/* Unix SMB/CIFS implementation. printcap parsing Copyright (C) Karl Auer 1993-1998 Re-working by Martin Kiff, 1994 Re-written again by Andrew Tridgell Modified for SVID support by Norm Jacobs, 1997 Modified for CUPS support by Michael Sweet, 1999 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* * This module contains code to parse and cache printcap data, possibly * in concert with the CUPS/SYSV/AIX-specific code found elsewhere. * * The way this module looks at the printcap file is very simplistic. * Only the local printcap file is inspected (no searching of NIS * databases etc). * * There are assumed to be one or more printer names per record, held * as a set of sub-fields separated by vertical bar symbols ('|') in the * first field of the record. The field separator is assumed to be a colon * ':' and the record separator a newline. * * Lines ending with a backspace '\' are assumed to flag that the following * line is a continuation line so that a set of lines can be read as one * printcap entry. * * A line stating with a hash '#' is assumed to be a comment and is ignored * Comments are discarded before the record is strung together from the * set of continuation lines. * * Opening a pipe for "lpc status" and reading that would probably * be pretty effective. Code to do this already exists in the freely * distributable PCNFS server code. * * Modified to call SVID/XPG4 support if printcap name is set to "lpstat" * in smb.conf under Solaris. * * Modified to call CUPS support if printcap name is set to "cups" * in smb.conf. * * Modified to call iPrint support if printcap name is set to "iprint" * in smb.conf. */ #include "includes.h" struct pcap_cache { char *name; char *comment; struct pcap_cache *next; }; /* The systemwide printcap cache. */ static struct pcap_cache *pcap_cache = NULL; bool pcap_cache_add_specific(struct pcap_cache **ppcache, const char *name, const char *comment) { struct pcap_cache *p; if (name == NULL || ((p = SMB_MALLOC_P(struct pcap_cache)) == NULL)) return false; p->name = SMB_STRDUP(name); p->comment = (comment && *comment) ? SMB_STRDUP(comment) : NULL; DEBUG(11,("pcap_cache_add_specific: Adding name %s info %s\n", p->name, p->comment ? p->comment : "")); p->next = *ppcache; *ppcache = p; return true; } void pcap_cache_destroy_specific(struct pcap_cache **pp_cache) { struct pcap_cache *p, *next; for (p = *pp_cache; p != NULL; p = next) { next = p->next; SAFE_FREE(p->name); SAFE_FREE(p->comment); SAFE_FREE(p); } *pp_cache = NULL; } bool pcap_cache_add(const char *name, const char *comment) { return pcap_cache_add_specific(&pcap_cache, name, comment); } bool pcap_cache_loaded(void) { return (pcap_cache != NULL); } void pcap_cache_replace(const struct pcap_cache *pcache) { const struct pcap_cache *p; pcap_cache_destroy_specific(&pcap_cache); for (p = pcache; p; p = p->next) { pcap_cache_add(p->name, p->comment); } } void pcap_cache_reload(void) { const char *pcap_name = lp_printcapname(); bool pcap_reloaded = False; struct pcap_cache *tmp_cache = NULL; XFILE *pcap_file; char *pcap_line; DEBUG(3, ("reloading printcap cache\n")); /* only go looking if no printcap name supplied */ if (pcap_name == NULL || *pcap_name == 0) { DEBUG(0, ("No printcap file name configured!\n")); return; } tmp_cache = pcap_cache; pcap_cache = NULL; #ifdef HAVE_CUPS if (strequal(pcap_name, "cups")) { pcap_reloaded = cups_cache_reload(); goto done; } #endif #ifdef HAVE_IPRINT if (strequal(pcap_name, "iprint")) { pcap_reloaded = iprint_cache_reload(); goto done; } #endif #if defined(SYSV) || defined(HPUX) if (strequal(pcap_name, "lpstat")) { pcap_reloaded = sysv_cache_reload(); goto done; } #endif #ifdef AIX if (strstr_m(pcap_name, "/qconfig") != NULL) { pcap_reloaded = aix_cache_reload(); goto done; } #endif /* handle standard printcap - moved from pcap_printer_fn() */ if ((pcap_file = x_fopen(pcap_name, O_RDONLY, 0)) == NULL) { DEBUG(0, ("Unable to open printcap file %s for read!\n", pcap_name)); goto done; } for (; (pcap_line = fgets_slash(NULL, 1024, pcap_file)) != NULL; free(pcap_line)) { char name[MAXPRINTERLEN+1]; char comment[62]; char *p, *q; if (*pcap_line == '#' || *pcap_line == 0) continue; /* now we have a real printer line - cut at the first : */ if ((p = strchr_m(pcap_line, ':')) != NULL) *p = 0; /* * now find the most likely printer name and comment * this is pure guesswork, but it's better than nothing */ for (*name = *comment = 0, p = pcap_line; p != NULL; p = q) { bool has_punctuation; if ((q = strchr_m(p, '|')) != NULL) *q++ = 0; has_punctuation = (strchr_m(p, ' ') || strchr_m(p, '\t') || strchr_m(p, '(') || strchr_m(p, ')')); if (strlen(p) > strlen(comment) && has_punctuation) { strlcpy(comment, p, sizeof(comment)); continue; } if (strlen(p) <= MAXPRINTERLEN && strlen(p) > strlen(name) && !has_punctuation) { if (!*comment) { strlcpy(comment, name, sizeof(comment)); } strlcpy(name, p, sizeof(name)); continue; } if (!strchr_m(comment, ' ') && strlen(p) > strlen(comment)) { strlcpy(comment, p, sizeof(comment)); continue; } } comment[60] = 0; name[MAXPRINTERLEN] = 0; if (*name && !pcap_cache_add(name, comment)) { x_fclose(pcap_file); goto done; } } x_fclose(pcap_file); pcap_reloaded = True; done: DEBUG(3, ("reload status: %s\n", (pcap_reloaded) ? "ok" : "error")); if (pcap_reloaded) pcap_cache_destroy_specific(&tmp_cache); else { pcap_cache_destroy_specific(&pcap_cache); pcap_cache = tmp_cache; } return; } bool pcap_printername_ok(const char *printername) { struct pcap_cache *p; for (p = pcap_cache; p != NULL; p = p->next) if (strequal(p->name, printername)) return True; return False; } /*************************************************************************** run a function on each printer name in the printcap file. ***************************************************************************/ void pcap_printer_fn_specific(const struct pcap_cache *pc, void (*fn)(const char *, const char *, void *), void *pdata) { const struct pcap_cache *p; for (p = pc; p != NULL; p = p->next) fn(p->name, p->comment, pdata); return; } void pcap_printer_fn(void (*fn)(const char *, const char *, void *), void *pdata) { pcap_printer_fn_specific(pcap_cache, fn, pdata); }