mirror of
https://github.com/tmux/tmux.git
synced 2024-12-13 01:48:47 +00:00
084d07f4eb
and some people may use shells which do not support it. Instead, make an empty default-command option mean a login shell, and fork it with a - in argv[0] which is the method used by login(1). Also fix the automatic-rename code to handle this correctly and to strip a leading - if present.
630 lines
12 KiB
C
630 lines
12 KiB
C
/* $OpenBSD$ */
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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/ioctl.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fnmatch.h>
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#include <paths.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include <util.h>
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#include "tmux.h"
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/*
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* Each window is attached to one or two panes, each of which is a pty. This
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* file contains code to handle them.
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*
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* A pane has two buffers attached, these are filled and emptied by the main
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* server poll loop. Output data is received from pty's in screen format,
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* translated and returned as a series of escape sequences and strings via
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* input_parse (in input.c). Input data is received as key codes and written
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* directly via input_key.
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*
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* Each pane also has a "virtual" screen (screen.c) which contains the current
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* state and is redisplayed when the window is reattached to a client.
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*
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* Windows are stored directly on a global array and wrapped in any number of
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* winlink structs to be linked onto local session RB trees. A reference count
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* is maintained and a window removed from the global list and destroyed when
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* it reaches zero.
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*/
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/* Global window list. */
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struct windows windows;
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RB_GENERATE(winlinks, winlink, entry, winlink_cmp);
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const char *
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window_default_command(void)
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{
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const char *shell;
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struct passwd *pw;
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shell = getenv("SHELL");
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if (shell != NULL && *shell != '\0')
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return (shell);
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pw = getpwuid(getuid());
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if (pw != NULL && pw->pw_shell != NULL && *pw->pw_shell != '\0')
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return (pw->pw_shell);
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return (_PATH_BSHELL);
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}
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int
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winlink_cmp(struct winlink *wl1, struct winlink *wl2)
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{
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return (wl1->idx - wl2->idx);
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}
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struct winlink *
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winlink_find_by_index(struct winlinks *wwl, int idx)
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{
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struct winlink wl;
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if (idx < 0)
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fatalx("bad index");
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wl.idx = idx;
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return (RB_FIND(winlinks, wwl, &wl));
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}
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int
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winlink_next_index(struct winlinks *wwl)
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{
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u_int i;
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for (i = 0; i < INT_MAX; i++) {
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if (winlink_find_by_index(wwl, i) == NULL)
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return (i);
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}
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fatalx("no free indexes");
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}
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u_int
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winlink_count(struct winlinks *wwl)
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{
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struct winlink *wl;
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u_int n;
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n = 0;
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RB_FOREACH(wl, winlinks, wwl)
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n++;
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return (n);
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}
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struct winlink *
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winlink_add(struct winlinks *wwl, struct window *w, int idx)
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{
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struct winlink *wl;
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if (idx == -1)
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idx = winlink_next_index(wwl);
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else if (winlink_find_by_index(wwl, idx) != NULL)
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return (NULL);
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if (idx < 0)
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fatalx("bad index");
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wl = xcalloc(1, sizeof *wl);
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wl->idx = idx;
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wl->window = w;
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RB_INSERT(winlinks, wwl, wl);
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w->references++;
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return (wl);
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}
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void
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winlink_remove(struct winlinks *wwl, struct winlink *wl)
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{
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struct window *w = wl->window;
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RB_REMOVE(winlinks, wwl, wl);
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xfree(wl);
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if (w->references == 0)
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fatal("bad reference count");
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w->references--;
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if (w->references == 0)
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window_destroy(w);
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}
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struct winlink *
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winlink_next(unused struct winlinks *wwl, struct winlink *wl)
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{
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return (RB_NEXT(winlinks, wwl, wl));
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}
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struct winlink *
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winlink_previous(unused struct winlinks *wwl, struct winlink *wl)
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{
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return (RB_PREV(winlinks, wwl, wl));
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}
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void
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winlink_stack_push(struct winlink_stack *stack, struct winlink *wl)
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{
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if (wl == NULL)
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return;
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winlink_stack_remove(stack, wl);
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SLIST_INSERT_HEAD(stack, wl, sentry);
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}
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void
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winlink_stack_remove(struct winlink_stack *stack, struct winlink *wl)
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{
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struct winlink *wl2;
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if (wl == NULL)
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return;
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SLIST_FOREACH(wl2, stack, sentry) {
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if (wl2 == wl) {
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SLIST_REMOVE(stack, wl, winlink, sentry);
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return;
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}
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}
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}
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int
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window_index(struct window *s, u_int *i)
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{
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for (*i = 0; *i < ARRAY_LENGTH(&windows); (*i)++) {
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if (s == ARRAY_ITEM(&windows, *i))
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return (0);
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}
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return (-1);
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}
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struct window *
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window_create1(u_int sx, u_int sy)
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{
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struct window *w;
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u_int i;
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w = xmalloc(sizeof *w);
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w->name = NULL;
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w->flags = 0;
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TAILQ_INIT(&w->panes);
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w->active = NULL;
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w->layout = 0;
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w->sx = sx;
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w->sy = sy;
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options_init(&w->options, &global_w_options);
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for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
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if (ARRAY_ITEM(&windows, i) == NULL) {
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ARRAY_SET(&windows, i, w);
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break;
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}
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}
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if (i == ARRAY_LENGTH(&windows))
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ARRAY_ADD(&windows, w);
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w->references = 0;
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return (w);
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}
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struct window *
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window_create(const char *name, const char *cmd, const char *cwd,
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const char **envp, u_int sx, u_int sy, u_int hlimit, char **cause)
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{
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struct window *w;
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w = window_create1(sx, sy);
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if (window_add_pane(w, -1, cmd, cwd, envp, hlimit, cause) == NULL) {
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window_destroy(w);
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return (NULL);
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}
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w->active = TAILQ_FIRST(&w->panes);
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if (name != NULL) {
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w->name = xstrdup(name);
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options_set_number(&w->options, "automatic-rename", 0);
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} else
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w->name = default_window_name(w);
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return (w);
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}
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void
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window_destroy(struct window *w)
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{
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u_int i;
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if (window_index(w, &i) != 0)
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fatalx("index not found");
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ARRAY_SET(&windows, i, NULL);
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while (!ARRAY_EMPTY(&windows) && ARRAY_LAST(&windows) == NULL)
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ARRAY_TRUNC(&windows, 1);
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options_free(&w->options);
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window_destroy_panes(w);
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if (w->name != NULL)
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xfree(w->name);
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xfree(w);
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}
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int
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window_resize(struct window *w, u_int sx, u_int sy)
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{
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w->sx = sx;
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w->sy = sy;
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return (0);
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}
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void
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window_set_active_pane(struct window *w, struct window_pane *wp)
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{
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w->active = wp;
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while (w->active->flags & PANE_HIDDEN)
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w->active = TAILQ_PREV(w->active, window_panes, entry);
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}
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struct window_pane *
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window_add_pane(struct window *w, int wanty, const char *cmd,
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const char *cwd, const char **envp, u_int hlimit, char **cause)
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{
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struct window_pane *wp;
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u_int sizey;
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if (TAILQ_EMPTY(&w->panes))
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wanty = w->sy;
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else {
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sizey = w->active->sy - 1; /* for separator */
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if (sizey < PANE_MINIMUM * 2) {
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*cause = xstrdup("pane too small");
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return (NULL);
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}
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if (wanty == -1)
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wanty = sizey / 2;
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if (wanty < PANE_MINIMUM)
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wanty = PANE_MINIMUM;
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if ((u_int) wanty > sizey - PANE_MINIMUM)
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wanty = sizey - PANE_MINIMUM;
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window_pane_resize(w->active, w->sx, sizey - wanty);
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}
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wp = window_pane_create(w, w->sx, wanty, hlimit);
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if (TAILQ_EMPTY(&w->panes))
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TAILQ_INSERT_HEAD(&w->panes, wp, entry);
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else
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TAILQ_INSERT_AFTER(&w->panes, w->active, wp, entry);
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if (window_pane_spawn(wp, cmd, cwd, envp, cause) != 0) {
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window_remove_pane(w, wp);
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return (NULL);
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}
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return (wp);
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}
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void
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window_remove_pane(struct window *w, struct window_pane *wp)
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{
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w->active = TAILQ_PREV(wp, window_panes, entry);
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if (w->active == NULL)
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w->active = TAILQ_NEXT(wp, entry);
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TAILQ_REMOVE(&w->panes, wp, entry);
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window_pane_destroy(wp);
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}
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struct window_pane *
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window_pane_at_index(struct window *w, u_int idx)
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{
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struct window_pane *wp;
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u_int n;
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n = 0;
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TAILQ_FOREACH(wp, &w->panes, entry) {
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if (n == idx)
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return (wp);
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n++;
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}
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return (NULL);
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}
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u_int
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window_count_panes(struct window *w)
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{
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struct window_pane *wp;
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u_int n;
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n = 0;
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TAILQ_FOREACH(wp, &w->panes, entry)
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n++;
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return (n);
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}
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void
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window_destroy_panes(struct window *w)
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{
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struct window_pane *wp;
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while (!TAILQ_EMPTY(&w->panes)) {
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wp = TAILQ_FIRST(&w->panes);
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TAILQ_REMOVE(&w->panes, wp, entry);
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window_pane_destroy(wp);
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}
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}
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struct window_pane *
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window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
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{
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struct window_pane *wp;
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wp = xcalloc(1, sizeof *wp);
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wp->window = w;
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wp->cmd = NULL;
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wp->cwd = NULL;
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wp->fd = -1;
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wp->in = buffer_create(BUFSIZ);
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wp->out = buffer_create(BUFSIZ);
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wp->mode = NULL;
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wp->xoff = 0;
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wp->yoff = 0;
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wp->sx = sx;
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wp->sy = sy;
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screen_init(&wp->base, sx, sy, hlimit);
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wp->screen = &wp->base;
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input_init(wp);
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return (wp);
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}
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void
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window_pane_destroy(struct window_pane *wp)
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{
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if (wp->fd != -1)
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close(wp->fd);
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input_free(wp);
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window_pane_reset_mode(wp);
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screen_free(&wp->base);
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buffer_destroy(wp->in);
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buffer_destroy(wp->out);
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if (wp->cwd != NULL)
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xfree(wp->cwd);
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if (wp->cmd != NULL)
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xfree(wp->cmd);
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xfree(wp);
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}
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int
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window_pane_spawn(struct window_pane *wp,
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const char *cmd, const char *cwd, const char **envp, char **cause)
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{
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struct winsize ws;
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int mode;
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const char **envq, *ptr;
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char *argv0;
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struct timeval tv;
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if (wp->fd != -1)
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close(wp->fd);
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if (cmd != NULL) {
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if (wp->cmd != NULL)
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xfree(wp->cmd);
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wp->cmd = xstrdup(cmd);
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}
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if (cwd != NULL) {
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if (wp->cwd != NULL)
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xfree(wp->cwd);
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wp->cwd = xstrdup(cwd);
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}
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memset(&ws, 0, sizeof ws);
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ws.ws_col = screen_size_x(&wp->base);
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ws.ws_row = screen_size_y(&wp->base);
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if (gettimeofday(&wp->window->name_timer, NULL) != 0)
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fatal("gettimeofday");
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tv.tv_sec = 0;
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tv.tv_usec = NAME_INTERVAL * 1000L;
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timeradd(&wp->window->name_timer, &tv, &wp->window->name_timer);
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switch (wp->pid = forkpty(&wp->fd, wp->tty, NULL, &ws)) {
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case -1:
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wp->fd = -1;
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xasprintf(cause, "%s: %s", cmd, strerror(errno));
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return (-1);
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case 0:
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if (chdir(wp->cwd) != 0)
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chdir("/");
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for (envq = envp; *envq != NULL; envq++) {
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if (putenv(xstrdup(*envq)) != 0)
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fatal("putenv failed");
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}
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sigreset();
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log_close();
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if (*wp->cmd != '\0') {
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execl(_PATH_BSHELL, "sh", "-c", wp->cmd, (char *) NULL);
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fatal("execl failed");
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}
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/* No command; fork a login shell. */
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cmd = window_default_command();
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if ((ptr = strrchr(cmd, '/')) != NULL && *(ptr + 1) != '\0')
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xasprintf(&argv0, "-%s", ptr + 1);
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else
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xasprintf(&argv0, "-%s", cmd);
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execl(cmd, argv0, (char *) NULL);
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fatal("execl failed");
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}
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if ((mode = fcntl(wp->fd, F_GETFL)) == -1)
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fatal("fcntl failed");
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if (fcntl(wp->fd, F_SETFL, mode|O_NONBLOCK) == -1)
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fatal("fcntl failed");
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if (fcntl(wp->fd, F_SETFD, FD_CLOEXEC) == -1)
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fatal("fcntl failed");
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return (0);
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}
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int
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window_pane_resize(struct window_pane *wp, u_int sx, u_int sy)
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{
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struct winsize ws;
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if (sx == wp->sx && sy == wp->sy)
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return (-1);
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wp->sx = sx;
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wp->sy = sy;
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memset(&ws, 0, sizeof ws);
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ws.ws_col = sx;
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ws.ws_row = sy;
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screen_resize(&wp->base, sx, sy);
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if (wp->mode != NULL)
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wp->mode->resize(wp, sx, sy);
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if (wp->fd != -1 && ioctl(wp->fd, TIOCSWINSZ, &ws) == -1)
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fatal("ioctl failed");
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return (0);
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}
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int
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window_pane_set_mode(struct window_pane *wp, const struct window_mode *mode)
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{
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struct screen *s;
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if (wp->mode != NULL || wp->mode == mode)
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return (1);
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wp->mode = mode;
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if ((s = wp->mode->init(wp)) != NULL)
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wp->screen = s;
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server_redraw_window(wp->window);
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return (0);
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}
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void
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window_pane_reset_mode(struct window_pane *wp)
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{
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if (wp->mode == NULL)
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return;
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wp->mode->free(wp);
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wp->mode = NULL;
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wp->screen = &wp->base;
|
|
server_redraw_window(wp->window);
|
|
}
|
|
|
|
void
|
|
window_pane_parse(struct window_pane *wp)
|
|
{
|
|
input_parse(wp);
|
|
}
|
|
|
|
void
|
|
window_pane_key(struct window_pane *wp, struct client *c, int key)
|
|
{
|
|
if (wp->fd == -1)
|
|
return;
|
|
|
|
if (wp->mode != NULL) {
|
|
if (wp->mode->key != NULL)
|
|
wp->mode->key(wp, c, key);
|
|
} else
|
|
input_key(wp, key);
|
|
}
|
|
|
|
void
|
|
window_pane_mouse(
|
|
struct window_pane *wp, struct client *c, u_char b, u_char x, u_char y)
|
|
{
|
|
if (wp->fd == -1)
|
|
return;
|
|
|
|
/* XXX convert from 1-based? */
|
|
|
|
if (x < wp->xoff || x >= wp->xoff + wp->sx)
|
|
return;
|
|
if (y < wp->yoff || y >= wp->yoff + wp->sy)
|
|
return;
|
|
x -= wp->xoff;
|
|
y -= wp->yoff;
|
|
|
|
if (wp->mode != NULL) {
|
|
if (wp->mode->mouse != NULL)
|
|
wp->mode->mouse(wp, c, b, x, y);
|
|
} else
|
|
input_mouse(wp, b, x, y);
|
|
}
|
|
|
|
char *
|
|
window_pane_search(struct window_pane *wp, const char *searchstr, u_int *lineno)
|
|
{
|
|
struct screen *s = &wp->base;
|
|
char *newsearchstr, *line, *msg;
|
|
u_int i;
|
|
|
|
msg = NULL;
|
|
xasprintf(&newsearchstr, "*%s*", searchstr);
|
|
|
|
for (i = 0; i < screen_size_y(s); i++) {
|
|
line = grid_view_string_cells(s->grid, 0, i, screen_size_x(s));
|
|
if (fnmatch(newsearchstr, line, 0) == 0) {
|
|
msg = line;
|
|
if (lineno != NULL)
|
|
*lineno = i;
|
|
break;
|
|
}
|
|
xfree(line);
|
|
}
|
|
|
|
xfree(newsearchstr);
|
|
return (msg);
|
|
}
|