FreeBSD-5.3/usr.sbin/lpr/chkprintcap/skimprintcap.c
/*
* ------+---------+---------+---------+---------+---------+---------+---------*
* 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: src/usr.sbin/lpr/chkprintcap/skimprintcap.c,v 1.3 2003/07/15 08:48:30 gad Exp $");
#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);
}