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/* $OpenBSD: lpr.c,v 1.48 2015/02/09 23:00:14 deraadt Exp $ */ |
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/* $NetBSD: lpr.c,v 1.19 2000/10/11 20:23:52 is Exp $ */ |
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/* |
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* Copyright (c) 1983, 1989, 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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* |
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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. 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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/* |
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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 <sys/stat.h> |
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#include <sys/file.h> |
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#include <dirent.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <signal.h> |
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#include <syslog.h> |
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#include <pwd.h> |
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#include <grp.h> |
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#include <unistd.h> |
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#include <limits.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <ctype.h> |
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#include <string.h> |
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#include <err.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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static char *cfname; /* daemon control files, linked from tf's */ |
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static char *class = host; /* class title on header page */ |
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static char *dfname; /* data files */ |
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static char *fonts[4]; /* troff font names */ |
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static char format = 'f'; /* format char for printing files */ |
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static int hdr = 1; /* print header or not (default is yes) */ |
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static int iflag; /* indentation wanted */ |
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static int inchar; /* location to increment char in file names */ |
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static int indent; /* amount to indent */ |
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static char *jobname; /* job name on header page */ |
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static int mailflg; /* send mail */ |
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static int nact; /* number of jobs to act on */ |
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static int ncopies = 1; /* # of copies to make */ |
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static const char *person; /* user name */ |
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static int qflag; /* q job, but don't exec daemon */ |
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static int rflag; /* remove files upon completion */ |
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static int sflag; /* symbolic link flag */ |
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static int tfd; /* control file descriptor */ |
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static char *tfname; /* tmp copy of cf before linking */ |
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static char *title; /* pr'ing title */ |
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static char *width; /* width for versatec printing */ |
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static struct stat statb; |
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volatile sig_atomic_t gotintr; |
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static void card(int, const char *); |
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static void chkprinter(char *); |
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static void cleanup(int); |
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static void copy(int, char *); |
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static char *itoa(int); |
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static char *linked(char *); |
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static char *lmktemp(char *, int); |
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static void mktemps(void); |
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static int nfile(char *); |
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static int test(char *); |
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static __dead void usage(void); |
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int |
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main(int argc, char **argv) |
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{ |
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struct passwd *pw; |
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struct group *gptr; |
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char *arg, *cp; |
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char buf[PATH_MAX]; |
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int i, f, ch; |
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struct stat stb; |
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/* |
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* Simulate setuid daemon w/ PRIV_END called. |
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* We don't want lpr to actually be setuid daemon since that |
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* requires that the lpr binary be owned by user daemon, which |
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* is potentially unsafe. |
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*/ |
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if ((pw = getpwuid(DEFUID)) == NULL) |
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errx(1, "daemon uid (%u) not in password file", DEFUID); |
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effective_uid = pw->pw_uid; |
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real_uid = getuid(); |
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effective_gid = pw->pw_gid; |
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real_gid = getgid(); |
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setresgid(real_gid, real_gid, effective_gid); |
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setresuid(real_uid, real_uid, effective_uid); |
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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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gethostname(host, sizeof (host)); |
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openlog("lpr", 0, LOG_LPR); |
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while ((ch = getopt(argc, argv, |
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":#:1:2:3:4:C:J:P:T:U:cdfghi:lmnpqrstvw:")) != -1) { |
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switch (ch) { |
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case '#': /* n copies */ |
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if (isdigit((unsigned char)*optarg)) { |
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i = atoi(optarg); |
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if (i > 0) |
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ncopies = i; |
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} |
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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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fonts[ch - '1'] = optarg; |
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break; |
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case 'C': /* classification spec */ |
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hdr++; |
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class = optarg; |
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break; |
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case 'J': /* job name */ |
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hdr++; |
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jobname = optarg; |
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break; |
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case 'P': /* specifiy printer name */ |
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printer = optarg; |
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break; |
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case 'T': /* pr's title line */ |
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title = optarg; |
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break; |
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case 'U': /* user name */ |
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hdr++; |
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person = optarg; |
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break; |
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case 'c': /* print cifplot 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 'l': /* literal output */ |
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case 'n': /* print ditroff 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 'v': /* print vplot output */ |
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format = ch; |
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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 'h': /* toggle want of header page */ |
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hdr = !hdr; |
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break; |
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case 'i': /* indent output */ |
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iflag++; |
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indent = atoi(optarg); |
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if (indent < 0) |
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indent = 8; |
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break; |
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case 'm': /* send mail when done */ |
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mailflg = 1; |
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break; |
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case 'q': /* just q job */ |
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qflag = 1; |
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break; |
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case 'r': /* remove file when done */ |
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rflag = 1; |
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break; |
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case 's': /* try to link files */ |
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sflag = 1; |
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break; |
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case 'w': /* versatec page width */ |
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width = optarg; |
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break; |
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case ':': /* catch "missing argument" error */ |
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if (optopt == 'i') { |
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iflag++; /* -i without args is valid */ |
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indent = 8; |
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} else |
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usage(); |
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break; |
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default: |
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usage(); |
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} |
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} |
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argc -= optind; |
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argv += optind; |
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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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errx(1, "multiple copies are not allowed"); |
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if (MC > 0 && ncopies > MC) |
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errx(1, "only %ld 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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if (real_uid != DU || person == NULL) { |
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if ((pw = getpwuid(real_uid)) == NULL) |
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errx(1, "Who are you?"); |
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if ((person = strdup(pw->pw_name)) == NULL) |
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err(1, NULL); |
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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 && real_uid != DU) { |
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if ((gptr = getgrnam(RG)) == NULL) |
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errx(1, "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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errx(1, "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 real_uid is not root. |
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*/ |
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(void)snprintf(buf, sizeof(buf), "%s/%s", SD, LO); |
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if (real_uid && stat(buf, &stb) == 0 && (stb.st_mode & 010)) |
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errx(1, "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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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 == 0) |
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jobname = "stdin"; |
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else |
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jobname = (arg = strrchr(argv[0], '/')) ? |
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arg + 1 : argv[0]; |
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} |
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card('J', jobname); |
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card('C', class); |
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if (!SH) |
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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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315 |
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/* |
316 |
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* Read the files and spool them. |
317 |
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*/ |
318 |
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if (argc == 0) |
319 |
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copy(0, " "); |
320 |
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else while (argc--) { |
321 |
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if (argv[0][0] == '-' && argv[0][1] == '\0') { |
322 |
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/* use stdin */ |
323 |
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copy(0, " "); |
324 |
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argv++; |
325 |
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continue; |
326 |
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} |
327 |
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if ((f = test(arg = *argv++)) < 0) |
328 |
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continue; /* file unreasonable */ |
329 |
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330 |
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if (sflag && (cp = linked(arg)) != NULL) { |
331 |
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(void)snprintf(buf, sizeof(buf), "%d %llu", |
332 |
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statb.st_dev, (unsigned long long)statb.st_ino); |
333 |
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card('S', buf); |
334 |
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if (format == 'p') |
335 |
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card('T', title ? title : arg); |
336 |
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for (i = 0; i < ncopies; i++) |
337 |
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card(format, &dfname[inchar-2]); |
338 |
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card('U', &dfname[inchar-2]); |
339 |
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if (f) |
340 |
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card('U', cp); |
341 |
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card('N', arg); |
342 |
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dfname[inchar]++; |
343 |
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nact++; |
344 |
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continue; |
345 |
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} |
346 |
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if (sflag) |
347 |
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warnx("%s: not linked, copying instead", arg); |
348 |
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if ((i = safe_open(arg, O_RDONLY, 0)) < 0) |
349 |
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warn("%s", arg); |
350 |
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else { |
351 |
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copy(i, arg); |
352 |
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(void)close(i); |
353 |
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if (f && unlink(arg) < 0) |
354 |
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warnx("%s: not removed", arg); |
355 |
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} |
356 |
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} |
357 |
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358 |
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if (nact) { |
359 |
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(void)close(tfd); |
360 |
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tfname[inchar]--; |
361 |
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/* |
362 |
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* Touch the control file to fix position in the queue. |
363 |
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*/ |
364 |
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PRIV_START; |
365 |
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if ((tfd = safe_open(tfname, O_RDWR|O_NOFOLLOW, 0)) >= 0) { |
366 |
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char c; |
367 |
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368 |
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if (read(tfd, &c, 1) == 1 && |
369 |
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lseek(tfd, (off_t)0, SEEK_SET) == 0 && |
370 |
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write(tfd, &c, 1) != 1) { |
371 |
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warn("%s", tfname); |
372 |
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tfname[inchar]++; |
373 |
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cleanup(0); |
374 |
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} |
375 |
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(void)close(tfd); |
376 |
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} |
377 |
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if (link(tfname, cfname) < 0) { |
378 |
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warn("cannot rename %s", cfname); |
379 |
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tfname[inchar]++; |
380 |
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cleanup(0); |
381 |
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} |
382 |
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unlink(tfname); |
383 |
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PRIV_END; |
384 |
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if (qflag) /* just q things up */ |
385 |
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exit(0); |
386 |
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if (!startdaemon(printer)) |
387 |
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printf("jobs queued, but cannot start daemon.\n"); |
388 |
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exit(0); |
389 |
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} |
390 |
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cleanup(0); |
391 |
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return (1); |
392 |
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/* NOTREACHED */ |
393 |
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} |
394 |
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395 |
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/* |
396 |
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* Create the file n and copy from file descriptor f. |
397 |
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*/ |
398 |
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static void |
399 |
|
|
copy(int f, char *n) |
400 |
|
|
{ |
401 |
|
|
int fd, i, nr, nc; |
402 |
|
|
char buf[BUFSIZ]; |
403 |
|
|
|
404 |
|
|
if (format == 'p') |
405 |
|
|
card('T', title ? title : n); |
406 |
|
|
for (i = 0; i < ncopies; i++) |
407 |
|
|
card(format, &dfname[inchar-2]); |
408 |
|
|
card('U', &dfname[inchar-2]); |
409 |
|
|
card('N', n); |
410 |
|
|
fd = nfile(dfname); |
411 |
|
|
nr = nc = 0; |
412 |
|
|
while ((i = read(f, buf, sizeof(buf))) > 0) { |
413 |
|
|
if (write(fd, buf, i) != i) { |
414 |
|
|
warn("%s", n); |
415 |
|
|
break; |
416 |
|
|
} |
417 |
|
|
nc += i; |
418 |
|
|
if (nc >= sizeof(buf)) { |
419 |
|
|
nc -= sizeof(buf); |
420 |
|
|
nr++; |
421 |
|
|
if (MX > 0 && nr > MX) { |
422 |
|
|
warnx("%s: copy file is too large", n); |
423 |
|
|
break; |
424 |
|
|
} |
425 |
|
|
} |
426 |
|
|
} |
427 |
|
|
(void)close(fd); |
428 |
|
|
if (nc == 0 && nr == 0) |
429 |
|
|
warnx("%s: empty input file", f ? n : "stdin"); |
430 |
|
|
else |
431 |
|
|
nact++; |
432 |
|
|
} |
433 |
|
|
|
434 |
|
|
/* |
435 |
|
|
* Try and link the file to dfname. Return a pointer to the full |
436 |
|
|
* path name if successful. |
437 |
|
|
*/ |
438 |
|
|
static char * |
439 |
|
|
linked(char *file) |
440 |
|
|
{ |
441 |
|
|
char *cp; |
442 |
|
|
static char buf[PATH_MAX]; |
443 |
|
|
int ret; |
444 |
|
|
|
445 |
|
|
if (*file != '/') { |
446 |
|
|
if (getcwd(buf, sizeof(buf)) == NULL) |
447 |
|
|
return(NULL); |
448 |
|
|
|
449 |
|
|
while (file[0] == '.') { |
450 |
|
|
switch (file[1]) { |
451 |
|
|
case '/': |
452 |
|
|
file += 2; |
453 |
|
|
continue; |
454 |
|
|
case '.': |
455 |
|
|
if (file[2] == '/') { |
456 |
|
|
if ((cp = strrchr(buf, '/')) != NULL) |
457 |
|
|
*cp = '\0'; |
458 |
|
|
file += 3; |
459 |
|
|
continue; |
460 |
|
|
} |
461 |
|
|
} |
462 |
|
|
break; |
463 |
|
|
} |
464 |
|
|
if (strlcat(buf, "/", sizeof(buf)) >= sizeof(buf) || |
465 |
|
|
strlcat(buf, file, sizeof(buf)) >= sizeof(buf)) |
466 |
|
|
return(NULL); |
467 |
|
|
file = buf; |
468 |
|
|
} |
469 |
|
|
PRIV_START; |
470 |
|
|
ret = symlink(file, dfname); |
471 |
|
|
PRIV_END; |
472 |
|
|
return(ret ? NULL : file); |
473 |
|
|
} |
474 |
|
|
|
475 |
|
|
/* |
476 |
|
|
* Put a line into the control file. |
477 |
|
|
*/ |
478 |
|
|
static void |
479 |
|
|
card(int c, const char *p2) |
480 |
|
|
{ |
481 |
|
|
char buf[BUFSIZ]; |
482 |
|
|
char *p1 = buf; |
483 |
|
|
int len = 2; |
484 |
|
|
|
485 |
|
|
if (strlen(p2) > sizeof(buf) - 2) |
486 |
|
|
errx(1, "Internal error: String longer than %ld", |
487 |
|
|
(long)sizeof(buf)); |
488 |
|
|
|
489 |
|
|
*p1++ = c; |
490 |
|
|
while ((c = *p2++) != '\0' && len < sizeof(buf)) { |
491 |
|
|
*p1++ = (c == '\n') ? ' ' : c; |
492 |
|
|
len++; |
493 |
|
|
} |
494 |
|
|
*p1++ = '\n'; |
495 |
|
|
write(tfd, buf, len); |
496 |
|
|
} |
497 |
|
|
|
498 |
|
|
/* |
499 |
|
|
* Create a new file in the spool directory. |
500 |
|
|
*/ |
501 |
|
|
static int |
502 |
|
|
nfile(char *n) |
503 |
|
|
{ |
504 |
|
|
int f; |
505 |
|
|
int oldumask = umask(0); /* should block signals */ |
506 |
|
|
|
507 |
|
|
PRIV_START; |
508 |
|
|
f = open(n, O_WRONLY|O_EXCL|O_CREAT, FILMOD); |
509 |
|
|
(void)umask(oldumask); |
510 |
|
|
if (f < 0) { |
511 |
|
|
warn("%s", n); |
512 |
|
|
cleanup(0); |
513 |
|
|
} |
514 |
|
|
PRIV_END; |
515 |
|
|
if (++n[inchar] > 'z') { |
516 |
|
|
if (++n[inchar-2] == 't') { |
517 |
|
|
warnx("too many files - break up the job"); |
518 |
|
|
cleanup(0); |
519 |
|
|
} |
520 |
|
|
n[inchar] = 'A'; |
521 |
|
|
} else if (n[inchar] == '[') |
522 |
|
|
n[inchar] = 'a'; |
523 |
|
|
return (f); |
524 |
|
|
} |
525 |
|
|
|
526 |
|
|
/* |
527 |
|
|
* Cleanup after interrupts and errors. |
528 |
|
|
*/ |
529 |
|
|
static void |
530 |
|
|
cleanup(int signo) |
531 |
|
|
{ |
532 |
|
|
int i; |
533 |
|
|
|
534 |
|
|
signal(SIGHUP, SIG_IGN); |
535 |
|
|
signal(SIGINT, SIG_IGN); |
536 |
|
|
signal(SIGQUIT, SIG_IGN); |
537 |
|
|
signal(SIGTERM, SIG_IGN); |
538 |
|
|
i = inchar; |
539 |
|
|
PRIV_START; |
540 |
|
|
if (tfname) |
541 |
|
|
do |
542 |
|
|
unlink(tfname); |
543 |
|
|
while (tfname[i]-- != 'A'); |
544 |
|
|
if (cfname) |
545 |
|
|
do |
546 |
|
|
unlink(cfname); |
547 |
|
|
while (cfname[i]-- != 'A'); |
548 |
|
|
if (dfname) |
549 |
|
|
do { |
550 |
|
|
do |
551 |
|
|
unlink(dfname); |
552 |
|
|
while (dfname[i]-- != 'A'); |
553 |
|
|
dfname[i] = 'z'; |
554 |
|
|
} while (dfname[i-2]-- != 'd'); |
555 |
|
|
_exit(1); |
556 |
|
|
} |
557 |
|
|
|
558 |
|
|
/* |
559 |
|
|
* Test to see if this is a printable file. |
560 |
|
|
* Return -1 if it is not, 0 if its printable, and 1 if |
561 |
|
|
* we should remove it after printing. |
562 |
|
|
*/ |
563 |
|
|
static int |
564 |
|
|
test(char *file) |
565 |
|
|
{ |
566 |
|
|
int fd; |
567 |
|
|
char *cp; |
568 |
|
|
|
569 |
|
|
if ((fd = open(file, O_RDONLY|O_NONBLOCK)) < 0) { |
570 |
|
|
warn("cannot open %s", file); |
571 |
|
|
goto bad; |
572 |
|
|
} |
573 |
|
|
if (fstat(fd, &statb) < 0) { |
574 |
|
|
warn("cannot stat %s", file); |
575 |
|
|
goto bad; |
576 |
|
|
} |
577 |
|
|
if (S_ISDIR(statb.st_mode)) { |
578 |
|
|
warnx("%s is a directory", file); |
579 |
|
|
goto bad; |
580 |
|
|
} |
581 |
|
|
if (!S_ISREG(statb.st_mode)) { |
582 |
|
|
warnx("%s is not a regular file", file); |
583 |
|
|
goto bad; |
584 |
|
|
} |
585 |
|
|
if (statb.st_size == 0) { |
586 |
|
|
warnx("%s is an empty file", file); |
587 |
|
|
goto bad; |
588 |
|
|
} |
589 |
|
|
(void)close(fd); |
590 |
|
|
if (rflag) { |
591 |
|
|
if ((cp = strrchr(file, '/')) == NULL) { |
592 |
|
|
if (access(".", 2) == 0) |
593 |
|
|
return(1); |
594 |
|
|
} else { |
595 |
|
|
if (cp == file) { |
596 |
|
|
fd = access("/", 2); |
597 |
|
|
} else { |
598 |
|
|
*cp = '\0'; |
599 |
|
|
fd = access(file, 2); |
600 |
|
|
*cp = '/'; |
601 |
|
|
} |
602 |
|
|
if (fd == 0) |
603 |
|
|
return(1); |
604 |
|
|
} |
605 |
|
|
warnx("%s is not removable by you", file); |
606 |
|
|
} |
607 |
|
|
return(0); |
608 |
|
|
bad: |
609 |
|
|
return(-1); |
610 |
|
|
} |
611 |
|
|
|
612 |
|
|
/* |
613 |
|
|
* itoa - integer to string conversion |
614 |
|
|
*/ |
615 |
|
|
static char * |
616 |
|
|
itoa(int i) |
617 |
|
|
{ |
618 |
|
|
static char b[10] = "########"; |
619 |
|
|
char *p; |
620 |
|
|
|
621 |
|
|
p = &b[8]; |
622 |
|
|
do |
623 |
|
|
*p-- = i%10 + '0'; |
624 |
|
|
while (i /= 10) |
625 |
|
|
; |
626 |
|
|
return(++p); |
627 |
|
|
} |
628 |
|
|
|
629 |
|
|
/* |
630 |
|
|
* Perform lookup for printer name or abbreviation -- |
631 |
|
|
*/ |
632 |
|
|
static void |
633 |
|
|
chkprinter(char *s) |
634 |
|
|
{ |
635 |
|
|
int status; |
636 |
|
|
|
637 |
|
|
if ((status = cgetent(&bp, printcapdb, s)) == -2) |
638 |
|
|
errx(1, "cannot open printer description file"); |
639 |
|
|
else if (status == -1) |
640 |
|
|
errx(1, "%s: unknown printer", s); |
641 |
|
|
if (cgetstr(bp, "sd", &SD) == -1) |
642 |
|
|
SD = _PATH_DEFSPOOL; |
643 |
|
|
if (cgetstr(bp, "lo", &LO) == -1) |
644 |
|
|
LO = DEFLOCK; |
645 |
|
|
cgetstr(bp, "rg", &RG); |
646 |
|
|
if (cgetnum(bp, "mx", &MX) < 0) |
647 |
|
|
MX = DEFMX; |
648 |
|
|
if (cgetnum(bp, "mc", &MC) < 0) |
649 |
|
|
MC = DEFMAXCOPIES; |
650 |
|
|
if (cgetnum(bp, "du", &DU) < 0) |
651 |
|
|
DU = DEFUID; |
652 |
|
|
SC = (cgetcap(bp, "sc", ':') != NULL); |
653 |
|
|
SH = (cgetcap(bp, "sh", ':') != NULL); |
654 |
|
|
} |
655 |
|
|
|
656 |
|
|
/* |
657 |
|
|
* Make the temp files. |
658 |
|
|
*/ |
659 |
|
|
static void |
660 |
|
|
mktemps(void) |
661 |
|
|
{ |
662 |
|
|
int len, fd, n; |
663 |
|
|
char *cp; |
664 |
|
|
char buf[BUFSIZ]; |
665 |
|
|
struct stat stb; |
666 |
|
|
|
667 |
|
|
if (snprintf(buf, sizeof(buf), "%s/.seq", SD) >= sizeof(buf)) |
668 |
|
|
errc(1, ENAMETOOLONG, "%s/.seq", SD); |
669 |
|
|
PRIV_START; |
670 |
|
|
if ((fd = safe_open(buf, O_RDWR|O_CREAT|O_NOFOLLOW, 0661)) < 0) |
671 |
|
|
err(1, "cannot open %s", buf); |
672 |
|
|
if (flock(fd, LOCK_EX)) |
673 |
|
|
err(1, "cannot lock %s", buf); |
674 |
|
|
PRIV_END; |
675 |
|
|
n = 0; |
676 |
|
|
if ((len = read(fd, buf, sizeof(buf))) > 0) { |
677 |
|
|
for (cp = buf; len--; ) { |
678 |
|
|
if (*cp < '0' || *cp > '9') |
679 |
|
|
break; |
680 |
|
|
n = n * 10 + (*cp++ - '0'); |
681 |
|
|
} |
682 |
|
|
} |
683 |
|
|
do { |
684 |
|
|
tfname = lmktemp("tf", n); |
685 |
|
|
cfname = lmktemp("cf", n); |
686 |
|
|
dfname = lmktemp("df", n); |
687 |
|
|
n = (n + 1) % 1000; |
688 |
|
|
} while (stat(tfname, &stb) == 0 || stat(cfname, &stb) == 0 || |
689 |
|
|
stat(dfname, &stb) == 0); |
690 |
|
|
inchar = strlen(SD) + 3; |
691 |
|
|
(void)lseek(fd, (off_t)0, SEEK_SET); |
692 |
|
|
snprintf(buf, sizeof(buf), "%03d\n", n); |
693 |
|
|
(void)write(fd, buf, strlen(buf)); |
694 |
|
|
(void)close(fd); /* unlocks as well */ |
695 |
|
|
} |
696 |
|
|
|
697 |
|
|
/* |
698 |
|
|
* Make a temp file name. |
699 |
|
|
*/ |
700 |
|
|
static char * |
701 |
|
|
lmktemp(char *id, int num) |
702 |
|
|
{ |
703 |
|
|
char *s; |
704 |
|
|
|
705 |
|
|
if (asprintf(&s, "%s/%sA%03d%s", SD, id, num, host) == -1) |
706 |
|
|
err(1, NULL); |
707 |
|
|
|
708 |
|
|
return(s); |
709 |
|
|
} |
710 |
|
|
|
711 |
|
|
static __dead void |
712 |
|
|
usage(void) |
713 |
|
|
{ |
714 |
|
|
extern char *__progname; |
715 |
|
|
|
716 |
|
|
fprintf(stderr, |
717 |
|
|
"usage: %s [-cdfghlmnpqrstv] [-#num] [-1234 font] " |
718 |
|
|
"[-C class] [-i [numcols]]\n" |
719 |
|
|
"\t[-J job] [-Pprinter] [-T title] [-U user] " |
720 |
|
|
"[-wnum] [name ...]\n", __progname); |
721 |
|
|
exit(1); |
722 |
|
|
} |