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|
--- p910nd-0.7/p910nd.c.orig 2005-09-29 11:31:02.442914400 +0200
+++ p910nd-0.7/p910nd.c 2005-09-29 11:31:49.236800648 +0200
@@ -73,8 +73,7 @@
#else
#define LOCKFILE "/var/lock/subsys/p910%cd"
#endif
-#define PRINTERFILE "/dev/lp%c"
-#define LOGOPTS LOG_ERR
+#define PRINTERFILE "/dev/printers/%c"
static char *progname;
static char version[] = "p910nd Version 0.7";
@@ -93,9 +92,9 @@
fprintf(stdout, "%s \n", version);
}
-FILE *open_printer(int lpnumber)
+int open_printer(int lpnumber)
{
- FILE *f;
+ int lp;
char lpname[sizeof(PRINTERFILE)];
#ifdef TESTING
@@ -105,12 +104,16 @@
#endif
if (device == 0)
device = lpname;
- if ((f = fopen(device, bidir ? "w+" : "w")) == NULL)
+ if ((lp = open(device, bidir ? O_RDWR : O_WRONLY)) == -1)
{
- syslog(LOGOPTS, "%s: %m\n", device);
- exit(1);
+ syslog(LOG_ERR, "%s: %m\n", device);
+
+ /* fallback to /dev/null if device is not available
+ * otherwise windows spooler will screw up
+ */
+ lp = open("/dev/null", bidir ? O_RDWR : O_WRONLY);
}
- return (f);
+ return (lp);
}
int get_lock(int lpnumber)
@@ -121,7 +124,7 @@
(void)snprintf(lockname, sizeof(lockname), LOCKFILE, lpnumber);
if ((lockfd = open(lockname, O_CREAT|O_RDWR)) < 0)
{
- syslog(LOGOPTS, "%s: %m\n", lockname);
+ syslog(LOG_ERR, "%s: %m\n", lockname);
return (0);
}
memset(&lplock, 0, sizeof(lplock));
@@ -129,7 +132,7 @@
lplock.l_pid = getpid();
if (fcntl(lockfd, F_SETLKW, &lplock) < 0)
{
- syslog(LOGOPTS, "%s: %m\n", lockname);
+ syslog(LOG_ERR, "%s: %m\n", lockname);
return (0);
}
return (1);
@@ -141,24 +144,36 @@
(void)close(lockfd);
}
+ssize_t safe_write(int fd, char *buf, size_t count)
+{
+ size_t offset = 0;
+
+ while (offset < count) {
+ ssize_t n = write(fd, buf + offset, count - offset);
+
+ if (n < 0 && errno != EINTR)
+ return n;
+
+ if (n > 0)
+ offset += n;
+ }
+
+ return offset;
+}
+
/* Copy network socket to FILE f until EOS */
-int copy_stream(int fd, FILE *f)
+int copy_stream(int fd, int lp)
{
- int nread;
+ int nread, rcvd = 0, sent = 0;
char buffer[8192];
if (bidir) {
- FILE *nf;
-
- if ((nf = fdopen(fd, "w")) == NULL) {
- syslog(LOGOPTS, "fdopen: %m\n");
- }
for (;;) {
fd_set readfds;
int result;
- int maxfd = fileno(f) > fd ? fileno(f) : fd;
+ int maxfd = lp > fd ? lp : fd;
FD_ZERO(&readfds);
- FD_SET(fileno(f), &readfds);
+ FD_SET(lp, &readfds);
FD_SET(fd, &readfds);
result = select(maxfd + 1, &readfds, 0, 0, 0);
if (result < 0)
@@ -169,43 +184,54 @@
nread = read(fd, buffer, sizeof(buffer));
if (nread <= 0)
break;
- (void)fwrite(buffer, sizeof(char), nread, f);
+ if (safe_write(lp, buffer, nread) < 0) {
+ syslog(LOG_ERR, "write: %m\n");
+ break;
+ }
+ rcvd += nread;
}
- if (FD_ISSET(fileno(f), &readfds)) {
- nread = read(fileno(f), buffer, sizeof(buffer));
- if (nread > 0 && nf != NULL) {
- (void)fwrite(buffer, sizeof(char), nread, nf);
- (void)fflush(nf);
+ if (FD_ISSET(lp, &readfds)) {
+ nread = read(lp, buffer, sizeof(buffer));
+ if (nread > 0) {
+ safe_write(fd, buffer, nread);
+ sent += nread;
}
}
}
- (void)fflush(f);
- (void)fclose(nf);
+ syslog(LOG_NOTICE, "Finished job: %d bytes received, %d bytes sent\n",
+ rcvd, sent);
return (0);
} else {
- while ((nread = read(fd, buffer, sizeof(buffer))) > 0)
- (void)fwrite(buffer, sizeof(char), nread, f);
- (void)fflush(f);
+ while ((nread = read(fd, buffer, sizeof(buffer))) > 0) {
+ if (safe_write(lp, buffer, nread) < 0) {
+ syslog(LOG_ERR, "write: %m\n");
+ break;
+ }
+ rcvd += nread;
+ }
+ syslog(LOG_NOTICE, "Finished job: %d bytes received\n", rcvd);
return (nread);
}
}
void one_job(int lpnumber)
{
- FILE *f;
+ int lp;
struct sockaddr_in client;
socklen_t clientlen = sizeof(client);
if (getpeername(0, (struct sockaddr*) &client, &clientlen) >= 0)
- syslog(LOGOPTS, "Connection from %s port %hu\n",
+ syslog(LOG_NOTICE, "Connection from %s port %hu\n",
inet_ntoa(client.sin_addr),
ntohs(client.sin_port));
if (get_lock(lpnumber) == 0)
return;
- f = open_printer(lpnumber);
- if (copy_stream(0, f) < 0)
- syslog(LOGOPTS, "copy_stream: %m\n");
- fclose(f);
+ if ((lp = open_printer(lpnumber)) != -1)
+ {
+ if (copy_stream(0, lp) < 0)
+ syslog(LOG_ERR, "copy_stream: %m\n");
+ close(lp);
+ }
free_lock();
}
@@ -215,7 +241,7 @@
#ifdef USE_GETPROTOBYNAME
struct protoent *proto;
#endif
- int netfd, fd, one = 1;
+ int netfd, fd, lp, one = 1;
socklen_t clientlen;
struct sockaddr_in netaddr, client;
char pidfilename[sizeof(PIDFILE)];
@@ -225,7 +251,7 @@
switch (fork())
{
case -1:
- syslog(LOGOPTS, "fork: %m\n");
+ syslog(LOG_ERR, "fork: %m\n");
exit (1);
case 0: /* child */
break;
@@ -236,14 +262,14 @@
resourcelimit.rlim_max = 0;
if (getrlimit(RLIMIT_NOFILE, &resourcelimit) < 0)
{
- syslog(LOGOPTS, "getrlimit: %m\n");
+ syslog(LOG_ERR, "getrlimit: %m\n");
exit(1);
}
for (fd = 0; fd < resourcelimit.rlim_max; ++fd)
(void)close(fd);
if (setsid() < 0)
{
- syslog(LOGOPTS, "setsid: %m\n");
+ syslog(LOG_ERR, "setsid: %m\n");
exit(1);
}
(void)chdir("/");
@@ -254,7 +280,7 @@
(void)snprintf(pidfilename, sizeof(pidfilename), PIDFILE, lpnumber);
if ((f = fopen(pidfilename, "w")) == NULL)
{
- syslog(LOGOPTS, "%s: %m\n", pidfilename);
+ syslog(LOG_ERR, "%s: %m\n", pidfilename);
exit(1);
}
(void)fprintf(f, "%d\n", getpid());
@@ -262,11 +288,10 @@
if (get_lock(lpnumber) == 0)
exit(1);
#endif
- f = open_printer(lpnumber);
#ifdef USE_GETPROTOBYNAME
if ((proto = getprotobyname("tcp")) == NULL)
{
- syslog(LOGOPTS, "Cannot find protocol for TCP!\n");
+ syslog(LOG_ERR, "Cannot find protocol for TCP!\n");
exit(1);
}
if ((netfd = socket(AF_INET, SOCK_STREAM, proto->p_proto)) < 0)
@@ -274,12 +299,12 @@
if ((netfd = socket(AF_INET, SOCK_STREAM, IPPROTO_IP)) < 0)
#endif
{
- syslog(LOGOPTS, "socket: %m\n");
+ syslog(LOG_ERR, "socket: %m\n");
exit(1);
}
if (setsockopt(netfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
{
- syslog(LOGOPTS, "setsocketopt: %m\n");
+ syslog(LOG_ERR, "setsocketopt: %m\n");
exit(1);
}
netaddr.sin_port = htons(BASEPORT + lpnumber - '0');
@@ -287,12 +312,12 @@
memset(netaddr.sin_zero, 0, sizeof(netaddr.sin_zero));
if (bind(netfd, (struct sockaddr*) &netaddr, sizeof(netaddr)) < 0)
{
- syslog(LOGOPTS, "bind: %m\n");
+ syslog(LOG_ERR, "bind: %m\n");
exit(1);
}
if (listen(netfd, 5) < 0)
{
- syslog(LOGOPTS, "listen: %m\n");
+ syslog(LOG_ERR, "listen: %m\n");
exit(1);
}
clientlen = sizeof(client);
@@ -302,22 +327,26 @@
#ifdef USE_LIBWRAP
if (hosts_ctl("p910nd", STRING_UNKNOWN,
inet_ntoa(client.sin_addr), STRING_UNKNOWN) == 0) {
- syslog(LOGOPTS, "Connection from %s port %hd rejected\n",
+ syslog(LOG_ERR, "Connection from %s port %hu rejected\n",
inet_ntoa(client.sin_addr),
ntohs(client.sin_port));
close(fd);
continue;
}
#endif
- syslog(LOGOPTS, "Connection from %s port %hd accepted\n",
+ syslog(LOG_NOTICE, "Connection from %s port %hu accepted\n",
inet_ntoa(client.sin_addr),
ntohs(client.sin_port));
/*write(fd, "Printing", 8);*/
- if (copy_stream(fd, f) < 0)
- syslog(LOGOPTS, "copy_stream: %m\n");
+ if ((lp = open_printer(lpnumber)) != -1)
+ {
+ if (copy_stream(fd, lp) < 0)
+ syslog(LOG_ERR, "copy_stream: %m\n");
+ close(lp);
+ }
(void)close(fd);
}
- syslog(LOGOPTS, "accept: %m\n");
+ syslog(LOG_ERR, "accept: %m\n");
free_lock();
exit(1);
}
@@ -338,7 +367,7 @@
if (getsockname(0, (struct sockaddr*) &bind_addr, &ba_len) == 0)
return (0); /* under inetd */
if (errno != ENOTSOCK) /* strange... */
- syslog(LOGOPTS, "getsockname: %m\n");
+ syslog(LOG_ERR, "getsockname: %m\n");
return (1);
}
|
