cmd.c - tmux - Rivoreo Source Code Repositories

 /* $Id: cmd.c,v 1.36 2008-06-02 21:08:36 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 <getopt.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_copy_mode_entry,
 	&cmd_detach_client_entry,
 	&cmd_has_session_entry,
 	&cmd_kill_session_entry,
 	&cmd_kill_window_entry,
 	&cmd_last_window_entry,
 	&cmd_link_window_entry,
 	&cmd_list_clients_entry,
 	&cmd_list_keys_entry,
 	&cmd_list_sessions_entry,
 	&cmd_list_windows_entry,
 	&cmd_new_session_entry,
 	&cmd_new_window_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_scroll_mode_entry,
 	&cmd_select_window_entry,
 	&cmd_send_keys_entry,
 	&cmd_send_prefix_entry,
 	&cmd_set_option_entry,
 	&cmd_start_server_entry,
 	&cmd_swap_window_entry,
 	&cmd_switch_client_entry,
 	&cmd_unbind_key_entry,
 	&cmd_unlink_window_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;
 	}
 	if (entry == NULL) {
 		xasprintf(cause, "unknown command: %s", argv[0]);
 		return (NULL);
 	}

 	optind = 1;
 	if (entry->parse == NULL) {
 		while ((opt = getopt(argc, argv, "")) != EOF) {
 			switch (opt) {
 			default:
 				goto usage;
 			}
 		}
 		argc -= optind;
 		argv += optind;
 		if (argc != 0)
 			goto usage;
 	}

 	cmd = xmalloc(sizeof *cmd);
 	cmd->entry = entry;
 	if (entry->parse != NULL) {
 		if (entry->parse(cmd, &cmd->data, 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);
 }

 void
 cmd_exec(struct cmd *cmd, struct cmd_ctx *ctx)
 {
 	cmd->entry->exec(cmd->data, 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->data, 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->data, b);
 	return (cmd);
 }

 void
 cmd_free(struct cmd *cmd)
 {
 	if (cmd->data != NULL && cmd->entry->free != NULL)
 		cmd->entry->free(cmd->data);
 	xfree(cmd);
 }

 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);
 }

 /*
  * Attempt to establish session. This looks first at the command-line argument
  * if any, then sees if there is a session in the context, then finally tries
  * the session data passed up from the client $TMUX variable.
  */
 struct session *
 cmd_find_session(struct cmd_ctx *ctx, const char *arg)
 {
 	struct session		*s;
 	struct msg_command_data	*data = ctx->msgdata;
 	u_int			 i, n;

 	if (arg != NULL) {
 		if ((s = session_find(arg)) == NULL) {
 			ctx->error(ctx, "session not found: %s", arg);
 			return (NULL);
 		}
 		return (s);
 	}

 	if (ctx->cursession != NULL)
 		return (ctx->cursession);

 	if (data != NULL && data->pid != -1) {
 		if (data->pid != getpid()) {
 			ctx->error(ctx, "wrong server: %lld", 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);
 	}

 	s = NULL;
 	n = 0;
 	for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
 		if (ARRAY_ITEM(&sessions, i) != NULL) {
 			s = ARRAY_ITEM(&sessions, i);
 			n++;
 		}
 	}
 	if (s == NULL) {
 		ctx->error(ctx, "no sessions found");
 		return (NULL);
 	}
 	if (n != 1) {
 		ctx->error(ctx, "multiple sessions and session not specified");
 		return (NULL);
 	}
 	return (s);
 }

 /*
  * Figure out the client. Try the current client (if any) first, then try to
  * figure it out from the argument.
  */
 struct client *
 cmd_find_client(unused struct cmd_ctx *ctx, const char *arg)
 {
 	struct client	*c;
 	u_int		 i;

 	if (ctx->curclient != NULL)
 		return (ctx->curclient);

 	if (arg == NULL) {
 		ctx->error(ctx, "must specify a client");
 		return (NULL);
 	}

 	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 		c = ARRAY_ITEM(&clients, i);
 		if (c != NULL && strcmp(arg, c->tty.path) == 0)
 			return (c);
 	}

 	ctx->error(ctx, "client not found: %s", arg);
 	return (NULL);
 }
	/* $Id: cmd.c,v 1.36 2008-06-02 21:08:36 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 <getopt.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_copy_mode_entry,
	&cmd_detach_client_entry,
	&cmd_has_session_entry,
	&cmd_kill_session_entry,
	&cmd_kill_window_entry,
	&cmd_last_window_entry,
	&cmd_link_window_entry,
	&cmd_list_clients_entry,
	&cmd_list_keys_entry,
	&cmd_list_sessions_entry,
	&cmd_list_windows_entry,
	&cmd_new_session_entry,
	&cmd_new_window_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_scroll_mode_entry,
	&cmd_select_window_entry,
	&cmd_send_keys_entry,
	&cmd_send_prefix_entry,
	&cmd_set_option_entry,
	&cmd_start_server_entry,
	&cmd_swap_window_entry,
	&cmd_switch_client_entry,
	&cmd_unbind_key_entry,
	&cmd_unlink_window_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;
	}
	if (entry == NULL) {
	xasprintf(cause, "unknown command: %s", argv[0]);
	return (NULL);
	}

	optind = 1;
	if (entry->parse == NULL) {
	while ((opt = getopt(argc, argv, "")) != EOF) {
	switch (opt) {
	default:
	goto usage;
	}
	}
	argc -= optind;
	argv += optind;
	if (argc != 0)
	goto usage;
	}

	cmd = xmalloc(sizeof *cmd);
	cmd->entry = entry;
	if (entry->parse != NULL) {
	if (entry->parse(cmd, &cmd->data, 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);
	}

	void
	cmd_exec(struct cmd cmd, struct cmd_ctx ctx)
	{
	cmd->entry->exec(cmd->data, 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->data, 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->data, b);
	return (cmd);
	}

	void
	cmd_free(struct cmd *cmd)
	{
	if (cmd->data != NULL && cmd->entry->free != NULL)
	cmd->entry->free(cmd->data);
	xfree(cmd);
	}

	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);
	}

	/*
	* Attempt to establish session. This looks first at the command-line argument
	* if any, then sees if there is a session in the context, then finally tries
	* the session data passed up from the client $TMUX variable.
	*/
	struct session *
	cmd_find_session(struct cmd_ctx ctx, const char arg)
	{
	struct session *s;
	struct msg_command_data *data = ctx->msgdata;
	u_int i, n;

	if (arg != NULL) {
	if ((s = session_find(arg)) == NULL) {
	ctx->error(ctx, "session not found: %s", arg);
	return (NULL);
	}
	return (s);
	}

	if (ctx->cursession != NULL)
	return (ctx->cursession);

	if (data != NULL && data->pid != -1) {
	if (data->pid != getpid()) {
	ctx->error(ctx, "wrong server: %lld", 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);
	}

	s = NULL;
	n = 0;
	for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
	if (ARRAY_ITEM(&sessions, i) != NULL) {
	s = ARRAY_ITEM(&sessions, i);
	n++;
	}
	}
	if (s == NULL) {
	ctx->error(ctx, "no sessions found");
	return (NULL);
	}
	if (n != 1) {
	ctx->error(ctx, "multiple sessions and session not specified");
	return (NULL);
	}
	return (s);
	}

	/*
	* Figure out the client. Try the current client (if any) first, then try to
	* figure it out from the argument.
	*/
	struct client *
	cmd_find_client(unused struct cmd_ctx ctx, const char arg)
	{
	struct client *c;
	u_int i;

	if (ctx->curclient != NULL)
	return (ctx->curclient);

	if (arg == NULL) {
	ctx->error(ctx, "must specify a client");
	return (NULL);
	}

	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
	c = ARRAY_ITEM(&clients, i);
	if (c != NULL && strcmp(arg, c->tty.path) == 0)
	return (c);
	}

	ctx->error(ctx, "client not found: %s", arg);
	return (NULL);
	}