static int maybe_abort_out(FILE *in, Socket *out) { unsigned int i = ftp_sigints(); ftp_set_close_handler(); ftp->ti.finished = true; if(ftp->ti.interrupted) i++; if(i > 0 || ferror(in) || sock_error_out(out)) { if(ferror(in)) { ftp_err(_("read error: %s\n"), strerror(errno)); ftp->ti.ioerror = true; } else if (sock_error_out(out)) { ftp_err(_("write error: %s\n"), strerror(errno)); ftp->ti.ioerror = true; } return ftp_abort(out); } return 0; }
/* sends an FTP command on the control channel * returns reply status code on success or -1 on error */ int ftp_cmd(const char *cmd, ...) { va_list ap; int resp; bool recon = false; if(!sock_connected(ftp->ctrl)) { ftp_err(_("No control connection\n")); ftp->code = ctNone; ftp->fullcode = -1; return -1; } ftp_set_abort_handler(); ugly: va_start(ap, cmd); sock_krb_vprintf(ftp->ctrl, cmd, ap); sock_printf(ftp->ctrl, "\r\n"); sock_flush(ftp->ctrl); va_end(ap); if (sock_error_out(ftp->ctrl)) { ftp_err(_("error writing command")); ftp_err(" ("); va_start(ap, cmd); vfprintf(stderr, cmd, ap); va_end(ap); va_start(ap, cmd); ftp_vtrace(cmd, ap); va_end(ap); ftp_err(")\n"); ftp->code = ctNone; ftp->fullcode = -1; return -1; } va_start(ap, cmd); ftp_print_cmd(cmd, ap); va_end(ap); resp = ftp_read_reply(); ftp_set_close_handler(); if(resp == 421) { /* server is closing control connection! */ ftp_err(_("Server closed control connection\n")); if(gvAutoReconnect && ftp_loggedin() && strcasecmp(cmd, "QUIT") != 0) { if(recon) { ftp_err(_("Reconnect failed\n")); } else { ftp_err(_("Automatic reconnect...\n")); ftp_reopen(); recon = true; goto ugly; } } else { /* ftp_close();*/ ftp->fullcode = 421; ftp->code = 4; return -1; } } return resp; }