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	Change nested check to compare server socket path rather than just assuming
that if $TMUX is set it is nested. From Micah Cowan.
This commit is contained in:
		@@ -693,17 +693,6 @@ server_client_msg_command(struct client *c, struct msg_command_data *data)
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	}
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	cmd_free_argv(argc, argv);
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	if (data->pid != -1) {
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		TAILQ_FOREACH(cmd, cmdlist, qentry) {
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			if (cmd->entry->flags & CMD_CANTNEST) {
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				server_client_msg_error(&ctx,
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				    "sessions should be nested with care. "
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				    "unset $TMUX to force");
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				goto error;
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			}
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		}
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	}
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	if (cmd_list_exec(cmdlist, &ctx) != 1)
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		server_write_client(c, MSG_EXIT, NULL, 0);
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	cmd_list_free(cmdlist);
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										17
									
								
								tmux.c
									
									
									
									
									
								
							
							
						
						
									
										17
									
								
								tmux.c
									
									
									
									
									
								
							@@ -484,6 +484,7 @@ main(int argc, char **argv)
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		cmddata.pid = envdata.pid;
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		cmddata.idx = envdata.idx;
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		/* Prepare command for server. */
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		cmddata.argc = argc;
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		if (cmd_pack_argv(
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		    argc, argv, cmddata.argv, sizeof cmddata.argv) != 0) {
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@@ -499,7 +500,7 @@ main(int argc, char **argv)
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	if (shellcmd != NULL)
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		cmdflags |= CMD_STARTSERVER;
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	else if (argc == 0)	/* new-session is the default */
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		cmdflags |= CMD_STARTSERVER|CMD_SENDENVIRON;
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		cmdflags |= CMD_STARTSERVER|CMD_SENDENVIRON|CMD_CANTNEST;
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	else {
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		/*
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		 * It sucks parsing the command string twice (in client and
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@@ -516,10 +517,24 @@ main(int argc, char **argv)
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				cmdflags |= CMD_STARTSERVER;
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			if (cmd->entry->flags & CMD_SENDENVIRON)
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				cmdflags |= CMD_SENDENVIRON;
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			if (cmd->entry->flags & CMD_CANTNEST)
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				cmdflags |= CMD_CANTNEST;
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		}
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		cmd_list_free(cmdlist);
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	}
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	/*
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	 * Check if this could be a nested session, if the command can't nest:
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	 * if the socket path matches $TMUX, this is probably the same server.
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	 */
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	if (shellcmd == NULL && envdata.path != NULL &&
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	    cmdflags & CMD_CANTNEST &&
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	    (path == envdata.path || strcmp(path, envdata.path) == 0)) {
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		log_warnx("sessions should be nested with care. "
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		    "unset $TMUX to force.");
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		exit(1);
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	}
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	if ((main_ibuf = client_init(path, cmdflags, flags)) == NULL)
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		exit(1);
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	xfree(path);
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