lpr,lpq: rework by dronnikov AT gmail.com
This commit is contained in:
Denis Vlasenko
parent
52feee9b1f
commit
4f82bdb050
@ -227,8 +227,8 @@ USE_LOGIN(APPLET(login, _BB_DIR_BIN, _BB_SUID_ALWAYS))
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USE_LOGNAME(APPLET_NOFORK(logname, logname, _BB_DIR_USR_BIN, _BB_SUID_NEVER, logname))
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USE_LOGREAD(APPLET(logread, _BB_DIR_SBIN, _BB_SUID_NEVER))
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USE_LOSETUP(APPLET(losetup, _BB_DIR_SBIN, _BB_SUID_NEVER))
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USE_LPQ(APPLET(lpq, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
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USE_LPR(APPLET(lpr, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
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USE_LPQ(APPLET_ODDNAME(lpq, lpqr, _BB_DIR_USR_BIN, _BB_SUID_NEVER, lpq))
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USE_LPR(APPLET_ODDNAME(lpr, lpqr, _BB_DIR_USR_BIN, _BB_SUID_NEVER, lpr))
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USE_LS(APPLET_NOEXEC(ls, ls, _BB_DIR_BIN, _BB_SUID_NEVER, ls))
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USE_LSATTR(APPLET(lsattr, _BB_DIR_BIN, _BB_SUID_NEVER))
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USE_LSMOD(APPLET(lsmod, _BB_DIR_SBIN, _BB_SUID_NEVER))
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@ -2052,22 +2052,23 @@ USE_FEATURE_BRCTL_FANCY("\n" \
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"losetup -f will show the first loop free loop device\n\n"
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#define lpq_trivial_usage \
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"[-P lp[@host[:port]]] [-t DELAY] [-d JOBID] [-fs]"
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"[-P queue[@host[:port]]] [-U USERNAME] [-d JOBID...] [-fs]"
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#define lpq_full_usage \
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"Options:" \
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"\n -P lp service to connect to (else uses $PRINTER)" \
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"\n -t Scan the queue every DELAY seconds" \
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"\n -d Delete job" \
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"\n -d Delete jobs" \
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"\n -f Force any waiting job to be printed" \
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"\n -s Short display" \
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#define lpr_trivial_usage \
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"-P lp[@host[:port]] -U USERNAME -J TITLE -Vmh [filenames]"
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"-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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#define lpr_full_usage \
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"Options:" \
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"\n -P lp service to connect to (else uses $PRINTER)"\
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"\n -m Send mail to LOGNAME@HOSTNAME" \
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"\n -h Banner or header for this job" \
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"\n -m Send mail on completion" \
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"\n -h Print banner page too" \
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"\n -V Verbose" \
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#define ls_trivial_usage \
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@ -4,5 +4,5 @@
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lib-y :=
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lib-$(CONFIG_LPR) += lpr.o parse_prt.o
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lib-$(CONFIG_LPQ) += lpq.o parse_prt.o
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lib-$(CONFIG_LPR) += lpr.o
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lib-$(CONFIG_LPQ) += lpr.o
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108
printutils/lpq.c
108
printutils/lpq.c
@ -1,108 +0,0 @@
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/* vi: set sw=4 ts=4: */
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/*
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* Copyright 2008 Walter Harms (WHarms@bfs.de)
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*
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* Licensed under the GPL v2, see the file LICENSE in this tarball.
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*/
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#include "libbb.h"
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#include "lpr.h"
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/*
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this is a *very* resticted form of lpq
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since we do not read /etc/printcap (and never will)
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we can only do things rfc1179 allows:
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- show print jobs for a given queue long/short form
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- remove a job from a given queue
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-P <queue>
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-s short
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-d delete job
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-f force any waiting job to be printed
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*/
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enum {
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LPQ_SHORT = 1 << 0,
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LPQ_DELETE = 1 << 1,
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LPQ_FORCE = 1 << 2,
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LPQ_P = 1 << 3,
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LPQ_t = 1 << 4,
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};
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/*
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print everthing that comes
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*/
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static void get_answer(int sockfd)
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{
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char buf[80];
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int n;
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buf[0] = '\n';
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while (1) {
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n = safe_read(sockfd, buf, sizeof(buf));
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if (n <= 0)
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break;
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full_write(STDOUT_FILENO, buf, n);
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buf[0] = buf[n-1]; /* last written char */
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}
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/* Don't leave last output line unterminated */
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if (buf[0] != '\n')
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full_write(STDOUT_FILENO, "\n", 1);
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}
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/*
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is this too simple ?
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should we support more ENV ?
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PRINTER, LPDEST, NPRINTER, NGPRINTER
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*/
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int lpq_main(int argc, char *argv[]) MAIN_EXTERNALLY_VISIBLE;
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int lpq_main(int argc, char *argv[])
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{
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struct netprint netprint;
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const char *netopt;
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const char *delopt = "0";
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int sockfd = sockfd; /* for compiler */
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unsigned opt;
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int delay; /* delay in [s] */
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netopt = NULL;
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opt = getopt32(argv, "sdfP:t:", &netopt, &delopt);
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argv += optind;
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delay = xatoi_u(delopt);
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parse_prt(netopt, &netprint);
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/* do connect */
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if (opt & (LPQ_FORCE|LPQ_DELETE))
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sockfd = xconnect_stream(netprint.lsa);
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/* force printing of every job still in queue */
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if (opt & LPQ_FORCE) {
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fdprintf(sockfd, "\x1" "%s", netprint.queue);
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get_answer(sockfd);
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return EXIT_SUCCESS;
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}
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/* delete job (better a list of jobs). username is now LOGNAME */
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if (opt & LPQ_DELETE) {
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while (*argv) {
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fdprintf(sockfd, "\x5" "%s %s %s",
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netprint.queue,
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getenv("LOGNAME"), /* FIXME - may be NULL? */
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*argv);
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get_answer(sockfd);
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argv++;
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}
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return EXIT_SUCCESS;
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}
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do {
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sockfd = xconnect_stream(netprint.lsa);
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fdprintf(sockfd, "%c%s\n", (opt & LPQ_SHORT) ? 3 : 4,
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netprint.queue);
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get_answer(sockfd);
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close(sockfd);
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sleep(delay);
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} while (delay != 0);
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return EXIT_SUCCESS;
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}
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364
printutils/lpr.c
364
printutils/lpr.c
@ -1,200 +1,236 @@
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/* vi: set sw=4 ts=4: */
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/*
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* Copyright 2008 Walter Harms (WHarms@bfs.de)
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* bare bones version of lpr & lpq: BSD printing utilities
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*
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* Licensed under the GPL v2, see the file LICENSE in this tarball.
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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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* Licensed under GPLv2, see file LICENSE in this tarball for details.
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*
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* See RFC 1179 for propocol description.
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*/
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#include "libbb.h"
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#include "lpr.h"
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static char *mygethostname31(void)
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{
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char *s = xzalloc(32);
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if (gethostname(s, 31) < 0)
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bb_perror_msg_and_die("gethostname");
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/* gethostname() does not guarantee NUL-termination. xzalloc does. */
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return s;
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}
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static int xmkstemp(char *temp_name)
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{
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int fd;
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fd = mkstemp(temp_name);
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if (fd < 0)
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bb_perror_msg_and_die("mkstemp");
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return fd;
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}
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/* lpd server sends NUL byte on success.
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* Else read the errormessage and exit.
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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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*/
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static void get_response(int server_sock, const char *emsg)
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static void get_response_or_say_and_die(const char *errmsg)
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{
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char buf = '\0';
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char buf = ' ';
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safe_read(server_sock, &buf, 1);
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if (buf != '\0') {
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bb_error_msg("%s. Server said:", emsg);
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fputc(buf, stderr);
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fflush(stdout);
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safe_read(STDOUT_FILENO, &buf, 1);
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if ('\0' != buf) {
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// request has failed
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bb_error_msg("error while %s. Server said:", errmsg);
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safe_write(STDERR_FILENO, &buf, 1);
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logmode = 0; /* no errors from bb_copyfd_eof() */
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bb_copyfd_eof(server_sock, STDERR_FILENO);
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bb_copyfd_eof(STDOUT_FILENO, STDERR_FILENO);
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xfunc_die();
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}
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}
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int lpr_main(int argc, char *argv[]) MAIN_EXTERNALLY_VISIBLE;
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int lpr_main(int argc, char *argv[])
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int lpqr_main(int argc, char *argv[]) MAIN_EXTERNALLY_VISIBLE;
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int lpqr_main(int argc, char *argv[])
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{
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struct netprint netprint;
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char temp_name[] = "/tmp/lprXXXXXX"; /* for mkstemp */
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char *strings[5];
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const char *netopt;
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const char *jobtitle;
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const char *hostname;
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const char *jobclass;
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char *username;
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int pid1000;
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int server_sock, tmp_fd;
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unsigned opt;
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enum {
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VERBOSE = 1 << 0,
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USE_HEADER = 1 << 1, /* -h: want banner printed */
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USE_MAIL = 1 << 2, /* -m: send mail back to user */
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OPT_U = 1 << 3, /* -U username */
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OPT_J = 1 << 4, /* -J title: the job title for the banner page */
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OPT_C = 1 << 5, /* -C class: job "class" (? supposedly printed on banner) */
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OPT_P = 1 << 6, /* -P queue[@host[:port]] */
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/* if no -P is given use $PRINTER, then "lp@localhost:515" */
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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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LPR_h = 1 << 3, // -h: want banner printed
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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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};
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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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const char *user = bb_getpwuid(NULL, -1, getuid());
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unsigned job;
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unsigned opts;
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int old_stdout, fd;
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/* Set defaults, parse options */
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hostname = mygethostname31();
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netopt = NULL;
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username = getenv("LOGNAME");
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if (username == NULL)
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username = (char*)"user"; /* TODO: getpwuid(getuid())->pw_name? */
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opt = getopt32(argv, "VhmU:J:C:P:",
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&username, &jobtitle, &jobclass, &netopt);
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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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argv += optind;
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parse_prt(netopt, &netprint);
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username = xstrndup(username, 31);
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/* For stdin we need to save it to a tempfile,
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* otherwise we can't know the size. */
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tmp_fd = -1;
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if (!*argv) {
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if (jobtitle == NULL)
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jobtitle = (char *) bb_msg_standard_input;
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tmp_fd = xmkstemp(temp_name);
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if (bb_copyfd_eof(STDIN_FILENO, tmp_fd) < 0)
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goto del_temp_file;
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/* TODO: we actually can have deferred write errors... */
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close(tmp_fd);
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argv--; /* back off from NULL */
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*argv = temp_name;
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// if queue is not specified -> use $PRINTER
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if (!(opts & OPT_P))
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queue = getenv("PRINTER");
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// if queue is still not specified ->
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if (!queue) {
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// ... queue defaults to "lp"
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// server defaults to "localhost"
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queue = "lp";
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// if queue is specified ->
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} else {
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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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}
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if (opt & VERBOSE)
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puts("connect to server");
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server_sock = xconnect_stream(netprint.lsa);
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// do connect
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fd = create_and_connect_stream_or_die(server, 515);
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// play with descriptors to save space: fdprintf > printf
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old_stdout = dup(STDOUT_FILENO);
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xmove_fd(fd, STDOUT_FILENO);
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/* "Receive a printer job" command */
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fdprintf(server_sock, "\x2" "%s\n", netprint.queue);
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get_response(server_sock, "set queue failed");
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pid1000 = getpid() % 1000;
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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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printf("\x5" "%s %s", queue, user);
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while (*argv) {
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char dfa_name[sizeof("dfAnnn") + 32];
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struct stat st;
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char **sptr;
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unsigned size;
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int fd;
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fd = xopen(*argv, O_RDONLY);
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/* "The name ... should start with ASCII "dfA",
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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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snprintf(dfa_name, sizeof(dfa_name),
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"dfA%03u%s", pid1000, hostname);
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pid1000 = (pid1000 + 1) % 1000;
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/*
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* Generate control file contents
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*/
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/* H HOST, P USER, l DATA_FILE_NAME, J JOBNAME */
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strings[0] = xasprintf("H%.32s\n" "P%.32s\n" "l%.32s\n"
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"J%.99s\n",
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hostname, username, dfa_name,
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(opt & OPT_J) ? jobtitle : *argv);
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sptr = &strings[1];
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/* C CLASS - printed on banner page (if L cmd is also given) */
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if (opt & OPT_C) /* [1] */
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*sptr++ = xasprintf("C%.32s\n", jobclass);
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/* M WHOM_TO_MAIL */
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if (opt & USE_MAIL) /* [2] */
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*sptr++ = xasprintf("M%.32s\n", username);
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/* H USER - print banner page, with given user's name */
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if (opt & USE_HEADER) /* [3] */
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*sptr++ = xasprintf("L%.32s\n", username);
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*sptr = NULL; /* [4] max */
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/* RFC 1179: "LPR servers MUST be able
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* to receive the control file subcommand first
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* and SHOULD be able to receive the data file
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* subcommand first".
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* Ok, we'll send control file first. */
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size = 0;
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sptr = strings;
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while (*sptr)
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size += strlen(*sptr++);
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if (opt & VERBOSE)
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puts("send control file");
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/* 2: "Receive control file" subcommand */
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fdprintf(server_sock, "\x2" "%u c%s\n", size, dfa_name + 1);
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sptr = strings;
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while (*sptr) {
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xwrite(server_sock, *sptr, strlen(*sptr));
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free(*sptr);
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sptr++;
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printf(" %s", *argv++);
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}
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free(strings);
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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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printf("%c" "%s\n", cmd, queue);
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bb_copyfd_eof(STDOUT_FILENO, old_stdout);
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}
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return EXIT_SUCCESS;
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}
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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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job = getpid() % 1000;
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// TODO: when do finally we invent char *xgethostname()?!!
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hostname = xzalloc(MAXHOSTNAMELEN+1);
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gethostname(hostname, MAXHOSTNAMELEN);
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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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|
||||
printf("\x2" "%s\n", queue);
|
||||
get_response_or_say_and_die("setting queue");
|
||||
|
||||
// process files
|
||||
do {
|
||||
struct stat st;
|
||||
char *c;
|
||||
char *remote_filename;
|
||||
char *controlfile;
|
||||
|
||||
// if data file is stdin, we need to dump it first
|
||||
if (LONE_DASH(*argv)) {
|
||||
strcpy(tempfile, "/tmp/lprXXXXXX");
|
||||
fd = mkstemp(tempfile);
|
||||
if (fd < 0)
|
||||
bb_perror_msg_and_die("mkstemp");
|
||||
bb_copyfd_eof(STDIN_FILENO, fd);
|
||||
xlseek(fd, 0, SEEK_SET);
|
||||
*argv = (char*)bb_msg_standard_input;
|
||||
} else {
|
||||
fd = xopen(*argv, O_RDONLY);
|
||||
}
|
||||
|
||||
/* "The name ... should start with ASCII "cfA",
|
||||
* followed by a three digit job number, followed
|
||||
* by the host name which has constructed the file."
|
||||
* We supply 'c' or 'd' as needed for control/data file. */
|
||||
remote_filename = xasprintf("fA%03u%s", job, hostname);
|
||||
|
||||
// create control file
|
||||
// TODO: all lines but 2 last are constants! How we can use this fact?
|
||||
controlfile = xasprintf(
|
||||
"H" "%.32s\n" "P" "%.32s\n" /* H HOST, P USER */
|
||||
"C" "%.32s\n" /* C CLASS - printed on banner page (if L cmd is also given) */
|
||||
"J" "%.99s\n" /* J JOBNAME */
|
||||
/* "class name for banner page and job name
|
||||
* for banner page commands must precede L command" */
|
||||
"L" "%.32s\n" /* L USER - print banner page, with given user's name */
|
||||
"M" "%.32s\n" /* M WHOM_TO_MAIL */
|
||||
"l" "d%.31s\n" /* l DATA_FILE_NAME ("dfAxxx") */
|
||||
, hostname, user
|
||||
, printer_class /* can be "" */
|
||||
, ((opts & LPR_J) ? job_title : *argv)
|
||||
, (opts & LPR_h) ? user : ""
|
||||
, (opts & LPR_m) ? user : ""
|
||||
, remote_filename
|
||||
);
|
||||
// delete possible "\nX\n" patterns
|
||||
while ((c = strchr(controlfile, '\n')) != NULL && c[1] && c[2] == '\n')
|
||||
memmove(c, c+2, strlen(c+1)); /* strlen(c+1) == strlen(c+2) + 1 */
|
||||
|
||||
// send control file
|
||||
if (opts & LPR_V)
|
||||
bb_error_msg("sending control file");
|
||||
/* "Once all of the contents have
|
||||
* been delivered, an octet of zero bits is sent as
|
||||
* an indication that the file being sent is complete.
|
||||
* A second level of acknowledgement processing
|
||||
* must occur at this point." */
|
||||
xwrite(server_sock, "", 1);
|
||||
get_response(server_sock, "send control file failed");
|
||||
printf("\x2" "%u %s\n" "c%s" "%c",
|
||||
(unsigned)strlen(controlfile),
|
||||
remote_filename, controlfile, '\0');
|
||||
get_response_or_say_and_die("sending control file");
|
||||
|
||||
/* Sending data */
|
||||
st.st_size = 0; /* paranoia */
|
||||
// send data file, with name "dfaXXX"
|
||||
if (opts & LPR_V)
|
||||
bb_error_msg("sending data file");
|
||||
st.st_size = 0; /* paranoia: fstat may theoretically fail */
|
||||
fstat(fd, &st);
|
||||
if (opt & VERBOSE)
|
||||
puts("send data file");
|
||||
/* 3: "Receive data file" subcommand */
|
||||
fdprintf(server_sock, "\x3" "%"OFF_FMT"u %s\n", st.st_size, dfa_name);
|
||||
/* TODO: if file shrank and we wrote less than st.st_size,
|
||||
* pad output with NUL bytes? Otherwise server won't know
|
||||
* that we are done. */
|
||||
if (bb_copyfd_size(fd, server_sock, st.st_size) < 0)
|
||||
xfunc_die();
|
||||
printf("\x3" "%"OFF_FMT"u d%s\n", st.st_size, remote_filename);
|
||||
if (bb_copyfd_size(fd, STDOUT_FILENO, st.st_size) != st.st_size) {
|
||||
// We're screwed. We sent less bytes than we advertised.
|
||||
bb_error_msg_and_die("local file changed size?!");
|
||||
}
|
||||
bb_putchar('\0');
|
||||
get_response_or_say_and_die("sending data file");
|
||||
|
||||
// delete temporary file if we dumped stdin
|
||||
if (*argv == (char*)bb_msg_standard_input)
|
||||
unlink(tempfile);
|
||||
|
||||
// cleanup
|
||||
close(fd);
|
||||
xwrite(server_sock, "", 1);
|
||||
get_response(server_sock, "send file failed");
|
||||
free(remote_filename);
|
||||
free(controlfile);
|
||||
|
||||
argv++;
|
||||
}
|
||||
// next, please!
|
||||
job = (job + 1) % 1000;
|
||||
} while (*++argv);
|
||||
|
||||
if (ENABLE_FEATURE_CLEAN_UP)
|
||||
close(server_sock);
|
||||
|
||||
if (tmp_fd >= 0) {
|
||||
del_temp_file:
|
||||
unlink(temp_name);
|
||||
}
|
||||
|
||||
return 0;
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
@ -1,17 +0,0 @@
|
||||
/* vi: set sw=4 ts=4: */
|
||||
/*
|
||||
* Copyright 2008 Walter Harms (WHarms@bfs.de)
|
||||
*
|
||||
* Licensed under the GPL v2, see the file LICENSE in this tarball.
|
||||
*/
|
||||
#ifndef _LPR_H_
|
||||
#define _LPR_H_
|
||||
|
||||
struct netprint {
|
||||
char *queue;
|
||||
char *server;
|
||||
struct len_and_sockaddr *lsa;
|
||||
};
|
||||
|
||||
void parse_prt(const char *buf, struct netprint *netprint);
|
||||
#endif
|
||||
@ -1,27 +0,0 @@
|
||||
/* vi: set sw=4 ts=4: */
|
||||
/*
|
||||
* Copyright 2008 Walter Harms (WHarms@bfs.de)
|
||||
*
|
||||
* Licensed under the GPL v2, see the file LICENSE in this tarball.
|
||||
*/
|
||||
#include "libbb.h"
|
||||
#include "lpr.h"
|
||||
|
||||
void parse_prt(const char *buf, struct netprint *netprint)
|
||||
{
|
||||
const char *p;
|
||||
|
||||
if (!buf) {
|
||||
buf = getenv("PRINTER");
|
||||
if (!buf)
|
||||
buf = "lp"; /* "...@localhost:515" is implied */
|
||||
}
|
||||
p = strchrnul(buf, '@');
|
||||
netprint->queue = xstrndup(buf, p - buf);
|
||||
if (!*p) /* just queue? example: "lpq -Pcopie" */
|
||||
p = "localhost";
|
||||
netprint->server = xstrdup(p);
|
||||
|
||||
netprint->lsa = xhost2sockaddr(netprint->server,
|
||||
bb_lookup_port(NULL, "tcp", 515));
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user