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 <pwd.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <termios.h>
  25 #include <unistd.h>
  26
  27 #include "tmux.h"
  28
  29 /*
  30  * Create a new session and attach to the current terminal unless -d is given.
  31  */
  32
  33 enum cmd_retval  cmd_new_session_check(struct args *);
  34 enum cmd_retval  cmd_new_session_exec(struct cmd *, struct cmd_q *);
  35
  36 const struct cmd_entry cmd_new_session_entry = {
  37         "new-session", "new",
  38         "AdDn:s:t:x:y:", 0, 1,
  39         "[-AdD] [-n window-name] [-s session-name] " CMD_TARGET_SESSION_USAGE
  40         " [-x width] [-y height] [command]",
  41         CMD_STARTSERVER|CMD_CANTNEST|CMD_SENDENVIRON,
  42         NULL,
  43         cmd_new_session_check,
  44         cmd_new_session_exec
  45 };
  46
  47 enum cmd_retval
  48 cmd_new_session_check(struct args *args)
  49 {
  50         if (args_has(args, 't') && (args->argc != 0 || args_has(args, 'n')))
  51                 return (CMD_RETURN_ERROR);
  52         return (CMD_RETURN_NORMAL);
  53 }
  54
  55 enum cmd_retval
  56 cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq)
  57 {
  58         struct args     *args = self->args;
  59         struct client   *c = cmdq->client;
  60         struct session  *s, *groupwith;
  61         struct window   *w;
  62         struct environ   env;
  63         struct termios   tio, *tiop;
  64         struct passwd   *pw;
  65         const char      *newname, *target, *update, *cwd, *errstr;
  66         char            *cmd, *cause;
  67         int              detached, idx;
  68         u_int            sx, sy;
  69         int              already_attached;
  70
  71
  72         newname = args_get(args, 's');
  73         if (newname != NULL) {
  74                 if (!session_check_name(newname)) {
  75                         cmdq_error(cmdq, "bad session name: %s", newname);
  76                         return (CMD_RETURN_ERROR);
  77                 }
  78                 if (session_find(newname) != NULL) {
  79                         if (args_has(args, 'A')) {
  80                                 return (cmd_attach_session(cmdq, newname,
  81                                     args_has(args, 'D'), 0));
  82                         }
  83                         cmdq_error(cmdq, "duplicate session: %s", newname);
  84                         return (CMD_RETURN_ERROR);
  85                 }
  86         }
  87
  88         target = args_get(args, 't');
  89         if (target != NULL) {
  90                 groupwith = cmd_find_session(cmdq, target, 0);
  91                 if (groupwith == NULL)
  92                         return (CMD_RETURN_ERROR);
  93         } else
  94                 groupwith = NULL;
  95
  96         /* Set -d if no client. */
  97         detached = args_has(args, 'd');
  98         if (c == NULL)
  99                 detached = 1;
 100
 101         /* Is this client already attached? */
 102         already_attached = 0;
 103         if (c != NULL && c->session != NULL)
 104                 already_attached = 1;
 105
 106         /*
 107          * Save the termios settings, part of which is used for new windows in
 108          * this session.
 109          *
 110          * This is read again with tcgetattr() rather than using tty.tio as if
 111          * detached, tty_open won't be called. Because of this, it must be done
 112          * before opening the terminal as that calls tcsetattr() to prepare for
 113          * tmux taking over.
 114          */
 115         if (!detached && !already_attached && c->tty.fd != -1) {
 116                 if (tcgetattr(c->tty.fd, &tio) != 0)
 117                         fatal("tcgetattr failed");
 118                 tiop = &tio;
 119         } else
 120                 tiop = NULL;
 121
 122         /* Open the terminal if necessary. */
 123         if (!detached && !already_attached) {
 124                 if (server_client_open(c, NULL, &cause) != 0) {
 125                         cmdq_error(cmdq, "open terminal failed: %s", cause);
 126                         free(cause);
 127                         return (CMD_RETURN_ERROR);
 128                 }
 129         }
 130
 131         /* Get the new session working directory. */
 132         if (c != NULL && c->cwd != NULL)
 133                 cwd = c->cwd;
 134         else {
 135                 pw = getpwuid(getuid());
 136                 if (pw->pw_dir != NULL && *pw->pw_dir != '\0')
 137                         cwd = pw->pw_dir;
 138                 else
 139                         cwd = "/";
 140         }
 141
 142         /* Find new session size. */
 143         if (c != NULL) {
 144                 sx = c->tty.sx;
 145                 sy = c->tty.sy;
 146         } else {
 147                 sx = 80;
 148                 sy = 24;
 149         }
 150         if (detached && args_has(args, 'x')) {
 151                 sx = strtonum(args_get(args, 'x'), 1, USHRT_MAX, &errstr);
 152                 if (errstr != NULL) {
 153                         cmdq_error(cmdq, "width %s", errstr);
 154                         return (CMD_RETURN_ERROR);
 155                 }
 156         }
 157         if (detached && args_has(args, 'y')) {
 158                 sy = strtonum(args_get(args, 'y'), 1, USHRT_MAX, &errstr);
 159                 if (errstr != NULL) {
 160                         cmdq_error(cmdq, "height %s", errstr);
 161                         return (CMD_RETURN_ERROR);
 162                 }
 163         }
 164         if (sy > 0 && options_get_number(&global_s_options, "status"))
 165                 sy--;
 166         if (sx == 0)
 167                 sx = 1;
 168         if (sy == 0)
 169                 sy = 1;
 170
 171         /* Figure out the command for the new window. */
 172         if (target != NULL)
 173                 cmd = NULL;
 174         else if (args->argc != 0)
 175                 cmd = args->argv[0];
 176         else
 177                 cmd = options_get_string(&global_s_options, "default-command");
 178
 179         /* Construct the environment. */
 180         environ_init(&env);
 181         update = options_get_string(&global_s_options, "update-environment");
 182         if (c != NULL)
 183                 environ_update(update, &c->environ, &env);
 184
 185         /* Create the new session. */
 186         idx = -1 - options_get_number(&global_s_options, "base-index");
 187         s = session_create(newname, cmd, cwd, &env, tiop, idx, sx, sy, &cause);
 188         if (s == NULL) {
 189                 cmdq_error(cmdq, "create session failed: %s", cause);
 190                 free(cause);
 191                 return (CMD_RETURN_ERROR);
 192         }
 193         environ_free(&env);
 194
 195         /* Set the initial window name if one given. */
 196         if (cmd != NULL && args_has(args, 'n')) {
 197                 w = s->curw->window;
 198                 window_set_name(w, args_get(args, 'n'));
 199                 options_set_number(&w->options, "automatic-rename", 0);
 200         }
 201
 202         /*
 203          * If a target session is given, this is to be part of a session group,
 204          * so add it to the group and synchronize.
 205          */
 206         if (groupwith != NULL) {
 207                 session_group_add(groupwith, s);
 208                 session_group_synchronize_to(s);
 209                 session_select(s, RB_ROOT(&s->windows)->idx);
 210         }
 211
 212         /*
 213          * Set the client to the new session. If a command client exists, it is
 214          * taking this session and needs to get MSG_READY and stay around.
 215          */
 216         if (!detached) {
 217                 if (!already_attached)
 218                         server_write_ready(c);
 219                 else if (c->session != NULL)
 220                         c->last_session = c->session;
 221                 c->session = s;
 222                 notify_attached_session_changed(c);
 223                 session_update_activity(s);
 224                 server_redraw_client(c);
 225         }
 226         recalculate_sizes();
 227         server_update_socket();
 228
 229         /*
 230          * If there are still configuration file errors to display, put the new
 231          * session's current window into more mode and display them now.
 232          */
 233         if (cfg_finished)
 234                 cfg_show_causes(s);
 235
 236         if (!detached)
 237                 cmdq->client_exit = 0;
 238         return (CMD_RETURN_NORMAL);
 239 }