Wildan M
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
#include <sys/select.h>
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#include <string.h>
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#include <stdio.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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{
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int status;
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int pipe_fds[2];
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status = pipe(pipe_fds);
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ERROR_IF(pipe, status, == -1);
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int read_fd = pipe_fds[0];
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int write_fd = pipe_fds[1];
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fd_set read_fds;
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FD_ZERO(&read_fds);
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FD_SET(read_fd, &read_fds);
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struct timeval timeout = { .tv_sec = 0, .tv_usec = 10000 };
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int ready = select(read_fd + 1, &read_fds, NULL, NULL, &timeout);
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ERROR_IF(pselect, ready, == -1);
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UNEXP_IF(pselect, ready, != 0);
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char *c = "foo";
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ssize_t written = write(write_fd, c, 4);
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ERROR_IF(write, written, == -1);
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UNEXP_IF(write, written, != 4);
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FD_ZERO(&read_fds);
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FD_SET(read_fd, &read_fds);
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timeout.tv_sec = 5;
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timeout.tv_usec = 0;
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ready = select(read_fd + 1, &read_fds, NULL, NULL, &timeout);
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ERROR_IF(pselect, ready, == -1);
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UNEXP_IF(pselect, ready, != 1);
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int is_set = FD_ISSET(read_fd, &read_fds);
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UNEXP_IF(FD_ISSET, is_set, == 0);
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char x[4];
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ssize_t amount = read(read_fd, x, 4);
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ERROR_IF(read, amount, == -1);
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UNEXP_IF(read, amount, != 4);
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status = strcmp(c, x);
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printf("write %s\n", c);
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printf("read %s\n", x);
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UNEXP_IF(strcmp, status, != 0);
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close(read_fd);
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close(write_fd);
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return 0;
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} |