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helper.c
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helper.c
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#include "helper.h"
#include "common.h"
#include <dbus/dbus.h>
#include <vdr/plugin.h>
#include <sys/wait.h>
#include <unistd.h>
cString cDBusHelper::_pluginConfigDir;
bool cDBusHelper::IsValidUtf8(const char *text)
{
int na = 0;
int nb = 0;
const char *c;
for (c = text; *c; c += (nb + 1)) {
if ((*c & 0x80) == 0x00)
nb = 0;
else if ((*c & 0xc0) == 0x80)
return false;
else if ((*c & 0xe0) == 0xc0)
nb = 1;
else if ((*c & 0xf0) == 0xe0)
nb = 2;
else if ((*c & 0xf8) == 0xf0)
nb = 3;
else if ((*c & 0xfc) == 0xf8)
nb = 4;
else if ((*c & 0xfe) == 0xfc)
nb = 5;
for (na = 1; *(c + na) && (na <= nb); na++) {
if ((*(c + na) & 0xc0) != 0x80)
return false;
}
}
return true;
}
void cDBusHelper::ToUtf8(cString &text)
{
if ((cCharSetConv::SystemCharacterTable() == NULL) || (strcmp(cCharSetConv::SystemCharacterTable(), "UTF-8") == 0)) {
if (!cDBusHelper::IsValidUtf8(*text)) {
static const char *fromCharSet = "ISO6937";
static const char *charSetOverride = getenv("VDR_CHARSET_OVERRIDE");
if (charSetOverride)
fromCharSet = charSetOverride;
d4syslog("dbus2vdr: ToUtf8: create charset converter from %s to UTF-8", fromCharSet);
static cCharSetConv converter(fromCharSet);
static cMutex mutex;
mutex.Lock();
text = converter.Convert(*text);
mutex.Unlock();
}
}
else {
d4syslog("dbus2vdr: ToUtf8: create charset converter to UTF-8");
static cCharSetConv converter(NULL, "UTF-8");
static cMutex mutex;
mutex.Lock();
text = converter.Convert(*text);
mutex.Unlock();
}
}
void cDBusHelper::AddKeyDouble(GVariantBuilder *Array, const char *Key, double Value)
{
GVariantBuilder *element = g_variant_builder_new(G_VARIANT_TYPE("(sv)"));
g_variant_builder_add(element, "s", Key);
GVariantBuilder *variant = g_variant_builder_new(G_VARIANT_TYPE("v"));
g_variant_builder_add(variant, "d", Value);
g_variant_builder_add_value(element, g_variant_builder_end(variant));
g_variant_builder_add_value(Array, g_variant_builder_end(element));
g_variant_builder_unref(variant);
g_variant_builder_unref(element);
}
void cDBusHelper::AddKeyValue(GVariantBuilder *Array, const char *Key, const gchar *Type, void **Value)
{
GVariantBuilder *element = g_variant_builder_new(G_VARIANT_TYPE("(sv)"));
g_variant_builder_add(element, "s", Key);
GVariantBuilder *variant = g_variant_builder_new(G_VARIANT_TYPE("v"));
g_variant_builder_add(variant, Type, *Value);
g_variant_builder_add_value(element, g_variant_builder_end(variant));
g_variant_builder_add_value(Array, g_variant_builder_end(element));
g_variant_builder_unref(variant);
g_variant_builder_unref(element);
}
void cDBusHelper::SendReply(GDBusMethodInvocation *Invocation, int ReplyCode, const char *ReplyMessage)
{
GVariantBuilder *builder = g_variant_builder_new(G_VARIANT_TYPE("(is)"));
g_variant_builder_add(builder, "i", ReplyCode);
g_variant_builder_add(builder, "s", ReplyMessage);
g_dbus_method_invocation_return_value(Invocation, g_variant_builder_end(builder));
g_variant_builder_unref(builder);
}
cExitPipe::cExitPipe(void)
{
pid = -1;
f = NULL;
}
cExitPipe::~cExitPipe()
{
Close();
}
bool cExitPipe::Open(const char *Command, const char *Mode)
{
int fd[2];
if (pipe(fd) < 0) {
LOG_ERROR;
return false;
}
if ((pid = fork()) < 0) { // fork failed
LOG_ERROR;
close(fd[0]);
close(fd[1]);
return false;
}
const char *mode = "w";
int iopipe = 0;
if (pid > 0) { // parent process
if (strcmp(Mode, "r") == 0) {
mode = "r";
iopipe = 1;
}
close(fd[iopipe]);
if ((f = fdopen(fd[1 - iopipe], mode)) == NULL) {
LOG_ERROR;
close(fd[1 - iopipe]);
}
return f != NULL;
}
else { // child process
int iofd = STDOUT_FILENO;
if (strcmp(Mode, "w") == 0) {
mode = "r";
iopipe = 1;
iofd = STDIN_FILENO;
}
close(fd[iopipe]);
if (dup2(fd[1 - iopipe], iofd) == -1) { // now redirect
LOG_ERROR;
close(fd[1 - iopipe]);
_exit(-1);
}
else {
int MaxPossibleFileDescriptors = getdtablesize();
for (int i = STDERR_FILENO + 1; i < MaxPossibleFileDescriptors; i++)
close(i); //close all dup'ed filedescriptors
if (execl("/bin/sh", "sh", "-c", Command, NULL) == -1) {
LOG_ERROR_STR(Command);
close(fd[1 - iopipe]);
_exit(-1);
}
}
_exit(0);
}
}
int cExitPipe::Close(void)
{
int ret = -1;
if (f) {
fclose(f);
f = NULL;
}
if (pid > 0) {
int status = 0;
int i = 5;
while (i > 0) {
ret = waitpid(pid, &status, WNOHANG);
if (ret < 0) {
if (errno != EINTR && errno != ECHILD) {
LOG_ERROR;
break;
}
}
else if (ret == pid)
break;
i--;
cCondWait::SleepMs(100);
}
if (!i) {
kill(pid, SIGKILL);
ret = -1;
}
else if (ret == -1 || !WIFEXITED(status))
ret = -1;
else if (WIFEXITED(status))
ret = WEXITSTATUS(status);
pid = -1;
}
return ret;
}