Jeremy Soller
43 lines
917 B
C
43 lines
917 B
C
#include <fcntl.h>
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#include <stdio.h>
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#include <sys/select.h>
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#include <unistd.h>
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#include "test_helpers.h"
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int main(void) {
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int pipefd[2];
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if (pipe2(pipefd, O_NONBLOCK) < 0) {
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perror("pipe");
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return 1;
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}
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char c = 'c';
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if (write(pipefd[1], &c, sizeof(c)) < 0) {
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perror("write");
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return 1;
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}
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fd_set read;
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FD_ZERO(&read);
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FD_SET(pipefd[0], &read);
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printf("Is set before? %d\n", FD_ISSET(pipefd[0], &read));
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// This should actually test TCP streams and stuff, but for now I'm simply
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// testing whether it ever returns or not.
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int nfds = select(pipefd[0] + 1, &read, NULL, NULL, NULL);
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if (nfds < 0) {
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perror("select");
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return 1;
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}
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printf("Amount of things ready: %d\n", nfds);
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printf("Is set after? %d\n", FD_ISSET(pipefd[0], &read));
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close(pipefd[0]);
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close(pipefd[1]);
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return 0;
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}
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