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cmd.c    391 lines (344 with data), 8.3 kB

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/* $Id: cmd.c,v 1.89 2009-04-03 17:21:46 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "tmux.h"
const struct cmd_entry *cmd_table[] = {
&cmd_attach_session_entry,
&cmd_bind_key_entry,
&cmd_break_pane_entry,
&cmd_choose_session_entry,
&cmd_choose_window_entry,
&cmd_clock_mode_entry,
&cmd_command_prompt_entry,
&cmd_copy_buffer_entry,
&cmd_copy_mode_entry,
&cmd_delete_buffer_entry,
&cmd_detach_client_entry,
&cmd_down_pane_entry,
&cmd_find_window_entry,
&cmd_has_session_entry,
&cmd_kill_pane_entry,
&cmd_kill_server_entry,
&cmd_kill_session_entry,
&cmd_kill_window_entry,
&cmd_last_window_entry,
&cmd_link_window_entry,
&cmd_list_buffers_entry,
&cmd_list_clients_entry,
&cmd_list_commands_entry,
&cmd_list_keys_entry,
&cmd_list_sessions_entry,
&cmd_list_windows_entry,
&cmd_load_buffer_entry,
&cmd_lock_server_entry,
&cmd_move_window_entry,
&cmd_new_session_entry,
&cmd_new_window_entry,
&cmd_next_layout_entry,
&cmd_next_window_entry,
&cmd_paste_buffer_entry,
&cmd_previous_window_entry,
&cmd_refresh_client_entry,
&cmd_rename_session_entry,
&cmd_rename_window_entry,
&cmd_resize_pane_down_entry,
&cmd_resize_pane_up_entry,
&cmd_respawn_window_entry,
&cmd_rotate_window_entry,
&cmd_save_buffer_entry,
&cmd_scroll_mode_entry,
&cmd_select_pane_entry,
&cmd_select_prompt_entry,
&cmd_select_window_entry,
&cmd_send_keys_entry,
&cmd_send_prefix_entry,
&cmd_server_info_entry,
&cmd_set_buffer_entry,
&cmd_set_option_entry,
&cmd_set_password_entry,
&cmd_set_window_option_entry,
&cmd_show_buffer_entry,
&cmd_show_options_entry,
&cmd_show_window_options_entry,
&cmd_source_file_entry,
&cmd_split_window_entry,
&cmd_start_server_entry,
&cmd_suspend_client_entry,
&cmd_swap_pane_entry,
&cmd_swap_window_entry,
&cmd_switch_client_entry,
&cmd_unbind_key_entry,
&cmd_unlink_window_entry,
&cmd_up_pane_entry,
NULL
};
struct cmd *
cmd_parse(int argc, char **argv, char **cause)
{
const struct cmd_entry **entryp, *entry;
struct cmd *cmd;
char s[BUFSIZ];
int opt;
*cause = NULL;
if (argc == 0)
return (NULL);
entry = NULL;
for (entryp = cmd_table; *entryp != NULL; entryp++) {
if ((*entryp)->alias != NULL &&
strcmp((*entryp)->alias, argv[0]) == 0) {
entry = *entryp;
break;
}
if (strncmp((*entryp)->name, argv[0], strlen(argv[0])) != 0)
continue;
if (entry != NULL)
goto ambiguous;
entry = *entryp;
/* Bail now if an exact match. */
if (strcmp(entry->name, argv[0]) == 0)
break;
}
if (entry == NULL) {
xasprintf(cause, "unknown command: %s", argv[0]);
return (NULL);
}
optreset = 1;
optind = 1;
if (entry->parse == NULL) {
while ((opt = getopt(argc, argv, "")) != -1) {
switch (opt) {
default:
goto usage;
}
}
argc -= optind;
argv += optind;
if (argc != 0)
goto usage;
}
cmd = xmalloc(sizeof *cmd);
cmd->entry = entry;
cmd->data = NULL;
if (entry->parse != NULL) {
if (entry->parse(cmd, argc, argv, cause) != 0) {
xfree(cmd);
return (NULL);
}
}
return (cmd);
ambiguous:
*s = '\0';
for (entryp = cmd_table; *entryp != NULL; entryp++) {
if (strncmp((*entryp)->name, argv[0], strlen(argv[0])) != 0)
continue;
if (strlcat(s, (*entryp)->name, sizeof s) >= sizeof s)
break;
if (strlcat(s, ", ", sizeof s) >= sizeof s)
break;
}
s[strlen(s) - 2] = '\0';
xasprintf(cause, "ambiguous command: %s, could be: %s", argv[0], s);
return (NULL);
usage:
xasprintf(cause, "usage: %s %s", entry->name, entry->usage);
return (NULL);
}
int
cmd_exec(struct cmd *cmd, struct cmd_ctx *ctx)
{
if (server_locked) {
ctx->error(ctx, "server is locked");
return (-1);
}
return (cmd->entry->exec(cmd, ctx));
}
void
cmd_send(struct cmd *cmd, struct buffer *b)
{
const struct cmd_entry **entryp;
u_int n;
n = 0;
for (entryp = cmd_table; *entryp != NULL; entryp++) {
if (*entryp == cmd->entry)
break;
n++;
}
if (*entryp == NULL)
fatalx("command not found");
buffer_write(b, &n, sizeof n);
if (cmd->entry->send != NULL)
cmd->entry->send(cmd, b);
}
struct cmd *
cmd_recv(struct buffer *b)
{
const struct cmd_entry **entryp;
struct cmd *cmd;
u_int m, n;
buffer_read(b, &m, sizeof m);
n = 0;
for (entryp = cmd_table; *entryp != NULL; entryp++) {
if (n == m)
break;
n++;
}
if (*entryp == NULL)
fatalx("command not found");
cmd = xmalloc(sizeof *cmd);
cmd->entry = *entryp;
if (cmd->entry->recv != NULL)
cmd->entry->recv(cmd, b);
return (cmd);
}
void
cmd_free(struct cmd *cmd)
{
if (cmd->data != NULL && cmd->entry->free != NULL)
cmd->entry->free(cmd);
xfree(cmd);
}
size_t
cmd_print(struct cmd *cmd, char *buf, size_t len)
{
if (cmd->entry->print == NULL) {
return (xsnprintf(buf, len, "%s", cmd->entry->name));
}
return (cmd->entry->print(cmd, buf, len));
}
void
cmd_send_string(struct buffer *b, const char *s)
{
size_t n;
if (s == NULL) {
n = 0;
buffer_write(b, &n, sizeof n);
return;
}
n = strlen(s) + 1;
buffer_write(b, &n, sizeof n);
buffer_write(b, s, n);
}
char *
cmd_recv_string(struct buffer *b)
{
char *s;
size_t n;
buffer_read(b, &n, sizeof n);
if (n == 0)
return (NULL);
s = xmalloc(n);
buffer_read(b, s, n);
s[n - 1] = '\0';
return (s);
}
struct session *
cmd_current_session(struct cmd_ctx *ctx)
{
struct msg_command_data *data = ctx->msgdata;
struct timeval *tv;
struct session *s, *newest = NULL;
u_int i;
if (ctx->cursession != NULL)
return (ctx->cursession);
if (data != NULL && data->pid != -1) {
if (data->pid != getpid()) {
ctx->error(ctx, "wrong server: %ld", (long) data->pid);
return (NULL);
}
if (data->idx > ARRAY_LENGTH(&sessions)) {
ctx->error(ctx, "index out of range: %d", data->idx);
return (NULL);
}
if ((s = ARRAY_ITEM(&sessions, data->idx)) == NULL) {
ctx->error(ctx, "session doesn't exist: %u", data->idx);
return (NULL);
}
return (s);
}
tv = NULL;
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
s = ARRAY_ITEM(&sessions, i);
if (s != NULL && (tv == NULL || timercmp(&s->tv, tv, >))) {
newest = ARRAY_ITEM(&sessions, i);
tv = &s->tv;
}
}
return (newest);
}
struct client *
cmd_find_client(struct cmd_ctx *ctx, const char *arg)
{
struct client *c;
if (arg == NULL)
c = ctx->curclient;
else {
if ((c = arg_parse_client(arg)) == NULL) {
if (arg != NULL)
ctx->error(ctx, "client not found: %s", arg);
else
ctx->error(ctx, "no client found");
}
}
return (c);
}
struct session *
cmd_find_session(struct cmd_ctx *ctx, const char *arg)
{
struct session *s;
if (arg == NULL)
s = cmd_current_session(ctx);
else {
if ((s = arg_parse_session(arg)) == NULL) {
if (arg != NULL)
ctx->error(ctx, "session not found: %s", arg);
else
ctx->error(ctx, "no session found");
}
}
return (s);
}
struct winlink *
cmd_find_window(struct cmd_ctx *ctx, const char *arg, struct session **sp)
{
struct session *s;
struct winlink *wl;
int idx;
wl = NULL;
if (arg_parse_window(arg, &s, &idx) != 0) {
ctx->error(ctx, "bad window: %s", arg);
return (NULL);
}
if (s == NULL)
s = ctx->cursession;
if (s == NULL)
s = cmd_current_session(ctx);
if (s == NULL)
return (NULL);
if (sp != NULL)
*sp = s;
if (idx == -1)
wl = s->curw;
else
wl = winlink_find_by_index(&s->windows, idx);
if (wl == NULL)
ctx->error(ctx, "window not found: %s:%d", s->name, idx);
return (wl);
}