mirror of
https://github.com/tmux/tmux.git
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406 lines
8.4 KiB
C
406 lines
8.4 KiB
C
/* $Id: cmd.c,v 1.63 2008-08-28 17:45:25 nicm Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <sys/time.h>
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#include <getopt.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "tmux.h"
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const struct cmd_entry *cmd_table[] = {
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&cmd_attach_session_entry,
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&cmd_bind_key_entry,
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&cmd_command_prompt_entry,
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&cmd_copy_mode_entry,
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&cmd_delete_buffer_entry,
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&cmd_detach_client_entry,
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&cmd_has_session_entry,
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&cmd_kill_server_entry,
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&cmd_kill_session_entry,
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&cmd_kill_window_entry,
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&cmd_last_window_entry,
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&cmd_link_window_entry,
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&cmd_list_buffers_entry,
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&cmd_list_clients_entry,
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&cmd_list_commands_entry,
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&cmd_list_keys_entry,
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&cmd_list_sessions_entry,
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&cmd_list_windows_entry,
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&cmd_move_window_entry,
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&cmd_new_session_entry,
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&cmd_new_window_entry,
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&cmd_next_window_entry,
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&cmd_paste_buffer_entry,
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&cmd_previous_window_entry,
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&cmd_refresh_client_entry,
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&cmd_rename_session_entry,
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&cmd_rename_window_entry,
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&cmd_respawn_window_entry,
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&cmd_scroll_mode_entry,
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&cmd_select_prompt_entry,
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&cmd_select_window_entry,
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&cmd_send_keys_entry,
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&cmd_send_prefix_entry,
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&cmd_set_buffer_entry,
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&cmd_set_option_entry,
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&cmd_set_window_option_entry,
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&cmd_show_buffer_entry,
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&cmd_show_options_entry,
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&cmd_show_window_options_entry,
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&cmd_start_server_entry,
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&cmd_swap_window_entry,
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&cmd_switch_client_entry,
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&cmd_unbind_key_entry,
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&cmd_unlink_window_entry,
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NULL
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};
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char *
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cmd_complete(const char *s)
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{
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const struct cmd_entry **entryp;
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ARRAY_DECL(, const char *) list;
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char *prefix, *s2;
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u_int i;
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size_t j;
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if (*s == '\0')
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return (xstrdup(s));
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/* First, build a list of all the possible matches. */
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ARRAY_INIT(&list);
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for (entryp = cmd_table; *entryp != NULL; entryp++) {
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if (strncmp((*entryp)->name, s, strlen(s)) != 0)
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continue;
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ARRAY_ADD(&list, (*entryp)->name);
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}
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/* If none, bail now with the original string. */
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if (ARRAY_LENGTH(&list) == 0) {
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ARRAY_FREE(&list);
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return (xstrdup(s));
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}
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/* If an exact match, return it, with a trailing space. */
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if (ARRAY_LENGTH(&list) == 1) {
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xasprintf(&s2, "%s ", ARRAY_FIRST(&list));
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ARRAY_FREE(&list);
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return (s2);
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}
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/* Now loop through the list and find the longest common prefix. */
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prefix = xstrdup(ARRAY_FIRST(&list));
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for (i = 1; i < ARRAY_LENGTH(&list); i++) {
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s = ARRAY_ITEM(&list, i);
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j = strlen(s);
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if (j > strlen(prefix))
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j = strlen(prefix);
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for (; j > 0; j--) {
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if (prefix[j - 1] != s[j - 1])
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prefix[j - 1] = '\0';
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}
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}
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ARRAY_FREE(&list);
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return (prefix);
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}
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struct cmd *
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cmd_parse(int argc, char **argv, char **cause)
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{
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const struct cmd_entry **entryp, *entry;
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struct cmd *cmd;
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char s[BUFSIZ];
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int opt;
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*cause = NULL;
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if (argc == 0)
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return (NULL);
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entry = NULL;
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for (entryp = cmd_table; *entryp != NULL; entryp++) {
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if ((*entryp)->alias != NULL &&
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strcmp((*entryp)->alias, argv[0]) == 0) {
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entry = *entryp;
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break;
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}
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if (strncmp((*entryp)->name, argv[0], strlen(argv[0])) != 0)
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continue;
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if (entry != NULL)
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goto ambiguous;
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entry = *entryp;
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/* Bail now if an exact match. */
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if (strcmp(entry->name, argv[0]) == 0)
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break;
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}
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if (entry == NULL) {
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xasprintf(cause, "unknown command: %s", argv[0]);
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return (NULL);
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}
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optind = 1;
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if (entry->parse == NULL) {
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while ((opt = getopt(argc, argv, "")) != EOF) {
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switch (opt) {
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default:
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goto usage;
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 0)
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goto usage;
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}
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cmd = xmalloc(sizeof *cmd);
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cmd->entry = entry;
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cmd->data = NULL;
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if (entry->parse != NULL) {
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if (entry->parse(cmd, argc, argv, cause) != 0) {
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xfree(cmd);
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return (NULL);
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}
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}
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return (cmd);
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ambiguous:
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*s = '\0';
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for (entryp = cmd_table; *entryp != NULL; entryp++) {
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if (strncmp((*entryp)->name, argv[0], strlen(argv[0])) != 0)
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continue;
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if (strlcat(s, (*entryp)->name, sizeof s) >= sizeof s)
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break;
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if (strlcat(s, ", ", sizeof s) >= sizeof s)
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break;
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}
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s[strlen(s) - 2] = '\0';
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xasprintf(cause, "ambiguous command: %s, could be: %s", argv[0], s);
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return (NULL);
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usage:
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xasprintf(cause, "usage: %s %s", entry->name, entry->usage);
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return (NULL);
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}
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void
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cmd_exec(struct cmd *cmd, struct cmd_ctx *ctx)
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{
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cmd->entry->exec(cmd, ctx);
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}
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void
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cmd_send(struct cmd *cmd, struct buffer *b)
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{
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const struct cmd_entry **entryp;
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u_int n;
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n = 0;
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for (entryp = cmd_table; *entryp != NULL; entryp++) {
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if (*entryp == cmd->entry)
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break;
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n++;
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}
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if (*entryp == NULL)
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fatalx("command not found");
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buffer_write(b, &n, sizeof n);
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if (cmd->entry->send != NULL)
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cmd->entry->send(cmd, b);
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}
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struct cmd *
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cmd_recv(struct buffer *b)
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{
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const struct cmd_entry **entryp;
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struct cmd *cmd;
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u_int m, n;
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buffer_read(b, &m, sizeof m);
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n = 0;
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for (entryp = cmd_table; *entryp != NULL; entryp++) {
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if (n == m)
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break;
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n++;
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}
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if (*entryp == NULL)
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fatalx("command not found");
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cmd = xmalloc(sizeof *cmd);
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cmd->entry = *entryp;
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if (cmd->entry->recv != NULL)
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cmd->entry->recv(cmd, b);
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return (cmd);
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}
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void
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cmd_free(struct cmd *cmd)
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{
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if (cmd->data != NULL && cmd->entry->free != NULL)
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cmd->entry->free(cmd);
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xfree(cmd);
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}
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void
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cmd_send_string(struct buffer *b, const char *s)
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{
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size_t n;
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if (s == NULL) {
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n = 0;
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buffer_write(b, &n, sizeof n);
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return;
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}
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n = strlen(s) + 1;
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buffer_write(b, &n, sizeof n);
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buffer_write(b, s, n);
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}
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char *
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cmd_recv_string(struct buffer *b)
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{
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char *s;
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size_t n;
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buffer_read(b, &n, sizeof n);
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if (n == 0)
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return (NULL);
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s = xmalloc(n);
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buffer_read(b, s, n);
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s[n - 1] = '\0';
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return (s);
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}
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struct session *
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cmd_current_session(struct cmd_ctx *ctx)
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{
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struct msg_command_data *data = ctx->msgdata;
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struct timeval *tv;
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struct session *s, *newest = NULL;
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u_int i;
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if (ctx->cursession != NULL)
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return (ctx->cursession);
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if (data != NULL && data->pid != -1) {
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if (data->pid != getpid()) {
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ctx->error(ctx, "wrong server: %ld", (long) data->pid);
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return (NULL);
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}
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if (data->idx > ARRAY_LENGTH(&sessions)) {
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ctx->error(ctx, "index out of range: %d", data->idx);
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return (NULL);
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}
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if ((s = ARRAY_ITEM(&sessions, data->idx)) == NULL) {
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ctx->error(ctx, "session doesn't exist: %u", data->idx);
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return (NULL);
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}
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return (s);
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}
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tv = NULL;
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for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
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s = ARRAY_ITEM(&sessions, i);
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if (s != NULL && (tv == NULL || timercmp(&s->tv, tv, >))) {
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newest = ARRAY_ITEM(&sessions, i);
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tv = &s->tv;
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}
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}
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return (newest);
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}
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struct client *
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cmd_find_client(struct cmd_ctx *ctx, const char *arg)
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{
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struct client *c;
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if (arg == NULL)
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c = ctx->curclient;
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else {
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if ((c = arg_parse_client(arg)) == NULL) {
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if (arg != NULL)
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ctx->error(ctx, "client not found: %s", arg);
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else
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ctx->error(ctx, "no client found");
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}
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}
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return (c);
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}
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struct session *
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cmd_find_session(struct cmd_ctx *ctx, const char *arg)
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{
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struct session *s;
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if (arg == NULL)
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s = cmd_current_session(ctx);
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else {
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if ((s = arg_parse_session(arg)) == NULL) {
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if (arg != NULL)
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ctx->error(ctx, "session not found: %s", arg);
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else
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ctx->error(ctx, "no session found");
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}
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}
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return (s);
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}
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struct winlink *
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cmd_find_window(struct cmd_ctx *ctx, const char *arg, struct session **sp)
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{
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struct session *s;
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struct winlink *wl;
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int idx;
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wl = NULL;
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if (arg_parse_window(arg, &s, &idx) != 0) {
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ctx->error(ctx, "bad window: %s", arg);
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return (NULL);
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}
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if (s == NULL)
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s = ctx->cursession;
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if (s == NULL)
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s = cmd_current_session(ctx);
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if (s == NULL)
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return (NULL);
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if (sp != NULL)
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*sp = s;
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if (idx == -1)
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wl = s->curw;
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else
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wl = winlink_find_by_index(&s->windows, idx);
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if (wl == NULL)
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ctx->error(ctx, "window not found: %s:%d", s->name, idx);
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return (wl);
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}
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