitems)
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qsort(queue, nitems, sizeof(struct queue *), compar);
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*namelist = queue;
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return(nitems);
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errdone:
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closedir(dirp);
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return(-1);
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}
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/*
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* Compare modification times.
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*/
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static int
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compar(p1, p2)
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const void *p1, *p2;
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{
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if ((*(struct queue **)p1)->q_time < (*(struct queue **)p2)->q_time)
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return(-1);
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if ((*(struct queue **)p1)->q_time > (*(struct queue **)p2)->q_time)
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return(1);
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return(0);
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}
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/* sleep n milliseconds */
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void
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delay(n)
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int n;
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{
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struct timeval tdelay;
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if (n <= 0 || n > 10000)
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fatal((struct printer *)0, /* fatal() knows how to deal */
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"unreasonable delay period (%d)", n);
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tdelay.tv_sec = n / 1000;
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tdelay.tv_usec = n * 1000 % 1000000;
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(void) select(0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &tdelay);
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}
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char *
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lock_file_name(pp, buf, len)
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const struct printer *pp;
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char *buf;
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size_t len;
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{
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static char staticbuf[MAXPATHLEN];
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if (buf == 0)
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buf = staticbuf;
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if (len == 0)
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len = MAXPATHLEN;
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if (pp->lock_file[0] == '/') {
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buf[0] = '\0';
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strncpy(buf, pp->lock_file, len);
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} else {
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snprintf(buf, len, "%s/%s", pp->spool_dir, pp->lock_file);
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}
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return buf;
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}
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char *
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status_file_name(pp, buf, len)
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const struct printer *pp;
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char *buf;
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size_t len;
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{
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static char staticbuf[MAXPATHLEN];
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if (buf == 0)
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buf = staticbuf;
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if (len == 0)
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len = MAXPATHLEN;
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if (pp->status_file[0] == '/') {
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buf[0] = '\0';
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strncpy(buf, pp->status_file, len);
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} else {
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snprintf(buf, len, "%s/%s", pp->spool_dir, pp->status_file);
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}
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return buf;
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}
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#ifdef __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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void
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#ifdef __STDC__
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fatal(const struct printer *pp, const char *msg, ...)
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#else
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fatal(pp, msg, va_alist)
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const struct printer *pp;
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char *msg;
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va_dcl
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#endif
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{
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va_list ap;
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#ifdef __STDC__
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va_start(ap, msg);
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#else
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va_start(ap);
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#endif
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if (from != host)
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(void)printf("%s: ", host);
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(void)printf("%s: ", name);
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if (pp && pp->printer)
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(void)printf("%s: ", pp->printer);
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(void)vprintf(msg, ap);
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va_end(ap);
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(void)putchar('\n');
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exit(1);
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}
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/*
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* Close all file descriptors from START on up.
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* This is a horrific kluge, since getdtablesize() might return
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* ``infinity'', in which case we will be spending a long time
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* closing ``files'' which were never open. Perhaps it would
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* be better to close the first N fds, for some small value of N.
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*/
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void
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closeallfds(start)
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int start;
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{
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int stop = getdtablesize();
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for (; start < stop; start++)
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close(start);
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}
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