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tmate/cmd-save-buffer.c

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No need for $Id$ now.
2014-11-08 13:27:43 +01:00
/* $OpenBSD$ */
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
/*
* Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
*
* 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 <sys/stat.h>
#include <errno.h>
Alter how tmux handles the working directory to internally use file descriptors rather than strings. - Each session still has a current working directory. - New sessions still get their working directory from the client that created them or its attached session if any. - New windows are created by default in the session working directory. - The -c flag to new, neww, splitw allows the working directory to be overridden. - The -c flag to attach let's the session working directory be changed. - The default-path option has been removed. To get the equivalent to default-path '.', do: bind c neww -c $PWD To get the equivalent of default-path '', do: bind c neww -c '#{pane_current_path}' The equivalent of default-path '~' is left as an exercise for the reader. This also changes the client identify protocol to be a set of messages rather than one as well as some other changes that should make it easier to make backwards-compatible protocol changes in future.
2013-10-06 22:02:23 +02:00
#include <fcntl.h>
Sync OpenBSD patchset 1150: xfree is not particularly helpful, remove it. From Thomas Adam.
2012-07-11 21:34:16 +02:00
#include <stdlib.h>
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
#include <string.h>
Alter how tmux handles the working directory to internally use file descriptors rather than strings. - Each session still has a current working directory. - New sessions still get their working directory from the client that created them or its attached session if any. - New windows are created by default in the session working directory. - The -c flag to new, neww, splitw allows the working directory to be overridden. - The -c flag to attach let's the session working directory be changed. - The default-path option has been removed. To get the equivalent to default-path '.', do: bind c neww -c $PWD To get the equivalent of default-path '', do: bind c neww -c '#{pane_current_path}' The equivalent of default-path '~' is left as an exercise for the reader. This also changes the client identify protocol to be a set of messages rather than one as well as some other changes that should make it easier to make backwards-compatible protocol changes in future.
2013-10-06 22:02:23 +02:00
#include <unistd.h>
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
#include "tmux.h"
/*
Sync OpenBSD patchset 964: Plug a memory leak and update some comments, from Tiago Cunha.
2011-10-23 17:02:20 +02:00
* Saves a paste buffer to a file.
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
*/
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.
2013-02-23 23:25:58 +01:00
enum cmd_retval cmd_save_buffer_exec(struct cmd *, struct cmd_q *);
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
const struct cmd_entry cmd_save_buffer_entry = {
"save-buffer", "saveb",
Sync OpenBSD patchset 829: 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.
2011-01-07 15:45:34 +01:00
"ab:", 1, 1,
Sync OpenBSD patchset 1077: Fix save-buffer usage, from Kazuhiko Sakaguchi.
2012-03-29 23:08:44 +02:00
"[-a] " CMD_BUFFER_USAGE " path",
Sync OpenBSD patchset 829: 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.
2011-01-07 15:45:34 +01:00
0,
cmd_save_buffer_exec
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
};
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
const struct cmd_entry cmd_show_buffer_entry = {
"show-buffer", "showb",
"b:", 0, 0,
CMD_BUFFER_USAGE,
0,
cmd_save_buffer_exec
};
Sync OpenBSD patchset 1151: 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 21:37:32 +02:00
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.
2013-02-23 23:25:58 +01:00
cmd_save_buffer_exec(struct cmd *self, struct cmd_q *cmdq)
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
{
Sync OpenBSD patchset 829: 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.
2011-01-07 15:45:34 +01:00
struct args *args = self->args;
Alter how tmux handles the working directory to internally use file descriptors rather than strings. - Each session still has a current working directory. - New sessions still get their working directory from the client that created them or its attached session if any. - New windows are created by default in the session working directory. - The -c flag to new, neww, splitw allows the working directory to be overridden. - The -c flag to attach let's the session working directory be changed. - The default-path option has been removed. To get the equivalent to default-path '.', do: bind c neww -c $PWD To get the equivalent of default-path '', do: bind c neww -c '#{pane_current_path}' The equivalent of default-path '~' is left as an exercise for the reader. This also changes the client identify protocol to be a set of messages rather than one as well as some other changes that should make it easier to make backwards-compatible protocol changes in future.
2013-10-06 22:02:23 +02:00
struct client *c = cmdq->client;
Sync OpenBSD patchset 968: Try to resolve relative paths for loadb and saveb (first using client working directory if any then default-path or session wd).
2011-10-23 17:08:58 +02:00
struct session *s;
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
struct paste_buffer *pb;
Because pledge(2) does not allow us to pass directory file descriptors around, we can't use file descriptors for the working directory because we will be unable to pass it to a privileged process to tell it where to read or write files or spawn children. So move tmux back to using strings for the current working directory. We try to check it exists with access() when it is set but ultimately fall back to ~ if it fails at time of use (or / if that fails too).
2015-10-31 09:13:58 +01:00
const char *path, *bufname, *bufdata, *start, *end, *cwd;
const char *flags;
char *msg, *file, resolved[PATH_MAX];
Move struct paste_buffer out of tmux.h.
2015-08-29 11:25:00 +02:00
size_t size, used, msglen, bufsize;
Sync OpenBSD patchset 741: When changing so that the client passes its stdout and stderr as well as stdin up to the server, I forgot one essential point - the tmux server could now be both the producer and consumer. This happens when tmux is run inside tmux, as well as when piping tmux commands together. So, using stdio(3) was a bad idea - if sufficient data was written, this could block in write(2). When that happened and the server was both producer and consumer, it deadlocks. Change to use libevent bufferevents for the client stdin, stdout and stderr instead. This is trivial enough for output but requires a callback mechanism to trigger when stdin is finished. This relies on the underlying polling mechanism for libevent to work with whatever devices to which the user could redirect stdin, stdout or stderr, hence the change to use poll(2) over kqueue(2) for tmux.
2010-08-09 23:44:25 +02:00
FILE *f;
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
Sync OpenBSD patchset 829: 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.
2011-01-07 15:45:34 +01:00
if (!args_has(args, 'b')) {
Move struct paste_buffer out of tmux.h.
2015-08-29 11:25:00 +02:00
if ((pb = paste_get_top(NULL)) == 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.
2013-02-23 23:25:58 +01:00
cmdq_error(cmdq, "no buffers");
Sync OpenBSD patchset 1151: 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 21:37:32 +02:00
return (CMD_RETURN_ERROR);
Pass return code from _exec; allow command sequences to work from the command line.
2009-01-19 19:23:40 +01:00
}
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
} else {
Add support for named buffers. If you don't name a buffer, things work much as before - buffers are automatically named "buffer0000", "buffer0001" and so on and ordered as a stack. Buffers can be named explicitly when creating ("loadb -b foo" etc) or renamed ("setb -b buffer0000 -n foo"). If buffers are named explicitly, they are not deleted when buffer-limit is reached. Diff from J Raynor.
2014-05-13 09:34:35 +02:00
bufname = args_get(args, 'b');
pb = paste_get_name(bufname);
Global paste buffers instead of per-session which renders copy-buffer useless. As a consequence buffer-limit is now a server option.
2010-12-30 23:39:49 +01:00
if (pb == NULL) {
Add support for named buffers. If you don't name a buffer, things work much as before - buffers are automatically named "buffer0000", "buffer0001" and so on and ordered as a stack. Buffers can be named explicitly when creating ("loadb -b foo" etc) or renamed ("setb -b buffer0000 -n foo"). If buffers are named explicitly, they are not deleted when buffer-limit is reached. Diff from J Raynor.
2014-05-13 09:34:35 +02:00
cmdq_error(cmdq, "no buffer %s", bufname);
Sync OpenBSD patchset 1151: 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 21:37:32 +02:00
return (CMD_RETURN_ERROR);
Pass return code from _exec; allow command sequences to work from the command line.
2009-01-19 19:23:40 +01:00
}
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
}
Move struct paste_buffer out of tmux.h.
2015-08-29 11:25:00 +02:00
bufdata = paste_buffer_data(pb, &bufsize);
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
if (self->entry == &cmd_show_buffer_entry)
path = "-";
else
path = args->argv[0];
Sync OpenBSD patchset 829: 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.
2011-01-07 15:45:34 +01:00
if (strcmp(path, "-") == 0) {
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.
2013-02-23 23:25:58 +01:00
if (c == NULL) {
cmdq_error(cmdq, "can't write to stdout");
return (CMD_RETURN_ERROR);
}
if (c->session == NULL || (c->flags & CLIENT_CONTROL))
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
goto do_stdout;
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.
2013-02-23 23:25:58 +01:00
goto do_print;
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
}
Sync OpenBSD patchset 968: Try to resolve relative paths for loadb and saveb (first using client working directory if any then default-path or session wd).
2011-10-23 17:08:58 +02:00
Alter how tmux handles the working directory to internally use file descriptors rather than strings. - Each session still has a current working directory. - New sessions still get their working directory from the client that created them or its attached session if any. - New windows are created by default in the session working directory. - The -c flag to new, neww, splitw allows the working directory to be overridden. - The -c flag to attach let's the session working directory be changed. - The default-path option has been removed. To get the equivalent to default-path '.', do: bind c neww -c $PWD To get the equivalent of default-path '', do: bind c neww -c '#{pane_current_path}' The equivalent of default-path '~' is left as an exercise for the reader. This also changes the client identify protocol to be a set of messages rather than one as well as some other changes that should make it easier to make backwards-compatible protocol changes in future.
2013-10-06 22:02:23 +02:00
if (c != NULL && c->session == NULL)
cwd = c->cwd;
Rewrite of the target resolution internals to be simpler and more consistent but with much less duplication, but keeping the same internal API. Also adds more readable aliases for some of the special tokens used in targets (eg "{start}" instead of "^"). Some behaviours may have changed, for example prefix matches now happen before fnmatch.
2015-04-27 18:25:57 +02:00
else if ((s = cmd_find_current(cmdq)) != NULL)
Alter how tmux handles the working directory to internally use file descriptors rather than strings. - Each session still has a current working directory. - New sessions still get their working directory from the client that created them or its attached session if any. - New windows are created by default in the session working directory. - The -c flag to new, neww, splitw allows the working directory to be overridden. - The -c flag to attach let's the session working directory be changed. - The default-path option has been removed. To get the equivalent to default-path '.', do: bind c neww -c $PWD To get the equivalent of default-path '', do: bind c neww -c '#{pane_current_path}' The equivalent of default-path '~' is left as an exercise for the reader. This also changes the client identify protocol to be a set of messages rather than one as well as some other changes that should make it easier to make backwards-compatible protocol changes in future.
2013-10-06 22:02:23 +02:00
cwd = s->cwd;
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
else
Because pledge(2) does not allow us to pass directory file descriptors around, we can't use file descriptors for the working directory because we will be unable to pass it to a privileged process to tell it where to read or write files or spawn children. So move tmux back to using strings for the current working directory. We try to check it exists with access() when it is set but ultimately fall back to ~ if it fails at time of use (or / if that fails too).
2015-10-31 09:13:58 +01:00
cwd = ".";
Alter how tmux handles the working directory to internally use file descriptors rather than strings. - Each session still has a current working directory. - New sessions still get their working directory from the client that created them or its attached session if any. - New windows are created by default in the session working directory. - The -c flag to new, neww, splitw allows the working directory to be overridden. - The -c flag to attach let's the session working directory be changed. - The default-path option has been removed. To get the equivalent to default-path '.', do: bind c neww -c $PWD To get the equivalent of default-path '', do: bind c neww -c '#{pane_current_path}' The equivalent of default-path '~' is left as an exercise for the reader. This also changes the client identify protocol to be a set of messages rather than one as well as some other changes that should make it easier to make backwards-compatible protocol changes in future.
2013-10-06 22:02:23 +02:00
Because pledge(2) does not allow us to pass directory file descriptors around, we can't use file descriptors for the working directory because we will be unable to pass it to a privileged process to tell it where to read or write files or spawn children. So move tmux back to using strings for the current working directory. We try to check it exists with access() when it is set but ultimately fall back to ~ if it fails at time of use (or / if that fails too).
2015-10-31 09:13:58 +01:00
flags = "wb";
if (args_has(self->args, 'a'))
flags = "ab";
Handle absolute paths properly, and don't use resolved path in realpath() fails.
2015-11-10 23:29:33 +01:00
if (*path == '/')
file = xstrdup(path);
Because pledge(2) does not allow us to pass directory file descriptors around, we can't use file descriptors for the working directory because we will be unable to pass it to a privileged process to tell it where to read or write files or spawn children. So move tmux back to using strings for the current working directory. We try to check it exists with access() when it is set but ultimately fall back to ~ if it fails at time of use (or / if that fails too).
2015-10-31 09:13:58 +01:00
else
Handle absolute paths properly, and don't use resolved path in realpath() fails.
2015-11-10 23:29:33 +01:00
xasprintf(&file, "%s/%s", cwd, path);
If realpath() fails just try the original path.
2015-11-10 23:33:47 +01:00
if (realpath(file, resolved) == NULL &&
strlcpy(resolved, file, sizeof resolved) >= sizeof resolved) {
cmdq_error(cmdq, "%s: %s", file, strerror(ENAMETOOLONG));
Handle absolute paths properly, and don't use resolved path in realpath() fails.
2015-11-10 23:29:33 +01:00
return (CMD_RETURN_ERROR);
}
f = fopen(resolved, flags);
Because pledge(2) does not allow us to pass directory file descriptors around, we can't use file descriptors for the working directory because we will be unable to pass it to a privileged process to tell it where to read or write files or spawn children. So move tmux back to using strings for the current working directory. We try to check it exists with access() when it is set but ultimately fall back to ~ if it fails at time of use (or / if that fails too).
2015-10-31 09:13:58 +01:00
free(file);
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
if (f == NULL) {
Because pledge(2) does not allow us to pass directory file descriptors around, we can't use file descriptors for the working directory because we will be unable to pass it to a privileged process to tell it where to read or write files or spawn children. So move tmux back to using strings for the current working directory. We try to check it exists with access() when it is set but ultimately fall back to ~ if it fails at time of use (or / if that fails too).
2015-10-31 09:13:58 +01:00
cmdq_error(cmdq, "%s: %s", resolved, strerror(errno));
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
return (CMD_RETURN_ERROR);
}
Because pledge(2) does not allow us to pass directory file descriptors around, we can't use file descriptors for the working directory because we will be unable to pass it to a privileged process to tell it where to read or write files or spawn children. So move tmux back to using strings for the current working directory. We try to check it exists with access() when it is set but ultimately fall back to ~ if it fails at time of use (or / if that fails too).
2015-10-31 09:13:58 +01:00
Move struct paste_buffer out of tmux.h.
2015-08-29 11:25:00 +02:00
if (fwrite(bufdata, 1, bufsize, f) != bufsize) {
Because pledge(2) does not allow us to pass directory file descriptors around, we can't use file descriptors for the working directory because we will be unable to pass it to a privileged process to tell it where to read or write files or spawn children. So move tmux back to using strings for the current working directory. We try to check it exists with access() when it is set but ultimately fall back to ~ if it fails at time of use (or / if that fails too).
2015-10-31 09:13:58 +01:00
cmdq_error(cmdq, "%s: write error", resolved);
Sync OpenBSD patchset 741: When changing so that the client passes its stdout and stderr as well as stdin up to the server, I forgot one essential point - the tmux server could now be both the producer and consumer. This happens when tmux is run inside tmux, as well as when piping tmux commands together. So, using stdio(3) was a bad idea - if sufficient data was written, this could block in write(2). When that happened and the server was both producer and consumer, it deadlocks. Change to use libevent bufferevents for the client stdin, stdout and stderr instead. This is trivial enough for output but requires a callback mechanism to trigger when stdin is finished. This relies on the underlying polling mechanism for libevent to work with whatever devices to which the user could redirect stdin, stdout or stderr, hence the change to use poll(2) over kqueue(2) for tmux.
2010-08-09 23:44:25 +02:00
fclose(f);
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
return (CMD_RETURN_ERROR);
}
fclose(f);
return (CMD_RETURN_NORMAL);
do_stdout:
Move struct paste_buffer out of tmux.h.
2015-08-29 11:25:00 +02:00
evbuffer_add(c->stdout_data, bufdata, bufsize);
Push stdout and stderr to clients more aggressively, and add an event to continue if the send fails.
2015-11-14 10:41:06 +01:00
server_client_push_stdout(c);
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
return (CMD_RETURN_NORMAL);
do_print:
Move struct paste_buffer out of tmux.h.
2015-08-29 11:25:00 +02:00
if (bufsize > (INT_MAX / 4) - 1) {
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.
2013-02-23 23:25:58 +01:00
cmdq_error(cmdq, "buffer too big");
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
return (CMD_RETURN_ERROR);
}
msg = NULL;
used = 0;
Move struct paste_buffer out of tmux.h.
2015-08-29 11:25:00 +02:00
while (used != bufsize) {
start = bufdata + used;
end = memchr(start, '\n', bufsize - used);
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
if (end != NULL)
size = end - start;
else
Move struct paste_buffer out of tmux.h.
2015-08-29 11:25:00 +02:00
size = bufsize - used;
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
msglen = size * 4 + 1;
Add xreallocarray and remove nmemb argument from xrealloc.
2014-10-08 19:35:58 +02:00
msg = xrealloc(msg, msglen);
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
strvisx(msg, start, size, VIS_OCTAL|VIS_TAB);
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.
2013-02-23 23:25:58 +01:00
cmdq_print(cmdq, "%s", msg);
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
used += size + (end != NULL);
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
}
Merge show-buffer into save-buffer.
2013-02-23 15:23:35 +01:00
free(msg);
Sync OpenBSD patchset 1151: 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 21:37:32 +02:00
return (CMD_RETURN_NORMAL);
save-buffer command, from Tiago Cunha.
2009-01-12 00:14:57 +01:00
}
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