FreeBSD-5.3/usr.sbin/lpr/chkprintcap/chkprintcap.c
/*
* Copyright 1997 Massachusetts Institute of Technology
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that both the above copyright notice and this
* permission notice appear in all copies, that both the above
* copyright notice and this permission notice appear in all
* supporting documentation, and that the name of M.I.T. not be used
* in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. M.I.T. makes
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
* SHALL M.I.T. 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.
*/
static const char copyright[] =
"Copyright (C) 1997, Massachusetts Institute of Technology\r\n";
#include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */
__FBSDID("$FreeBSD: src/usr.sbin/lpr/chkprintcap/chkprintcap.c,v 1.8 2003/07/15 08:48:30 gad Exp $");
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/stat.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 "pathnames.h"
#include "skimprintcap.h"
static void check_spool_dirs(void);
static int interpret_error(const struct printer *pp, int error);
static void make_spool_dir(const struct printer *pp);
static void note_spool_dir(const struct printer *pp, const struct stat *st);
static void usage(void) __dead2;
static int problems; /* number of problems encountered */
/*
* chkprintcap - check the printcap file for syntactic and semantic errors
* Returns the number of problems found.
*/
int
main(int argc, char **argv)
{
struct skiminfo *skres;
char *pcap_fname;
int c, error, makedirs, more, queuecnt, verbosity;
struct printer myprinter, *pp;
makedirs = 0;
queuecnt = 0;
verbosity = 0;
pcap_fname = NULL;
pp = &myprinter;
while ((c = getopt(argc, argv, "df:v")) != -1) {
switch (c) {
case 'd':
makedirs = 1;
break;
case 'f':
pcap_fname = strdup(optarg);
setprintcap(pcap_fname);
break;
case 'v':
verbosity++;
break;
default:
usage();
}
}
if (optind != argc)
usage();
if (pcap_fname == NULL)
pcap_fname = strdup(_PATH_PRINTCAP);
/*
* Skim through the printcap file looking for simple user-mistakes
* which will produce the wrong result for the user, but which may
* be pretty hard for the user to notice. Such user-mistakes will
* only generate warning messages. The (fatal-) problem count will
* only be incremented if there is a system problem trying to read
* the printcap file.
*/
skres = skim_printcap(pcap_fname, verbosity);
if (skres->fatalerr)
return (skres->fatalerr);
/*
* Now use the standard capability-db routines to check the values
* in each of the queues defined in the printcap file.
*/
more = firstprinter(pp, &error);
if (interpret_error(pp, error) && more)
goto next;
while (more) {
struct stat stab;
queuecnt++;
errno = 0;
if (stat(pp->spool_dir, &stab) < 0) {
if (errno == ENOENT && makedirs) {
make_spool_dir(pp);
} else {
problems++;
warn("%s: %s", pp->printer, pp->spool_dir);
}
} else {
note_spool_dir(pp, &stab);
}
/* Make other queue-specific validity checks here... */
next:
more = nextprinter(pp, &error);
if (interpret_error(pp, error) && more)
goto next;
}
check_spool_dirs();
if (queuecnt != skres->entries) {
warnx("WARNING: found %d entries when skimming %s,",
skres->entries, pcap_fname);
warnx("WARNING: but only found %d queues to process!",
queuecnt);
}
return (problems);
}
/*
* Interpret the error code. Returns 1 if we should skip to the next
* record (as this record is unlikely to make sense). If the problem
* is very severe, exit. Otherwise, return zero.
*/
static int
interpret_error(const struct printer *pp, int error)
{
switch(error) {
case PCAPERR_OSERR:
err(++problems, "reading printer database");
case PCAPERR_TCLOOP:
++problems;
warnx("%s: loop detected in tc= expansion", pp->printer);
return 1;
case PCAPERR_TCOPEN:
warnx("%s: unresolved tc= expansion", pp->printer);
return 1;
case PCAPERR_SUCCESS:
break;
default:
errx(++problems, "unknown printcap library error %d", error);
}
return 0;
}
/*
* Keep the list of spool directories. Note that we don't whine
* until all spool directories are noted, so that all of the more serious
* problems are noted first. We keep the list sorted by st_dev and
* st_ino, so that the problem spool directories can be noted in
* a single loop.
*/
struct dirlist {
LIST_ENTRY(dirlist) link;
struct stat stab;
char *path;
char *printer;
};
static LIST_HEAD(, dirlist) dirlist;
static int
lessp(const struct dirlist *a, const struct dirlist *b)
{
if (a->stab.st_dev == b->stab.st_dev)
return a->stab.st_ino < b->stab.st_ino;
return a->stab.st_dev < b->stab.st_dev;
}
static int
equal(const struct dirlist *a, const struct dirlist *b)
{
return ((a->stab.st_dev == b->stab.st_dev)
&& (a->stab.st_ino == b->stab.st_ino));
}
static void
note_spool_dir(const struct printer *pp, const struct stat *st)
{
struct dirlist *dp, *dp2, *last;
dp = malloc(sizeof *dp);
if (dp == 0)
err(++problems, "malloc(%lu)", (u_long)sizeof *dp);
dp->stab = *st;
dp->printer = strdup(pp->printer);
if (dp->printer == 0)
err(++problems, "malloc(%lu)", strlen(pp->printer) + 1UL);
dp->path = strdup(pp->spool_dir);
if (dp->path == 0)
err(++problems, "malloc(%lu)", strlen(pp->spool_dir) + 1UL);
last = 0;
LIST_FOREACH(dp2, &dirlist, link) {
if(!lessp(dp, dp2))
break;
last = dp2;
}
if (last) {
LIST_INSERT_AFTER(last, dp, link);
} else {
LIST_INSERT_HEAD(&dirlist, dp, link);
}
}
static void
check_spool_dirs(void)
{
struct dirlist *dp, *dp2;
for (dp = LIST_FIRST(&dirlist); dp; dp = dp2) {
dp2 = LIST_NEXT(dp, link);
if (dp2 != 0 && equal(dp, dp2)) {
++problems;
if (strcmp(dp->path, dp2->path) == 0) {
warnx("%s and %s share the same spool, %s",
dp->printer, dp2->printer, dp->path);
} else {
warnx("%s (%s) and %s (%s) are the same "
"directory", dp->path, dp->printer,
dp2->path, dp2->printer);
}
continue;
}
/* Should probably check owners and modes here. */
}
}
#ifndef SPOOL_DIR_MODE
#define SPOOL_DIR_MODE (S_IRUSR | S_IWUSR | S_IXUSR \
| S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH)
#endif
static void
make_spool_dir(const struct printer *pp)
{
char *sd = pp->spool_dir;
struct group *gr;
struct stat stab;
if (mkdir(sd, S_IRUSR | S_IXUSR) < 0) {
problems++;
warn("%s: mkdir %s", pp->printer, sd);
return;
}
gr = getgrnam("daemon");
if (gr == 0)
errx(++problems, "cannot locate daemon group");
if (chown(sd, pp->daemon_user, gr->gr_gid) < 0) {
++problems;
warn("%s: cannot change ownership to %ld:%ld", sd,
(long)pp->daemon_user, (long)gr->gr_gid);
return;
}
if (chmod(sd, SPOOL_DIR_MODE) < 0) {
++problems;
warn("%s: cannot change mode to %lo", sd, (long)SPOOL_DIR_MODE);
return;
}
if (stat(sd, &stab) < 0)
err(++problems, "stat: %s", sd);
note_spool_dir(pp, &stab);
}
static void
usage(void)
{
fprintf(stderr, "usage:\n\tchkprintcap [-dv] [-f printcapfile]\n");
exit(1);
}