Commit a5e9f3d2 authored by Ondřej Zajíček's avatar Ondřej Zajíček

Restructures birdc and birdcl to merge duplicated code.

The BIRD client code is restructured that most of the code (including
main function) is shared in client.c, while birdc.c and birdcl.c contain
just I/O-specific callbacks. This removes all duplicated code from
variant-specific files.
parent d2c392d4
source=commands.c util.c common.c
source=commands.c util.c client.c
root-rel=../
dir-name=client
......
/*
* BIRD Client - Readline variant I/O
*
* (c) 1999--2004 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>
#include <readline/readline.h>
#include <readline/history.h>
#include <curses.h>
#include "nest/bird.h"
#include "lib/resource.h"
#include "lib/string.h"
#include "client/client.h"
#include "sysdep/unix/unix.h"
static int input_hidden_end;
static int prompt_active;
/*** Input ***/
/* HACK: libreadline internals we need to access */
extern int _rl_vis_botlin;
extern void _rl_move_vert(int);
extern Function *rl_last_func;
static void
add_history_dedup(char *cmd)
{
/* Add history line if it differs from the last one */
HIST_ENTRY *he = history_get(history_length);
if (!he || strcmp(he->line, cmd))
add_history(cmd);
}
static void
input_got_line(char *cmd_buffer)
{
if (!cmd_buffer)
{
cleanup();
exit(0);
}
if (cmd_buffer[0])
{
add_history_dedup(cmd_buffer);
submit_command(cmd_buffer);
}
free(cmd_buffer);
}
void
input_start_list(void)
{
/* Leave the currently edited line and make space for listing */
_rl_move_vert(_rl_vis_botlin);
#ifdef HAVE_RL_CRLF
rl_crlf();
#endif
}
void
input_stop_list(void)
{
/* Reprint the currently edited line after listing */
rl_on_new_line();
rl_redisplay();
}
static int
input_complete(int arg UNUSED, int key UNUSED)
{
static int complete_flag;
char buf[256];
if (rl_last_func != input_complete)
complete_flag = 0;
switch (cmd_complete(rl_line_buffer, rl_point, buf, complete_flag))
{
case 0:
complete_flag = 1;
break;
case 1:
rl_insert_text(buf);
break;
default:
complete_flag = 1;
#ifdef HAVE_RL_DING
rl_ding();
#endif
}
return 0;
}
static int
input_help(int arg, int key UNUSED)
{
int i, in_string, in_bracket;
if (arg != 1)
return rl_insert(arg, '?');
in_string = in_bracket = 0;
for (i = 0; i < rl_point; i++)
{
if (rl_line_buffer[i] == '"')
in_string = ! in_string;
else if (! in_string)
{
if (rl_line_buffer[i] == '[')
in_bracket++;
else if (rl_line_buffer[i] == ']')
in_bracket--;
}
}
/* `?' inside string or path -> insert */
if (in_string || in_bracket)
return rl_insert(1, '?');
rl_begin_undo_group(); /* HACK: We want to display `?' at point position */
rl_insert_text("?");
rl_redisplay();
rl_end_undo_group();
input_start_list();
cmd_help(rl_line_buffer, rl_point);
rl_undo_command(1, 0);
input_stop_list();
return 0;
}
void
input_init(void)
{
rl_readline_name = "birdc";
rl_add_defun("bird-complete", input_complete, '\t');
rl_add_defun("bird-help", input_help, '?');
rl_callback_handler_install("bird> ", input_got_line);
// rl_get_screen_size();
term_lns = LINES ? LINES : 25;
term_cls = COLS ? COLS : 80;
prompt_active = 1;
// readline library does strange things when stdin is nonblocking.
// if (fcntl(0, F_SETFL, O_NONBLOCK) < 0)
// die("fcntl: %m");
}
static void
input_reveal(void)
{
/* need this, otherwise some lib seems to eat pending output when
the prompt is displayed */
fflush(stdout);
tcdrain(STDOUT_FILENO);
rl_end = input_hidden_end;
rl_expand_prompt("bird> ");
rl_forced_update_display();
prompt_active = 1;
}
static void
input_hide(void)
{
input_hidden_end = rl_end;
rl_end = 0;
rl_expand_prompt("");
rl_redisplay();
prompt_active = 0;
}
void
input_notify(int prompt)
{
if (prompt == prompt_active)
return;
if (prompt)
input_reveal();
else
input_hide();
}
void
input_read(void)
{
rl_callback_read_char();
}
void
more_begin(void)
{
}
void
more_end(void)
{
}
void
cleanup(void)
{
if (init)
return;
input_hide();
rl_callback_handler_remove();
}
/*
* BIRD Client - Light variant I/O
*
* (c) 1999--2004 Martin Mares <mj@ucw.cz>
* (c) 2013 Tomas Hlavacek <tomas.hlavacek@nic.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <signal.h>
#include "nest/bird.h"
#include "lib/resource.h"
#include "lib/string.h"
#include "client/client.h"
#include "sysdep/unix/unix.h"
#define INPUT_BUF_LEN 2048
struct termios tty_save;
void
input_start_list(void)
{
/* Empty in non-ncurses version. */
}
void
input_stop_list(void)
{
/* Empty in non-ncurses version. */
}
void
input_notify(int prompt)
{
/* No ncurses -> no status to reveal/hide, print prompt manually. */
if (!prompt)
return;
printf("bird> ");
fflush(stdout);
}
static int
lastnb(char *str, int i)
{
while (i--)
if ((str[i] != ' ') && (str[i] != '\t'))
return str[i];
return 0;
}
void
input_read(void)
{
char buf[INPUT_BUF_LEN];
if ((fgets(buf, INPUT_BUF_LEN, stdin) == NULL) || (buf[0] == 0))
{
putchar('\n');
cleanup();
exit(0);
}
int l = strlen(buf);
if ((l+1) == INPUT_BUF_LEN)
{
printf("Input too long.\n");
return;
}
if (buf[l-1] == '\n')
buf[--l] = '\0';
if (!interactive)
printf("%s\n", buf);
if (l == 0)
return;
if (lastnb(buf, l) == '?')
{
cmd_help(buf, strlen(buf));
return;
}
submit_command(buf);
}
static struct termios stored_tty;
static int more_active = 0;
void
more_begin(void)
{
static struct termios tty;
tty = stored_tty;
tty.c_lflag &= (~ECHO);
tty.c_lflag &= (~ICANON);
if (tcsetattr (0, TCSANOW, &tty) < 0)
die("tcsetattr: %m");
more_active = 1;
}
void
more_end(void)
{
more_active = 0;
if (tcsetattr (0, TCSANOW, &stored_tty) < 0)
die("tcsetattr: %m");
}
static void
sig_handler(int signal)
{
cleanup();
exit(0);
}
void
input_init(void)
{
if (!interactive)
return;
if (tcgetattr(0, &stored_tty) < 0)
die("tcgetattr: %m");
if (signal(SIGINT, sig_handler) == SIG_IGN)
signal(SIGINT, SIG_IGN);
if (signal(SIGTERM, sig_handler) == SIG_IGN)
signal(SIGTERM, SIG_IGN);
struct winsize tws;
if (ioctl(0, TIOCGWINSZ, &tws) == 0)
{
term_lns = tws.ws_row;
term_cls = tws.ws_col;
}
else
{
term_lns = 25;
term_cls = 80;
}
}
void
cleanup(void)
{
if (more_active)
more_end();
}
/*
* BIRD Client
*
* (c) 1999--2004 Martin Mares <mj@ucw.cz>
* (c) 2013 Tomas Hlavacek <tmshlvck@gmail.com>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
/**
* DOC: BIRD client
*
* There are two variants of BIRD client: regular and light. regular
* variant depends on readline and ncurses libraries, while light
* variant uses just libc. Most of the code and the main() is common
* for both variants (in client.c file) and just a few functions are
* different (in birdc.c for regular and birdcl.c for light). Two
* binaries are generated by linking common object files like client.o
* (which is compiled from client.c just once) with either birdc.o or
* birdcl.o for each variant.
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/types.h>
#include "nest/bird.h"
#include "lib/resource.h"
#include "lib/string.h"
#include "client/client.h"
#include "sysdep/unix/unix.h"
#define SERVER_READ_BUF_LEN 4096
static char *opt_list = "s:vr";
static int verbose, restricted, once;
static char *init_cmd;
static char *server_path = PATH_CONTROL_SOCKET;
static int server_fd;
static byte server_read_buf[SERVER_READ_BUF_LEN];
static byte *server_read_pos = server_read_buf;
int init = 1; /* During intial sequence */
int busy = 1; /* Executing BIRD command */
int interactive; /* Whether stdin is terminal */
static int num_lines, skip_input;
int term_lns, term_cls;
/*** Parsing of arguments ***/
static void
usage(char *name)
{
fprintf(stderr, "Usage: %s [-s <control-socket>] [-v] [-r]\n", name);
exit(1);
}
static void
parse_args(int argc, char **argv)
{
int c;
while ((c = getopt(argc, argv, opt_list)) >= 0)
switch (c)
{
case 's':
server_path = optarg;
break;
case 'v':
verbose++;
break;
case 'r':
restricted = 1;
break;
default:
usage(argv[0]);
}
/* If some arguments are not options, we take it as commands */
if (optind < argc)
{
char *tmp;
int i;
int len = 0;
for (i = optind; i < argc; i++)
len += strlen(argv[i]) + 1;
tmp = init_cmd = malloc(len);
for (i = optind; i < argc; i++)
{
strcpy(tmp, argv[i]);
tmp += strlen(tmp);
*tmp++ = ' ';
}
tmp[-1] = 0;
once = 1;
interactive = 0;
}
}
/*** Input ***/
static void server_send(char *cmd);
static int
handle_internal_command(char *cmd)
{
if (!strncmp(cmd, "exit", 4) || !strncmp(cmd, "quit", 4))
{
cleanup();
exit(0);
}
if (!strncmp(cmd, "help", 4))
{
puts("Press `?' for context sensitive help.");
return 1;
}
return 0;
}
static void
submit_server_command(char *cmd)
{
busy = 1;
num_lines = 2;
server_send(cmd);
}
void
submit_command(char *cmd_raw)
{
char *cmd = cmd_expand(cmd_raw);
if (!cmd)
return;
if (!handle_internal_command(cmd))
submit_server_command(cmd);
free(cmd);
}
static void
init_commands(void)
{
if (restricted)
{
submit_server_command("restrict");
restricted = 0;
return;
}
if (init_cmd)
{
/* First transition - client received hello from BIRD
and there is waiting initial command */
submit_server_command(init_cmd);
init_cmd = NULL;
return;
}
if (once)
{
/* Initial command is finished and we want to exit */
cleanup();
exit(0);
}
input_init();
init = 0;
}
/*** Output ***/
void
more(void)
{
more_begin();
printf("--More--\015");
fflush(stdout);
redo:
switch (getchar())
{
case ' ':
num_lines = 2;
break;
case '\n':
case '\r':
num_lines--;
break;
case 'q':
skip_input = 1;
break;
default:
goto redo;
}
printf(" \015");
fflush(stdout);
more_end();
}
/*** Communication with server ***/
static void
server_connect(void)
{
struct sockaddr_un sa;
server_fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (server_fd < 0)
die("Cannot create socket: %m");
if (strlen(server_path) >= sizeof(sa.sun_path))
die("server_connect: path too long");
bzero(&sa, sizeof(sa));
sa.sun_family = AF_UNIX;
strcpy(sa.sun_path, server_path);
if (connect(server_fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) < 0)
die("Unable to connect to server control socket (%s): %m", server_path);
if (fcntl(server_fd, F_SETFL, O_NONBLOCK) < 0)
die("fcntl: %m");
}
#define PRINTF(LEN, PARGS...) do { if (!skip_input) len = printf(PARGS); } while(0)
static void
server_got_reply(char *x)
{
int code;
int len = 0;
if (*x == '+') /* Async reply */
PRINTF(len, ">>> %s\n", x+1);
else if (x[0] == ' ') /* Continuation */
PRINTF(len, "%s%s\n", verbose ? " " : "", x+1);
else if (strlen(x) > 4 &&
sscanf(x, "%d", &code) == 1 && code >= 0 && code < 10000 &&
(x[4] == ' ' || x[4] == '-'))
{
if (code)
PRINTF(len, "%s\n", verbose ? x : x+5);
if (x[4] == ' ')
{
busy = 0;
skip_input = 0;
return;
}
}
else
PRINTF(len, "??? <%s>\n", x);
if (interactive && busy && !skip_input && !init && (len > 0))
{
num_lines += (len + term_cls - 1) / term_cls; /* Divide and round up */
if (num_lines >= term_lns)
more();
}
}
static void
server_read(void)
{
int c;
byte *start, *p;
redo:
c = read(server_fd, server_read_pos, server_read_buf + sizeof(server_read_buf) - server_read_pos);
if (!c)
die("Connection closed by server.");
if (c < 0)
{
if (errno == EINTR)
goto redo;
else
die("Server read error: %m");
}
start = server_read_buf;
p = server_read_pos;
server_read_pos += c;
while (p < server_read_pos)
if (*p++ == '\n')
{
p[-1] = 0;
server_got_reply(start);
start = p;
}
if (start != server_read_buf)
{
int l = server_read_pos - start;
memmove(server_read_buf, start, l);
server_read_pos = server_read_buf + l;
}
else if (server_read_pos == server_read_buf + sizeof(server_read_buf))
{
strcpy(server_read_buf, "?<too-long>");
server_read_pos = server_read_buf + 11;
}
}
static void
select_loop(void)
{
int rv;
while (1)
{
if (init && !busy)
init_commands();
if (!init)
input_notify(!busy);
fd_set select_fds;
FD_ZERO(&select_fds);
FD_SET(server_fd, &select_fds);
if (!busy)
FD_SET(0, &select_fds);
rv = select(server_fd+1, &select_fds, NULL, NULL, NULL);
if (rv < 0)
{
if (errno == EINTR)
continue;
else
die("select: %m");
}
if (FD_ISSET(0, &select_fds))
{
input_read();
continue;
}
if (FD_ISSET(server_fd, &select_fds))
{
server_read();
continue;
}
}
}
static void
wait_for_write(int fd)
{
while (1)
{
int rv;
fd_set set;
FD_ZERO(&set);
FD_SET(fd, &set);
rv = select(fd+1, NULL, &set, NULL, NULL);
if (rv < 0)
{
if (errno == EINTR)
continue;