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File: [local] / src / usr.bin / tmux / cmd-show-environment.c (download)
Revision 1.7, Sun Mar 24 09:54:10 2013 UTC (11 years, 2 months ago) by nicm
Add a command queue to standardize and simplify commands that call other commands and allow a command to block execution of subsequent commands. This allows run-shell and if-shell to be synchronous which has been much requested. Each client has a default command queue and commands are consumed one at a time from it. A command may suspend execution from the queue by returning CMD_RETURN_WAIT and then resume it by calling cmd_continue() - for example run-shell does this from the callback that is fired after the job is freed. When the command queue becomes empty, command clients are automatically exited (unless attaching). A callback is also fired - this is used for nested commands in, for example, if-shell which can block execution of the client's cmdq until a new cmdq becomes empty. Also merge all the old error/info/print functions together and lose the old curclient/cmdclient distinction - a cmdq is bound to one client (or none if in the configuration file), this is a command client if c->session is NULL otherwise an attached client. |
/* $OpenBSD: cmd-show-environment.c,v 1.7 2013/03/24 09:54:10 nicm Exp $ */ /* * Copyright (c) 2009 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 <stdlib.h> #include <string.h> #include "tmux.h" /* * Show environment. */ enum cmd_retval cmd_show_environment_exec(struct cmd *, struct cmd_q *); const struct cmd_entry cmd_show_environment_entry = { "show-environment", "showenv", "gt:", 0, 1, "[-g] " CMD_TARGET_SESSION_USAGE " [name]", 0, NULL, NULL, cmd_show_environment_exec }; enum cmd_retval cmd_show_environment_exec(struct cmd *self, struct cmd_q *cmdq) { struct args *args = self->args; struct session *s; struct environ *env; struct environ_entry *envent; if (args_has(self->args, 'g')) env = &global_environ; else { if ((s = cmd_find_session(cmdq, args_get(args, 't'), 0)) == NULL) return (CMD_RETURN_ERROR); env = &s->environ; } if (args->argc != 0) { envent = environ_find(env, args->argv[0]); if (envent == NULL) { cmdq_error(cmdq, "unknown variable: %s", args->argv[0]); return (CMD_RETURN_ERROR); } if (envent->value != NULL) cmdq_print(cmdq, "%s=%s", envent->name, envent->value); else cmdq_print(cmdq, "-%s", envent->name); return (CMD_RETURN_NORMAL); } RB_FOREACH(envent, environ, env) { if (envent->value != NULL) cmdq_print(cmdq, "%s=%s", envent->name, envent->value); else cmdq_print(cmdq, "-%s", envent->name); } return (CMD_RETURN_NORMAL); }