diff options
| -rw-r--r-- | include/applets.h | 4 | ||||
| -rw-r--r-- | include/usage.h | 13 | ||||
| -rw-r--r-- | printutils/Kbuild | 4 | ||||
| -rw-r--r-- | printutils/lpq.c | 108 | ||||
| -rw-r--r-- | printutils/lpr.c | 364 | ||||
| -rw-r--r-- | printutils/lpr.h | 17 | ||||
| -rw-r--r-- | printutils/parse_prt.c | 27 |
7 files changed, 211 insertions, 326 deletions
diff --git a/include/applets.h b/include/applets.h index f2de31c..ffd7afc 100644 --- a/include/applets.h +++ b/include/applets.h @@ -227,8 +227,8 @@ USE_LOGIN(APPLET(login, _BB_DIR_BIN, _BB_SUID_ALWAYS)) USE_LOGNAME(APPLET_NOFORK(logname, logname, _BB_DIR_USR_BIN, _BB_SUID_NEVER, logname)) USE_LOGREAD(APPLET(logread, _BB_DIR_SBIN, _BB_SUID_NEVER)) USE_LOSETUP(APPLET(losetup, _BB_DIR_SBIN, _BB_SUID_NEVER)) -USE_LPQ(APPLET(lpq, _BB_DIR_USR_BIN, _BB_SUID_NEVER)) -USE_LPR(APPLET(lpr, _BB_DIR_USR_BIN, _BB_SUID_NEVER)) +USE_LPQ(APPLET_ODDNAME(lpq, lpqr, _BB_DIR_USR_BIN, _BB_SUID_NEVER, lpq)) +USE_LPR(APPLET_ODDNAME(lpr, lpqr, _BB_DIR_USR_BIN, _BB_SUID_NEVER, lpr)) USE_LS(APPLET_NOEXEC(ls, ls, _BB_DIR_BIN, _BB_SUID_NEVER, ls)) USE_LSATTR(APPLET(lsattr, _BB_DIR_BIN, _BB_SUID_NEVER)) USE_LSMOD(APPLET(lsmod, _BB_DIR_SBIN, _BB_SUID_NEVER)) diff --git a/include/usage.h b/include/usage.h index 11d3e3a..c9329b3 100644 --- a/include/usage.h +++ b/include/usage.h @@ -2052,22 +2052,23 @@ USE_FEATURE_BRCTL_FANCY("\n" \ "losetup -f will show the first loop free loop device\n\n" #define lpq_trivial_usage \ - "[-P lp[@host[:port]]] [-t DELAY] [-d JOBID] [-fs]" + "[-P queue[@host[:port]]] [-U USERNAME] [-d JOBID...] [-fs]" #define lpq_full_usage \ "Options:" \ "\n -P lp service to connect to (else uses $PRINTER)" \ - "\n -t Scan the queue every DELAY seconds" \ - "\n -d Delete job" \ + "\n -d Delete jobs" \ "\n -f Force any waiting job to be printed" \ "\n -s Short display" \ #define lpr_trivial_usage \ - "-P lp[@host[:port]] -U USERNAME -J TITLE -Vmh [filenames]" + "-P queue[@host[:port]] -U USERNAME -J TITLE -Vmh [FILE...]" +/* -C CLASS exists too, not shown. + * CLASS is supposed to be printed on banner page, if one is requested */ #define lpr_full_usage \ "Options:" \ "\n -P lp service to connect to (else uses $PRINTER)"\ - "\n -m Send mail to LOGNAME@HOSTNAME" \ - "\n -h Banner or header for this job" \ + "\n -m Send mail on completion" \ + "\n -h Print banner page too" \ "\n -V Verbose" \ #define ls_trivial_usage \ diff --git a/printutils/Kbuild b/printutils/Kbuild index f322723..4f97d0d 100644 --- a/printutils/Kbuild +++ b/printutils/Kbuild @@ -4,5 +4,5 @@ lib-y := -lib-$(CONFIG_LPR) += lpr.o parse_prt.o -lib-$(CONFIG_LPQ) += lpq.o parse_prt.o +lib-$(CONFIG_LPR) += lpr.o +lib-$(CONFIG_LPQ) += lpr.o diff --git a/printutils/lpq.c b/printutils/lpq.c deleted file mode 100644 index ce9a10c..0000000 --- a/printutils/lpq.c +++ /dev/null @@ -1,108 +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" - -/* - this is a *very* resticted form of lpq - since we do not read /etc/printcap (and never will) - we can only do things rfc1179 allows: - - show print jobs for a given queue long/short form - - remove a job from a given queue - - -P <queue> - -s short - -d delete job - -f force any waiting job to be printed -*/ -enum { - LPQ_SHORT = 1 << 0, - LPQ_DELETE = 1 << 1, - LPQ_FORCE = 1 << 2, - LPQ_P = 1 << 3, - LPQ_t = 1 << 4, -}; - -/* - print everthing that comes -*/ -static void get_answer(int sockfd) -{ - char buf[80]; - int n; - - buf[0] = '\n'; - while (1) { - n = safe_read(sockfd, buf, sizeof(buf)); - if (n <= 0) - break; - full_write(STDOUT_FILENO, buf, n); - buf[0] = buf[n-1]; /* last written char */ - } - - /* Don't leave last output line unterminated */ - if (buf[0] != '\n') - full_write(STDOUT_FILENO, "\n", 1); -} - -/* - is this too simple ? - should we support more ENV ? - PRINTER, LPDEST, NPRINTER, NGPRINTER -*/ -int lpq_main(int argc, char *argv[]) MAIN_EXTERNALLY_VISIBLE; -int lpq_main(int argc, char *argv[]) -{ - struct netprint netprint; - const char *netopt; - const char *delopt = "0"; - int sockfd = sockfd; /* for compiler */ - unsigned opt; - int delay; /* delay in [s] */ - - netopt = NULL; - opt = getopt32(argv, "sdfP:t:", &netopt, &delopt); - argv += optind; - delay = xatoi_u(delopt); - parse_prt(netopt, &netprint); - - /* do connect */ - if (opt & (LPQ_FORCE|LPQ_DELETE)) - sockfd = xconnect_stream(netprint.lsa); - - /* force printing of every job still in queue */ - if (opt & LPQ_FORCE) { - fdprintf(sockfd, "\x1" "%s", netprint.queue); - get_answer(sockfd); - return EXIT_SUCCESS; - } - - /* delete job (better a list of jobs). username is now LOGNAME */ - if (opt & LPQ_DELETE) { - while (*argv) { - fdprintf(sockfd, "\x5" "%s %s %s", - netprint.queue, - getenv("LOGNAME"), /* FIXME - may be NULL? */ - *argv); - get_answer(sockfd); - argv++; - } - return EXIT_SUCCESS; - } - - do { - sockfd = xconnect_stream(netprint.lsa); - fdprintf(sockfd, "%c%s\n", (opt & LPQ_SHORT) ? 3 : 4, - netprint.queue); - - get_answer(sockfd); - close(sockfd); - sleep(delay); - } while (delay != 0); - - return EXIT_SUCCESS; -} diff --git a/printutils/lpr.c b/printutils/lpr.c index 8650710..ea0e210 100644 --- a/printutils/lpr.c +++ b/printutils/lpr.c @@ -1,200 +1,236 @@ /* vi: set sw=4 ts=4: */ /* - * Copyright 2008 Walter Harms (WHarms@bfs.de) + * bare bones version of lpr & lpq: BSD printing utilities * - * Licensed under the GPL v2, see the file LICENSE in this tarball. + * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com> + * + * Original idea and code: + * Walter Harms <WHarms@bfs.de> + * + * Licensed under GPLv2, see file LICENSE in this tarball for details. + * + * See RFC 1179 for propocol description. */ #include "libbb.h" -#include "lpr.h" - -static char *mygethostname31(void) -{ - char *s = xzalloc(32); - if (gethostname(s, 31) < 0) - bb_perror_msg_and_die("gethostname"); - /* gethostname() does not guarantee NUL-termination. xzalloc does. */ - return s; -} - -static int xmkstemp(char *temp_name) -{ - int fd; - fd = mkstemp(temp_name); - if (fd < 0) - bb_perror_msg_and_die("mkstemp"); - return fd; -} - -/* lpd server sends NUL byte on success. - * Else read the errormessage and exit. +/* + * LPD returns binary 0 on success. + * Otherwise it returns error message. */ -static void get_response(int server_sock, const char *emsg) +static void get_response_or_say_and_die(const char *errmsg) { - char buf = '\0'; + char buf = ' '; + + fflush(stdout); - safe_read(server_sock, &buf, 1); - if (buf != '\0') { - bb_error_msg("%s. Server said:", emsg); - fputc(buf, stderr); + safe_read(STDOUT_FILENO, &buf, 1); + if ('\0' != buf) { + // request has failed + bb_error_msg("error while %s. Server said:", errmsg); + safe_write(STDERR_FILENO, &buf, 1); logmode = 0; /* no errors from bb_copyfd_eof() */ - bb_copyfd_eof(server_sock, STDERR_FILENO); + bb_copyfd_eof(STDOUT_FILENO, STDERR_FILENO); xfunc_die(); } } -int lpr_main(int argc, char *argv[]) MAIN_EXTERNALLY_VISIBLE; -int lpr_main(int argc, char *argv[]) +int lpqr_main(int argc, char *argv[]) MAIN_EXTERNALLY_VISIBLE; +int lpqr_main(int argc, char *argv[]) { - struct netprint netprint; - char temp_name[] = "/tmp/lprXXXXXX"; /* for mkstemp */ - char *strings[5]; - const char *netopt; - const char *jobtitle; - const char *hostname; - const char *jobclass; - char *username; - int pid1000; - int server_sock, tmp_fd; - unsigned opt; enum { - VERBOSE = 1 << 0, - USE_HEADER = 1 << 1, /* -h: want banner printed */ - USE_MAIL = 1 << 2, /* -m: send mail back to user */ - OPT_U = 1 << 3, /* -U username */ - OPT_J = 1 << 4, /* -J title: the job title for the banner page */ - OPT_C = 1 << 5, /* -C class: job "class" (? supposedly printed on banner) */ - OPT_P = 1 << 6, /* -P queue[@host[:port]] */ - /* if no -P is given use $PRINTER, then "lp@localhost:515" */ + OPT_P = 1 << 0, // -P queue[@host[:port]]. If no -P is given use $PRINTER, then "lp@localhost:515" + OPT_U = 1 << 1, // -U username + + LPR_V = 1 << 2, // -V: be verbose + LPR_h = 1 << 3, // -h: want banner printed + LPR_C = 1 << 4, // -C class: job "class" (? supposedly printed on banner) + LPR_J = 1 << 5, // -J title: the job title for the banner page + LPR_m = 1 << 6, // -m: send mail back to user + + LPQ_SHORT_FMT = 1 << 2, // -s: short listing format + LPQ_DELETE = 1 << 3, // -d: delete job(s) + LPQ_FORCE = 1 << 4, // -f: force waiting job(s) to be printed }; - - /* Set defaults, parse options */ - hostname = mygethostname31(); - netopt = NULL; - username = getenv("LOGNAME"); - if (username == NULL) - username = (char*)"user"; /* TODO: getpwuid(getuid())->pw_name? */ - opt = getopt32(argv, "VhmU:J:C:P:", - &username, &jobtitle, &jobclass, &netopt); + char tempfile[sizeof("/tmp/lprXXXXXX")]; + const char *job_title; + const char *printer_class = ""; // printer class, max 32 char + const char *queue; // name of printer queue + const char *server = "localhost"; // server[:port] of printer queue + char *hostname; + // N.B. IMHO getenv("USER") can be way easily spoofed! + const char *user = bb_getpwuid(NULL, -1, getuid()); + unsigned job; + unsigned opts; + int old_stdout, fd; + + // parse options + // TODO: set opt_complementary: s,d,f are mutually exclusive + opts = getopt32(argv, + (/*lp*/'r' == applet_name[2]) ? "P:U:VhC:J:m" : "P:U:sdf" + , &queue, &user + , &printer_class, &job_title + ); argv += optind; - parse_prt(netopt, &netprint); - username = xstrndup(username, 31); - - /* For stdin we need to save it to a tempfile, - * otherwise we can't know the size. */ - tmp_fd = -1; - if (!*argv) { - if (jobtitle == NULL) - jobtitle = (char *) bb_msg_standard_input; - - tmp_fd = xmkstemp(temp_name); - if (bb_copyfd_eof(STDIN_FILENO, tmp_fd) < 0) - goto del_temp_file; - /* TODO: we actually can have deferred write errors... */ - close(tmp_fd); - argv--; /* back off from NULL */ - *argv = temp_name; + + // if queue is not specified -> use $PRINTER + if (!(opts & OPT_P)) + queue = getenv("PRINTER"); + // if queue is still not specified -> + if (!queue) { + // ... queue defaults to "lp" + // server defaults to "localhost" + queue = "lp"; + // if queue is specified -> + } else { + // queue name is to the left of '@' + char *s = strchr(queue, '@'); + if (s) { + // server name is to the right of '@' + *s = '\0'; + server = s + 1; + } } - if (opt & VERBOSE) - puts("connect to server"); - server_sock = xconnect_stream(netprint.lsa); + // do connect + fd = create_and_connect_stream_or_die(server, 515); + // play with descriptors to save space: fdprintf > printf + old_stdout = dup(STDOUT_FILENO); + xmove_fd(fd, STDOUT_FILENO); + + // + // LPQ ------------------------ + // + if (/*lp*/'q' == applet_name[2]) { + char cmd; + // force printing of every job still in queue + if (opts & LPQ_FORCE) { + cmd = 1; + goto command; + // delete job(s) + } else if (opts & LPQ_DELETE) { + printf("\x5" "%s %s", queue, user); + while (*argv) { + printf(" %s", *argv++); + } + bb_putchar('\n'); + // dump current jobs status + // N.B. periodical polling should be achieved + // via "watch -n delay lpq" + // They say it's the UNIX-way :) + } else { + cmd = (opts & LPQ_SHORT_FMT) ? 3 : 4; + command: + printf("%c" "%s\n", cmd, queue); + bb_copyfd_eof(STDOUT_FILENO, old_stdout); + } - /* "Receive a printer job" command */ - fdprintf(server_sock, "\x2" "%s\n", netprint.queue); - get_response(server_sock, "set queue failed"); + return EXIT_SUCCESS; + } - pid1000 = getpid() % 1000; - while (*argv) { - char dfa_name[sizeof("dfAnnn") + 32]; - struct stat st; - char **sptr; - unsigned size; - int fd; + // + // LPR ------------------------ + // + if (opts & LPR_V) + bb_error_msg("connected to server"); - fd = xopen(*argv, O_RDONLY); + job = getpid() % 1000; + // TODO: when do finally we invent char *xgethostname()?!! + hostname = xzalloc(MAXHOSTNAMELEN+1); + gethostname(hostname, MAXHOSTNAMELEN); - /* "The name ... should start with ASCII "dfA", - * followed by a three digit job number, followed - * by the host name which has constructed the file." */ - snprintf(dfa_name, sizeof(dfa_name), - "dfA%03u%s", pid1000, hostname); - pid1000 = (pid1000 + 1) % 1000; - - /* - * Generate control file contents - */ - /* H HOST, P USER, l DATA_FILE_NAME, J JOBNAME */ - strings[0] = xasprintf("H%.32s\n" "P%.32s\n" "l%.32s\n" - "J%.99s\n", - hostname, username, dfa_name, - (opt & OPT_J) ? jobtitle : *argv); - sptr = &strings[1]; - /* C CLASS - printed on banner page (if L cmd is also given) */ - if (opt & OPT_C) /* [1] */ - *sptr++ = xasprintf("C%.32s\n", jobclass); - /* M WHOM_TO_MAIL */ - if (opt & USE_MAIL) /* [2] */ - *sptr++ = xasprintf("M%.32s\n", username); - /* H USER - print banner page, with given user's name */ - if (opt & USE_HEADER) /* [3] */ - *sptr++ = xasprintf("L%.32s\n", username); - *sptr = NULL; /* [4] max */ - - /* RFC 1179: "LPR servers MUST be able - * to receive the control file subcommand first - * and SHOULD be able to receive the data file - * subcommand first". - * Ok, we'll send control file first. */ - size = 0; - sptr = strings; - while (*sptr) - size += strlen(*sptr++); - if (opt & VERBOSE) - puts("send control file"); - /* 2: "Receive control file" subcommand */ - fdprintf(server_sock, "\x2" "%u c%s\n", size, dfa_name + 1); - sptr = strings; - while (*sptr) { - xwrite(server_sock, *sptr, strlen(*sptr)); - free(*sptr); - sptr++; + // no files given on command line? -> use stdin + if (!*argv) + *--argv = (char *)"-"; + + 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); } - free(strings); + + /* "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"); - - /* Sending data */ - st.st_size = 0; /* paranoia */ + printf("\x2" "%u %s\n" "c%s" "%c", + (unsigned)strlen(controlfile), + remote_filename, controlfile, '\0'); + get_response_or_say_and_die("sending control file"); + + // 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(); - close(fd); - xwrite(server_sock, "", 1); - get_response(server_sock, "send file failed"); + 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"); - argv++; - } + // delete temporary file if we dumped stdin + if (*argv == (char*)bb_msg_standard_input) + unlink(tempfile); - if (ENABLE_FEATURE_CLEAN_UP) - close(server_sock); + // cleanup + close(fd); + free(remote_filename); + free(controlfile); - if (tmp_fd >= 0) { - del_temp_file: - unlink(temp_name); - } + // next, please! + job = (job + 1) % 1000; + } while (*++argv); - return 0; + return EXIT_SUCCESS; } diff --git a/printutils/lpr.h b/printutils/lpr.h deleted file mode 100644 index 8898b98..0000000 --- a/printutils/lpr.h +++ /dev/null @@ -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 diff --git a/printutils/parse_prt.c b/printutils/parse_prt.c deleted file mode 100644 index 2de0a92..0000000 --- a/printutils/parse_prt.c +++ /dev/null @@ -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)); -} |