/*
- * "$Id: runloop.c 6649 2007-07-11 21:46:42Z mike $"
+ * "$Id: runloop.c 6834 2007-08-22 18:29:25Z mike $"
*
* Common run loop APIs for the Common UNIX Printing System (CUPS).
*
- * Copyright 2007 by Apple Inc.
+ * Copyright 2007-2008 by Apple Inc.
* Copyright 2006-2007 by Easy Software Products, all rights reserved.
*
* These coded instructions, statements, and computer programs are the
*/
#include "backend-private.h"
+#include <limits.h>
#ifdef __hpux
# include <sys/time.h>
#else
if (errno != ENOSPC && errno != ENXIO && errno != EAGAIN &&
errno != EINTR && errno != ENOTTY)
{
- fprintf(stderr, _("ERROR: Unable to write print data: %s\n"),
- strerror(errno));
+ _cupsLangPrintf(stderr, _("ERROR: Unable to write print data: %s\n"),
+ strerror(errno));
return (-1);
}
}
}
+/*
+ * 'backendNetworkSideCB()' - Handle common network side-channel commands.
+ */
+
+void
+backendNetworkSideCB(
+ int print_fd, /* I - Print file or -1 */
+ int device_fd, /* I - Device file or -1 */
+ int snmp_fd, /* I - SNMP socket */
+ http_addr_t *addr, /* I - Address of device */
+ int use_bc) /* I - Use back-channel data? */
+{
+ cups_sc_command_t command; /* Request command */
+ cups_sc_status_t status; /* Request/response status */
+ char data[2048]; /* Request/response data */
+ int datalen; /* Request/response data size */
+ const char *device_id; /* 1284DEVICEID env var */
+
+
+ datalen = sizeof(data);
+
+ if (cupsSideChannelRead(&command, &status, data, &datalen, 1.0))
+ {
+ _cupsLangPuts(stderr, _("WARNING: Failed to read side-channel request!\n"));
+ return;
+ }
+
+ switch (command)
+ {
+ case CUPS_SC_CMD_DRAIN_OUTPUT :
+ /*
+ * Our sockets disable the Nagle algorithm and data is sent immediately.
+ */
+
+ if (backendDrainOutput(print_fd, device_fd))
+ status = CUPS_SC_STATUS_IO_ERROR;
+ else
+ status = CUPS_SC_STATUS_OK;
+
+ datalen = 0;
+ break;
+
+ case CUPS_SC_CMD_GET_BIDI :
+ data[0] = use_bc;
+ datalen = 1;
+ break;
+
+ case CUPS_SC_CMD_GET_DEVICE_ID :
+ if ((device_id = getenv("1284DEVICEID")) != NULL)
+ {
+ strlcpy(data, device_id, sizeof(data));
+ datalen = (int)strlen(data);
+ break;
+ }
+
+ default :
+ status = CUPS_SC_STATUS_NOT_IMPLEMENTED;
+ datalen = 0;
+ break;
+ }
+
+ cupsSideChannelWrite(command, status, data, datalen, 1.0);
+}
+
+
/*
* 'backendRunLoop()' - Read and write print and back-channel data.
*/
ssize_t /* O - Total bytes on success, -1 on error */
backendRunLoop(
- int print_fd, /* I - Print file descriptor */
- int device_fd, /* I - Device file descriptor */
- int use_bc, /* I - Use back-channel? */
- void (*side_cb)(int, int, int)) /* I - Side-channel callback */
+ int print_fd, /* I - Print file descriptor */
+ int device_fd, /* I - Device file descriptor */
+ int snmp_fd, /* I - SNMP socket or -1 if none */
+ http_addr_t *addr, /* I - Address of device */
+ int use_bc, /* I - Use back-channel? */
+ void (*side_cb)(int, int, int, http_addr_t *, int))
+ /* I - Side-channel callback */
{
int nfds; /* Maximum file descriptor value + 1 */
fd_set input, /* Input set for reading */
char print_buffer[8192], /* Print data buffer */
*print_ptr, /* Pointer into print data buffer */
bc_buffer[1024]; /* Back-channel data buffer */
+ struct timeval timeout; /* Timeout for select() */
+ time_t curtime, /* Current time */
+ snmp_update = 0;
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
struct sigaction action; /* Actions for POSIX signals */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET */
fprintf(stderr,
- "DEBUG: backendRunLoop(print_fd=%d, device_fd=%d, use_bc=%d, "
- "side_cb=%p)\n",
- print_fd, device_fd, use_bc, side_cb);
+ "DEBUG: backendRunLoop(print_fd=%d, device_fd=%d, snmp_fd=%d, "
+ "addr=%p, use_bc=%d, side_cb=%p)\n",
+ print_fd, device_fd, snmp_fd, addr, use_bc, side_cb);
/*
* If we are printing data from a print driver on stdin, ignore SIGTERM
FD_SET(CUPS_SC_FD, &input);
FD_ZERO(&output);
- if (print_bytes || !use_bc)
+ if (print_bytes || (!use_bc && !side_cb))
FD_SET(device_fd, &output);
if (use_bc || side_cb)
{
- if (select(nfds, &input, &output, NULL, NULL) < 0)
+ timeout.tv_sec = 5;
+ timeout.tv_usec = 0;
+
+ if (select(nfds, &input, &output, NULL, &timeout) < 0)
{
/*
* Pause printing to clear any pending errors...
if (errno == ENXIO && offline != 1)
{
fputs("STATE: +offline-error\n", stderr);
- fputs(_("INFO: Printer is currently off-line.\n"), stderr);
+ _cupsLangPuts(stderr, _("INFO: Printer is currently offline.\n"));
offline = 1;
}
else if (errno == EINTR && total_bytes == 0)
*/
if (side_cb && FD_ISSET(CUPS_SC_FD, &input))
- (*side_cb)(print_fd, device_fd, use_bc);
+ (*side_cb)(print_fd, device_fd, snmp_fd, addr, use_bc);
/*
* Check if we have back-channel data ready...
if (paperout != 1)
{
fputs("STATE: +media-empty-error\n", stderr);
- fputs(_("ERROR: Out of paper!\n"), stderr);
+ _cupsLangPuts(stderr, _("ERROR: Out of paper!\n"));
paperout = 1;
}
}
if (offline != 1)
{
fputs("STATE: +offline-error\n", stderr);
- fputs(_("INFO: Printer is currently off-line.\n"), stderr);
+ _cupsLangPuts(stderr, _("INFO: Printer is currently off-line.\n"));
offline = 1;
}
}
if (offline)
{
fputs("STATE: -offline-error\n", stderr);
- fputs(_("INFO: Printer is now on-line.\n"), stderr);
+ _cupsLangPuts(stderr, _("INFO: Printer is now online.\n"));
offline = 0;
}
total_bytes += bytes;
}
}
+
+ /*
+ * Do SNMP updates periodically...
+ */
+
+ if (snmp_fd >= 0 && time(&curtime) >= snmp_update)
+ {
+ if (backendSNMPSupplies(snmp_fd, addr, NULL, NULL))
+ snmp_update = INT_MAX;
+ else
+ snmp_update = curtime + 5;
+ }
}
/*
/*
- * End of "$Id: runloop.c 6649 2007-07-11 21:46:42Z mike $".
+ * End of "$Id: runloop.c 6834 2007-08-22 18:29:25Z mike $".
*/
projects / thirdparty / cups.git / blobdiff