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83 lines
3.0 KiB
83 lines
3.0 KiB
5 years ago
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diff -up libgcrypt-1.5.1/random/rndlinux.c.use-poll libgcrypt-1.5.1/random/rndlinux.c
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--- libgcrypt-1.5.1/random/rndlinux.c.use-poll 2013-03-20 15:33:26.504867356 +0100
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+++ libgcrypt-1.5.1/random/rndlinux.c 2013-03-20 15:37:24.999944048 +0100
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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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#include "types.h"
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#include "g10lib.h"
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#include "rand-internal.h"
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@@ -142,49 +143,37 @@ _gcry_rndlinux_gather_random (void (*add
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}
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/* Enter the read loop. */
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- delay = 0; /* Start with 0 seconds so that we do no block on the
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+ delay = 100; /* Start with 0 seconds so that we do no block on the
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first iteration and in turn call the progress function
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before blocking. To give the OS a better chance to
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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 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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+ if ( !(rc=poll(&pfd, 1, delay)) )
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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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- if ( !(rc=select(fd+1, &rfds, NULL, NULL, &tv)) )
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- {
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- if (!any_need_entropy || last_so_far != (want - length) )
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- {
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- last_so_far = want - length;
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- _gcry_random_progress ("need_entropy", 'X',
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- (int)last_so_far, (int)want);
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- any_need_entropy = 1;
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- }
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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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+ if (!any_need_entropy || last_so_far != (want - length) )
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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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+ last_so_far = want - length;
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+ _gcry_random_progress ("need_entropy", 'X',
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+ (int)last_so_far, (int)want);
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+ any_need_entropy = 1;
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+ }
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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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+ continue;
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}
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do
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