static void
frecverr(const char *msg, ...)
{
extern char fromb[];
va_list ap;
va_start(ap, msg);
rcleanup(0);
syslog(LOG_ERR, "%s", fromb);
vsyslog(LOG_ERR, msg, ap);
va_end(ap);
putchar('\1'); /* return error code */
exit(1);
}
/*
* Read printer jobs sent by lpd and copy them to the spooling directory.
* Return the number of jobs successfully transfered.
*/
static int
readjob()
{
register int size, nfiles;
register char *cp;
ack();
nfiles = 0;
for (;;) {
/*
* Read a command to tell us what to do
*/
cp = line;
do {
if ((size = read(1, cp, 1)) != 1) {
if (size < 0)
frecverr("%s: Lost connection",printer);
return(nfiles);
}
} while (*cp++ != '\n');
*--cp = '\0';
cp = line;
switch (*cp++) {
case '\1': /* cleanup because data sent was bad */
rcleanup(0);
continue;
case '\2': /* read cf file */
size = 0;
while (*cp >= '0' && *cp <= '9')
size = size * 10 + (*cp++ - '0');
if (*cp++ != ' ')
break;
/*
* host name has been authenticated, we use our
* view of the host name since we may be passed
* something different than what gethostbyaddr()
* returns
*/
strcpy(cp + 6, from);
strcpy(tfname, cp);
tfname[0] = 't';
if (!chksize(size)) {
(void) write(1, "\2", 1);
continue;
}
if (!readfile(tfname, size)) {
rcleanup(0);
continue;
}
if (link(tfname, cp) < 0)
frecverr("%s: %m", tfname);
(void) unlink(tfname);
tfname[0] = '\0';
nfiles++;
continue;
case '\3': /* read df file */
size = 0;
while (*cp >= '0' && *cp <= '9')
size = size * 10 + (*cp++ - '0');
if (*cp++ != ' ')
break;
if (!chksize(size)) {
(void) write(1, "\2", 1);
continue;
}
(void) strcpy(dfname, cp);
if (index(dfname, '/'))
frecverr("readjob: %s: illegal path name",
dfname);
(void) readfile(dfname, size);
continue;
}
frecverr("protocol screwup: %s", line);
}
}
/*
* Read printer jobs sent by lpd and copy them to the spooling directory.
* Return the number of jobs successfully transferred.
*/
static int
readjob(void)
{
int size, nfiles;
char *cp;
ack();
nfiles = 0;
for (;;) {
/*
* Read a command to tell us what to do
*/
cp = line;
do {
if ((size = read(STDOUT_FILENO, cp, 1)) != 1) {
if (size < 0)
frecverr("%s: Lost connection",
printer);
return(nfiles);
}
} while (*cp++ != '\n' && (cp - line + 1) < sizeof(line));
if (cp - line + 1 >= sizeof(line))
frecverr("readjob overflow");
*--cp = '\0';
cp = line;
switch (*cp++) {
case '\1': /* cleanup because data sent was bad */
rcleanup(0);
continue;
case '\2': /* read cf file */
size = 0;
while (*cp >= '0' && *cp <= '9')
size = size * 10 + (*cp++ - '0');
if (*cp++ != ' ')
break;
/*
* host name has been authenticated, we use our
* view of the host name since we may be passed
* something different than what gethostbyaddr()
* returns
*/
strlcpy(cp + 6, from, sizeof(line) + line - cp - 6);
if (strchr(cp, '/'))
frecverr("readjob: %s: illegal path name", cp);
strlcpy(tfname, cp, sizeof(tfname));
tfname[0] = 't';
if (!chksize(size)) {
(void)write(STDOUT_FILENO, "\2", 1);
continue;
}
/*
* XXX
* We blindly believe what the remote host puts
* for the path to the df file. In general this
* is OK since we don't allow paths with '/' in
* them. Still, it would be better to sanity
* check the cf file sent to us and make the
* df name match the cf name we used. That way
* we avoid any possible collisions.
*/
if (!readfile(tfname, size)) {
rcleanup(0);
continue;
}
if (link(tfname, cp) < 0)
frecverr("link %s %s: %m", tfname, cp);
(void)unlink(tfname);
tfname[0] = '\0';
nfiles++;
continue;
case '\3': /* read df file */
size = 0;
while (*cp >= '0' && *cp <= '9')
size = size * 10 + (*cp++ - '0');
if (*cp++ != ' ')
break;
if (strchr(cp, '/'))
frecverr("readjob: %s: illegal path name", cp);
if (!chksize(size)) {
(void)write(STDOUT_FILENO, "\2", 1);
continue;
}
(void)strlcpy(dfname, cp, sizeof(dfname));
(void)readfile(dfname, size);
continue;
}
frecverr("protocol screwup: %s", line);
}
}
