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diff -up cups-1.4.2/cups/sidechannel.c.sidechannel-intrs cups-1.4.2/cups/sidechannel.c
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--- cups-1.4.2/cups/sidechannel.c.sidechannel-intrs 2009-09-23 00:20:35.000000000 +0100
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+++ cups-1.4.2/cups/sidechannel.c 2009-12-08 11:08:15.297539377 +0000
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@@ -116,6 +116,7 @@ cupsSideChannelRead(
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char buffer[16388]; /* Message buffer */
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int bytes; /* Bytes read */
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int templen; /* Data length from message */
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+ int nfds; /* Number of file descriptors */
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#ifdef HAVE_POLL
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struct pollfd pfd; /* Poll structure for poll() */
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#else /* select() */
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@@ -143,39 +144,31 @@ cupsSideChannelRead(
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pfd.fd = CUPS_SC_FD;
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pfd.events = POLLIN;
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- if (timeout < 0.0)
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- {
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- if (poll(&pfd, 1, -1) < 1)
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- return (-1);
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- }
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- else if (poll(&pfd, 1, (long)(timeout * 1000)) < 1)
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- return (-1);
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+ while ((nfds = poll(&pfd, 1,
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+ timeout < 0.0 ? -1 : (long)(timeout * 1000))) < 0 &&
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+ (errno == EINTR || errno == EAGAIN))
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+ ;
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#else /* select() */
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FD_ZERO(&input_set);
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FD_SET(CUPS_SC_FD, &input_set);
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- if (timeout < 0.0)
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- {
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- if (select(CUPS_SC_FD + 1, &input_set, NULL, NULL, NULL) < 1)
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- {
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- DEBUG_printf(("1cupsSideChannelRead: Select error: %s", strerror(errno)));
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- return (-1);
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- }
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- }
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- else
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- {
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- stimeout.tv_sec = (int)timeout;
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- stimeout.tv_usec = (int)(timeout * 1000000) % 1000000;
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+ stimeout.tv_sec = (int)timeout;
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+ stimeout.tv_usec = (int)(timeout * 1000000) % 1000000;
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+
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+ while ((nfds = select(CUPS_SC_FD + 1, &input_set, NULL, NULL,
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+ timeout < 0.0 ? NULL : &stimeout)) < 0 &&
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+ (errno == EINTR || errno == EAGAIN))
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+ ;
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- if (select(CUPS_SC_FD + 1, &input_set, NULL, NULL, &stimeout) < 1)
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- {
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- DEBUG_puts("1cupsSideChannelRead: Select timeout");
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- return (-1);
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- }
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- }
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#endif /* HAVE_POLL */
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+ if (nfds < 1)
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+ {
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+ *status = nfds==0 ? CUPS_SC_STATUS_TIMEOUT : CUPS_SC_STATUS_IO_ERROR;
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+ return (-1);
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+ }
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+
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/*
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* Read a side-channel message for the format:
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*
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