/usr.sbin/lpr/chkprintcap/skimprintcap.c
C | 260 lines | 156 code | 26 blank | 78 comment | 47 complexity | d2a7333ad20f6419927067a3785cf781 MD5 | raw file
Possible License(s): MPL-2.0-no-copyleft-exception, BSD-3-Clause, LGPL-2.0, LGPL-2.1, BSD-2-Clause, 0BSD, JSON, AGPL-1.0, GPL-2.0
- /*
- * ------+---------+---------+---------+---------+---------+---------+---------*
- * Copyright (c) 2001 - Garance Alistair Drosehn <gad@FreeBSD.org>.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The views and conclusions contained in the software and documentation
- * are those of the authors and should not be interpreted as representing
- * official policies, either expressed or implied, of the FreeBSD Project.
- *
- * ------+---------+---------+---------+---------+---------+---------+---------*
- */
- #include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */
- __FBSDID("$FreeBSD$");
- #include <sys/types.h>
- #include <ctype.h>
- #include <err.h>
- #include <errno.h>
- #include <grp.h>
- #include <stdio.h>
- #include <string.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <sys/param.h> /* needed for lp.h but not used here */
- #include <dirent.h> /* ditto */
- #include "lp.h"
- #include "lp.local.h"
- #include "skimprintcap.h"
- /*
- * Save the canonical queue name of the entry that is currently being
- * scanned, in case a warning message is printed for the current queue.
- * Only the first 'QENTRY_MAXLEN' characters will be saved, since this
- * is only for warning messages. The variable includes space for the
- * string " (entry " and a trailing ")", when the scanner is in the
- * middle of an entry. When the scanner is not in a specific entry,
- * the variable will be the a null string.
- */
- #define QENTRY_MAXLEN 30
- #define QENTRY_PREFIX " (entry "
- static char skim_entryname[sizeof(QENTRY_PREFIX) + QENTRY_MAXLEN + 2];
- /*
- * isgraph is defined to work on an 'int', in the range 0 to 255, plus EOF.
- * Define a wrapper which can take 'char', either signed or unsigned.
- */
- #define isgraphch(Anychar) isgraph(((int) Anychar) & 255)
- struct skiminfo *
- skim_printcap(const char *pcap_fname, int verbosity)
- {
- struct skiminfo *skinf;
- char buff[BUFSIZ];
- char *ch, *curline, *endfield, *lastchar;
- FILE *pc_file;
- int missing_nl;
- enum {NO_CONTINUE, WILL_CONTINUE, BAD_CONTINUE} is_cont, had_cont;
- enum {CMNT_LINE, ENTRY_LINE, TAB_LINE, TABERR_LINE} is_type, had_type;
- skinf = malloc(sizeof(struct skiminfo));
- memset(skinf, 0, sizeof(struct skiminfo));
- pc_file = fopen(pcap_fname, "r");
- if (pc_file == NULL) {
- warn("fopen(%s)", pcap_fname);
- skinf->fatalerr++;
- return (skinf); /* fatal error */
- }
- skim_entryname[0] = '0';
- is_cont = NO_CONTINUE;
- is_type = CMNT_LINE;
- errno = 0;
- curline = fgets(buff, sizeof(buff), pc_file);
- while (curline != NULL) {
- skinf->lines++;
- /* Check for the expected newline char, and remove it */
- missing_nl = 0;
- lastchar = strchr(curline, '\n');
- if (lastchar != NULL)
- *lastchar = '\0';
- else {
- lastchar = strchr(curline, '\0');
- missing_nl = 1;
- }
- if (curline < lastchar)
- lastchar--;
- /*
- * Check for `\' (continuation-character) at end of line.
- * If there is none, then trim off spaces and check again.
- * This would be a bad line because it looks like it is
- * continued, but it will not be treated that way.
- */
- had_cont = is_cont;
- is_cont = NO_CONTINUE;
- if (*lastchar == '\\') {
- is_cont = WILL_CONTINUE;
- lastchar--;
- } else {
- while ((curline < lastchar) && !isgraphch(*lastchar))
- lastchar--;
- if (*lastchar == '\\')
- is_cont = BAD_CONTINUE;
- }
- had_type = is_type;
- is_type = CMNT_LINE;
- switch (*curline) {
- case '\0': /* treat zero-length line as comment */
- case '#':
- skinf->comments++;
- break;
- case ' ':
- case '\t':
- is_type = TAB_LINE;
- break;
- default:
- is_type = ENTRY_LINE;
- skinf->entries++;
- /* pick up the queue name, to use in warning messages */
- ch = curline;
- while ((ch <= lastchar) && (*ch != ':') && (*ch != '|'))
- ch++;
- ch--; /* last char of queue name */
- strcpy(skim_entryname, QENTRY_PREFIX);
- if ((ch - curline) > QENTRY_MAXLEN) {
- strncat(skim_entryname, curline, QENTRY_MAXLEN
- - 1);
- strcat(skim_entryname, "+");
- } else {
- strncat(skim_entryname, curline, (ch - curline
- + 1));
- }
- strlcat(skim_entryname, ")", sizeof(skim_entryname));
- break;
- }
- /*
- * Check to see if the previous line was a bad contination
- * line. The check is delayed until now so a warning message
- * is not printed when a "bad continuation" is on a comment
- * line, and it just "continues" into another comment line.
- */
- if (had_cont == BAD_CONTINUE) {
- if ((had_type != CMNT_LINE) || (is_type != CMNT_LINE) ||
- (verbosity > 1)) {
- skinf->warnings++;
- warnx("Warning: blanks after trailing '\\',"
- " at line %d%s", skinf->lines - 1,
- skim_entryname);
- }
- }
- /* If we are no longer in an entry, then forget the name */
- if ((had_cont != WILL_CONTINUE) && (is_type != ENTRY_LINE)) {
- skim_entryname[0] = '\0';
- }
- /*
- * Print out warning for missing newline, done down here
- * so we are sure to have the right entry-name for it.
- */
- if (missing_nl) {
- skinf->warnings++;
- warnx("Warning: No newline at end of line %d%s",
- skinf->lines, skim_entryname);
- }
- /*
- * Check for start-of-entry lines which do not include a
- * ":" character (to indicate the end of the name field).
- * This can cause standard printcap processing to ignore
- * ALL of the following lines.
- * XXXXX - May need to allow for the list-of-names to
- * continue on to the following line...
- */
- if (is_type == ENTRY_LINE) {
- endfield = strchr(curline, ':');
- if (endfield == NULL) {
- skinf->warnings++;
- warnx("Warning: No ':' to terminate name-field"
- " at line %d%s", skinf->lines,
- skim_entryname);
- }
- }
- /*
- * Now check for cases where this line is (or is-not) a
- * continuation of the previous line, and a person skimming
- * the file would assume it is not (or is) a continuation.
- */
- switch (had_cont) {
- case NO_CONTINUE:
- case BAD_CONTINUE:
- if (is_type == TAB_LINE) {
- skinf->warnings++;
- warnx("Warning: values-line after line with"
- " NO trailing '\\', at line %d%s",
- skinf->lines, skim_entryname);
- }
- break;
- case WILL_CONTINUE:
- if (is_type == ENTRY_LINE) {
- skinf->warnings++;
- warnx("Warning: new entry starts after line"
- " with trailing '\\', at line %d%s",
- skinf->lines, skim_entryname);
- }
- break;
- }
- /* get another line from printcap and repeat loop */
- curline = fgets(buff, sizeof(buff), pc_file);
- }
- if (errno != 0) {
- warn("fgets(%s)", pcap_fname);
- skinf->fatalerr++; /* fatal error */
- }
- if (skinf->warnings > 0)
- warnx("%4d warnings from skimming %s", skinf->warnings,
- pcap_fname);
- if (verbosity)
- warnx("%4d lines (%d comments), %d entries for %s",
- skinf->lines, skinf->comments, skinf->entries, pcap_fname);
- fclose(pc_file);
- return (skinf);
- }