40 lines
686 B
C
40 lines
686 B
C
#include <poll.h>
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#include <stdio.h>
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#include <unistd.h>
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#define TIMEOUT 5 /* poll timeout, in seconds */
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int main(void)
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{
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struct pollfd fds[2];
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int ret;
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/* watch stdin for input */
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fds[0].fd = STDIN_FILENO;
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fds[0].events = POLLIN;
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/* watch stdout for ability to write (almost always true) */
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fds[1].fd = STDOUT_FILENO;
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fds[1].events = POLLOUT;
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/* All set, block! */
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ret = poll(fds, 2, TIMEOUT * 1000);
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if (ret == -1) {
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perror("poll");
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return 1;
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}
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if (!ret) {
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printf("%d seconds elapsed.\n", TIMEOUT);
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return 0;
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}
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if (fds[0].revents & POLLIN)
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printf("stdin is readable\n");
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if (fds[1].revents & POLLOUT)
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printf("stdout is writable\n");
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return 0;
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}
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