721 lines
16 KiB
C
721 lines
16 KiB
C
/*
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* Copyright (c) 1983 Regents of the University of California.
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* All rights reserved.
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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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char copyright[] =
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"@(#) Copyright (c) 1983, 1989 Regents of the University of California.\n\
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All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)lpr.c 5.9 (Berkeley) 3/2/91";
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#endif /* not lint */
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/*
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* lpr -- off line print
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*
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* Allows multiple printers and printers on remote machines by
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* using information from a printer data base.
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <pwd.h>
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#include <grp.h>
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#include <signal.h>
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#include <ctype.h>
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#include <syslog.h>
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#include "lp.local.h"
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#include "pathnames.h"
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char *tfname; /* tmp copy of cf before linking */
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char *cfname; /* daemon control files, linked from tf's */
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char *dfname; /* data files */
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int nact; /* number of jobs to act on */
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int tfd; /* control file descriptor */
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int mailflg; /* send mail */
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int qflag; /* q job, but don't exec daemon */
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char format = 'f'; /* format char for printing files */
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int rflag; /* remove files upon completion */
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int sflag; /* symbolic link flag */
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int inchar; /* location to increment char in file names */
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int ncopies = 1; /* # of copies to make */
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int iflag; /* indentation wanted */
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int indent; /* amount to indent */
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int hdr = 1; /* print header or not (default is yes) */
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int userid; /* user id */
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char *person; /* user name */
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char *title; /* pr'ing title */
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char *fonts[4]; /* troff font names */
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char *width; /* width for versatec printing */
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char host[32]; /* host name */
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char *class = host; /* class title on header page */
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char *jobname; /* job name on header page */
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char *name; /* program name */
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char *printer; /* printer name */
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struct stat statb;
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int MX; /* maximum number of blocks to copy */
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int MC; /* maximum number of copies allowed */
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int DU; /* daemon user-id */
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char *SD; /* spool directory */
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char *LO; /* lock file name */
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char *RG; /* restrict group */
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short SC; /* suppress multiple copies */
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char *getenv();
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char *rindex();
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char *linked();
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void cleanup();
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/*ARGSUSED*/
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main(argc, argv)
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int argc;
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char *argv[];
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{
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struct passwd *pw;
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struct group *gptr;
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extern char *itoa();
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register char *arg, *cp;
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char buf[BUFSIZ];
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int i, f;
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struct stat stb;
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if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
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signal(SIGHUP, cleanup);
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if (signal(SIGINT, SIG_IGN) != SIG_IGN)
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signal(SIGINT, cleanup);
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if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
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signal(SIGQUIT, cleanup);
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if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
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signal(SIGTERM, cleanup);
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name = argv[0];
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gethostname(host, sizeof (host));
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openlog("lpd", 0, LOG_LPR);
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while (argc > 1 && argv[1][0] == '-') {
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argc--;
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arg = *++argv;
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switch (arg[1]) {
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case 'P': /* specifiy printer name */
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if (arg[2])
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printer = &arg[2];
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else if (argc > 1) {
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argc--;
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printer = *++argv;
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}
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break;
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case 'C': /* classification spec */
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hdr++;
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if (arg[2])
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class = &arg[2];
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else if (argc > 1) {
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argc--;
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class = *++argv;
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}
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break;
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case 'U': /* user name */
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hdr++;
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if (arg[2])
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person = &arg[2];
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else if (argc > 1) {
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argc--;
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person = *++argv;
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}
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break;
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case 'J': /* job name */
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hdr++;
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if (arg[2])
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jobname = &arg[2];
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else if (argc > 1) {
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argc--;
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jobname = *++argv;
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}
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break;
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case 'T': /* pr's title line */
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if (arg[2])
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title = &arg[2];
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else if (argc > 1) {
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argc--;
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title = *++argv;
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}
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break;
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case 'l': /* literal output */
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case 'p': /* print using ``pr'' */
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case 't': /* print troff output (cat files) */
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case 'n': /* print ditroff output */
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case 'd': /* print tex output (dvi files) */
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case 'g': /* print graph(1G) output */
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case 'c': /* print cifplot output */
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case 'v': /* print vplot output */
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format = arg[1];
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break;
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case 'f': /* print fortran output */
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format = 'r';
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break;
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case '4': /* troff fonts */
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case '3':
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case '2':
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case '1':
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if (argc > 1) {
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argc--;
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fonts[arg[1] - '1'] = *++argv;
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}
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break;
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case 'w': /* versatec page width */
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width = arg+2;
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break;
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case 'r': /* remove file when done */
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rflag++;
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break;
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case 'm': /* send mail when done */
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mailflg++;
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break;
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case 'h': /* toggle want of header page */
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hdr = !hdr;
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break;
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case 's': /* try to link files */
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sflag++;
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break;
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case 'q': /* just q job */
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qflag++;
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break;
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case 'i': /* indent output */
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iflag++;
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indent = arg[2] ? atoi(&arg[2]) : 8;
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break;
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case '#': /* n copies */
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if (isdigit(arg[2])) {
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i = atoi(&arg[2]);
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if (i > 0)
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ncopies = i;
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}
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}
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}
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if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
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printer = DEFLP;
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chkprinter(printer);
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if (SC && ncopies > 1)
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fatal("multiple copies are not allowed");
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if (MC > 0 && ncopies > MC)
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fatal("only %d copies are allowed", MC);
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/*
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* Get the identity of the person doing the lpr using the same
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* algorithm as lprm.
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*/
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userid = getuid();
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if (userid != DU || person == 0) {
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if ((pw = getpwuid(userid)) == NULL)
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fatal("Who are you?");
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person = pw->pw_name;
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}
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/*
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* Check for restricted group access.
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*/
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if (RG != NULL && userid != DU) {
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if ((gptr = getgrnam(RG)) == NULL)
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fatal("Restricted group specified incorrectly");
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if (gptr->gr_gid != getgid()) {
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while (*gptr->gr_mem != NULL) {
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if ((strcmp(person, *gptr->gr_mem)) == 0)
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break;
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gptr->gr_mem++;
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}
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if (*gptr->gr_mem == NULL)
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fatal("Not a member of the restricted group");
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}
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}
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/*
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* Check to make sure queuing is enabled if userid is not root.
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*/
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(void) sprintf(buf, "%s/%s", SD, LO);
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if (userid && stat(buf, &stb) == 0 && (stb.st_mode & 010))
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fatal("Printer queue is disabled");
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/*
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* Initialize the control file.
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*/
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mktemps();
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tfd = nfile(tfname);
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(void) fchown(tfd, DU, -1); /* owned by daemon for protection */
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card('H', host);
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card('P', person);
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if (hdr) {
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if (jobname == NULL) {
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if (argc == 1)
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jobname = "stdin";
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else
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jobname = (arg = rindex(argv[1], '/')) ? arg+1 : argv[1];
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}
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card('J', jobname);
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card('C', class);
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card('L', person);
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}
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if (iflag)
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card('I', itoa(indent));
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if (mailflg)
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card('M', person);
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if (format == 't' || format == 'n' || format == 'd')
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for (i = 0; i < 4; i++)
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if (fonts[i] != NULL)
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card('1'+i, fonts[i]);
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if (width != NULL)
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card('W', width);
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/*
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* Read the files and spool them.
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*/
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if (argc == 1)
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copy(0, " ");
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else while (--argc) {
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if ((f = test(arg = *++argv)) < 0)
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continue; /* file unreasonable */
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if (sflag && (cp = linked(arg)) != NULL) {
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(void) sprintf(buf, "%d %d", statb.st_dev, statb.st_ino);
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card('S', buf);
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if (format == 'p')
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card('T', title ? title : arg);
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for (i = 0; i < ncopies; i++)
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card(format, &dfname[inchar-2]);
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card('U', &dfname[inchar-2]);
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if (f)
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card('U', cp);
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card('N', arg);
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dfname[inchar]++;
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nact++;
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continue;
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}
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if (sflag)
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printf("%s: %s: not linked, copying instead\n", name, arg);
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if ((i = open(arg, O_RDONLY)) < 0) {
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printf("%s: cannot open %s\n", name, arg);
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continue;
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}
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copy(i, arg);
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(void) close(i);
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if (f && unlink(arg) < 0)
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printf("%s: %s: not removed\n", name, arg);
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}
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if (nact) {
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(void) close(tfd);
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tfname[inchar]--;
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/*
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* Touch the control file to fix position in the queue.
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*/
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if ((tfd = open(tfname, O_RDWR)) >= 0) {
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char c;
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if (read(tfd, &c, 1) == 1 && lseek(tfd, 0L, 0) == 0 &&
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write(tfd, &c, 1) != 1) {
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printf("%s: cannot touch %s\n", name, tfname);
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tfname[inchar]++;
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cleanup();
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}
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(void) close(tfd);
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}
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if (link(tfname, cfname) < 0) {
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printf("%s: cannot rename %s\n", name, cfname);
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tfname[inchar]++;
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cleanup();
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}
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unlink(tfname);
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if (qflag) /* just q things up */
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exit(0);
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if (!startdaemon(printer))
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printf("jobs queued, but cannot start daemon.\n");
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exit(0);
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}
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cleanup();
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/* NOTREACHED */
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}
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/*
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* Create the file n and copy from file descriptor f.
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*/
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copy(f, n)
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int f;
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char n[];
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{
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register int fd, i, nr, nc;
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char buf[BUFSIZ];
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if (format == 'p')
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card('T', title ? title : n);
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for (i = 0; i < ncopies; i++)
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card(format, &dfname[inchar-2]);
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card('U', &dfname[inchar-2]);
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card('N', n);
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fd = nfile(dfname);
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nr = nc = 0;
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while ((i = read(f, buf, BUFSIZ)) > 0) {
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if (write(fd, buf, i) != i) {
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printf("%s: %s: temp file write error\n", name, n);
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break;
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}
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nc += i;
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if (nc >= BUFSIZ) {
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nc -= BUFSIZ;
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nr++;
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if (MX > 0 && nr > MX) {
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printf("%s: %s: copy file is too large\n", name, n);
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break;
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}
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}
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}
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(void) close(fd);
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if (nc==0 && nr==0)
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printf("%s: %s: empty input file\n", name, f ? n : "stdin");
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else
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nact++;
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}
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/*
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* Try and link the file to dfname. Return a pointer to the full
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* path name if successful.
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*/
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char *
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linked(file)
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register char *file;
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{
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register char *cp;
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static char buf[BUFSIZ];
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if (*file != '/') {
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if (getwd(buf) == NULL)
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return(NULL);
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while (file[0] == '.') {
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switch (file[1]) {
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case '/':
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file += 2;
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continue;
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case '.':
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if (file[2] == '/') {
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if ((cp = rindex(buf, '/')) != NULL)
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*cp = '\0';
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file += 3;
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continue;
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}
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}
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break;
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}
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strcat(buf, "/");
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strcat(buf, file);
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file = buf;
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}
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return(symlink(file, dfname) ? NULL : file);
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}
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|
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/*
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* Put a line into the control file.
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*/
|
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card(c, p2)
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register char c, *p2;
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{
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char buf[BUFSIZ];
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register char *p1 = buf;
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register int len = 2;
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|
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*p1++ = c;
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while ((c = *p2++) != '\0') {
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*p1++ = (c == '\n') ? ' ' : c;
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len++;
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}
|
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*p1++ = '\n';
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write(tfd, buf, len);
|
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}
|
|
|
|
/*
|
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* Create a new file in the spool directory.
|
|
*/
|
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nfile(n)
|
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char *n;
|
|
{
|
|
register f;
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int oldumask = umask(0); /* should block signals */
|
|
|
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f = open(n, O_CREAT|O_WRONLY|O_TRUNC|O_EXCL, FILMOD);
|
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(void) umask(oldumask);
|
|
if (f < 0) {
|
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printf("%s: cannot create %s\n", name, n);
|
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cleanup();
|
|
}
|
|
if (fchown(f, userid, -1) < 0) {
|
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printf("%s: cannot chown %s\n", name, n);
|
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cleanup();
|
|
}
|
|
if (++n[inchar] > 'z') {
|
|
if (++n[inchar-2] == 't') {
|
|
printf("too many files - break up the job\n");
|
|
cleanup();
|
|
}
|
|
n[inchar] = 'A';
|
|
} else if (n[inchar] == '[')
|
|
n[inchar] = 'a';
|
|
return(f);
|
|
}
|
|
|
|
/*
|
|
* Cleanup after interrupts and errors.
|
|
*/
|
|
void
|
|
cleanup()
|
|
{
|
|
register i;
|
|
|
|
signal(SIGHUP, SIG_IGN);
|
|
signal(SIGINT, SIG_IGN);
|
|
signal(SIGQUIT, SIG_IGN);
|
|
signal(SIGTERM, SIG_IGN);
|
|
i = inchar;
|
|
if (tfname)
|
|
do
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|
unlink(tfname);
|
|
while (tfname[i]-- != 'A');
|
|
if (cfname)
|
|
do
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|
unlink(cfname);
|
|
while (cfname[i]-- != 'A');
|
|
if (dfname)
|
|
do {
|
|
do
|
|
unlink(dfname);
|
|
while (dfname[i]-- != 'A');
|
|
dfname[i] = 'z';
|
|
} while (dfname[i-2]-- != 'd');
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* Test to see if this is a printable file.
|
|
* Return -1 if it is not, 0 if its printable, and 1 if
|
|
* we should remove it after printing.
|
|
*/
|
|
test(file)
|
|
char *file;
|
|
{
|
|
struct exec execb;
|
|
register int fd;
|
|
register char *cp;
|
|
|
|
if (access(file, 4) < 0) {
|
|
printf("%s: cannot access %s\n", name, file);
|
|
return(-1);
|
|
}
|
|
if (stat(file, &statb) < 0) {
|
|
printf("%s: cannot stat %s\n", name, file);
|
|
return(-1);
|
|
}
|
|
if ((statb.st_mode & S_IFMT) == S_IFDIR) {
|
|
printf("%s: %s is a directory\n", name, file);
|
|
return(-1);
|
|
}
|
|
if (statb.st_size == 0) {
|
|
printf("%s: %s is an empty file\n", name, file);
|
|
return(-1);
|
|
}
|
|
if ((fd = open(file, O_RDONLY)) < 0) {
|
|
printf("%s: cannot open %s\n", name, file);
|
|
return(-1);
|
|
}
|
|
#ifndef LINUX
|
|
if (read(fd, &execb, sizeof(execb)) == sizeof(execb))
|
|
switch(execb.a_magic) {
|
|
case A_MAGIC1:
|
|
case A_MAGIC2:
|
|
case A_MAGIC3:
|
|
#ifdef A_MAGIC4
|
|
case A_MAGIC4:
|
|
#endif
|
|
printf("%s: %s is an executable program", name, file);
|
|
goto error1;
|
|
|
|
case ARMAG:
|
|
printf("%s: %s is an archive file", name, file);
|
|
goto error1;
|
|
}
|
|
#endif
|
|
(void) close(fd);
|
|
if (rflag) {
|
|
if ((cp = rindex(file, '/')) == NULL) {
|
|
if (access(".", 2) == 0)
|
|
return(1);
|
|
} else {
|
|
*cp = '\0';
|
|
fd = access(file, 2);
|
|
*cp = '/';
|
|
if (fd == 0)
|
|
return(1);
|
|
}
|
|
printf("%s: %s: is not removable by you\n", name, file);
|
|
}
|
|
return(0);
|
|
|
|
error1:
|
|
printf(" and is unprintable\n");
|
|
(void) close(fd);
|
|
return(-1);
|
|
}
|
|
|
|
/*
|
|
* itoa - integer to string conversion
|
|
*/
|
|
char *
|
|
itoa(i)
|
|
register int i;
|
|
{
|
|
static char b[10] = "########";
|
|
register char *p;
|
|
|
|
p = &b[8];
|
|
do
|
|
*p-- = i%10 + '0';
|
|
while (i /= 10);
|
|
return(++p);
|
|
}
|
|
|
|
/*
|
|
* Perform lookup for printer name or abbreviation --
|
|
*/
|
|
chkprinter(s)
|
|
char *s;
|
|
{
|
|
int status;
|
|
char buf[BUFSIZ];
|
|
static char pbuf[BUFSIZ/2];
|
|
char *bp = pbuf;
|
|
extern char *pgetstr();
|
|
|
|
if ((status = pgetent(buf, s)) < 0)
|
|
fatal("cannot open printer description file");
|
|
else if (status == 0)
|
|
fatal("%s: unknown printer", s);
|
|
if ((SD = pgetstr("sd", &bp)) == NULL)
|
|
SD = _PATH_DEFSPOOL;
|
|
if ((LO = pgetstr("lo", &bp)) == NULL)
|
|
LO = DEFLOCK;
|
|
RG = pgetstr("rg", &bp);
|
|
if ((MX = pgetnum("mx")) < 0)
|
|
MX = DEFMX;
|
|
if ((MC = pgetnum("mc")) < 0)
|
|
MC = DEFMAXCOPIES;
|
|
if ((DU = pgetnum("du")) < 0)
|
|
DU = DEFUID;
|
|
SC = pgetflag("sc");
|
|
}
|
|
|
|
/*
|
|
* Make the temp files.
|
|
*/
|
|
mktemps()
|
|
{
|
|
register int c, len, fd, n;
|
|
register char *cp;
|
|
char buf[BUFSIZ];
|
|
char *lmktemp();
|
|
|
|
(void) sprintf(buf, "%s/.seq", SD);
|
|
if ((fd = open(buf, O_RDWR|O_CREAT, 0661)) < 0) {
|
|
printf("%s: cannot create %s\n", name, buf);
|
|
exit(1);
|
|
}
|
|
if (flock(fd, LOCK_EX)) {
|
|
printf("%s: cannot lock %s\n", name, buf);
|
|
exit(1);
|
|
}
|
|
n = 0;
|
|
if ((len = read(fd, buf, sizeof(buf))) > 0) {
|
|
for (cp = buf; len--; ) {
|
|
if (*cp < '0' || *cp > '9')
|
|
break;
|
|
n = n * 10 + (*cp++ - '0');
|
|
}
|
|
}
|
|
len = strlen(SD) + strlen(host) + 8;
|
|
tfname = lmktemp("tf", n, len);
|
|
cfname = lmktemp("cf", n, len);
|
|
dfname = lmktemp("df", n, len);
|
|
inchar = strlen(SD) + 3;
|
|
n = (n + 1) % 1000;
|
|
(void) lseek(fd, 0L, 0);
|
|
sprintf(buf, "%03d\n", n);
|
|
(void) write(fd, buf, strlen(buf));
|
|
(void) close(fd); /* unlocks as well */
|
|
}
|
|
|
|
/*
|
|
* Make a temp file name.
|
|
*/
|
|
char *
|
|
lmktemp(id, num, len)
|
|
char *id;
|
|
int num, len;
|
|
{
|
|
register char *s;
|
|
extern char *malloc();
|
|
|
|
if ((s = malloc(len)) == NULL)
|
|
fatal("out of memory");
|
|
(void) sprintf(s, "%s/%sA%03d%s", SD, id, num, host);
|
|
return(s);
|
|
}
|
|
|
|
/*VARARGS1*/
|
|
fatal(msg, a1, a2, a3)
|
|
char *msg;
|
|
{
|
|
printf("%s: ", name);
|
|
printf(msg, a1, a2, a3);
|
|
putchar('\n');
|
|
exit(1);
|
|
}
|