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diff -up libgcrypt-1.8.0/random/rndlinux.c.use-poll libgcrypt-1.8.0/random/rndlinux.c
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--- libgcrypt-1.8.0/random/rndlinux.c.use-poll 2017-06-24 13:34:29.000000000 +0200
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+++ libgcrypt-1.8.0/random/rndlinux.c 2017-08-15 15:37:37.604629377 +0200
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@@ -32,6 +32,7 @@
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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+#include <poll.h>
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#if defined(__linux__) && defined(HAVE_SYSCALL)
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# include <sys/syscall.h>
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#endif
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@@ -216,9 +217,8 @@ _gcry_rndlinux_gather_random (void (*add
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return with something we will actually use 100ms. */
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while (length)
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{
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- fd_set rfds;
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- struct timeval tv;
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int rc;
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+ struct pollfd pfd;
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/* If we have a modern Linux kernel and we want to read from the
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* the non-blocking /dev/urandom, we first try to use the new
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@@ -276,36 +276,25 @@ _gcry_rndlinux_gather_random (void (*add
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any_need_entropy = 1;
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}
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- /* If the system has no limit on the number of file descriptors
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- and we encounter an fd which is larger than the fd_set size,
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- we don't use the select at all. The select code is only used
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- to emit progress messages. A better solution would be to
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- fall back to poll() if available. */
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-#ifdef FD_SETSIZE
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- if (fd < FD_SETSIZE)
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-#endif
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+ pfd.fd = fd;
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+ pfd.events = POLLIN;
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+
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+ _gcry_pre_syscall ();
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+ rc = poll(&pfd, 1, delay);
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+ _gcry_post_syscall ();
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+ if (!rc)
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{
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- FD_ZERO(&rfds);
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- FD_SET(fd, &rfds);
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- tv.tv_sec = delay;
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- tv.tv_usec = delay? 0 : 100000;
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- _gcry_pre_syscall ();
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- rc = select (fd+1, &rfds, NULL, NULL, &tv;;
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- _gcry_post_syscall ();
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- if (!rc)
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- {
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- any_need_entropy = 1;
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- delay = 3; /* Use 3 seconds henceforth. */
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- continue;
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- }
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- else if( rc == -1 )
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- {
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- log_error ("select() error: %s\n", strerror(errno));
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- if (!delay)
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- delay = 1; /* Use 1 second if we encounter an error before
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- we have ever blocked. */
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- continue;
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- }
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+ any_need_entropy = 1;
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+ delay = 3000; /* Use 3 seconds henceforth. */
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+ continue;
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+ }
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+ else if( rc == -1 )
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+ {
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+ log_error ("poll() error: %s\n", strerror(errno));
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+ if (!delay)
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+ delay = 1000; /* Use 1 second if we encounter an error before
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+ we have ever blocked. */
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+ continue;
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}
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do
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