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Proof-of-concept of a GUI frontend program. Written in Tcl/Tk.

This commit is contained in:
Thomas Schmitt 2012-12-27 09:53:59 +00:00
parent dc3263534d
commit 19027b1d42
8 changed files with 4564 additions and 3 deletions
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8
Makefile.am
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@ -172,6 +172,11 @@ xorriso_make_xorriso_1_CFLAGS =
xorriso_make_xorriso_1_LDADD =
xorriso_make_xorriso_1_SOURCES = xorriso/make_xorriso_1.c
# A Proof-of-concept for frontends
bin_SCRIPTS = \
frontend/xorriso-tcltk
## ========================================================================= ##
## Build documentation (You need Doxygen for this to work)
@ -244,7 +249,8 @@ EXTRA_DIST = \
doc/partition_offset.wiki \
doc/qemu_xorriso.wiki \
doc/startup_file.txt \
test/frontend_pipes_xorriso.c \
frontend/frontend_pipes_xorriso.c \
frontend/README-tcltk \
README \
AUTHORS \
CONTRIBUTORS \

22
README
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@ -149,6 +149,28 @@ So after installation of a binary libisoburn package you may find it e.g. as
/usr/include/libisoburn/xorriso.h
xorriso under control of a (GUI) frontend process
The dialog mode allows frontend programs to connect via pipes to the standard
input and output of xorriso. Several commands of xorriso help with receiving
and parsing of reply messages.
As a proof of concept, there is the Tcl/Tk script xorriso-tcltk which can
be launched by this shell command:
xorriso -launch_frontend $(which xorriso-tcltk) --stdio --
See file frontend/README-tcltk for a description of its GUI.
See its Tcl code for getting an idea how this gets achieved.
Further there is the C program frontend/frontend_pipes_xorriso.c which
forks a xorriso process and shows the same communication gestures as
xorriso-tcltk.
In particular it connects to xorriso via two pipes, sends commands, waits
for all replies of a command, picks info out of the xorriso message sieve,
and parses reply message lines into words.
Drives and Disk File Objects
The user of libisoburn applications needs operating system dependent

291
frontend/README-tcltk Normal file
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@ -0,0 +1,291 @@
------------------------------------------------------------------------------
xorriso-tcltk
------------------------------------------------------------------------------
Copyright (C) 2012, Thomas Schmitt <scdbackup@gmx.net>, libburnia-project.org
Provided under GNU GPL version 2 or later.
------------------------------------------------------------------------------
xorriso-tcltk is mainly a proof of concept for a frontend that operates
xorriso in dialog mode.
It exercises several fundamental gestures of communication:
- connecting via two pipes
- sending commands
- receiving replies
- inquiring the xorriso message sieve
- using the xorriso parsing service
Note that any other language than Tcl/Tk could be used, if it only can
do i/o via standard input and standard output or via named pipes.
Further it has to perform integer arithmetics and string manipulations.
And, well, a graphical widget set would be nice.
See man xorriso for a documentation of xorriso concepts and commands.
See man xorrecord for details of the burn image file feature.
Quick start:
xorriso -launch_frontend $(which xorriso-tcltk) --stdio --
The Tcl shell "wish" is allergic to options which start by "-h".
So here is the output of xorriso-tcltk --help :
------------------------------------------------------------------------
Usage:
xorriso-tcltk [options]
Options:
All options must be given with two dashes ("--option") in
order to distinguish them from any options of the Tcl shell.
--help
Print this text and exit.
--stdio
Establishes connection to xorriso via stdin and stdout.
E.g. when letting xorriso start this frontend program:
xorriso -launch_frontend $(which xorriso-tcltk) --stdio --
--named_pipes cmd_fifo reply_fifo
Establishes connection to a xorriso process started by:
xorriso -dialog on <cmd_fifo >reply_fifo
which is then ready for a run of:
xorriso-tcltk --named_pipes cmd_fifo reply_fifo
It is important that the parent of xorriso and of this
tcl/tk frontend opens the named pipe for commands before
it opens the named pipe for replies. This avoids deadlock.
--geometry {+|-}X{+|-}Y
Sets the position of the main window.
--click_to_focus
Chooses that input fields and list boxes get the keyboard
focus only when being clicked by the mouse.
--auto_focus
Chooses that the keyboard focus is where the mouse
pointer is. (Default)
--log_file path
Set a file address for logging of xorriso commands and
reply messages. The log lines will be appended.
Either --stdio or --named_pipes must be given for a program run.
------------------------------------------------------------------------
Overview of GUI elements
The window is separated into three main areas:
- Connection to xorriso.
- Management of drives and image files.
- Inspection, manipulation, and exploitation of xorriso ISO image model.
------------------------------------------------------------------------
Connection to xorriso
The "End" button leads to the end of frontend and xorriso process.
The ready/busy field indicates whether a xorriso command is being executed
and the frontend is still waiting for its reply messages.
The "Command:" field can be used to send commands to xorriso.
The "Refresh state display" button causes the other two main areas to update
their display after manually transmitted commands may have changed the state
of drives or ISO model.
The "Log pipes" switch controls whether all xorriso commands and replies
shall be logged to standard error resp. to the file that has been iven
with program argumen --log_file. Caution: This log is verbous.
The message box displays commands sent to xorriso and messages recieved
from xorriso.
Many commands which are emitted by the GUI will hide themselves and their
replies from this display.
All event messages with severity WARNING or higher will show up, nevertheless.
The "Recent problem:" field shows the most severe event message that occured
during the execution of the most recent command. It also displays the most
recent problem message from the frontend program itself.
Several commands emitted by the GUI will not clear this display. But any
manually transmitted command and the major GUI gestures will do.
The "Worst problem:" field shows the most severe event message that occured
since last time the "Clear" button was hit. It will not clear automatically.
------------------------------------------------------------------------
Management of drives and image files
The "Scan for drives" button executes command -devices and puts the list
of found optical drives into the box underneath the button.
The "Pick input drive" button executes command -indev and obtains some
information about the medium status. This info is displayed in the
"Input drive or image" line.
Further it causes the display of the ISO image model to be updated.
The "Pick output drive" button executes command -outdev and displays the
related info in the "Output drive or image" line.
The "Pick drive for both roles" button executes command -dev and displays
info in both "... drive or image" lines.
The "Give up drives" executes commands -indev "" -outdev "" and clears
both "... drive or image" lines, as well as the ISO model.
The "Calm drives" button executes command -calm_drives which tells the
aquired optical drives to stop spinning until the next drive activity
gets triggered.
The "Rollback" button excutes command -rollbackwhich drops all pending
changes of the ISO model and reloads it from the input drive, if one is
aquired.
The box underneath these buttons shows the optical drives found by the
"Can for drives" button.
A double-click on a drive item has the same effect as button "Pick drive
for both roles".
The line "Input drive or image" displays address and medium status of
the input drive.
Its "Eject" button excutes command -eject "in".
Editing the drive address and pressing the Return key causes the execution
of command -indev with the field content as drive address. Use this to
load the model from ISO image data files on hard disk.
The line "Output drive or image" does about the same for the output drive.
The text input field can be used to address an existing ISO image data
file or to address a data file that does not yet exist. In the latter
case, the ,edium status will be blank.
The "Blank" button executes command -blank "as_needed" on the output drive.
This also applies to ISO image data files, which will get invalidated by
a small write operation.
The "Format" button executes -format "as_needed".
This only applies to real optical drives and s of interest only with DVD-RW
or BD-R media, which both can be used formatted and unformatted. Other media
types which mandatorily need formatting will be formatted by the write
commands.
The "Write ISO session" executes command -commit, which writes a session
with all pending changes to the output drive. The output drive must be
either blank or it must be the same as the input drive.
The "Close" switch controls whether command -close "on" is emitted with
"Write ISO session" or whether -as cdrecord option -multi is omitted with
"Burn image file:".
The "TAO" switch controls whether an incremental write type shall be
enforced with write commands. Normally xorriso will decide by medium status
and job parameters which write type to choose.
The "Defect Mgt" switch controls whether slow and error-prone drive internal
check reading shall be enabled with formatted BD-R or with BD-RE.
The "Burn image file:" button executes command -as "cdrecord" with the
content of its text field as disk file address of a data file that is
to be written to the output drive.
The medium in the drive may be blank or appendable.
------------------------------------------------------------------------
Inspection, manipulation, and exploitation of xorriso ISO image model
The "Extract to disk:" button executes command -extract with the whole
tree of the current ISO directory or with the selected items of the box
underneath "ISO directory:".
This copies the selected files or directory trees from the input drive
to the address on hard disk which is given by the text filed right of
the button.
The "Underneath" switch controls the effective hard disk address of an item
if the address in the text field points to a directory. If "Underneath"
is enabled, then the file object from the ISO filesystem will be copied to its
name underneath the hard disk directory.
If "Underneath" is disabled then an ISO directory tree item will be merged
with the disk directory tree at the given address.
Example:
Selected are "/iso_dir" and "/iso_file".
Address for hard disk is "/tmp/from_iso". Switch "Selected" is enabled.
"Underneath" enabled causes commands:
-extract /iso_dir /tmp/from_iso/iso_dir
-extract /iso_file /tmp/from_iso/iso_file
"Underneath" disabled:
-extract /iso_dir /tmp/from_iso
-extract /iso_file /tmp/from_iso
The last command will fail because /tmp/from_iso already exists as directory.
The "Selected" switch controls whether the whole current ISO directory,
or only the selected items shall be copied to to hard disk.
The "Overwrite files" switch controls whether existing files may be
overwritten in the ISO image or by extraction on hard disk.
The frontend program will only detect the most obvious name collisions,
but xorriso will reliably refuse to overwrite files if this is banned.
The "Overwrite ISO dirs" switch controls whether it is allowed to replace
an ISO directory by a non-directory file.
If a directory is copied to a directory, then both directory trees will
be merged. So this switch applies only to situations where non-directories
hit directories.
The "Enforce disk dir write access" switch enables the options "auto_chmod_on"
and "sort_lba_on". "auto_chmod_on" allows xorriso to give itself temporariy
w-permission to all disk directories which are owned by the xorriso user.
This is not without dangers, of course, but comes in handy with restoring of
backups.
Option "sort_lba_on" reduces head-moves of optical drives and thus can
speed up extraction substantially. It is bound to "auto_chmod_on" because
else it might get in trouble when restoring ISO directories which offer
no w-permission.
The "Refresh avail:" button triggers a time consuming exact prediction
of the free space on the medium in the output drive. For this purpose,
the size of an ISO session with the pending changes is computed.
With image files rather than real optical drives, the free space of
the hosting filesystem is displayed.
The "Insert from disk:" button executes command -map with the disk file
address that is given by the text field right to the button.
The switch "Underneath" has the same effect as with file extraction:
If enabled, a directory from disk will not be unpacked to its single files
but put underneath the target address by its own leaf name.
If the switch "Selected" is enabled, then the given disk file or tree will
be inserted at or underneath the only selected item in the box inderneath
"ISO directory:".
The text field in the "ISO directory:" line displays the current ISO
directory and can be used to toggle its path directly. Hitting the
Return key causes the current directory to change and the display in
the box underneath to be refreshed.
The "Up" buttons move the current ISO directory one directory level up.
The "Verify" button executes -md5_check_r "SORRY" with the current ISO
directory. ISO images bear MD5s for each data file if they were produced
by xorriso with -md5 "on" resp. -for_backup. This frontend enables this
feature on startup.
The list box underneath the "ISO directory:" line displays the files in
the current ISO directory. One or more item can be selected and play a
role with extraction or insertion of files.
Most of the buttons underneath the box operate on the selected items
unconditionally.
The "Verify" button in the "ISO selection:" line executes command
-md5_check_r "SORRY" with each of the selected items.
The "Delete" button executes command -rm_r with each of the selected items.
The "Rename to:" button iuses command -mv to move each of the selected
items to the address that is given by the text field right to the button.
If this address points to an existing ISO directory, then the items will
be moved underneath that directory and keep their leaf names.
Else there may be only one selected item which will be renamed to the
given address.
The "Make dir" button executes command -mkdir with the address in the
text field to its left (the same as used by "Rename to:"). Useful to
create a target directory before moving the selection.

980
frontend/frontend_pipes_xorriso.c Normal file
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@ -0,0 +1,980 @@
/* Beefed-up example from man 2 pipe
to illustrate how xorriso is to be used by frontend programs via two pipes.
Additionally there is a standalone implementation of Xorriso_parse_line().
Copyright 2012 Thomas Schmitt, <scdbackup@gmx.net>
Unaltered provided under BSD license.
You may issue licenses of your choice for derived code, provided that they
do not infringe anybody's right to do the same for this original code.
Build:
cc -g -o frontend_pipes_xorriso frontend_pipes_xorriso.c
Usage:
./frontend_pipes_xorriso [path_to_xorriso_binary | -h]
*/
#include <sys/wait.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
static int usage()
{
static char helptext[][80] = {
"usage: frontend_pipes_xorriso [path_to_xorriso|-h]",
"",
"Forks a process that runs xorriso and communicates with it via two pipes.",
"The command pipe sends payload commands and -mark commands. The reply pipe",
"receives -pkt_output lines which it dispatches to stdout and stderr.",
"The communication between both processes is made synchronous by the parent",
"awaiting the -mark message of the child.",
"Optionally the reply lines can be parsed into words. This is initiated by",
"meta command",
" @parse [prefix [separators [max_words [flag]]]]",
"which sets the four parameters for a function equivalent to",
"Xorriso_parse_line() (see xorriso.h). All reply will then be parsed and",
"non-empty word arrays are displayed. Meta command",
" @noparse",
"ends this mode.",
"Meta command",
" @drain_sieve",
"reports all recorded results of all installed message sieve filter rules.",
"For illustration perform this xorriso command sequence",
" -msg_op start_sieve - -outdev /dev/sr0 -msg_op clear_sieve - -toc",
"and then @drain_sieve.",
"@END@"
};
int i;
for (i = 0; strcmp(helptext[i], "@END@") != 0; i++)
fprintf(stderr, "%s\n", helptext[i]);
return(1);
}
/* Local helpers of parent process */
struct boss_state {
/* What the parent needs to know about its connection to xorriso */
/* The ends of the dialog pipes */
int command_fd;
int reply_fd;
/* For synchronization between boss and xorriso */
int mark_count;
char pending_mark[16];
/* Parsing_parameters. See xorriso.h Xorriso_parse_line */
int do_parse;
char progname[1024];
char prefix[1024];
char separators[256];
int max_words;
int flag;
/* A primitive catcher for result lines */
int reply_lines_size; /* 0= catching disabled */
char **reply_lines;
int reply_lines_count;
};
#define Frontend_xorriso_max_resulT 1000
/* Some basic gestures of this program: */
static int prompt_for_command(struct boss_state *boss,
char *line, int line_size);
static int transmit_command(struct boss_state *boss, char *line);
static int await_all_replies(struct boss_state *boss);
static int de_pkt_result(struct boss_state *boss);
static int drain_sieve(struct boss_state *boss);
int parse_line(char *progname, char *line,
char *prefix, char *separators, int max_words,
int *argc, char ***argv, int flag);
int dispose_parsed_words(int *argc, char ***argv);
/* Parent and child */
int main(int argc, char *argv[])
{
int command_pipe[2], reply_pipe[2];
pid_t cpid;
char *xorriso_path = "/usr/bin/xorriso";
if (argc > 1) {
if (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "-help") == 0 ||
strcmp(argv[1], "--help") == 0) {
usage();
exit(0);
}
xorriso_path = argv[1];
}
if (pipe(command_pipe) == -1)
{ perror("pipe"); exit(1); }
if (pipe(reply_pipe) == -1)
{ perror("pipe"); exit(1); }
cpid = fork();
if (cpid == -1)
{ perror("fork"); exit(2); }
if (cpid == 0) {
/* Child redirects stdin and stdout. Then it becomes xorriso. */
char *xargv[8];
close(command_pipe[1]); /* Close unused write end */
close(reply_pipe[0]); /* Close unused read end */
/* Attach pipe ends to stdin and stdout */
close(0);
if (dup2(command_pipe[0], 0) == -1)
{ perror("dup2(,0)"); exit(1); }
close(1);
if (dup2(reply_pipe[1], 1) == -1)
{ perror("dup2(,1)"); exit(1); }
xargv[0] = xorriso_path;
xargv[1] = "-dialog";
xargv[2] = "on";
xargv[3] = "-pkt_output";
xargv[4] = "on";
xargv[5] = "-mark";
xargv[6] = "0"; /* corresponds to mark_count = 0 in parent */
xargv[7] = NULL;
execv(xorriso_path, xargv);
perror("execv"); exit(1);
} else {
/* Parent prompts user for command lines and prints xorriso replies.
It knows when all reply text of the pending command line has arrived
by watching for -mark reply pending_mark.
*/
int ret;
char line[4096];
struct boss_state boss;
close(command_pipe[0]); /* Close unused read end */
close(reply_pipe[1]); /* Close unused write end */
memset(&boss, 0, sizeof(boss));
boss.command_fd = command_pipe[1];
boss.reply_fd = reply_pipe[0];
strcpy(boss.progname, argv[0]);
boss.reply_lines = NULL;
/* Dialog loop */
sprintf(boss.pending_mark, "%d", boss.mark_count);
while (1) {
/* Wait for pending mark and print all replies */
ret = await_all_replies(&boss);
if (ret < 0)
break;
/* Prompt for command line */
ret = prompt_for_command(&boss, line, sizeof(line));
if (ret <= 0)
break;
/* Send line and -mark command */
ret = transmit_command(&boss, line);
if (ret <= 0)
break;
}
/* >>> if child is still operational: send -rollback_end */;
/* >>> wait a short while */;
/* >>> if not yet ended: kill child */;
wait(NULL); /* Wait for child */
exit(0);
}
}
/* ------------------- Local helpers of parent process -------------------- */
static int show_parsed(struct boss_state *boss, char *line);
static int record_reply_line(struct boss_state *boss, char *line);
static int make_reply_lines(struct boss_state *boss);
static int input_interpreter(char *line, struct boss_state *boss);
/* Ask the user for command input and trigger processing of meta commands.
*/
static int prompt_for_command(struct boss_state *boss,
char *line, int line_size)
{
int l, ret;
char *line_res;
while (1) {
fprintf(stderr, "+++ Enter a command and its parameters :\n");
line_res = fgets(line, line_size - 1, stdin);
if (line_res == NULL)
return(0);
l = strlen(line);
if (l == 0) {
line[0] = '\n';
line[1] = 0;
} else if (line[l - 1] != '\n') {
line[l] = '\n';
line[l + 1] = 0;
}
/* Interpret meta commands which begin by @ */
ret = input_interpreter(line, boss);
if (ret == 0)
return(1);
if (ret < 0)
return(-1);
}
}
/* Transmit a command (which must end by white space, e.g. newline)
and its unique synchronization mark.
*/
static int transmit_command(struct boss_state *boss, char *line)
{
int ret;
char mark_line[32];
ret = write(boss->command_fd, line, strlen(line));
if (ret == -1) {
perror("write");
return(0);
}
/* Produce new unique -mark text to watch for */
(boss->mark_count)++;
sprintf(boss->pending_mark, "%d", boss->mark_count);
sprintf(mark_line, "-mark %s\n", boss->pending_mark);
ret = write(boss->command_fd, mark_line, strlen(mark_line));
if (ret == -1) {
perror("write");
return(0);
}
return(1);
}
/* Read reply messages from xorriso and wait for the expected synchronization
mark. Messages can be printed or collected in boss->reply_lines.
*/
static int await_all_replies(struct boss_state *boss)
{
int count, remainder = 0, ret;
char buf[32769], *line, *npt;
while (1) {
count = read(boss->reply_fd, buf + remainder,
sizeof(buf) - 1 - remainder);
if (count == -1) {
perror("read");
return(-1);
}
if (count == 0) {
fprintf(stderr, "+++ EOF encounterd by Master process\n");
return(-2);
}
for (npt = buf + remainder; npt < buf + count; npt++) {
if (*npt == 0) {
fprintf(stderr,
"+++ Protocol error : Reply contains 0-chars\n");
return(-1);
}
}
/* Split buf into lines */
buf[remainder + count] = 0; /* for convenience */
line = buf;
while (1) {
npt = strchr(line, '\n');
if (npt == NULL) {
/* Move line to start of buffer and set remainder */
if (line != buf) {
remainder = 0;
for (npt = line; *npt; npt++)
buf[remainder++] = *npt;
}
/* Now read more data in the hope to get a newline char */
break;
}
/* Interpret line */
*npt = 0;
if (line[0] == 'M') {
/* M-replies will be outdated until the pending command line
is completely done and the appended -mark command gets
into effect.
*/
if (strlen(line) < 6) {
fprintf(stderr,
"+++ Protocol error : M-channel line shorter than 6 chars\n");
return(-1);
}
if (strcmp(line + 5, boss->pending_mark) == 0) {
if ((line - buf) + strlen(line) + 1 < count) {
fprintf(stderr,
"+++ Protocol error : Surplus reply data after M-match\n");
fprintf(stderr, "%s\n", line + strlen(line) + 1);
return(-1);
}
return (1); /* Expected mark has arrived */
}
} else if (line[0] == 'R') {
/* R-replies are result lines of inquiry commands, like -ls.
They should be handled by specialized code which knows
how to parse and interpret them.
*/
if (boss->reply_lines_count < boss->reply_lines_size) {
ret = record_reply_line(boss, line);
if (ret <= 0)
return(ret);
} else
printf("%s\n", line);
} else {
/* I-replies are pacifiers, notifications, warnings, or
error messages. They should be handled by a general
message interpreter which determines their severity
and decides whether to bother the user.
*/
if (boss->reply_lines_count < boss->reply_lines_size) {
ret = record_reply_line(boss, line);
if (ret <= 0)
return(ret);
} else
fprintf(stderr, "%s\n", line);
}
/* Parse line and show words */
if (strlen(line) >= 5)
show_parsed(boss, line + 5);
line = npt + 1;
}
}
return(1);
}
/* Throw away I channel.
Unpack and reconstruct payload of R channel lines.
*/
static int de_pkt_result(struct boss_state *boss)
{
int i, l, w;
char *payload = NULL, *new_payload = NULL;
w = 0;
for (i = 0; i < boss->reply_lines_count; i++) {
if (boss->reply_lines[i][0] != 'R' ||
strlen(boss->reply_lines[i]) < 5)
continue;
if (payload == NULL) {
payload = strdup(boss->reply_lines[i] + 5);
} else {
l = strlen(payload);
new_payload = calloc(l + strlen(boss->reply_lines[i] + 5) + 1, 1);
if (new_payload == NULL)
goto no_mem;
strcpy(new_payload, payload);
strcpy(new_payload + l, boss->reply_lines[i] + 5);
free(payload);
payload = new_payload;
}
if (payload == NULL)
goto no_mem;
l = strlen(payload);
if (l > 0)
if (payload[l - 1] == '\n')
payload[l - 1] = 0;
if (boss->reply_lines[i][2] != '0') {
free(boss->reply_lines[w]);
boss->reply_lines[w] = payload;
w++;
payload = NULL;
}
}
for (i = w ; i < boss->reply_lines_count; i++) {
free(boss->reply_lines[i]);
boss->reply_lines[i] = NULL;
}
boss->reply_lines_count = w;
return(1);
no_mem:;
fprintf(stderr, "FATAL: Out of memory !\n");
return(-1);
}
/* Inquire and print all recorded message sieve results.
*/
static int drain_sieve(struct boss_state *boss)
{
int ret, i, j, names_size = 0, names_count = 0, first_result;
int number_of_strings, available, xorriso_ret, number_of_lines, k, r;
char **names = NULL, line[1024];
/* Install catcher for reply_lines */
ret = make_reply_lines(boss);
if (ret <= 0)
goto ex;
boss->reply_lines_size = Frontend_xorriso_max_resulT;
boss->reply_lines_count = 0;
/* Get list of filter rule names from -msg_op show_sieve */
ret = transmit_command(boss, "-msg_op show_sieve -\n");
if (ret <= 0)
goto ex;
ret = await_all_replies(boss);
if (ret <= 0)
goto ex;
ret = de_pkt_result(boss);
if (ret <= 0)
goto ex;
names = boss->reply_lines;
boss->reply_lines = NULL;
names_size = Frontend_xorriso_max_resulT;
names_count= boss->reply_lines_count;
ret = make_reply_lines(boss);
if (ret <= 0)
goto ex;
boss->reply_lines_size = Frontend_xorriso_max_resulT;
/* Inquire caught results of each name by -msg_op read_sieve
until return value is <= 0
*/
printf("--------------------------------------------------\n");
for (i = 0; i < names_count; i++) {
available = 1;
first_result = 1;
while (available > 0) {
boss->reply_lines_count = 0;
sprintf(line, "-msg_op read_sieve '%s'\n", names[i]);
ret = transmit_command(boss, line);
if (ret <= 0)
goto ex;
ret = await_all_replies(boss);
if (ret <= 0)
goto ex;
ret = de_pkt_result(boss);
if (ret <= 0)
goto ex;
if (boss->reply_lines_count < 2) {
fprintf(stderr, "drain_sieve: illegible result reply\n");
{ret= 0; goto ex;}
}
xorriso_ret = -1;
sscanf(boss->reply_lines[0], "%d", &xorriso_ret);
if(xorriso_ret <= 0)
break;
number_of_strings = -1;
sscanf(boss->reply_lines[1], "%d", &number_of_strings);
if(xorriso_ret < 0)
break;
if (first_result)
printf(" '%s' |\n", names[i]);
first_result = 0;
for (j = 0; names[i][j] != 0; j++)
printf("-");
printf("-----\n");
r = 2;
for (j = 0; j < number_of_strings && r < boss->reply_lines_count;
j++) {
number_of_lines = -1;
sscanf(boss->reply_lines[r], "%d", &number_of_lines);
r++;
printf("|");
for (k = 0; k < number_of_lines
&& r < boss->reply_lines_count; k++) {
printf("%s%s", boss->reply_lines[r],
k < number_of_lines - 1 ? "\n" : "");
r++;
}
printf("|\n");
}
}
if (first_result == 0)
printf("--------------------------------------------------\n");
}
/* Dispose all recorded results */
ret = transmit_command(boss, "-msg_op clear_sieve -\n");
if (ret <= 0)
goto ex;
ret = await_all_replies(boss);
if (ret <= 0)
goto ex;
ret = 1;
ex:;
/* Disable result catcher */
boss->reply_lines_size = 0;
if (names != NULL)
dispose_parsed_words(&names_size, &names);
return(ret);
}
/* ------------------------- Helpers of local helpers ---------------------- */
static int show_parsed(struct boss_state *boss, char *line)
{
int argc, ret = 0, i;
char **argv = NULL;
if (!boss->do_parse)
return(2);
ret = parse_line(boss->progname, line, boss->prefix, boss->separators,
boss->max_words, &argc, &argv, boss->flag);
if (ret <= 0 || argc <= 0)
return(0);
fprintf(stderr, "-----------------------------------------------------\n");
fprintf(stderr, "parse_line returns %d, argc = %d\n", ret, argc);
for (i = 0; i < argc; i++)
fprintf(stderr, "%2d : %s\n", i, argv[i]);
fprintf(stderr, "-----------------------------------------------------\n");
dispose_parsed_words(&argc, &argv); /* release memory */
return(1);
}
static int make_reply_lines(struct boss_state *boss)
{
int i;
if (boss->reply_lines != NULL)
return(1);
boss->reply_lines = calloc(Frontend_xorriso_max_resulT,
sizeof(char *));
if (boss->reply_lines == 0) {
fprintf(stderr, "FATAL: Out of memory !\n");
return(-1);
}
boss->reply_lines_count = 0;
boss->reply_lines_size = 0;
for (i = 0; i < Frontend_xorriso_max_resulT; i++)
boss->reply_lines[i] = NULL;
return(1);
}
static int record_reply_line(struct boss_state *boss, char *line)
{
if (boss->reply_lines[boss->reply_lines_count] != NULL)
free(boss->reply_lines[boss->reply_lines_count]);
boss->reply_lines[boss->reply_lines_count] = strdup(line);
if (boss->reply_lines[boss->reply_lines_count] == NULL) {
fprintf(stderr, "FATAL: Out of memory !\n");
return(-1);
}
boss->reply_lines_count++;
return(1);
}
static int input_interpreter(char *line, struct boss_state *boss)
{
int argc, ret = 0;
char **argv = NULL;
ret = parse_line(boss->progname, line, "", "", 6, &argc, &argv, 0);
if (ret <= 0 || argc <= 0)
return(0);
if (strcmp(argv[0], "@parse") == 0) {
boss->do_parse = 1;
boss->prefix[0] = 0;
if (argc > 1)
strcpy(boss->prefix, argv[1]);
boss->separators[0] = 0;
if (argc > 2)
strcpy(boss->separators, argv[2]);
boss->max_words = 0;
if (argc > 3)
sscanf(argv[3], "%d", &(boss->max_words));
boss->max_words = 0;
if (argc > 4)
sscanf(argv[4], "%d", &(boss->flag));
ret = 1;
} else if(strcmp(argv[0], "@noparse") == 0) {
boss->do_parse = 0;
ret = 1;
} else if(strcmp(argv[0], "@drain_sieve") == 0) {
ret= drain_sieve(boss);
} else {
ret = 0;
}
dispose_parsed_words(&argc, &argv); /* release memory */
return ret;
}
/* -------- Line-to-word parser equivalent to Xorriso_parse_line() -------- */
static int Sfile_sep_make_argv(char *progname, char *line, char *separators,
int max_words, int *argc, char ***argv, int flag);
int parse_line(char *progname, char *line,
char *prefix, char *separators, int max_words,
int *argc, char ***argv, int flag)
{
int ret, bsl_mode;
char *to_parse;
*argc = 0;
*argv = NULL;
to_parse = line;
bsl_mode = (flag >> 1) & 15;
if (prefix[0]) {
if (strncmp(line, prefix, strlen(prefix)) == 0) {
to_parse = line + strlen(prefix);
} else {
ret = 2; goto ex;
}
}
ret = Sfile_sep_make_argv(progname, to_parse, separators,
max_words, argc, argv,
(!(flag & 32)) | 4 | (bsl_mode << 5));
if (ret < 0) {
fprintf(stderr,
"%s : Severe lack of resources during command line parsing\n",
progname);
goto ex;
}
if (ret == 0) {
fprintf(stderr,
"%s : Incomplete quotation in %s line: %s\n",
progname, (flag & 32) ? "command" : "parsed", to_parse);
goto ex;
}
ex:;
if (ret <= 0)
Sfile_sep_make_argv("", "", "", 0, argc, argv, 2); /* release memory */
return(ret);
}
int dispose_parsed_words(int *argc, char ***argv)
{
Sfile_sep_make_argv("", "", "", 0, argc, argv, 2);
return(1);
}
/* -------------- Some helpers copied from xorriso/sfile.c ----------------- */
static int Sfile_destroy_argv(int *argc, char ***argv, int flag)
{
int i;
if(*argc>0 && *argv!=NULL){
for(i=0;i<*argc;i++){
if((*argv)[i]!=NULL)
free((*argv)[i]);
}
free((char *) *argv);
}
*argc= 0;
*argv= NULL;
return(1);
}
/* Converts backslash codes into single characters:
\a BEL 7 , \b BS 8 , \e ESC 27 , \f FF 12 , \n LF 10 , \r CR 13 ,
\t HT 9 , \v VT 11 , \\ \ 92
\[0-9][0-9][0-9] octal code , \x[0-9a-f][0-9a-f] hex code ,
\cX control-x (ascii(X)-64)
@param upto maximum number of characters to examine for backslash.
The scope of a backslash (0 to 3 characters) is not affected.
@param eaten returns the difference in length between input and output
@param flag bit0= only determine *eaten, do not convert
bit1= allow to convert \000 to binary 0
*/
static int Sfile_bsl_interpreter(char *text, int upto, int *eaten, int flag)
{
char *rpt, *wpt, num_text[8], wdummy[8];
unsigned int num= 0;
*eaten= 0;
wpt= text;
for(rpt= text; *rpt != 0 && rpt - text < upto; rpt++) {
if(flag & 1)
wpt= wdummy;
if(*rpt == '\\') {
rpt++;
(*eaten)++;
if(*rpt == 'a') {
*(wpt++)= 7;
} else if(*rpt == 'b') {
*(wpt++)= 8;
} else if(*rpt == 'e') {
*(wpt++)= 27;
} else if(*rpt == 'f') {
*(wpt++)= 12;
} else if(*rpt == 'n') {
*(wpt++)= 10;
} else if(*rpt == 'r') {
*(wpt++)= 13;
} else if(*rpt == 't') {
*(wpt++)= 9;
} else if(*rpt == 'v') {
*(wpt++)= 11;
} else if(*rpt == '\\') {
*(wpt++)= '\\';
} else if(rpt[0] >= '0' && rpt[0] <= '7' &&
rpt[1] >= '0' && rpt[1] <= '7' &&
rpt[2] >= '0' && rpt[2] <= '7') {
num_text[0]= '0';
num_text[1]= *(rpt + 0);
num_text[2]= *(rpt + 1);
num_text[3]= *(rpt + 2);
num_text[4]= 0;
sscanf(num_text, "%o", &num);
if((num > 0 || (flag & 2)) && num <= 255) {
rpt+= 2;
(*eaten)+= 2;
*(wpt++)= num;
} else
goto not_a_code;
} else if(rpt[0] == 'x' &&
((rpt[1] >= '0' && rpt[1] <= '9') ||
(rpt[1] >= 'A' && rpt[1] <= 'F') ||
(rpt[1] >= 'a' && rpt[1] <= 'f'))
&&
((rpt[2] >= '0' && rpt[2] <= '9') ||
(rpt[2] >= 'A' && rpt[2] <= 'F') ||
(rpt[2] >= 'a' && rpt[2] <= 'f'))
) {
num_text[0]= *(rpt + 1);
num_text[1]= *(rpt + 2);
num_text[2]= 0;
sscanf(num_text, "%x", &num);
if(num > 0 && num <= 255) {
rpt+= 2;
(*eaten)+= 2;
*(wpt++)= num;
} else
goto not_a_code;
} else if(*rpt == 'c') {
if(rpt[1] > 64 && rpt[1] < 96) {
*(wpt++)= rpt[1] - 64;
rpt++;
(*eaten)++;
} else
goto not_a_code;
} else {
not_a_code:;
*(wpt++)= '\\';
rpt--;
(*eaten)--;
}
} else
*(wpt++)= *rpt;
}
*wpt= *rpt;
return(1);
}
#define SfileadrL 4096
static int Sfile_sep_make_argv(char *progname, char *line, char *separators,
int max_words, int *argc, char ***argv, int flag)
/*
bit0= read progname as first argument from line
bit1= just release argument list argv and return
bit2= abort with return(0) if incomplete quotes are found
bit3= eventually prepend missing '-' to first argument read from line
bit4= like bit2 but only check quote completeness, do not allocate memory
bit5+6= interpretation of backslashes:
0= no interpretation, leave unchanged
1= only inside double quotes
2= outside single quotes
3= everywhere
bit7= append a NULL element to argv
*/
{
int i,pass,maxl=0,l,argzaehl=0,bufl,line_start_argc, bsl_mode, ret= 0, eaten;
char *cpt,*start;
char *buf= NULL;
Sfile_destroy_argv(argc,argv,0);
if(flag&2)
{ret= 1; goto ex;}
if(flag & 16)
flag|= 4;
bsl_mode= (flag >> 5) & 3;
buf= calloc(strlen(line) + SfileadrL, 1);
if(buf == NULL)
{ret= -1; goto ex;}
for(pass=0;pass<2;pass++) {
cpt= line-1;
if(!(flag&1)){
argzaehl= line_start_argc= 1;
if(pass==0)
maxl= strlen(progname);
else
strcpy((*argv)[0],progname);
} else {
argzaehl= line_start_argc= 0;
if(pass==0) maxl= 0;
}
while(*(++cpt)!=0){
if(*separators) {
if(strchr(separators, *cpt) != NULL)
continue;
} else if(isspace(*cpt))
continue;
start= cpt;
buf[0]= 0;
cpt--;
if(max_words > 0 && argzaehl >= max_words && *cpt != 0) {
/* take uninterpreted up to the end */
cpt+= strlen(cpt) - 1;
}
while(*(++cpt)!=0) {
if(*separators) {
if(strchr(separators, *cpt) != NULL)
break;
} else if(isspace(*cpt))
break;
if(*cpt=='"'){
l= cpt-start; bufl= strlen(buf);
if(l>0) {
strncpy(buf + bufl, start, l); buf[bufl + l]= 0;
if(bsl_mode >= 3) {
ret= Sfile_bsl_interpreter(buf, l, &eaten, 0);
if(ret <= 0)
goto ex;
}
}
l= strlen(buf);
start= cpt+1;
while(*(++cpt)!=0) if(*cpt=='"') break;
if((flag&4) && *cpt==0)
{ret= 0; goto ex;}
l= cpt-start; bufl= strlen(buf);
if(l>0) {
strncpy(buf + bufl, start, l);
buf[bufl + l]= 0;
if(bsl_mode >= 1) {
ret= Sfile_bsl_interpreter(buf + bufl, l, &eaten, 0);
if(ret <= 0)
goto ex;
}
}
start= cpt+1;
}else if(*cpt=='\''){
l= cpt-start; bufl= strlen(buf);
if(l>0) {
strncpy(buf + bufl, start, l); buf[bufl + l]= 0;
if(bsl_mode >= 3) {
ret= Sfile_bsl_interpreter(buf, l, &eaten, 0);
if(ret <= 0)
goto ex;
}
}
l= strlen(buf);
start= cpt+1;
while(*(++cpt)!=0) if(*cpt=='\'') break;
if((flag&4) && *cpt==0)
{ret= 0; goto ex;}
l= cpt-start; bufl= strlen(buf);
if(l>0) {
strncat(buf,start,l);buf[bufl+l]= 0;
if(bsl_mode >= 2) {
ret= Sfile_bsl_interpreter(buf + bufl, l, &eaten, 0);
if(ret <= 0)
goto ex;
}
}
start= cpt+1;
}
if(*cpt==0) break;
}
l= cpt-start;
bufl= strlen(buf);
if(l>0) {
strncpy(buf + bufl, start, l); buf[bufl + l]= 0;
if(bsl_mode >= 3) {
ret= Sfile_bsl_interpreter(buf, l, &eaten, 0);
if(ret <= 0)
goto ex;
}
}
l= strlen(buf);
if(pass==0){
if(argzaehl==line_start_argc && (flag&8))
if(buf[0]!='-' && buf[0]!=0 && buf[0]!='#')
l++;
if(l>maxl) maxl= l;
}else{
strcpy((*argv)[argzaehl],buf);
if(argzaehl==line_start_argc && (flag&8))
if(buf[0]!='-' && buf[0]!=0 && buf[0]!='#')
sprintf((*argv)[argzaehl],"-%s", buf);
}
argzaehl++;
if(*cpt==0) break;
}
if(pass==0){
if(flag & 16)
{ret= 1; goto ex;}
*argc= argzaehl;
if(argzaehl>0 || (flag & 128)) {
*argv= (char **) calloc((argzaehl + !!(flag & 128)), sizeof(char *));
if(*argv==NULL)
{ret= -1; goto ex;}
}
for(i=0;i<*argc;i++) {
(*argv)[i]= (char *) calloc(maxl + 1, 1);
if((*argv)[i]==NULL)
{ret= -1; goto ex;}
}
if(flag & 128)
(*argv)[*argc]= NULL;
}
}
ret= 1;
ex:
if(buf != NULL)
free(buf);
return(ret);
}

3223
frontend/xorriso-tcltk Executable file
View File

File diff suppressed because it is too large Load Diff

26
xorriso/README_gnu_xorriso
View File

@ -142,6 +142,32 @@ closing it immediately, waiting, and only then opening it for real:
CFLAGS="$CFLAGS -DLibburn_udev_extra_open_cyclE -DLibburn_udev_wait_useC=500000"
xorriso under control of a (GUI) frontend process
The dialog mode allows frontend programs to connect via pipes to the standard
input and output of xorriso. Several commands of xorriso help with receiving
and parsing of reply messages.
As a proof of concept, there is the Tcl/Tk script xorriso-tcltk which can
be launched by this shell command in the directory where xorriso was built:
xorriso/xorriso -launch_frontend frontend/xorriso-tcltk --stdio --
resp. after installation:
xorriso -launch_frontend $(which xorriso-tcltk) --stdio --
See file frontend/README-tcltk for a description of its GUI.
See its Tcl code for getting an idea how this gets achieved.
Further there is the C program frontend/frontend_pipes_xorriso.c which
forks a xorriso process and shows the same communication gestures as
xorriso-tcltk.
In particular it connects to xorriso via two pipes, sends commands, waits
for all replies of a command, picks info out of the xorriso message sieve,
and parses reply message lines into words.
Drives and Disk File Objects
The user of libisoburn applications needs rw-permission for the CD/DVD/BD

8
xorriso/make_xorriso_standalone.sh
View File

@ -231,9 +231,15 @@ copy_files doc/partition_offset.wiki \
create_dir "$lone_dir"/test
copy_files \
test/compare_file.c \
test/frontend_pipes_xorriso.c \
"$lone_dir"/test
create_dir "$lone_dir"/frontend
copy_files \
frontend/frontend_pipes_xorriso.c \
frontend/README-tcltk \
frontend/xorriso-tcltk \
"$lone_dir"/frontend
# releng

9
xorriso/xorriso_makefile_am.txt
View File

@ -237,6 +237,7 @@ noinst_PROGRAMS = \
test/compare_file \
xorriso/make_xorriso_1
# A program to compare two trees of files in mounted filesystems
# To compare tree /media/dvd and /original/dir :
# find /media/dvd -exec test/compare_file '{}' /media/dvd /original/dir ';'
@ -254,6 +255,11 @@ xorriso_make_xorriso_1_LDADD =
xorriso_make_xorriso_1_SOURCES = xorriso/make_xorriso_1.c
# A Proof-of-concept for frontends
bin_SCRIPTS = \
frontend/xorriso-tcltk
# Install symbolic links to the xorriso binary
#
install-exec-hook:
@ -328,7 +334,8 @@ EXTRA_DIST = \
doc/susp_aaip_isofs_names.txt \
doc/zisofs_format.txt \
doc/startup_file.txt \
test/frontend_pipes_xorriso.c \
frontend/frontend_pipes_xorriso.c \
frontend/README-tcltk \
libisofs/aaip-os-dummy.c \
libisofs/aaip-os-linux.c \
libisofs/aaip-os-freebsd.c \