80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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#include <stdlib.h>
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#include <uv.h>
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typedef struct {
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uv_write_t req;
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uv_buf_t buf;
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} write_req_t;
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uv_loop_t *loop;
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uv_pipe_t stdin_pipe;
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uv_pipe_t stdout_pipe;
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uv_pipe_t file_pipe;
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void alloc_buffer(uv_handle_t *handle, size_t suggested_size, uv_buf_t *buf) {
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*buf = uv_buf_init((char*) malloc(suggested_size), suggested_size);
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}
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void free_write_req(uv_write_t *req) {
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write_req_t *wr = (write_req_t*) req;
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free(wr->buf.base);
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free(wr);
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}
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void on_stdout_write(uv_write_t *req, int status) {
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free_write_req(req);
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}
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void on_file_write(uv_write_t *req, int status) {
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free_write_req(req);
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}
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void write_data(uv_stream_t *dest, size_t size, uv_buf_t buf, uv_write_cb cb) {
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write_req_t *req = (write_req_t*) malloc(sizeof(write_req_t));
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req->buf = uv_buf_init((char*) malloc(size), size);
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memcpy(req->buf.base, buf.base, size);
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uv_write((uv_write_t*) req, (uv_stream_t*)dest, &req->buf, 1, cb);
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}
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void read_stdin(uv_stream_t *stream, ssize_t nread, const uv_buf_t *buf) {
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if (nread < 0){
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if (nread == UV_EOF){
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// end of file
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uv_close((uv_handle_t *)&stdin_pipe, NULL);
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uv_close((uv_handle_t *)&stdout_pipe, NULL);
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uv_close((uv_handle_t *)&file_pipe, NULL);
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}
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} else if (nread > 0) {
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write_data((uv_stream_t *)&stdout_pipe, nread, *buf, on_stdout_write);
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write_data((uv_stream_t *)&file_pipe, nread, *buf, on_file_write);
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}
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// OK to free buffer as write_data copies it.
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if (buf->base)
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free(buf->base);
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}
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int main(int argc, char **argv) {
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loop = uv_default_loop();
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uv_pipe_init(loop, &stdin_pipe, 0);
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uv_pipe_open(&stdin_pipe, 0);
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uv_pipe_init(loop, &stdout_pipe, 0);
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uv_pipe_open(&stdout_pipe, 1);
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uv_fs_t file_req;
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int fd = uv_fs_open(loop, &file_req, argv[1], O_CREAT | O_RDWR, 0644, NULL);
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uv_pipe_init(loop, &file_pipe, 0);
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uv_pipe_open(&file_pipe, fd);
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uv_read_start((uv_stream_t*)&stdin_pipe, alloc_buffer, read_stdin);
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uv_run(loop, UV_RUN_DEFAULT);
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return 0;
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}
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