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63 lines
1.6 KiB
63 lines
1.6 KiB
#include <assert.h> |
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#include <stdio.h> |
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <uv.h> |
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void on_read(uv_fs_t *req); |
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uv_fs_t open_req; |
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uv_fs_t read_req; |
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uv_fs_t write_req; |
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static char buffer[1024]; |
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static uv_buf_t iov; |
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void on_write(uv_fs_t *req) { |
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if (req->result < 0) { |
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fprintf(stderr, "Write error: %s\n", uv_strerror((int)req->result)); |
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} |
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else { |
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uv_fs_read(uv_default_loop(), &read_req, open_req.result, &iov, 1, -1, on_read); |
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} |
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} |
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void on_read(uv_fs_t *req) { |
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if (req->result < 0) { |
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fprintf(stderr, "Read error: %s\n", uv_strerror(req->result)); |
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} |
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else if (req->result == 0) { |
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uv_fs_t close_req; |
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// synchronous |
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uv_fs_close(uv_default_loop(), &close_req, open_req.result, NULL); |
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} |
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else if (req->result > 0) { |
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iov.len = req->result; |
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uv_fs_write(uv_default_loop(), &write_req, 1, &iov, 1, -1, on_write); |
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} |
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} |
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void on_open(uv_fs_t *req) { |
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// The request passed to the callback is the same as the one the call setup |
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// function was passed. |
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assert(req == &open_req); |
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if (req->result >= 0) { |
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iov = uv_buf_init(buffer, sizeof(buffer)); |
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uv_fs_read(uv_default_loop(), &read_req, req->result, |
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&iov, 1, -1, on_read); |
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} |
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else { |
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fprintf(stderr, "error opening file: %s\n", uv_strerror((int)req->result)); |
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} |
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} |
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int main(int argc, char **argv) { |
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uv_fs_open(uv_default_loop(), &open_req, argv[1], O_RDONLY, 0, on_open); |
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uv_run(uv_default_loop(), UV_RUN_DEFAULT); |
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uv_fs_req_cleanup(&open_req); |
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uv_fs_req_cleanup(&read_req); |
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uv_fs_req_cleanup(&write_req); |
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return 0; |
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}
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