2008-02-23 03:54:48 +05:30
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/* vi: set sw=4 ts=4: */
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/*
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2008-02-25 00:14:20 +05:30
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* bare bones version of lpr & lpq: BSD printing utilities
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2008-02-23 03:54:48 +05:30
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*
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2008-02-25 00:14:20 +05:30
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* Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
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*
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* Original idea and code:
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* Walter Harms <WHarms@bfs.de>
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*
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2010-08-16 23:44:46 +05:30
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* Licensed under GPLv2, see file LICENSE in this source tree.
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2008-02-25 00:14:20 +05:30
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*
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2008-02-25 03:38:57 +05:30
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* See RFC 1179 for protocol description.
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2008-02-23 03:54:48 +05:30
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*/
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2015-10-19 04:15:46 +05:30
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//config:config LPR
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2017-07-19 01:31:24 +05:30
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//config: bool "lpr (10 kb)"
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2015-10-19 04:15:46 +05:30
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//config: default y
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//config: help
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//config: lpr sends files (or standard input) to a print spooling daemon.
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//config:
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//config:config LPQ
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2017-07-19 01:31:24 +05:30
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//config: bool "lpq (10 kb)"
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2015-10-19 04:15:46 +05:30
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//config: default y
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//config: help
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//config: lpq is a print spool queue examination and manipulation program.
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2017-01-29 19:27:33 +05:30
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// APPLET_ODDNAME:name main location suid_type help
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2015-10-19 04:15:46 +05:30
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//applet:IF_LPQ(APPLET_ODDNAME(lpq, lpqr, BB_DIR_USR_BIN, BB_SUID_DROP, lpq))
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//applet:IF_LPR(APPLET_ODDNAME(lpr, lpqr, BB_DIR_USR_BIN, BB_SUID_DROP, lpr))
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//kbuild:lib-$(CONFIG_LPR) += lpr.o
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//kbuild:lib-$(CONFIG_LPQ) += lpr.o
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2011-04-11 06:59:49 +05:30
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//usage:#define lpr_trivial_usage
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//usage: "-P queue[@host[:port]] -U USERNAME -J TITLE -Vmh [FILE]..."
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/* -C CLASS exists too, not shown.
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* CLASS is supposed to be printed on banner page, if one is requested */
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//usage:#define lpr_full_usage "\n\n"
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2011-06-05 07:28:28 +05:30
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//usage: " -P lp service to connect to (else uses $PRINTER)"
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2011-04-11 06:59:49 +05:30
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//usage: "\n -m Send mail on completion"
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//usage: "\n -h Print banner page too"
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//usage: "\n -V Verbose"
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//usage:
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//usage:#define lpq_trivial_usage
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//usage: "[-P queue[@host[:port]]] [-U USERNAME] [-d JOBID]... [-fs]"
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//usage:#define lpq_full_usage "\n\n"
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2011-06-05 07:28:28 +05:30
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//usage: " -P lp service to connect to (else uses $PRINTER)"
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2011-04-11 06:59:49 +05:30
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//usage: "\n -d Delete jobs"
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//usage: "\n -f Force any waiting job to be printed"
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//usage: "\n -s Short display"
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2008-02-23 03:54:48 +05:30
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#include "libbb.h"
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2008-02-25 00:14:20 +05:30
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/*
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* LPD returns binary 0 on success.
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* Otherwise it returns error message.
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2008-02-23 03:54:48 +05:30
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*/
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2008-02-27 20:05:21 +05:30
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static void get_response_or_say_and_die(int fd, const char *errmsg)
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2008-02-23 03:54:48 +05:30
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{
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2008-02-26 02:00:24 +05:30
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ssize_t sz;
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char buf[128];
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2008-02-25 00:14:20 +05:30
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2008-02-26 02:00:24 +05:30
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buf[0] = ' ';
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2008-02-27 20:05:21 +05:30
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sz = safe_read(fd, buf, 1);
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2008-02-26 02:00:24 +05:30
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if ('\0' != buf[0]) {
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2008-02-25 00:14:20 +05:30
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// request has failed
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2008-02-26 02:00:24 +05:30
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// try to make sure last char is '\n', but do not add
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// superfluous one
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2008-02-27 20:05:21 +05:30
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sz = full_read(fd, buf + 1, 126);
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2008-02-26 02:00:24 +05:30
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bb_error_msg("error while %s%s", errmsg,
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(sz > 0 ? ". Server said:" : ""));
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if (sz > 0) {
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// sz = (bytes in buf) - 1
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if (buf[sz] != '\n')
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buf[++sz] = '\n';
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safe_write(STDERR_FILENO, buf, sz + 1);
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}
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2008-02-23 03:54:48 +05:30
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xfunc_die();
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}
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}
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2008-02-25 00:14:20 +05:30
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int lpqr_main(int argc, char *argv[]) MAIN_EXTERNALLY_VISIBLE;
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2008-07-05 14:48:54 +05:30
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int lpqr_main(int argc UNUSED_PARAM, char *argv[])
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2008-02-23 03:54:48 +05:30
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{
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enum {
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2008-02-25 00:14:20 +05:30
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OPT_P = 1 << 0, // -P queue[@host[:port]]. If no -P is given use $PRINTER, then "lp@localhost:515"
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OPT_U = 1 << 1, // -U username
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LPR_V = 1 << 2, // -V: be verbose
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2008-03-24 07:35:58 +05:30
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LPR_h = 1 << 3, // -h: want banner printed
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2008-02-25 00:14:20 +05:30
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LPR_C = 1 << 4, // -C class: job "class" (? supposedly printed on banner)
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LPR_J = 1 << 5, // -J title: the job title for the banner page
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LPR_m = 1 << 6, // -m: send mail back to user
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LPQ_SHORT_FMT = 1 << 2, // -s: short listing format
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LPQ_DELETE = 1 << 3, // -d: delete job(s)
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LPQ_FORCE = 1 << 4, // -f: force waiting job(s) to be printed
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2008-02-23 03:54:48 +05:30
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};
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2008-02-25 00:14:20 +05:30
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char tempfile[sizeof("/tmp/lprXXXXXX")];
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const char *job_title;
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const char *printer_class = ""; // printer class, max 32 char
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const char *queue; // name of printer queue
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const char *server = "localhost"; // server[:port] of printer queue
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char *hostname;
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// N.B. IMHO getenv("USER") can be way easily spoofed!
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2008-12-03 04:26:59 +05:30
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const char *user = xuid2uname(getuid());
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2008-02-25 00:14:20 +05:30
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unsigned job;
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unsigned opts;
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2008-02-27 20:05:21 +05:30
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int fd;
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2008-02-25 00:14:20 +05:30
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2012-06-10 17:17:17 +05:30
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queue = getenv("PRINTER");
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if (!queue)
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queue = "lp";
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2008-02-25 00:14:20 +05:30
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// parse options
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// TODO: set opt_complementary: s,d,f are mutually exclusive
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opts = getopt32(argv,
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(/*lp*/'r' == applet_name[2]) ? "P:U:VhC:J:m" : "P:U:sdf"
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, &queue, &user
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, &printer_class, &job_title
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);
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2008-02-23 03:54:48 +05:30
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argv += optind;
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2008-02-25 00:14:20 +05:30
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2012-06-10 17:17:17 +05:30
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{
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2008-02-25 00:14:20 +05:30
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// queue name is to the left of '@'
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char *s = strchr(queue, '@');
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if (s) {
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// server name is to the right of '@'
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*s = '\0';
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server = s + 1;
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}
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2008-02-23 03:54:48 +05:30
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}
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2008-02-25 00:14:20 +05:30
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// do connect
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fd = create_and_connect_stream_or_die(server, 515);
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//
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// LPQ ------------------------
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//
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if (/*lp*/'q' == applet_name[2]) {
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char cmd;
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// force printing of every job still in queue
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if (opts & LPQ_FORCE) {
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cmd = 1;
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goto command;
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// delete job(s)
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} else if (opts & LPQ_DELETE) {
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2008-02-27 20:05:21 +05:30
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fdprintf(fd, "\x5" "%s %s", queue, user);
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2008-02-25 00:14:20 +05:30
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while (*argv) {
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2008-02-27 20:05:21 +05:30
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fdprintf(fd, " %s", *argv++);
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2008-02-25 00:14:20 +05:30
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}
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bb_putchar('\n');
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// dump current jobs status
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// N.B. periodical polling should be achieved
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// via "watch -n delay lpq"
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// They say it's the UNIX-way :)
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} else {
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cmd = (opts & LPQ_SHORT_FMT) ? 3 : 4;
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command:
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2008-02-27 20:05:21 +05:30
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fdprintf(fd, "%c" "%s\n", cmd, queue);
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bb_copyfd_eof(fd, STDOUT_FILENO);
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2008-02-25 00:14:20 +05:30
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}
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2008-02-23 03:54:48 +05:30
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2008-02-25 00:14:20 +05:30
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return EXIT_SUCCESS;
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}
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2008-02-23 03:54:48 +05:30
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2008-02-25 00:14:20 +05:30
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//
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// LPR ------------------------
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//
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if (opts & LPR_V)
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bb_error_msg("connected to server");
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2008-02-23 03:54:48 +05:30
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2008-02-25 00:14:20 +05:30
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job = getpid() % 1000;
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2008-02-27 20:05:21 +05:30
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hostname = safe_gethostname();
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2008-02-23 03:54:48 +05:30
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2008-02-25 00:14:20 +05:30
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// no files given on command line? -> use stdin
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if (!*argv)
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*--argv = (char *)"-";
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2008-02-27 20:05:21 +05:30
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fdprintf(fd, "\x2" "%s\n", queue);
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get_response_or_say_and_die(fd, "setting queue");
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2008-02-25 00:14:20 +05:30
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// process files
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do {
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2008-07-23 00:45:30 +05:30
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unsigned cflen;
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2008-02-27 20:05:21 +05:30
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int dfd;
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2008-02-25 00:14:20 +05:30
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struct stat st;
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char *c;
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char *remote_filename;
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char *controlfile;
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// if data file is stdin, we need to dump it first
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if (LONE_DASH(*argv)) {
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strcpy(tempfile, "/tmp/lprXXXXXX");
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2010-10-22 16:57:16 +05:30
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dfd = xmkstemp(tempfile);
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2008-02-27 20:05:21 +05:30
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bb_copyfd_eof(STDIN_FILENO, dfd);
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xlseek(dfd, 0, SEEK_SET);
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2008-02-25 00:14:20 +05:30
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*argv = (char*)bb_msg_standard_input;
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} else {
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2008-02-27 20:05:21 +05:30
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dfd = xopen(*argv, O_RDONLY);
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2008-02-23 03:54:48 +05:30
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}
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2008-02-25 00:14:20 +05:30
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2012-06-10 17:17:17 +05:30
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st.st_size = 0; /* paranoia: fstat may theoretically fail */
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fstat(dfd, &st);
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/* Apparently, some servers are buggy and won't accept 0-sized jobs.
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* Standard lpr works around it by refusing to send such jobs:
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*/
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if (st.st_size == 0) {
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bb_error_msg("nothing to print");
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continue;
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}
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2008-02-25 00:14:20 +05:30
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/* "The name ... should start with ASCII "cfA",
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* followed by a three digit job number, followed
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* by the host name which has constructed the file."
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* We supply 'c' or 'd' as needed for control/data file. */
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remote_filename = xasprintf("fA%03u%s", job, hostname);
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// create control file
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// TODO: all lines but 2 last are constants! How we can use this fact?
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controlfile = xasprintf(
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"H" "%.32s\n" "P" "%.32s\n" /* H HOST, P USER */
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"C" "%.32s\n" /* C CLASS - printed on banner page (if L cmd is also given) */
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"J" "%.99s\n" /* J JOBNAME */
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/* "class name for banner page and job name
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* for banner page commands must precede L command" */
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"L" "%.32s\n" /* L USER - print banner page, with given user's name */
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"M" "%.32s\n" /* M WHOM_TO_MAIL */
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"l" "d%.31s\n" /* l DATA_FILE_NAME ("dfAxxx") */
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, hostname, user
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, printer_class /* can be "" */
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, ((opts & LPR_J) ? job_title : *argv)
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, (opts & LPR_h) ? user : ""
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, (opts & LPR_m) ? user : ""
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, remote_filename
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);
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2012-06-10 17:17:17 +05:30
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// delete possible "\nX\n" (that is, one-char) patterns
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2008-02-25 05:02:36 +05:30
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c = controlfile;
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while ((c = strchr(c, '\n')) != NULL) {
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2008-07-23 00:45:30 +05:30
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if (c[1] && c[2] == '\n') {
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2012-04-27 18:33:34 +05:30
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overlapping_strcpy(c, c+2);
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2008-07-23 00:45:30 +05:30
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} else {
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c++;
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}
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2008-02-25 05:02:36 +05:30
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}
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2008-02-25 00:14:20 +05:30
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// send control file
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if (opts & LPR_V)
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bb_error_msg("sending control file");
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2008-07-23 00:45:30 +05:30
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/* "Acknowledgement processing must occur as usual
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* after the command is sent." */
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2012-04-27 18:33:34 +05:30
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cflen = (unsigned)strlen(controlfile);
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2008-07-23 00:45:30 +05:30
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fdprintf(fd, "\x2" "%u c%s\n", cflen, remote_filename);
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get_response_or_say_and_die(fd, "sending control file");
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2008-02-23 03:54:48 +05:30
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|
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/* "Once all of the contents have
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* been delivered, an octet of zero bits is sent as
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* an indication that the file being sent is complete.
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* A second level of acknowledgement processing
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* must occur at this point." */
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2008-07-23 00:45:30 +05:30
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full_write(fd, controlfile, cflen + 1); /* writes NUL byte too */
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2008-02-27 20:05:21 +05:30
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get_response_or_say_and_die(fd, "sending control file");
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2008-02-25 00:14:20 +05:30
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// send data file, with name "dfaXXX"
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if (opts & LPR_V)
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bb_error_msg("sending data file");
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2008-02-27 20:05:21 +05:30
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fdprintf(fd, "\x3" "%"OFF_FMT"u d%s\n", st.st_size, remote_filename);
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2008-07-23 00:45:30 +05:30
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get_response_or_say_and_die(fd, "sending data file");
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2008-02-27 20:05:21 +05:30
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if (bb_copyfd_size(dfd, fd, st.st_size) != st.st_size) {
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2008-02-25 00:14:20 +05:30
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// We're screwed. We sent less bytes than we advertised.
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bb_error_msg_and_die("local file changed size?!");
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}
|
2008-02-27 20:05:21 +05:30
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|
write(fd, "", 1); // send ACK
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get_response_or_say_and_die(fd, "sending data file");
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2008-02-23 03:54:48 +05:30
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2008-02-25 00:14:20 +05:30
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// delete temporary file if we dumped stdin
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if (*argv == (char*)bb_msg_standard_input)
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unlink(tempfile);
|
2008-02-23 03:54:48 +05:30
|
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|
|
2008-02-25 00:14:20 +05:30
|
|
|
// cleanup
|
|
|
|
close(fd);
|
|
|
|
free(remote_filename);
|
|
|
|
free(controlfile);
|
2008-02-23 03:54:48 +05:30
|
|
|
|
2008-02-27 20:05:21 +05:30
|
|
|
// say job accepted
|
|
|
|
if (opts & LPR_V)
|
|
|
|
bb_error_msg("job accepted");
|
|
|
|
|
2008-02-25 00:14:20 +05:30
|
|
|
// next, please!
|
|
|
|
job = (job + 1) % 1000;
|
|
|
|
} while (*++argv);
|
2008-02-23 03:54:48 +05:30
|
|
|
|
2008-02-25 00:14:20 +05:30
|
|
|
return EXIT_SUCCESS;
|
2008-02-23 03:54:48 +05:30
|
|
|
}
|