Re-arrange how output filters (of=) are handled for queues going to
remote machines. Now they really are handled *exactly* the same as input filters (if=) for remote queues, except that they are started with a different set of parameters. This should fix a few subtle bugs in output-filter processing on such queues. It is a pretty significant re-arranging of sendfile(), moving some of it to a new execfilter() routine. PR: 36552 Reviewed by: no screams from freebsd-audit MFC after: 12 days
This commit is contained in:
gad
parent
1eec92e1b6
commit
e0f2899581
@ -130,6 +130,8 @@ static void alarmhandler(int _signo);
|
||||
static void banner(struct printer *_pp, char *_name1, char *_name2);
|
||||
static int dofork(const struct printer *_pp, int _action);
|
||||
static int dropit(int _c);
|
||||
static int execfilter(struct printer *_pp, char *_f_cmd, char **_f_av,
|
||||
int _infd, int _outfd);
|
||||
static void init(struct printer *_pp);
|
||||
static void openpr(const struct printer *_pp);
|
||||
static void opennet(const struct printer *_pp);
|
||||
@ -971,9 +973,9 @@ sendfile(struct printer *pp, int type, char *file, char format)
|
||||
{
|
||||
register int f, i, amt;
|
||||
struct stat stb;
|
||||
FILE *fp;
|
||||
char buf[BUFSIZ];
|
||||
int closedpr, resp, sizerr, statrc;
|
||||
char *av[15], *filtcmd;
|
||||
char buf[BUFSIZ], opt_c[4], opt_h[4], opt_n[4];
|
||||
int filtstat, narg, resp, sizerr, statrc;
|
||||
|
||||
statrc = lstat(file, &stb);
|
||||
if (statrc < 0) {
|
||||
@ -996,146 +998,104 @@ sendfile(struct printer *pp, int type, char *file, char format)
|
||||
(stb.st_dev != fdev || stb.st_ino != fino))
|
||||
return(ACCESS);
|
||||
|
||||
job_dfcnt++; /* increment datafile counter for this job */
|
||||
|
||||
/* everything seems OK, start it up */
|
||||
/* Everything seems OK for reading the file, now to send it */
|
||||
filtcmd = NULL;
|
||||
sizerr = 0;
|
||||
closedpr = 0;
|
||||
tfd = -1;
|
||||
if (type == '\3') {
|
||||
if (pp->filters[LPF_INPUT]) {
|
||||
/*
|
||||
* We're sending something with an ifilter. We have to
|
||||
* run the ifilter and store the output as a temporary
|
||||
* spool file (tfile...), because the protocol requires
|
||||
* us to send the file size before we start sending any
|
||||
* of the data.
|
||||
*/
|
||||
char *av[15];
|
||||
int n;
|
||||
int ifilter;
|
||||
union wait status; /* XXX */
|
||||
/*
|
||||
* Type == 3 means this is a datafile, not a control file.
|
||||
* Increment the counter of data-files in this job, and
|
||||
* then check for input or output filters (which are only
|
||||
* applied to datafiles, not control files).
|
||||
*/
|
||||
job_dfcnt++;
|
||||
|
||||
strcpy(tfile,TFILENAME);
|
||||
if ((tfd = mkstemp(tfile)) == -1) {
|
||||
syslog(LOG_ERR, "mkstemp: %m");
|
||||
return(ERROR);
|
||||
}
|
||||
if ((av[0] = strrchr(pp->filters[LPF_INPUT], '/')) == NULL)
|
||||
av[0] = pp->filters[LPF_INPUT];
|
||||
else
|
||||
av[0]++;
|
||||
/*
|
||||
* Note that here we are filtering datafiles, one at a time,
|
||||
* as they are sent to the remote machine. Here, the *only*
|
||||
* difference between an input filter (`if=') and an output
|
||||
* filter (`of=') is the argument list that the filter is
|
||||
* started up with. Here, the output filter is executed
|
||||
* for each individual file as it is sent. This is not the
|
||||
* same as local print queues, where the output filter is
|
||||
* started up once, and then all jobs are passed thru that
|
||||
* single invocation of the output filter.
|
||||
*
|
||||
* Also note that a queue for a remote-machine can have an
|
||||
* input filter or an output filter, but not both.
|
||||
*/
|
||||
if (pp->filters[LPF_INPUT]) {
|
||||
filtcmd = pp->filters[LPF_INPUT];
|
||||
av[0] = filtcmd;
|
||||
narg = 0;
|
||||
strcpy(opt_c, "-c");
|
||||
strcpy(opt_h, "-h");
|
||||
strcpy(opt_n, "-n");
|
||||
if (format == 'l')
|
||||
av[n=1] = "-c";
|
||||
else
|
||||
n = 0;
|
||||
av[++n] = width;
|
||||
av[++n] = length;
|
||||
av[++n] = indent;
|
||||
av[++n] = "-n";
|
||||
av[++n] = logname;
|
||||
av[++n] = "-h";
|
||||
av[++n] = origin_host;
|
||||
av[++n] = pp->acct_file;
|
||||
av[++n] = 0;
|
||||
if ((ifilter = dofork(pp, DORETURN)) == 0) { /* child */
|
||||
dup2(f, 0);
|
||||
dup2(tfd, 1);
|
||||
/* setup stderr for the filter (child process)
|
||||
* so it goes to our temporary errors file */
|
||||
n = open(tempstderr, O_WRONLY|O_TRUNC, 0664);
|
||||
if (n >= 0)
|
||||
dup2(n, 2);
|
||||
closelog();
|
||||
closeallfds(3);
|
||||
execv(pp->filters[LPF_INPUT], av);
|
||||
syslog(LOG_ERR, "cannot execv %s",
|
||||
pp->filters[LPF_INPUT]);
|
||||
exit(2);
|
||||
}
|
||||
(void) close(f);
|
||||
if (ifilter < 0)
|
||||
status.w_retcode = 100;
|
||||
else {
|
||||
while ((pid = wait((int *)&status)) > 0 &&
|
||||
pid != ifilter)
|
||||
;
|
||||
if (pid < 0) {
|
||||
status.w_retcode = 100;
|
||||
syslog(LOG_WARNING, "%s: after execv(%s), wait() returned: %m",
|
||||
pp->printer, pp->filters[LPF_INPUT]);
|
||||
}
|
||||
}
|
||||
/* Copy the filter's output to "lf" logfile */
|
||||
if ((fp = fopen(tempstderr, "r"))) {
|
||||
while (fgets(buf, sizeof(buf), fp))
|
||||
fputs(buf, stderr);
|
||||
fclose(fp);
|
||||
}
|
||||
/* process the return-code from the filter */
|
||||
switch (status.w_retcode) {
|
||||
case 0:
|
||||
break;
|
||||
case 1:
|
||||
unlink(tfile);
|
||||
return(REPRINT);
|
||||
case 2:
|
||||
unlink(tfile);
|
||||
return(ERROR);
|
||||
default:
|
||||
syslog(LOG_WARNING, "%s: filter '%c' exited"
|
||||
" (retcode=%d)",
|
||||
pp->printer, format, status.w_retcode);
|
||||
unlink(tfile);
|
||||
return(FILTERERR);
|
||||
}
|
||||
statrc = fstat(tfd, &stb); /* to find size of tfile */
|
||||
if (statrc < 0) {
|
||||
syslog(LOG_ERR, "%s: error processing 'if', fstat(%s): %m",
|
||||
pp->printer, tfile);
|
||||
return(ERROR);
|
||||
}
|
||||
f = tfd;
|
||||
lseek(f,0,SEEK_SET);
|
||||
} else if (ofilter) {
|
||||
/*
|
||||
* We're sending something with an ofilter, we have to
|
||||
* store the output as a temporary file (tfile)... the
|
||||
* protocol requires us to send the file size
|
||||
*/
|
||||
int i;
|
||||
for (i = 0; i < stb.st_size; i += BUFSIZ) {
|
||||
amt = BUFSIZ;
|
||||
if (i + amt > stb.st_size)
|
||||
amt = stb.st_size - i;
|
||||
if (sizerr == 0 && read(f, buf, amt) != amt) {
|
||||
sizerr = 1;
|
||||
break;
|
||||
}
|
||||
if (write(ofd, buf, amt) != amt) {
|
||||
(void) close(f);
|
||||
return(REPRINT);
|
||||
}
|
||||
}
|
||||
close(ofd);
|
||||
close(f);
|
||||
while ((i = wait(NULL)) > 0 && i != ofilter)
|
||||
;
|
||||
if (i < 0)
|
||||
syslog(LOG_WARNING, "%s: after closing 'of', wait() returned: %m",
|
||||
pp->printer);
|
||||
ofilter = 0;
|
||||
statrc = fstat(tfd, &stb); /* to find size of tfile */
|
||||
if (statrc < 0) {
|
||||
syslog(LOG_ERR, "%s: error processing 'of', fstat(%s): %m",
|
||||
pp->printer, tfile);
|
||||
openpr(pp);
|
||||
return(ERROR);
|
||||
}
|
||||
f = tfd;
|
||||
lseek(f,0,SEEK_SET);
|
||||
closedpr = 1;
|
||||
av[++narg] = opt_c;
|
||||
av[++narg] = width;
|
||||
av[++narg] = length;
|
||||
av[++narg] = indent;
|
||||
av[++narg] = opt_n;
|
||||
av[++narg] = logname;
|
||||
av[++narg] = opt_h;
|
||||
av[++narg] = origin_host;
|
||||
av[++narg] = pp->acct_file;
|
||||
av[++narg] = NULL;
|
||||
} else if (pp->filters[LPF_OUTPUT]) {
|
||||
filtcmd = pp->filters[LPF_OUTPUT];
|
||||
av[0] = filtcmd;
|
||||
narg = 0;
|
||||
av[++narg] = width;
|
||||
av[++narg] = length;
|
||||
av[++narg] = NULL;
|
||||
}
|
||||
}
|
||||
if (filtcmd) {
|
||||
/*
|
||||
* If there is an input or output filter, we have to run
|
||||
* the datafile thru that filter and store the result as
|
||||
* a temporary spool file, because the protocol requires
|
||||
* that we send the remote host the file-size before we
|
||||
* start to send any of the data.
|
||||
*/
|
||||
strcpy(tfile, TFILENAME);
|
||||
tfd = mkstemp(tfile);
|
||||
if (tfd == -1) {
|
||||
syslog(LOG_ERR, "%s: mkstemp(%s): %m", pp->printer,
|
||||
TFILENAME);
|
||||
return (ERROR);
|
||||
}
|
||||
filtstat = execfilter(pp, filtcmd, av, f, tfd);
|
||||
|
||||
/* process the return-code from the filter */
|
||||
switch (filtstat) {
|
||||
case 0:
|
||||
break;
|
||||
case 1:
|
||||
unlink(tfile);
|
||||
return (REPRINT);
|
||||
case 2:
|
||||
unlink(tfile);
|
||||
return (ERROR);
|
||||
default:
|
||||
syslog(LOG_WARNING,
|
||||
"%s: filter '%c' exited (retcode=%d)",
|
||||
pp->printer, format, filtstat);
|
||||
unlink(tfile);
|
||||
return (FILTERERR);
|
||||
}
|
||||
statrc = fstat(tfd, &stb); /* to find size of tfile */
|
||||
if (statrc < 0) {
|
||||
syslog(LOG_ERR,
|
||||
"%s: error processing 'if', fstat(%s): %m",
|
||||
pp->printer, tfile);
|
||||
return (ERROR);
|
||||
}
|
||||
f = tfd;
|
||||
lseek(f,0,SEEK_SET);
|
||||
}
|
||||
|
||||
(void) sprintf(buf, "%c%qd %s\n", type, stb.st_size, file);
|
||||
amt = strlen(buf);
|
||||
@ -1146,8 +1106,6 @@ sendfile(struct printer *pp, int type, char *file, char format)
|
||||
if (tfd != -1 && type == '\3') {
|
||||
tfd = -1;
|
||||
unlink(tfile);
|
||||
if (closedpr)
|
||||
openpr(pp);
|
||||
}
|
||||
return(REPRINT);
|
||||
} else if (resp == '\0')
|
||||
@ -1175,8 +1133,6 @@ sendfile(struct printer *pp, int type, char *file, char format)
|
||||
if (tfd != -1 && type == '\3') {
|
||||
tfd = -1;
|
||||
unlink(tfile);
|
||||
if (closedpr)
|
||||
openpr(pp);
|
||||
}
|
||||
return(REPRINT);
|
||||
}
|
||||
@ -1191,23 +1147,100 @@ sendfile(struct printer *pp, int type, char *file, char format)
|
||||
syslog(LOG_INFO, "%s: %s: changed size", pp->printer, file);
|
||||
/* tell recvjob to ignore this file */
|
||||
(void) write(pfd, "\1", 1);
|
||||
if (closedpr)
|
||||
openpr(pp);
|
||||
return(ERROR);
|
||||
}
|
||||
if (write(pfd, "", 1) != 1 || response(pp)) {
|
||||
if (closedpr)
|
||||
openpr(pp);
|
||||
return(REPRINT);
|
||||
}
|
||||
if (closedpr)
|
||||
openpr(pp);
|
||||
if (type == '\3')
|
||||
trstat_write(pp, TR_SENDING, stb.st_size, logname,
|
||||
pp->remote_host, origin_host);
|
||||
return(OK);
|
||||
}
|
||||
|
||||
/*
|
||||
* This routine is called to execute one of the filters as was
|
||||
* specified in a printcap entry.
|
||||
*/
|
||||
static int
|
||||
execfilter(struct printer *pp, char *f_cmd, char *f_av[], int infd, int outfd)
|
||||
{
|
||||
int errfd, fpid, wpid;
|
||||
FILE *errfp;
|
||||
union wait status; /* XXX */
|
||||
char buf[BUFSIZ], *slash;
|
||||
|
||||
fpid = dofork(pp, DORETURN);
|
||||
if (fpid != 0) {
|
||||
/*
|
||||
* This is the parent process, which just waits for the child
|
||||
* to complete and then returns the result. Note that it is
|
||||
* the child process which reads the input stream.
|
||||
*/
|
||||
(void) close(infd);
|
||||
if (fpid < 0)
|
||||
status.w_retcode = 100;
|
||||
else {
|
||||
while ((wpid = wait((int *)&status)) > 0 &&
|
||||
wpid != fpid)
|
||||
;
|
||||
if (wpid < 0) {
|
||||
status.w_retcode = 100;
|
||||
syslog(LOG_WARNING,
|
||||
"%s: after execv(%s), wait() returned: %m",
|
||||
pp->printer, f_cmd);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Copy everything the filter wrote to stderr from our
|
||||
* temporary errors file to the "lf=" logfile.
|
||||
*/
|
||||
errfp = fopen(tempstderr, "r");
|
||||
if (errfp) {
|
||||
while (fgets(buf, sizeof(buf), errfp))
|
||||
fputs(buf, stderr);
|
||||
fclose(errfp);
|
||||
}
|
||||
|
||||
return (status.w_retcode);
|
||||
}
|
||||
|
||||
/*
|
||||
* This is the child process, which is the one that executes the
|
||||
* given filter.
|
||||
*/
|
||||
/*
|
||||
* If the first parameter has any slashes in it, then change it
|
||||
* to point to the first character after the last slash.
|
||||
*/
|
||||
slash = strrchr(f_av[0], '/');
|
||||
if (slash != NULL)
|
||||
f_av[0] = slash + 1;
|
||||
/*
|
||||
* XXX - in the future, this should setup an explicit list of
|
||||
* environment variables and use execve()!
|
||||
*/
|
||||
|
||||
/*
|
||||
* Setup stdin, stdout, and stderr as we want them when the filter
|
||||
* is running. Stderr is setup so it points to a temporary errors
|
||||
* file, and the parent process will copy that temporary file to
|
||||
* the real logfile after the filter completes.
|
||||
*/
|
||||
dup2(infd, 0);
|
||||
dup2(outfd, 1);
|
||||
errfd = open(tempstderr, O_WRONLY|O_TRUNC, 0664);
|
||||
if (errfd >= 0)
|
||||
dup2(errfd, 2);
|
||||
closelog();
|
||||
closeallfds(3);
|
||||
execv(f_cmd, f_av);
|
||||
syslog(LOG_ERR, "%s: cannot execv %s", pp->printer, f_cmd);
|
||||
exit(2);
|
||||
/* NOTREACHED */
|
||||
}
|
||||
|
||||
/*
|
||||
* Check to make sure there have been no errors and that both programs
|
||||
* are in sync with eachother.
|
||||
@ -1559,6 +1592,17 @@ openpr(const struct printer *pp)
|
||||
|
||||
if (pp->remote) {
|
||||
openrem(pp);
|
||||
/*
|
||||
* Lpd does support the setting of 'of=' filters for
|
||||
* jobs going to remote machines, but that does not
|
||||
* have the same meaning as 'of=' does when handling
|
||||
* local print queues. For remote machines, all 'of='
|
||||
* filter processing is handled in sendfile(), and that
|
||||
* does not use these global "output filter" variables.
|
||||
*/
|
||||
ofd = -1;
|
||||
ofilter = 0;
|
||||
return;
|
||||
} else if (*pp->lp) {
|
||||
if ((cp = strchr(pp->lp, '@')) != NULL)
|
||||
opennet(pp);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user