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/*
* BRLTTY - A background process providing access to the console screen (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2024 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU Lesser General Public License, as published by the Free Software
* Foundation; either version 2.1 of the License, or (at your option) any
* later version. Please see the file LICENSE-LGPL for details.
*
* Web Page: http://brltty.app/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include <string.h>
#include "log.h"
#include "strfmt.h"
#include "hostcmd.h"
#if defined(USE_PKG_HOSTCMD_NONE)
#include "hostcmd_none.h"
#elif defined(USE_PKG_HOSTCMD_UNIX)
#include "hostcmd_unix.h"
#elif defined(USE_PKG_HOSTCMD_WINDOWS)
#include "hostcmd_windows.h"
#else /* host command package */
#warning host command package not selected
#include "hostcmd_none.h"
#endif /* host command package */
#include "hostcmd_internal.h"
int
finishHostCommandStream (HostCommandStream *hcs, int fileDescriptor) {
const char *mode = hcs->isInput? "w": "r";
if ((**hcs->streamVariable = fdopen(fileDescriptor, mode))) {
return 1;
} else {
logSystemError("fdopen");
}
return 0;
}
int
processHostCommandStreams (
HostCommandStream *hcs,
HostCommandStreamProcessor *processStream,
void *data
) {
while (hcs->streamVariable) {
if (*hcs->streamVariable) {
if (!processStream(hcs, data)) {
return 0;
}
}
hcs += 1;
}
return 1;
}
void
initializeHostCommandOptions (HostCommandOptions *options) {
memset(options, 0, sizeof(*options));
options->asynchronous = 0;
options->standardInput = NULL;
options->standardOutput = NULL;
options->standardError = NULL;
}
static int
constructHostCommandStream (HostCommandStream *hcs, void *data) {
**hcs->streamVariable = NULL;
return constructHostCommandPackageData(&hcs->package);
}
static int
destructHostCommandStream (HostCommandStream *hcs, void *data) {
destructHostCommandPackageData(&hcs->package);
if (**hcs->streamVariable) {
fclose(**hcs->streamVariable);
**hcs->streamVariable = NULL;
}
return 1;
}
int
runHostCommand (
const char *const *command,
const HostCommandOptions *options
) {
int result = 0XFF;
HostCommandOptions defaults;
if (!options) {
initializeHostCommandOptions(&defaults);
options = &defaults;
}
{
char buffer[0X100];
STR_BEGIN(buffer, sizeof(buffer));
{
const char *const *argument = command;
while (*argument) STR_PRINTF(" %s", *argument++);
}
STR_END;
logMessage(LOG_DEBUG, "starting host command:%s", buffer);
}
{
HostCommandStream streams[] = {
{ .streamVariable = &options->standardInput,
.fileDescriptor = 0,
.isInput = 1
},
{ .streamVariable = &options->standardOutput,
.fileDescriptor = 1,
.isInput = 0
},
{ .streamVariable = &options->standardError,
.fileDescriptor = 2,
.isInput = 0
},
{ .streamVariable = NULL }
};
if (processHostCommandStreams(streams, constructHostCommandStream, NULL)) {
int ok = 0;
if (processHostCommandStreams(streams, prepareHostCommandStream, NULL)) {
if (runCommand(&result, command, streams, options->asynchronous)) {
ok = 1;
}
}
if (!ok) processHostCommandStreams(streams, destructHostCommandStream, NULL);
}
}
return result;
}
int
executeHostCommand (const char *const *command) {
return runHostCommand(command, NULL);
}
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