Pull out independent routines from client_full.c
Pull out routines for interacting with the server and interpreting internal commands which are not dependent on libreadline and ncurses libraries. This is a preparation step for a new lightweight birdc client.
This commit is contained in:
Tomas Hlavacek
parent
5c2c4ea8b1
commit
e454916149
4 changed files with 252 additions and 207 deletions
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@ -1,4 +1,4 @@
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source=client_full.c commands.c util.c
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source=client_full.c commands.c util.c client_common.c
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root-rel=../
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dir-name=client
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@ -18,3 +18,17 @@ void cmd_build_tree(void);
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void cmd_help(char *cmd, int len);
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int cmd_complete(char *cmd, int len, char *buf, int again);
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char *cmd_expand(char *cmd);
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/* client_common.c */
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#define STATE_PROMPT 0
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#define STATE_CMD_SERVER 1
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#define STATE_CMD_USER 2
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#define SERVER_READ_BUF_LEN 4096
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int handle_internal_command(char *cmd);
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void submit_server_command(char *cmd);
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void server_connect(void);
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void server_read(void);
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void server_send(char *cmd);
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179
client/client_common.c
Normal file
179
client/client_common.c
Normal file
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@ -0,0 +1,179 @@
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/*
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* BIRD Client
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*
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* (c) 1999--2004 Martin Mares <mj@ucw.cz>
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* (c) 2013 Tomas Hlavacek <tmshlvck@gmail.com>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/types.h>
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#include "nest/bird.h"
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#include "lib/resource.h"
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#include "lib/string.h"
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#include "client/client.h"
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#include "sysdep/unix/unix.h"
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char *server_path = PATH_CONTROL_SOCKET;
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int server_fd;
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byte server_read_buf[SERVER_READ_BUF_LEN];
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byte *server_read_pos = server_read_buf;
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int input_initialized;
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int input_hidden_end;
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int cstate = STATE_CMD_SERVER;
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int nstate = STATE_CMD_SERVER;
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int num_lines, skip_input, interactive;
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/*** Input ***/
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int
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handle_internal_command(char *cmd)
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{
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if (!strncmp(cmd, "exit", 4) || !strncmp(cmd, "quit", 4))
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{
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cleanup();
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exit(0);
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}
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if (!strncmp(cmd, "help", 4))
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{
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puts("Press `?' for context sensitive help.");
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return 1;
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}
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return 0;
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}
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void
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submit_server_command(char *cmd)
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{
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server_send(cmd);
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nstate = STATE_CMD_SERVER;
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num_lines = 2;
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}
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/*** Communication with server ***/
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void
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server_connect(void)
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{
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struct sockaddr_un sa;
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server_fd = socket(AF_UNIX, SOCK_STREAM, 0);
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if (server_fd < 0)
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die("Cannot create socket: %m");
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if (strlen(server_path) >= sizeof(sa.sun_path))
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die("server_connect: path too long");
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bzero(&sa, sizeof(sa));
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sa.sun_family = AF_UNIX;
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strcpy(sa.sun_path, server_path);
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if (connect(server_fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) < 0)
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die("Unable to connect to server control socket (%s): %m", server_path);
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if (fcntl(server_fd, F_SETFL, O_NONBLOCK) < 0)
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die("fcntl: %m");
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}
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void
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server_read(void)
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{
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int c;
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byte *start, *p;
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redo:
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c = read(server_fd, server_read_pos, server_read_buf + sizeof(server_read_buf) - server_read_pos);
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if (!c)
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die("Connection closed by server.");
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if (c < 0)
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{
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if (errno == EINTR)
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goto redo;
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else
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die("Server read error: %m");
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}
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start = server_read_buf;
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p = server_read_pos;
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server_read_pos += c;
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while (p < server_read_pos)
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if (*p++ == '\n')
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{
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p[-1] = 0;
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server_got_reply(start);
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start = p;
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}
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if (start != server_read_buf)
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{
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int l = server_read_pos - start;
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memmove(server_read_buf, start, l);
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server_read_pos = server_read_buf + l;
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}
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else if (server_read_pos == server_read_buf + sizeof(server_read_buf))
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{
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strcpy(server_read_buf, "?<too-long>");
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server_read_pos = server_read_buf + 11;
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}
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}
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void
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wait_for_write(int fd)
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{
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while (1)
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{
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int rv;
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fd_set set;
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FD_ZERO(&set);
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FD_SET(fd, &set);
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rv = select(fd+1, NULL, &set, NULL, NULL);
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if (rv < 0)
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{
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if (errno == EINTR)
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continue;
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else
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die("select: %m");
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}
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if (FD_ISSET(server_fd, &set))
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return;
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}
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}
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void
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server_send(char *cmd)
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{
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int l = strlen(cmd);
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byte *z = alloca(l + 1);
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memcpy(z, cmd, l);
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z[l++] = '\n';
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while (l)
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{
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int cnt = write(server_fd, z, l);
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if (cnt < 0)
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{
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if (errno == EAGAIN)
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wait_for_write(server_fd);
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else if (errno == EINTR)
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continue;
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else
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die("Server write error: %m");
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}
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else
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{
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l -= cnt;
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z += cnt;
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}
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}
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}
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@ -31,21 +31,17 @@ static char *init_cmd;
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static int once;
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static int restricted;
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static char *server_path = PATH_CONTROL_SOCKET;
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static int server_fd;
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static byte server_read_buf[4096];
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static byte *server_read_pos = server_read_buf;
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extern char *server_path;
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extern int server_fd;
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extern byte server_read_buf[SERVER_READ_BUF_LEN];
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extern byte *server_read_pos;
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#define STATE_PROMPT 0
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#define STATE_CMD_SERVER 1
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#define STATE_CMD_USER 2
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extern int input_initialized;
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extern int input_hidden_end;
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extern int cstate;
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extern int nstate;
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static int input_initialized;
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static int input_hidden_end;
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static int cstate = STATE_CMD_SERVER;
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static int nstate = STATE_CMD_SERVER;
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static int num_lines, skip_input, interactive;
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extern int num_lines, skip_input, interactive;
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/*** Parsing of arguments ***/
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@ -102,37 +98,11 @@ parse_args(int argc, char **argv)
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/*** Input ***/
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static void server_send(char *);
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/* HACK: libreadline internals we need to access */
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extern int _rl_vis_botlin;
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extern void _rl_move_vert(int);
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extern Function *rl_last_func;
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static int
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handle_internal_command(char *cmd)
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{
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if (!strncmp(cmd, "exit", 4) || !strncmp(cmd, "quit", 4))
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{
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cleanup();
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exit(0);
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}
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if (!strncmp(cmd, "help", 4))
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{
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puts("Press `?' for context sensitive help.");
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return 1;
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}
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return 0;
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}
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void
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submit_server_command(char *cmd)
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{
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server_send(cmd);
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nstate = STATE_CMD_SERVER;
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num_lines = 2;
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}
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static void
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add_history_dedup(char *cmd)
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{
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@ -142,8 +112,7 @@ add_history_dedup(char *cmd)
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add_history(cmd);
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}
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static void
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got_line(char *cmd_buffer)
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void got_line(char *cmd_buffer)
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{
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char *cmd;
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@ -284,17 +253,6 @@ input_reveal(void)
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rl_forced_update_display();
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}
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void
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cleanup(void)
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{
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if (input_initialized)
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{
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input_initialized = 0;
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input_hide();
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rl_callback_handler_remove();
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}
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}
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void
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update_state(void)
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{
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@ -364,112 +322,19 @@ more(void)
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fflush(stdout);
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}
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void cleanup(void)
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{
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if (input_initialized)
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{
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input_initialized = 0;
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input_hide();
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rl_callback_handler_remove();
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}
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}
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/*** Communication with server ***/
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static void
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server_connect(void)
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{
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struct sockaddr_un sa;
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server_fd = socket(AF_UNIX, SOCK_STREAM, 0);
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if (server_fd < 0)
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die("Cannot create socket: %m");
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if (strlen(server_path) >= sizeof(sa.sun_path))
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die("server_connect: path too long");
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bzero(&sa, sizeof(sa));
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sa.sun_family = AF_UNIX;
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strcpy(sa.sun_path, server_path);
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if (connect(server_fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) < 0)
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die("Unable to connect to server control socket (%s): %m", server_path);
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if (fcntl(server_fd, F_SETFL, O_NONBLOCK) < 0)
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die("fcntl: %m");
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}
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#define PRINTF(LEN, PARGS...) do { if (!skip_input) len = printf(PARGS); } while(0)
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static void
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server_got_reply(char *x)
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{
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int code;
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int len = 0;
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if (*x == '+') /* Async reply */
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PRINTF(len, ">>> %s\n", x+1);
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else if (x[0] == ' ') /* Continuation */
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PRINTF(len, "%s%s\n", verbose ? " " : "", x+1);
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else if (strlen(x) > 4 &&
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sscanf(x, "%d", &code) == 1 && code >= 0 && code < 10000 &&
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(x[4] == ' ' || x[4] == '-'))
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{
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if (code)
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PRINTF(len, "%s\n", verbose ? x : x+5);
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if (x[4] == ' ')
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{
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nstate = STATE_PROMPT;
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skip_input = 0;
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return;
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}
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}
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else
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PRINTF(len, "??? <%s>\n", x);
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if (skip_input)
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return;
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if (interactive && input_initialized && (len > 0))
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{
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int lns = LINES ? LINES : 25;
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int cls = COLS ? COLS : 80;
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num_lines += (len + cls - 1) / cls; /* Divide and round up */
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if ((num_lines >= lns) && (cstate == STATE_CMD_SERVER))
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more();
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}
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}
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static void
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server_read(void)
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{
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int c;
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byte *start, *p;
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redo:
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c = read(server_fd, server_read_pos, server_read_buf + sizeof(server_read_buf) - server_read_pos);
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if (!c)
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die("Connection closed by server.");
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if (c < 0)
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{
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if (errno == EINTR)
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goto redo;
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else
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die("Server read error: %m");
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}
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start = server_read_buf;
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p = server_read_pos;
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server_read_pos += c;
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while (p < server_read_pos)
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if (*p++ == '\n')
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{
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p[-1] = 0;
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server_got_reply(start);
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start = p;
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}
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if (start != server_read_buf)
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{
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int l = server_read_pos - start;
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memmove(server_read_buf, start, l);
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server_read_pos = server_read_buf + l;
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}
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else if (server_read_pos == server_read_buf + sizeof(server_read_buf))
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{
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strcpy(server_read_buf, "?<too-long>");
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server_read_pos = server_read_buf + 11;
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}
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}
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static fd_set select_fds;
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static void
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@ -508,56 +373,43 @@ select_loop(void)
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}
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}
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static void
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wait_for_write(int fd)
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{
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while (1)
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{
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int rv;
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fd_set set;
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FD_ZERO(&set);
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FD_SET(fd, &set);
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#define PRINTF(LEN, PARGS...) do { if (!skip_input) len = printf(PARGS); } while(0)
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rv = select(fd+1, NULL, &set, NULL, NULL);
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if (rv < 0)
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void server_got_reply(char *x)
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{
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if (errno == EINTR)
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continue;
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else
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die("select: %m");
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}
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int code;
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int len = 0;
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if (FD_ISSET(server_fd, &set))
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if (*x == '+') /* Async reply */
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PRINTF(len, ">>> %s\n", x+1);
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else if (x[0] == ' ') /* Continuation */
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PRINTF(len, "%s%s\n", verbose ? " " : "", x+1);
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else if (strlen(x) > 4 &&
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sscanf(x, "%d", &code) == 1 && code >= 0 && code < 10000 &&
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(x[4] == ' ' || x[4] == '-'))
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{
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if (code)
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PRINTF(len, "%s\n", verbose ? x : x+5);
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if (x[4] == ' ')
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{
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nstate = STATE_PROMPT;
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skip_input = 0;
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return;
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}
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}
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static void
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server_send(char *cmd)
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{
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int l = strlen(cmd);
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byte *z = alloca(l + 1);
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memcpy(z, cmd, l);
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z[l++] = '\n';
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while (l)
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{
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int cnt = write(server_fd, z, l);
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if (cnt < 0)
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{
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if (errno == EAGAIN)
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wait_for_write(server_fd);
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else if (errno == EINTR)
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continue;
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else
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die("Server write error: %m");
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}
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else
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PRINTF(len, "??? <%s>\n", x);
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if (skip_input)
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return;
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if (interactive && input_initialized && (len > 0))
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{
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l -= cnt;
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z += cnt;
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}
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int lns = LINES ? LINES : 25;
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int cls = COLS ? COLS : 80;
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num_lines += (len + cls - 1) / cls; /* Divide and round up */
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if ((num_lines >= lns) && (cstate == STATE_CMD_SERVER))
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more();
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}
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}
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