- stdout2 = chk_non_negative(dup(STDIN_FILENO), "Preserving STDOUT before compressing");
- chk_zero(pipe(rw), "Opening pipe from compressor subprocess");
- gzpid = chk_non_negative(fork(), "Forking compressor subprocess");
- if(gzpid==0) {
- /* child */
- chk_zero(close(rw[1]), "Closing write end of pipe in child");
- chk_zero(close(STDIN_FILENO), "Closing STDIN");
- chk_non_negative(dup2(rw[0],STDIN_FILENO), "Redirecting compressor input to stdin");
- execlp(filter,filter,NULL);
- _exit(-1);
- }
- /* parent */
- chk_zero(close(rw[0]), "Closing read end of pipe");
- chk_non_negative(dup2(rw[1],STDOUT_FILENO), "Redirecting output to compressor");
-