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tmux/cmd-show-environment.c

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Infrastructure and commands to manage the environment for processes started within tmux. There is a global environment, copied from the external environment when the server is started and each sesssion has an (initially empty) session environment which overrides it. New commands set-environment and show-environment manipulate or display the environments. A new session option, update-environment, is a space-separated list of variables which are updated from the external environment into the session environment every time a new session is created - the default is DISPLAY.
2009-08-08 21:52:43 +00:00
/* $OpenBSD$ */
/*
* 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.
*/
Add a -s flag to show-environment to output Bourne shell commands a la ssh-agent. Mostly from Cam Hutchison with some changes by me.
2015-07-13 13:36:29 +00:00
enum cmd_retval cmd_show_environment_exec(struct cmd *, struct cmd_q *);
char *cmd_show_environment_escape(struct environ_entry *);
void cmd_show_environment_print(struct cmd *, struct cmd_q *,
struct environ_entry *);
Infrastructure and commands to manage the environment for processes started within tmux. There is a global environment, copied from the external environment when the server is started and each sesssion has an (initially empty) session environment which overrides it. New commands set-environment and show-environment manipulate or display the environments. A new session option, update-environment, is a space-separated list of variables which are updated from the external environment into the session environment every time a new session is created - the default is DISPLAY.
2009-08-08 21:52:43 +00:00
const struct cmd_entry cmd_show_environment_entry = {
"show-environment", "showenv",
Add a -s flag to show-environment to output Bourne shell commands a la ssh-agent. Mostly from Cam Hutchison with some changes by me.
2015-07-13 13:36:29 +00:00
"gst:", 0, 1,
"[-gs] " CMD_TARGET_SESSION_USAGE " [name]",
Clean up and simplify tmux command argument parsing. Originally, tmux commands were parsed in the client process into a struct with the command data which was then serialised and sent to the server to be executed. The parsing was later moved into the server (an argv was sent from the client), but the parse step and intermediate struct was kept. This change removes that struct and the separate parse step. Argument parsing and printing is now common to all commands (in arguments.c) with each command left with just an optional check function (to validate the arguments at parse time), the exec function and a function to set up any key bindings (renamed from the old init function). This is overall more simple and consistent. There should be no changes to any commands behaviour or syntax although as this touches every command please watch for any unexpected changes.
2011-01-04 00:42:46 +00:00
0,
cmd_show_environment_exec
Infrastructure and commands to manage the environment for processes started within tmux. There is a global environment, copied from the external environment when the server is started and each sesssion has an (initially empty) session environment which overrides it. New commands set-environment and show-environment manipulate or display the environments. A new session option, update-environment, is a space-separated list of variables which are updated from the external environment into the session environment every time a new session is created - the default is DISPLAY.
2009-08-08 21:52:43 +00:00
};
Add a -s flag to show-environment to output Bourne shell commands a la ssh-agent. Mostly from Cam Hutchison with some changes by me.
2015-07-13 13:36:29 +00:00
char *
cmd_show_environment_escape(struct environ_entry *envent)
{
const char *value = envent->value;
char c, *out, *ret;
out = ret = xmalloc(strlen(value) * 2 + 1); /* at most twice the size */
while ((c = *value++) != '\0') {
/* POSIX interprets $ ` " and \ in double quotes. */
if (c == '$' || c == '`' || c == '"' || c == '\\')
*out++ = '\\';
*out++ = c;
}
*out = '\0';
return ret;
}
void
cmd_show_environment_print(struct cmd *self, struct cmd_q *cmdq,
struct environ_entry *envent)
{
char *escaped;
if (!args_has(self->args, 's')) {
if (envent->value != NULL)
cmdq_print(cmdq, "%s=%s", envent->name, envent->value);
else
cmdq_print(cmdq, "-%s", envent->name);
return;
}
if (envent->value != NULL) {
escaped = cmd_show_environment_escape(envent);
cmdq_print(cmdq, "%s=\"%s\"; export %s;", envent->name, escaped,
envent->name);
free(escaped);
} else
cmdq_print(cmdq, "unset %s;", envent->name);
}
Make command exec functions return an enum rather than -1/0/1 values and add a new value to mean "leave client running but don't attach" to fix problems with using some commands in a command sequence. Most of the work by Thomas Adam, problem reported by "jspenguin" on SF bug 3535531.
2012-07-11 07:10:15 +00:00
enum cmd_retval
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.
2013-03-24 09:54:10 +00:00
cmd_show_environment_exec(struct cmd *self, struct cmd_q *cmdq)
Infrastructure and commands to manage the environment for processes started within tmux. There is a global environment, copied from the external environment when the server is started and each sesssion has an (initially empty) session environment which overrides it. New commands set-environment and show-environment manipulate or display the environments. A new session option, update-environment, is a space-separated list of variables which are updated from the external environment into the session environment every time a new session is created - the default is DISPLAY.
2009-08-08 21:52:43 +00:00
{
Clean up and simplify tmux command argument parsing. Originally, tmux commands were parsed in the client process into a struct with the command data which was then serialised and sent to the server to be executed. The parsing was later moved into the server (an argv was sent from the client), but the parse step and intermediate struct was kept. This change removes that struct and the separate parse step. Argument parsing and printing is now common to all commands (in arguments.c) with each command left with just an optional check function (to validate the arguments at parse time), the exec function and a function to set up any key bindings (renamed from the old init function). This is overall more simple and consistent. There should be no changes to any commands behaviour or syntax although as this touches every command please watch for any unexpected changes.
2011-01-04 00:42:46 +00:00
struct args *args = self->args;
struct session *s;
struct environ *env;
struct environ_entry *envent;
Infrastructure and commands to manage the environment for processes started within tmux. There is a global environment, copied from the external environment when the server is started and each sesssion has an (initially empty) session environment which overrides it. New commands set-environment and show-environment manipulate or display the environments. A new session option, update-environment, is a space-separated list of variables which are updated from the external environment into the session environment every time a new session is created - the default is DISPLAY.
2009-08-08 21:52:43 +00:00
Clean up and simplify tmux command argument parsing. Originally, tmux commands were parsed in the client process into a struct with the command data which was then serialised and sent to the server to be executed. The parsing was later moved into the server (an argv was sent from the client), but the parse step and intermediate struct was kept. This change removes that struct and the separate parse step. Argument parsing and printing is now common to all commands (in arguments.c) with each command left with just an optional check function (to validate the arguments at parse time), the exec function and a function to set up any key bindings (renamed from the old init function). This is overall more simple and consistent. There should be no changes to any commands behaviour or syntax although as this touches every command please watch for any unexpected changes.
2011-01-04 00:42:46 +00:00
if (args_has(self->args, 'g'))
Infrastructure and commands to manage the environment for processes started within tmux. There is a global environment, copied from the external environment when the server is started and each sesssion has an (initially empty) session environment which overrides it. New commands set-environment and show-environment manipulate or display the environments. A new session option, update-environment, is a space-separated list of variables which are updated from the external environment into the session environment every time a new session is created - the default is DISPLAY.
2009-08-08 21:52:43 +00:00
env = &global_environ;
else {
Add a -s flag to show-environment to output Bourne shell commands a la ssh-agent. Mostly from Cam Hutchison with some changes by me.
2015-07-13 13:36:29 +00:00
s = cmd_find_session(cmdq, args_get(args, 't'), 0);
if (s == NULL)
Make command exec functions return an enum rather than -1/0/1 values and add a new value to mean "leave client running but don't attach" to fix problems with using some commands in a command sequence. Most of the work by Thomas Adam, problem reported by "jspenguin" on SF bug 3535531.
2012-07-11 07:10:15 +00:00
return (CMD_RETURN_ERROR);
Infrastructure and commands to manage the environment for processes started within tmux. There is a global environment, copied from the external environment when the server is started and each sesssion has an (initially empty) session environment which overrides it. New commands set-environment and show-environment manipulate or display the environments. A new session option, update-environment, is a space-separated list of variables which are updated from the external environment into the session environment every time a new session is created - the default is DISPLAY.
2009-08-08 21:52:43 +00:00
env = &s->environ;
}
Accept an argument to show-environment to show one variable, based on a diff from Kazuhiko Sakaguchi.
2012-03-22 11:11:57 +00:00
if (args->argc != 0) {
envent = environ_find(env, args->argv[0]);
if (envent == NULL) {
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.
2013-03-24 09:54:10 +00:00
cmdq_error(cmdq, "unknown variable: %s", args->argv[0]);
Make command exec functions return an enum rather than -1/0/1 values and add a new value to mean "leave client running but don't attach" to fix problems with using some commands in a command sequence. Most of the work by Thomas Adam, problem reported by "jspenguin" on SF bug 3535531.
2012-07-11 07:10:15 +00:00
return (CMD_RETURN_ERROR);
Accept an argument to show-environment to show one variable, based on a diff from Kazuhiko Sakaguchi.
2012-03-22 11:11:57 +00:00
}
Add a -s flag to show-environment to output Bourne shell commands a la ssh-agent. Mostly from Cam Hutchison with some changes by me.
2015-07-13 13:36:29 +00:00
cmd_show_environment_print(self, cmdq, envent);
Make command exec functions return an enum rather than -1/0/1 values and add a new value to mean "leave client running but don't attach" to fix problems with using some commands in a command sequence. Most of the work by Thomas Adam, problem reported by "jspenguin" on SF bug 3535531.
2012-07-11 07:10:15 +00:00
return (CMD_RETURN_NORMAL);
Accept an argument to show-environment to show one variable, based on a diff from Kazuhiko Sakaguchi.
2012-03-22 11:11:57 +00:00
}
Add a -s flag to show-environment to output Bourne shell commands a la ssh-agent. Mostly from Cam Hutchison with some changes by me.
2015-07-13 13:36:29 +00:00
RB_FOREACH(envent, environ, env)
cmd_show_environment_print(self, cmdq, envent);
Make command exec functions return an enum rather than -1/0/1 values and add a new value to mean "leave client running but don't attach" to fix problems with using some commands in a command sequence. Most of the work by Thomas Adam, problem reported by "jspenguin" on SF bug 3535531.
2012-07-11 07:10:15 +00:00
return (CMD_RETURN_NORMAL);
Infrastructure and commands to manage the environment for processes started within tmux. There is a global environment, copied from the external environment when the server is started and each sesssion has an (initially empty) session environment which overrides it. New commands set-environment and show-environment manipulate or display the environments. A new session option, update-environment, is a space-separated list of variables which are updated from the external environment into the session environment every time a new session is created - the default is DISPLAY.
2009-08-08 21:52:43 +00:00
}
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