tmux/cmd.c

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/* $OpenBSD$ */
/*
* 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 <fnmatch.h>
#include <paths.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_clear_history_entry,
&cmd_clock_mode_entry,
&cmd_command_prompt_entry,
&cmd_confirm_before_entry,
&cmd_copy_buffer_entry,
&cmd_copy_mode_entry,
&cmd_delete_buffer_entry,
&cmd_detach_client_entry,
&cmd_display_message_entry,
&cmd_down_pane_entry,
&cmd_find_window_entry,
&cmd_has_session_entry,
&cmd_if_shell_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_layout_entry,
&cmd_previous_window_entry,
&cmd_refresh_client_entry,
&cmd_rename_session_entry,
&cmd_rename_window_entry,
&cmd_resize_pane_entry,
&cmd_respawn_window_entry,
&cmd_rotate_window_entry,
&cmd_save_buffer_entry,
&cmd_scroll_mode_entry,
&cmd_select_layout_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 session *cmd_newest_session(void);
struct client *cmd_lookup_client(const char *);
struct session *cmd_lookup_session(const char *, int *);
struct winlink *cmd_lookup_window(struct session *, const char *, int *);
struct cmd *
cmd_parse(int argc, char **argv, char **cause)
{
const struct cmd_entry **entryp, *entry;
struct cmd *cmd;
char s[BUFSIZ];
int opt, ambiguous = 0;
*cause = NULL;
if (argc == 0) {
xasprintf(cause, "no command");
return (NULL);
}
entry = NULL;
for (entryp = cmd_table; *entryp != NULL; entryp++) {
if ((*entryp)->alias != NULL &&
strcmp((*entryp)->alias, argv[0]) == 0) {
ambiguous = 0;
entry = *entryp;
break;
}
if (strncmp((*entryp)->name, argv[0], strlen(argv[0])) != 0)
continue;
if (entry != NULL)
ambiguous = 1;
entry = *entryp;
/* Bail now if an exact match. */
if (strcmp(entry->name, argv[0]) == 0)
break;
}
if (ambiguous)
goto ambiguous;
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);
}
/*
* Figure out the current session. Use: 1) the current session, if the command
* context has one; 2) the session specified in the TMUX variable from the
* environment (as passed from the client); 3) the newest session.
*/
struct session *
cmd_current_session(struct cmd_ctx *ctx)
{
struct msg_command_data *data = ctx->msgdata;
struct session *s;
if (ctx->cursession != NULL)
return (ctx->cursession);
if (data != NULL && data->pid != -1) {
if (data->pid != getpid())
return (NULL);
if (data->idx > ARRAY_LENGTH(&sessions))
return (NULL);
if ((s = ARRAY_ITEM(&sessions, data->idx)) == NULL)
return (NULL);
return (s);
}
return (cmd_newest_session());
}
/* Find the newest session. */
struct session *
cmd_newest_session(void)
{
struct session *s, *snewest;
struct timeval *tv = NULL;
u_int i;
snewest = NULL;
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
if ((s = ARRAY_ITEM(&sessions, i)) == NULL)
continue;
if (tv == NULL || timercmp(&s->tv, tv, >)) {
snewest = s;
tv = &s->tv;
}
}
return (snewest);
}
/* Find the target client or report an error and return NULL. */
struct client *
cmd_find_client(struct cmd_ctx *ctx, const char *arg)
{
struct client *c;
char *tmparg;
size_t arglen;
/* A NULL argument means the current client. */
if (arg == NULL)
return (ctx->curclient);
tmparg = xstrdup(arg);
/* Trim a single trailing colon if any. */
arglen = strlen(tmparg);
if (arglen != 0 && tmparg[arglen - 1] == ':')
tmparg[arglen - 1] = '\0';
/* Find the client, if any. */
c = cmd_lookup_client(tmparg);
/* If no client found, report an error. */
if (c == NULL)
ctx->error(ctx, "client not found: %s", tmparg);
xfree(tmparg);
return (c);
}
/*
* Lookup a client by device path. Either of a full match and a match without a
* leading _PATH_DEV ("/dev/") is accepted.
*/
struct client *
cmd_lookup_client(const char *name)
{
struct client *c;
const char *path;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
if ((c = ARRAY_ITEM(&clients, i)) == NULL)
continue;
path = c->tty.path;
/* Check for exact matches. */
if (strcmp(name, path) == 0)
return (c);
/* Check without leading /dev if present. */
if (strncmp(path, _PATH_DEV, (sizeof _PATH_DEV) - 1) != 0)
continue;
if (strcmp(name, path + (sizeof _PATH_DEV) - 1) == 0)
return (c);
}
return (NULL);
}
/* Lookup a session by name. If no session is found, NULL is returned. */
struct session *
cmd_lookup_session(const char *name, int *ambiguous)
{
struct session *s, *sfound;
u_int i;
*ambiguous = 0;
/*
* Look for matches. Session names must be unique so an exact match
* can't be ambigious and can just be returned.
*/
sfound = NULL;
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
if ((s = ARRAY_ITEM(&sessions, i)) == NULL)
continue;
/* Check for an exact match and return it if found. */
if (strcmp(name, s->name) == 0)
return (s);
/* Then check for pattern matches. */
if (strncmp(name, s->name, strlen(name)) == 0 ||
fnmatch(name, s->name, 0) == 0) {
if (sfound != NULL) {
*ambiguous = 1;
return (NULL);
}
sfound = s;
}
}
return (sfound);
}
/*
* Lookup a window or return -1 if not found or ambigious. First try as an index
* and if invalid, use fnmatch or leading prefix.
*/
struct winlink *
cmd_lookup_window(struct session *s, const char *name, int *ambiguous)
{
struct winlink *wl, *wlfound;
struct window *w;
const char *errstr;
u_int idx;
*ambiguous = 0;
/* First see if this is a valid window index in this session. */
idx = strtonum(name, 0, INT_MAX, &errstr);
if (errstr == NULL) {
if ((wl = winlink_find_by_index(&s->windows, idx)) != NULL)
return (wl);
}
/* Look for exact matches, error if more than one. */
wlfound = NULL;
RB_FOREACH(wl, winlinks, &s->windows) {
w = wl->window;
if (strcmp(name, w->name) == 0) {
if (wlfound != NULL) {
*ambiguous = 1;
return (NULL);
}
wlfound = wl;
}
}
if (wlfound != NULL)
return (wlfound);
/* Now look for pattern matches, again error if multiple. */
wlfound = NULL;
RB_FOREACH(wl, winlinks, &s->windows) {
w = wl->window;
if (strncmp(name, w->name, strlen(name)) == 0 ||
fnmatch(name, w->name, 0) == 0) {
if (wlfound != NULL) {
*ambiguous = 1;
return (NULL);
}
wlfound = wl;
}
}
if (wlfound != NULL)
return (wlfound);
return (NULL);
}
/* Find the target session or report an error and return NULL. */
struct session *
cmd_find_session(struct cmd_ctx *ctx, const char *arg)
{
struct session *s;
struct client *c;
char *tmparg;
size_t arglen;
int ambiguous;
/* A NULL argument means the current session. */
if (arg == NULL)
return (cmd_current_session(ctx));
tmparg = xstrdup(arg);
/* Trim a single trailing colon if any. */
arglen = strlen(tmparg);
if (arglen != 0 && tmparg[arglen - 1] == ':')
tmparg[arglen - 1] = '\0';
/* Find the session, if any. */
s = cmd_lookup_session(tmparg, &ambiguous);
/* If it doesn't, try to match it as a client. */
if (s == NULL && (c = cmd_lookup_client(tmparg)) != NULL)
s = c->session;
/* If no session found, report an error. */
if (s == NULL) {
if (ambiguous)
ctx->error(ctx, "more than one session: %s", tmparg);
else
ctx->error(ctx, "session not found: %s", tmparg);
}
xfree(tmparg);
return (s);
}
/* Find the target session and window or report an error and return NULL. */
struct winlink *
cmd_find_window(struct cmd_ctx *ctx, const char *arg, struct session **sp)
{
struct session *s;
struct winlink *wl;
const char *winptr;
char *sessptr = NULL;
int ambiguous = 0;
/*
* Find the current session. There must always be a current session, if
* it can't be found, report an error.
*/
if ((s = cmd_current_session(ctx)) == NULL) {
ctx->error(ctx, "can't establish current session");
return (NULL);
}
/* A NULL argument means the current session and window. */
if (arg == NULL) {
if (sp != NULL)
*sp = s;
return (s->curw);
}
/* Time to look at the argument. If it is empty, that is an error. */
if (*arg == '\0')
goto not_found;
/* Find the separating colon. If none, assume the current session. */
winptr = strchr(arg, ':');
if (winptr == NULL)
winptr = xstrdup(arg);
else {
winptr++; /* skip : */
sessptr = xstrdup(arg);
*strchr(sessptr, ':') = '\0';
}
log_debug("%s: winptr=%s, sessptr=%s", __func__, winptr, sessptr);
/* Try to lookup the session if present. */
if (sessptr != NULL && *sessptr != '\0') {
if ((s = cmd_lookup_session(sessptr, &ambiguous)) == NULL)
goto no_session;
}
if (sp != NULL)
*sp = s;
/*
* Then work out the window. An empty string is the current window,
* otherwise try to look it up in the session.
*/
if (winptr == NULL || *winptr == '\0')
wl = s->curw;
else if ((wl = cmd_lookup_window(s, winptr, &ambiguous)) == NULL)
goto not_found;
if (sessptr != NULL)
xfree(sessptr);
return (wl);
no_session:
if (ambiguous)
ctx->error(ctx, "multiple sessions: %s", sessptr);
else
ctx->error(ctx, "session not found: %s", sessptr);
if (sessptr != NULL)
xfree(sessptr);
return (NULL);
not_found:
if (ambiguous)
ctx->error(ctx, "multiple windows: %s", arg);
else
ctx->error(ctx, "window not found: %s", arg);
if (sessptr != NULL)
xfree(sessptr);
return (NULL);
}
/*
* Find the target session and window index, whether or not it exists in the
* session. Return -2 on error or -1 if no window index is specified. This is
* used when parsing an argument for a window target that may not be exist (for
* example it is going to be created).
*/
int
cmd_find_index(struct cmd_ctx *ctx, const char *arg, struct session **sp)
{
struct session *s;
struct winlink *wl;
const char *winptr, *errstr;
char *sessptr = NULL;
int idx, ambiguous = 0;
/*
* Find the current session. There must always be a current session, if
* it can't be found, report an error.
*/
if ((s = cmd_current_session(ctx)) == NULL) {
ctx->error(ctx, "can't establish current session");
return (-1);
}
/* A NULL argument means the current session and "no window" (-1). */
if (arg == NULL) {
if (sp != NULL)
*sp = s;
return (-1);
}
/* Time to look at the argument. If it is empty, that is an error. */
if (*arg == '\0')
goto not_found;
/* Find the separating colon. If none, assume the current session. */
winptr = strchr(arg, ':');
if (winptr == NULL)
winptr = xstrdup(arg);
else {
winptr++; /* skip : */
sessptr = xstrdup(arg);
*strchr(sessptr, ':') = '\0';
}
log_debug("%s: winptr=%s, sessptr=%s", __func__, winptr, sessptr);
/* Try to lookup the session if present. */
if (sessptr != NULL && *sessptr != '\0') {
if ((s = cmd_lookup_session(sessptr, &ambiguous)) == NULL)
goto no_session;
}
if (sp != NULL)
*sp = s;
/*
* Then work out the window. No : means "no window" (-1), an empty
* string is the current window, otherwise try to look it up in the
* session.
*/
if (winptr == NULL)
idx = -1;
else if (*winptr == '\0')
idx = s->curw->idx;
else if ((wl = cmd_lookup_window(s, winptr, &ambiguous)) == NULL) {
if (ambiguous)
goto not_found;
/* Don't care it doesn't exist if this is a valid index. */
idx = strtonum(winptr, 0, INT_MAX, &errstr);
if (errstr != NULL) {
ctx->error(ctx, "index %s: %s", errstr, winptr);
idx = -2;
}
} else
idx = wl->idx;
if (sessptr != NULL)
xfree(sessptr);
return (idx);
no_session:
if (ambiguous)
ctx->error(ctx, "multiple sessions: %s", sessptr);
else
ctx->error(ctx, "session not found: %s", sessptr);
if (sessptr != NULL)
xfree(sessptr);
return (-2);
not_found:
if (ambiguous)
ctx->error(ctx, "multiple windows: %s", arg);
else
ctx->error(ctx, "window not found: %s", arg);
if (sessptr != NULL)
xfree(sessptr);
return (-2);
}