cmd-new-session.c

   1 /* $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  15  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <sys/types.h>
  20
  21 #include <errno.h>
  22 #include <fcntl.h>
  23 #include <pwd.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <termios.h>
  27 #include <unistd.h>
  28
  29 #include "tmux.h"
  30
  31 /*
  32  * Create a new session and attach to the current terminal unless -d is given.
  33  */
  34
  35 enum cmd_retval  cmd_new_session_exec(struct cmd *, struct cmd_q *);
  36
  37 const struct cmd_entry cmd_new_session_entry = {
  38         "new-session", "new",
  39         "Ac:dDF:n:Ps:t:x:y:", 0, 1,
  40         "[-AdDP] [-c start-directory] [-F format] [-n window-name] "
  41         "[-s session-name] " CMD_TARGET_SESSION_USAGE " [-x width] [-y height] "
  42         "[command]",
  43         CMD_STARTSERVER|CMD_CANTNEST,
  44         NULL,
  45         cmd_new_session_exec
  46 };
  47
  48 enum cmd_retval
  49 cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq)
  50 {
  51         struct args             *args = self->args;
  52         struct client           *c = cmdq->client, *c0;
  53         struct session          *s, *groupwith;
  54         struct window           *w;
  55         struct environ           env;
  56         struct termios           tio, *tiop;
  57         const char              *newname, *target, *update, *errstr, *template;
  58         char                    *cmd, *cause, *cp;
  59         int                      detached, already_attached, idx, cwd, fd = -1;
  60         u_int                    sx, sy;
  61         struct format_tree      *ft;
  62
  63         if (args_has(args, 't') && (args->argc != 0 || args_has(args, 'n'))) {
  64                 cmdq_error(cmdq, "command or window name given with target");
  65                 return (CMD_RETURN_ERROR);
  66         }
  67
  68         newname = args_get(args, 's');
  69         if (newname != NULL) {
  70                 if (!session_check_name(newname)) {
  71                         cmdq_error(cmdq, "bad session name: %s", newname);
  72                         return (CMD_RETURN_ERROR);
  73                 }
  74                 if (session_find(newname) != NULL) {
  75                         if (args_has(args, 'A')) {
  76                                 return (cmd_attach_session(cmdq, newname,
  77                                     args_has(args, 'D'), 0, NULL));
  78                         }
  79                         cmdq_error(cmdq, "duplicate session: %s", newname);
  80                         return (CMD_RETURN_ERROR);
  81                 }
  82         }
  83
  84         target = args_get(args, 't');
  85         if (target != NULL) {
  86                 groupwith = cmd_find_session(cmdq, target, 0);
  87                 if (groupwith == NULL)
  88                         return (CMD_RETURN_ERROR);
  89         } else
  90                 groupwith = NULL;
  91
  92         /* Set -d if no client. */
  93         detached = args_has(args, 'd');
  94         if (c == NULL)
  95                 detached = 1;
  96
  97         /* Is this client already attached? */
  98         already_attached = 0;
  99         if (c != NULL && c->session != NULL)
 100                 already_attached = 1;
 101
 102         /* Get the new session working directory. */
 103         if (args_has(args, 'c')) {
 104                 ft = format_create();
 105                 if ((c0 = cmd_find_client(cmdq, NULL, 1)) != NULL)
 106                         format_client(ft, c0);
 107                 cp = format_expand(ft, args_get(args, 'c'));
 108                 format_free(ft);
 109
 110                 fd = open(cp, O_RDONLY|O_DIRECTORY);
 111                 free(cp);
 112                 if (fd == -1) {
 113                         cmdq_error(cmdq, "bad working directory: %s",
 114                             strerror(errno));
 115                         return (CMD_RETURN_ERROR);
 116                 }
 117                 cwd = fd;
 118         } else if (c->session == NULL)
 119                 cwd = c->cwd;
 120         else if ((c0 = cmd_current_client(cmdq)) != NULL)
 121                 cwd = c0->session->cwd;
 122         else {
 123                 fd = open(".", O_RDONLY);
 124                 cwd = fd;
 125         }
 126
 127         /*
 128          * Save the termios settings, part of which is used for new windows in
 129          * this session.
 130          *
 131          * This is read again with tcgetattr() rather than using tty.tio as if
 132          * detached, tty_open won't be called. Because of this, it must be done
 133          * before opening the terminal as that calls tcsetattr() to prepare for
 134          * tmux taking over.
 135          */
 136         if (!detached && !already_attached && c->tty.fd != -1) {
 137                 if (tcgetattr(c->tty.fd, &tio) != 0)
 138                         fatal("tcgetattr failed");
 139                 tiop = &tio;
 140         } else
 141                 tiop = NULL;
 142
 143         /* Open the terminal if necessary. */
 144         if (!detached && !already_attached) {
 145                 if (server_client_open(c, NULL, &cause) != 0) {
 146                         cmdq_error(cmdq, "open terminal failed: %s", cause);
 147                         free(cause);
 148                         goto error;
 149                 }
 150         }
 151
 152         /* Find new session size. */
 153         if (c != NULL) {
 154                 sx = c->tty.sx;
 155                 sy = c->tty.sy;
 156         } else {
 157                 sx = 80;
 158                 sy = 24;
 159         }
 160         if (detached && args_has(args, 'x')) {
 161                 sx = strtonum(args_get(args, 'x'), 1, USHRT_MAX, &errstr);
 162                 if (errstr != NULL) {
 163                         cmdq_error(cmdq, "width %s", errstr);
 164                         goto error;
 165                 }
 166         }
 167         if (detached && args_has(args, 'y')) {
 168                 sy = strtonum(args_get(args, 'y'), 1, USHRT_MAX, &errstr);
 169                 if (errstr != NULL) {
 170                         cmdq_error(cmdq, "height %s", errstr);
 171                         goto error;
 172                 }
 173         }
 174         if (sy > 0 && options_get_number(&global_s_options, "status"))
 175                 sy--;
 176         if (sx == 0)
 177                 sx = 1;
 178         if (sy == 0)
 179                 sy = 1;
 180
 181         /* Figure out the command for the new window. */
 182         if (target != NULL)
 183                 cmd = NULL;
 184         else if (args->argc != 0)
 185                 cmd = args->argv[0];
 186         else
 187                 cmd = options_get_string(&global_s_options, "default-command");
 188
 189         /* Construct the environment. */
 190         environ_init(&env);
 191         update = options_get_string(&global_s_options, "update-environment");
 192         if (c != NULL)
 193                 environ_update(update, &c->environ, &env);
 194
 195         /* Create the new session. */
 196         idx = -1 - options_get_number(&global_s_options, "base-index");
 197         s = session_create(newname, cmd, cwd, &env, tiop, idx, sx, sy, &cause);
 198         if (s == NULL) {
 199                 cmdq_error(cmdq, "create session failed: %s", cause);
 200                 free(cause);
 201                 goto error;
 202         }
 203         environ_free(&env);
 204
 205         /* Set the initial window name if one given. */
 206         if (cmd != NULL && args_has(args, 'n')) {
 207                 w = s->curw->window;
 208                 window_set_name(w, args_get(args, 'n'));
 209                 options_set_number(&w->options, "automatic-rename", 0);
 210         }
 211
 212         /*
 213          * If a target session is given, this is to be part of a session group,
 214          * so add it to the group and synchronize.
 215          */
 216         if (groupwith != NULL) {
 217                 session_group_add(groupwith, s);
 218                 session_group_synchronize_to(s);
 219                 session_select(s, RB_ROOT(&s->windows)->idx);
 220         }
 221
 222         /*
 223          * Set the client to the new session. If a command client exists, it is
 224          * taking this session and needs to get MSG_READY and stay around.
 225          */
 226         if (!detached) {
 227                 if (!already_attached)
 228                         server_write_ready(c);
 229                 else if (c->session != NULL)
 230                         c->last_session = c->session;
 231                 c->session = s;
 232                 notify_attached_session_changed(c);
 233                 session_update_activity(s);
 234                 server_redraw_client(c);
 235         }
 236         recalculate_sizes();
 237         server_update_socket();
 238
 239         /*
 240          * If there are still configuration file errors to display, put the new
 241          * session's current window into more mode and display them now.
 242          */
 243         if (cfg_finished)
 244                 cfg_show_causes(s);
 245
 246         /* Print if requested. */
 247         if (args_has(args, 'P')) {
 248                 if ((template = args_get(args, 'F')) == NULL)
 249                         template = NEW_SESSION_TEMPLATE;
 250
 251                 ft = format_create();
 252                 if ((c0 = cmd_find_client(cmdq, NULL, 1)) != NULL)
 253                         format_client(ft, c0);
 254                 format_session(ft, s);
 255
 256                 cp = format_expand(ft, template);
 257                 cmdq_print(cmdq, "%s", cp);
 258                 free(cp);
 259
 260                 format_free(ft);
 261         }
 262
 263         if (!detached)
 264                 cmdq->client_exit = 0;
 265
 266         if (fd != -1)
 267                 close(fd);
 268         return (CMD_RETURN_NORMAL);
 269
 270 error:
 271         if (fd != -1)
 272                 close(fd);
 273         return (CMD_RETURN_ERROR);
 274 }