dup2 1251 core/ngx_cycle.c if (dup2(cycle->log->file->fd, STDERR_FILENO) == -1) { dup2 43 os/unix/ngx_daemon.c if (dup2(fd, STDIN_FILENO) == -1) { dup2 48 os/unix/ngx_daemon.c if (dup2(fd, STDOUT_FILENO) == -1) { dup2 54 os/unix/ngx_daemon.c if (dup2(fd, STDERR_FILENO) == -1) { dup2 324 os/unix/ngx_files.h #define ngx_set_stderr(fd) dup2(fd, STDERR_FILENO) dup2 104 os/unix/ngx_posix_init.c if (dup2(pp[1], STDERR_FILENO) == -1) {