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Diffstat (limited to 'source3/printing/print_standard.c')
| -rw-r--r-- | source3/printing/print_standard.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/source3/printing/print_standard.c b/source3/printing/print_standard.c new file mode 100644 index 0000000..7cbdac7 --- /dev/null +++ b/source3/printing/print_standard.c @@ -0,0 +1,157 @@ +/* + 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. + */ + +/* printcap parsing specific code moved here from printing/pcap.c */ + + +#include "includes.h" +#include "system/filesys.h" +#include "printing/pcap.h" + +/* handle standard printcap - moved from pcap_printer_fn() */ +bool std_pcap_cache_reload(const char *pcap_name, struct pcap_cache **_pcache) +{ + TALLOC_CTX *frame = talloc_stackframe(); + FILE *pcap_file; + char *pcap_line; + struct pcap_cache *pcache = NULL; + bool print_warning = false; + + if ((pcap_file = fopen(pcap_name, "r")) == NULL) { + DEBUG(0, ("Unable to open printcap file %s for read!\n", pcap_name)); + talloc_free(frame); + return false; + } + + while ((pcap_line = fgets_slash(frame, NULL, 1024, + pcap_file)) != NULL) { + char *name = NULL; + char *comment = NULL; + char *p, *q; + + if (*pcap_line == '#' || *pcap_line == 0) { + TALLOC_FREE(pcap_line); + 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 (p = pcap_line; p != NULL; p = q) { + bool has_punctuation = false; + + if ((q = strchr_m(p, '|')) != NULL) + *q++ = 0; + + has_punctuation = (strchr_m(p, ' ') || + strchr_m(p, '\t') || + strchr_m(p, '"') || + strchr_m(p, '\'') || + strchr_m(p, ';') || + strchr_m(p, ',') || + strchr_m(p, '(') || + strchr_m(p, ')')); + + if (name == NULL && !has_punctuation) { + name = talloc_strdup(frame, p); + TALLOC_FREE(pcap_line); + continue; + } + + if (has_punctuation) { + comment = talloc_strdup(frame, p); + TALLOC_FREE(pcap_line); + continue; + } + } + + if (name != NULL) { + bool ok; + + if (!print_warning && strlen(name) > MAXPRINTERLEN) { + print_warning = true; + } + + ok = pcap_cache_add_specific(&pcache, + name, + comment, + NULL); + if (!ok) { + fclose(pcap_file); + pcap_cache_destroy_specific(&pcache); + talloc_free(frame); + return false; + } + } + TALLOC_FREE(name); + TALLOC_FREE(comment); + TALLOC_FREE(pcap_line); + } + + if (print_warning) { + DBG_WARNING("WARNING: You have some printer names that are " + "longer than %u characters. These may not be " + "accessible to some older clients!\n", + (unsigned int)MAXPRINTERLEN); + } + + fclose(pcap_file); + *_pcache = pcache; + talloc_free(frame); + return true; +} |