I need upload my own program on esp8266 and i tried to upload a program for test and i see esp reset maybe evry 200 ms and i am receivig a lot of data on usart but isn't my data in program .data is something like exception and some bytes about stack and some data about load and reset again
this is my test code
#include <ESP8266WiFi.h>
#define MAX_SRV_CLIENTS 1
#define TCP_PORT (23)
WiFiServer tcpServer(TCP_PORT);
WiFiClient tcpServerClients[MAX_SRV_CLIENTS];
IPAddress apIP(192, 168, 1, 1);
const char SSID[] = "TCPUARTBridge";
const char PASSWORD[] = "12345678";
#define SerialDebug Serial1
#define SerialGPS Serial
#ifndef min
#define min(x,y) ((x)<(y)?(x):(y))
#endif
void setup() {
SerialDebug.begin(115200);
SerialDebug.println("TCP <-> UART bridge");
WiFi.mode(WIFI_AP);
WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0));
WiFi.softAP(SSID, PASSWORD);
SerialGPS.begin(9600);
tcpServer.begin();
tcpServer.setNoDelay(true);
SerialDebug.print("Ready! Use 'telnet or nc ");
SerialDebug.print(WiFi.localIP());
SerialDebug.print(' ');
SerialDebug.print(TCP_PORT);
SerialDebug.println("' to connect");
}
void loop() {
uint8_t i;
char buf[1024];
int bytesAvail, bytesIn;
if (tcpServer.hasClient()) {
for (i = 0; i < MAX_SRV_CLIENTS; i++) {
if (!tcpServerClients[i] || !tcpServerClients[i].connected()) {
if (tcpServerClients[i])
tcpServerClients[i].stop();
tcpServerClients[i] = tcpServer.available();
SerialDebug.print("New client: "); SerialDebug.print(i);
continue;
}
}
WiFiClient tcpServerClient = tcpServer.available();
tcpServerClient.stop();
}
for (i = 0; i < MAX_SRV_CLIENTS; i++) {
if (tcpServerClients[i] && tcpServerClients[i].connected()) {
while ((bytesAvail = tcpServerClients[i].available()) > 0) {
bytesIn = tcpServerClients[i].readBytes(buf, min(sizeof(buf), bytesAvail));
if (bytesIn > 0) {
SerialGPS.write(buf, bytesIn);
delay(0);
}
}
}
}
while ((bytesAvail = SerialGPS.available()) > 0) {
bytesIn = SerialGPS.readBytes(buf, min(sizeof(buf), bytesAvail));
if (bytesIn > 0) {
for (i = 0; i < MAX_SRV_CLIENTS; i++) {
if (tcpServerClients[i] && tcpServerClients[i].connected()) {
tcpServerClients[i].write((uint8_t*)buf, bytesIn);
delay(0);
}
}
}
}
}
Thank you for reading this
Related
I've writen this code but it doesn't work correctly.
This is menu interface:
*************ENCODE_DECODE_BASE64**************
******* 1. Encode ********
******* 2. Decode ********
******* 3. Exit ********
***********************************************
When i choose 1, "Encode". The function runs but the process exits.
I want when I choose 1, the function to run and then after that, the menu to display again.
Can you help me?
Here is Clientcode:
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <stdlib.h>
#define MAX 1024
// read filename
char *inputString(int size){
int test=0;
char *s=(char*)malloc(size);
do{
if(test!=0){
printf("File not found !!!!!!");
}
fgets(s,size,stdin);
test++;
}while(strlen(s)<=1);
return strtok(s,"\n");
}
int main(int argc, char *argv[]){
int sockfd;
struct sockaddr serverAddr; //server address
char buff[1024];
struct sockaddr_in inAddr;
long int sentBytes,revedBytes;
sockfd=socket(AF_INET,SOCK_STREAM,0); // create socket
if (sockfd == -1)
{
printf("ERROR opening socket\n");
return 1;
}
printf("Socket done\n");
inAddr.sin_family=AF_INET; //default
inAddr.sin_port=htons(5500); // service port
inet_aton("127.0.0.1",&inAddr.sin_addr);
//connectting
if(connect(sockfd,(struct sockaddr *)&inAddr,sizeof(struct sockaddr))<0){
printf("Connect failed.\n");
return 1;
}
printf("Connection accepted\n");
char *FileName; // file input
char *Result; // file return
int choice;
do{
printf("\n*************ENCODE_DECODE_BASE64**************");
printf("\n******* 1. Encode ********");
printf("\n******* 2. Decode ********");
printf("\n******* 3. Exit ********");
printf("\n***********************************************\n");
printf("Choice: ");
choice = getchar();
while(getchar() !='\n');
switch(choice)
{
case '1':
//demo encode////////////////////////////////////////
send(sockfd,"encode",5,0); // send to server when choose 1
printf("File Encode : ");
FileName = inputString(20);
FILE *fpt = fopen(FileName,"r");
if(fpt==NULL){
printf("File not found");
return -1;
}
printf("File Result: ");
Result = inputString(20);
FILE *ft = fopen(Result,"w");
while(!feof(fpt)){
if (fgets(buff,MAX,fpt) != NULL ){
sentBytes=send(sockfd,buff,1024,0);
revedBytes=recv(sockfd,buff,1024,0);
fprintf(ft,"%s\n",buff);
}
}
printf("Encode done!thanks you !\n");
//close(sockfd);
fclose(fpt);fclose(ft);
return 0;
break;
//decode ///////////////////////////////////////////////
case '2':
send(sockfd,"decode",6,0);
printf("File Decode : ");
FileName = inputString(20);
FILE *fpt1 = fopen(FileName,"r");
if(fpt1==NULL){
printf("File not found");
return -1;
}
printf("File Result : ");
Result = inputString(20);
FILE *ft1 = fopen(Result,"w");
while(!feof(fpt1)){
if (fgets(buff,MAX,fpt1) != NULL ){
sentBytes=send(sockfd,buff,1024,0);
revedBytes=recv(sockfd,buff,1024,0);
fprintf(ft1,"%s",buff);
}
}
printf("Decode done ! thanks you !\n");
//close(sockfd);
fclose(fpt1);fclose(ft1);
return 0;
break;
///////////////////////////////////////////////////////
case '3':
printf("Thanks!\n");
break;
default: printf("wrong number, please try again!\n"); break;
//end choice///////////////////////////////////////
}
}while(choice!='3');
//end menu
//close(sockfd);
//return 0;
}
and here is ServerCode:
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
char b64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/* decodeblock - decode 4 '6-bit' characters into 3 8-bit binary bytes */
void decodeblock(unsigned char in[], char *clrstr) {
unsigned char out[4];
out[0] = in[0] << 2 | in[1] >> 4;
out[1] = in[1] << 4 | in[2] >> 2;
out[2] = in[2] << 6 | in[3] >> 0;
out[3] = '\0';
strncat(clrstr, out, sizeof(out));
}
void b64_decode(char *b64src, char *clrdst) {
int c, phase, i;
unsigned char in[4];
char *p;
clrdst[0] = '\0';
phase = 0; i=0;
while(b64src[i]) {
c = (int) b64src[i];
if(c == '=') {
decodeblock(in, clrdst);
break;
}
p = strchr(b64, c);
if(p) {
in[phase] = p - b64;
phase = (phase + 1) % 4;
if(phase == 0) {
decodeblock(in, clrdst);
in[0]=in[1]=in[2]=in[3]=0;
}
}
i++;
}
}
/* encodeblock - encode 3 8-bit binary bytes as 4 '6-bit' characters */
void encodeblock( unsigned char in[], char b64str[], int len ) {
unsigned char out[5];
out[0] = b64[ in[0] >> 2 ];
out[1] = b64[ ((in[0] & 0x03) << 4) | ((in[1] & 0xf0) >> 4) ];
out[2] = (unsigned char) (len > 1 ? b64[ ((in[1] & 0x0f) << 2) |
((in[2] & 0xc0) >> 6) ] : '=');
out[3] = (unsigned char) (len > 2 ? b64[ in[2] & 0x3f ] : '=');
out[4] = '\0';
strncat(b64str, out, sizeof(out));
}
/* encode - base64 encode a stream, adding padding if needed */
void b64_encode(char *clrstr, char *b64dst) {
unsigned char in[3];
int i, len = 0;
int j = 0;
b64dst[0] = '\0';
while(clrstr[j]) {
len = 0;
for(i=0; i<3; i++) {
in[i] = (unsigned char) clrstr[j];
if(clrstr[j]) {
len++; j++;
}
else in[i] = 0;
}
if( len ) {
encodeblock( in, b64dst, len );
}
}
}
void sig_chld(int signo) //child
{
pid_t pid;
int stat;
while((pid = waitpid(-1, &stat, WNOHANG))>0)
printf("child %d terminated\n", pid);
return;
}
int main()
{
int listen_sock, conn_sock;
int server_len, client_len,choice;
struct sockaddr_in server_address;
struct sockaddr_in client_address;
char myb64[1024] = ""; //encode
char mydst[1024] = ""; //decode
int sentBytes,revedBytes,bytes_readi;
char buff[1024]; //buffer to send data
listen_sock = socket(AF_INET, SOCK_STREAM, 0); //create socket
if (listen_sock == -1)
{
printf("ERROR opening socket\n");
return 0;
}
printf("Socket done\n");
//Thiet lap dia chi server
server_address.sin_family = AF_INET; //default
inet_aton("127.0.0.1",&server_address.sin_addr); //ip server
server_address.sin_port = htons(5500); // port server
server_len = sizeof(server_address);
if(bind(listen_sock, (struct sockaddr *)&server_address,server_len)<0)
{
printf("ERROR on binding\n");
return 0;
}
printf("Bind done\n");
int check = listen(listen_sock,10);
if (check == -1)
{
printf("Error connect");
return 0;
}
printf("Waiting connect..\n");
while(1) {
client_len = sizeof(client_address);
conn_sock = accept(listen_sock,(struct sockaddr *)&client_address, &client_len);
if(conn_sock==-1){
printf("Error connect\n");
return 1;
}else{
printf("Accept new connection\n");
}
if(fork() == 0){
close(listen_sock);
do{
revedBytes = recv(conn_sock,buff,1024,0);
buff[revedBytes]='\0';
if(strcmp(buff,"mahoa")==0) choice=1;
else if(strcmp(buff,"giaima")==0) choice=2; else choice = 3;
switch(choice)
{
case 1:
while((revedBytes = recv(conn_sock,buff,1024,0)) > 0){
buff[revedBytes]='\0';
//printf("string send by client encode : %s\n",buff);
b64_encode(buff, myb64); //ma hoa
sentBytes=send(conn_sock,myb64,1024,0); //gui lai string da ma hoa cho client
}
close(conn_sock);//Dong ket noi cua client
exit(0);
break;
case 2:
while((revedBytes = recv(conn_sock,buff,1024,0)) > 0){
buff[revedBytes]='\0';
//printf("string send by client decode: %s\n",buff);
b64_decode(buff,mydst); // giaima
sentBytes=send(conn_sock,mydst,1024,0);
}
close(conn_sock);
exit(0);
break;
case 3:break;
}
}while(choice!=3);
break;
}
signal(SIGCHLD,sig_chld);
close(conn_sock);
}
return 1;
}
i installed the usb webcam driver in linux 2.6 version
then i want to capture using V4L please any one reply me how can i write the program to capture using webcam
I work with V4l using the reference of the linuxTV (http://linuxtv.org/downloads/v4l-dvb-apis/). They have the documentation about V4l and some examples. Take a look at the following example (i got from the linuxTV):
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/mman.h>
#include <linux/videodev2.h>
#include "../libv4l/include/libv4l2.h"
#define CLEAR(x) memset(&(x), 0, sizeof(x))
struct buffer {
void *start;
size_t length;
};
static void xioctl(int fh, int request, void *arg)
{
int r;
do {
r = v4l2_ioctl(fh, request, arg);
} while (r == -1 && ((errno == EINTR) || (errno == EAGAIN)));
if (r == -1) {
fprintf(stderr, "error %d, %s\n", errno, strerror(errno));
exit(EXIT_FAILURE);
}
}
int main(int argc, char **argv)
{
struct v4l2_format fmt;
struct v4l2_buffer buf;
struct v4l2_requestbuffers req;
enum v4l2_buf_type type;
fd_set fds;
struct timeval tv;
int r, fd = -1;
unsigned int i, n_buffers;
char *dev_name = "/dev/video0";
char out_name[256];
FILE *fout;
struct buffer *buffers;
fd = v4l2_open(dev_name, O_RDWR | O_NONBLOCK, 0);
if (fd < 0) {
perror("Cannot open device");
exit(EXIT_FAILURE);
}
CLEAR(fmt);
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fmt.fmt.pix.width = 640;
fmt.fmt.pix.height = 480;
fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB24;
fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
xioctl(fd, VIDIOC_S_FMT, &fmt);
if (fmt.fmt.pix.pixelformat != V4L2_PIX_FMT_RGB24) {
printf("Libv4l didn't accept RGB24 format. Can't proceed.\n");
exit(EXIT_FAILURE);
}
if ((fmt.fmt.pix.width != 640) || (fmt.fmt.pix.height != 480))
printf("Warning: driver is sending image at %dx%d\n",
fmt.fmt.pix.width, fmt.fmt.pix.height);
CLEAR(req);
req.count = 2;
req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
req.memory = V4L2_MEMORY_MMAP;
xioctl(fd, VIDIOC_REQBUFS, &req);
buffers = calloc(req.count, sizeof(*buffers));
for (n_buffers = 0; n_buffers < req.count; ++n_buffers) {
CLEAR(buf);
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = n_buffers;
xioctl(fd, VIDIOC_QUERYBUF, &buf);
buffers[n_buffers].length = buf.length;
buffers[n_buffers].start = v4l2_mmap(NULL, buf.length,
PROT_READ | PROT_WRITE, MAP_SHARED,
fd, buf.m.offset);
if (MAP_FAILED == buffers[n_buffers].start) {
perror("mmap");
exit(EXIT_FAILURE);
}
}
for (i = 0; i < n_buffers; ++i) {
CLEAR(buf);
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = i;
xioctl(fd, VIDIOC_QBUF, &buf);
}
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
xioctl(fd, VIDIOC_STREAMON, &type);
for (i = 0; i < 20; i++) {
do {
FD_ZERO(&fds);
FD_SET(fd, &fds);
/* Timeout. */
tv.tv_sec = 2;
tv.tv_usec = 0;
r = select(fd + 1, &fds, NULL, NULL, &tv);
} while ((r == -1 && (errno = EINTR)));
if (r == -1) {
perror("select");
return errno;
}
CLEAR(buf);
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
xioctl(fd, VIDIOC_DQBUF, &buf);
sprintf(out_name, "out%03d.ppm", i);
fout = fopen(out_name, "w");
if (!fout) {
perror("Cannot open image");
exit(EXIT_FAILURE);
}
fprintf(fout, "P6\n%d %d 255\n",
fmt.fmt.pix.width, fmt.fmt.pix.height);
fwrite(buffers[buf.index].start, buf.bytesused, 1, fout);
fclose(fout);
xioctl(fd, VIDIOC_QBUF, &buf);
}
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
xioctl(fd, VIDIOC_STREAMOFF, &type);
for (i = 0; i < n_buffers; ++i)
v4l2_munmap(buffers[i].start, buffers[i].length);
v4l2_close(fd);
return 0;
}
I want to stream JPEG images or motion-JPEG file through live 555. But the problem is that in live 555 implementation for Jpegs is not available. Anyone can help ??
You can find a implementation that was posted to the devel mailing list http://lists.live555.com/pipermail/live-devel/2012-February/014672.html.
The code and a sample is available but this modification was rejected by live555 maintainer.
First we need to implement an MJPEGVideoSource than can feed a JPEGVideoRTPSink.
#include "JPEGVideoSource.hh"
class MJPEGVideoSource : public JPEGVideoSource
{
public:
static MJPEGVideoSource* createNew (UsageEnvironment& env, FramedSource* source)
{
return new MJPEGVideoSource(env,source);
}
virtual void doGetNextFrame()
{
if (m_inputSource)
m_inputSource->getNextFrame(fTo, fMaxSize, afterGettingFrameSub, this, FramedSource::handleClosure, this);
}
virtual void doStopGettingFrames()
{
FramedSource::doStopGettingFrames();
if (m_inputSource)
m_inputSource->stopGettingFrames();
}
static void afterGettingFrameSub(void* clientData, unsigned frameSize,unsigned numTruncatedBytes,struct timeval presentationTime,unsigned durationInMicroseconds)
{
MJPEGVideoSource* source = (MJPEGVideoSource*)clientData;
source->afterGettingFrame(frameSize, numTruncatedBytes, presentationTime, durationInMicroseconds);
}
void afterGettingFrame(unsigned frameSize,unsigned numTruncatedBytes,struct timeval presentationTime,unsigned durationInMicroseconds)
{
int headerSize = 0;
bool headerOk = false;
fFrameSize = 0;
for (unsigned int i = 0; i < frameSize ; ++i)
{
// SOF
if ( (i+8) < frameSize && fTo[i] == 0xFF && fTo[i+1] == 0xC0 )
{
m_height = (fTo[i+5]<<5)|(fTo[i+6]>>3);
m_width = (fTo[i+7]<<5)|(fTo[i+8]>>3);
}
// DQT
if ( (i+5+64) < frameSize && fTo[i] == 0xFF && fTo[i+1] == 0xDB)
{
if (fTo[i+4] ==0)
{
memcpy(m_qTable, fTo + i + 5, 64);
m_qTable0Init = true;
}
else if (fTo[i+4] ==1)
{
memcpy(m_qTable + 64, fTo + i + 5, 64);
m_qTable1Init = true;
}
}
// End of header
if ( (i+1) < frameSize && fTo[i] == 0x3F && fTo[i+1] == 0x00 )
{
headerOk = true;
headerSize = i+2;
break;
}
}
if (headerOk)
{
fFrameSize = frameSize - headerSize;
memmove( fTo, fTo + headerSize, fFrameSize );
}
fNumTruncatedBytes = numTruncatedBytes;
fPresentationTime = presentationTime;
fDurationInMicroseconds = durationInMicroseconds;
afterGetting(this);
}
virtual u_int8_t type() { return 1; };
virtual u_int8_t qFactor() { return 128; };
virtual u_int8_t width() { return m_width; };
virtual u_int8_t height() { return m_height; };
u_int8_t const* quantizationTables( u_int8_t& precision, u_int16_t& length )
{
length = 0;
precision = 0;
if ( m_qTable0Init && m_qTable1Init )
{
precision = 8;
length = sizeof(m_qTable);
}
return m_qTable;
}
protected:
MJPEGVideoSource(UsageEnvironment& env, FramedSource* source) : JPEGVideoSource(env),
m_inputSource(source),
m_width(0),
m_height(0),
m_qTable0Init(false),
m_qTable1Init(false)
{
memset(&m_qTable,0,sizeof(m_qTable));
}
virtual ~MJPEGVideoSource()
{
Medium::close(m_inputSource);
}
protected:
FramedSource* m_inputSource;
u_int8_t m_width;
u_int8_t m_height;
u_int8_t m_qTable[128];
bool m_qTable0Init;
bool m_qTable1Init;
};
Next we can use it as a video source in order to build a simple RTSP server:
#include "liveMedia.hh"
#include "BasicUsageEnvironment.hh"
#include "GroupsockHelper.hh"
#include "MJPEGVideoSource.hh"
char const* inputFileName = "test.mjpeg";
int main(int argc, char** argv) {
// Begin by setting up our usage environment:
TaskScheduler* scheduler = BasicTaskScheduler::createNew();
UsageEnvironment* env = BasicUsageEnvironment::createNew(*scheduler);
// Create 'groupsocks' for RTP and RTCP:
struct in_addr destinationAddress;
destinationAddress.s_addr = chooseRandomIPv4SSMAddress(*env);
const unsigned short rtpPortNum = 18888;
const unsigned short rtcpPortNum = rtpPortNum+1;
const unsigned char ttl = 255;
const Port rtpPort(rtpPortNum);
const Port rtcpPort(rtcpPortNum);
Groupsock rtpGroupsock(*env, destinationAddress, rtpPort, ttl);
rtpGroupsock.multicastSendOnly(); // we're a SSM source
Groupsock rtcpGroupsock(*env, destinationAddress, rtcpPort, ttl);
rtcpGroupsock.multicastSendOnly(); // we're a SSM source
// Create a 'JPEG Video RTP' sink from the RTP 'groupsock':
RTPSink* videoSink = JPEGVideoRTPSink::createNew(*env, &rtpGroupsock);
// Create (and start) a 'RTCP instance' for this RTP sink:
const unsigned estimatedSessionBandwidth = 5000; // in kbps; for RTCP b/w share
const unsigned maxCNAMElen = 100;
unsigned char CNAME[maxCNAMElen+1];
gethostname((char*)CNAME, maxCNAMElen);
CNAME[maxCNAMElen] = '\0'; // just in case
RTCPInstance* rtcp = RTCPInstance::createNew(*env, &rtcpGroupsock,
estimatedSessionBandwidth, CNAME,
videoSink, NULL /* we're a server */,
True /* we're a SSM source */);
// Note: This starts RTCP running automatically
RTSPServer* rtspServer = RTSPServer::createNew(*env, 8554);
if (rtspServer == NULL) {
*env << "Failed to create RTSP server: " << env->getResultMsg() << "\n";
exit(1);
}
ServerMediaSession* sms = ServerMediaSession::createNew(*env, "testStream", inputFileName,"Session streamed by \"testMJPEGVideoStreamer\"",
True /*SSM*/);
sms->addSubsession(PassiveServerMediaSubsession::createNew(*videoSink, rtcp));
rtspServer->addServerMediaSession(sms);
char* url = rtspServer->rtspURL(sms);
*env << "Play this stream using the URL \"" << url << "\"\n";
delete[] url;
// Start the streaming:
*env << "Beginning streaming...\n";
// Open the input file as a 'byte-stream file source':
ByteStreamFileSource* fileSource = ByteStreamFileSource::createNew(*env, inputFileName);
if (fileSource == NULL) {
*env << "Unable to open file \"" << inputFileName
<< "\" as a byte-stream file source\n";
exit(1);
}
// Create the MJPEG video source:
MJPEGVideoSource* videoSource = MJPEGVideoSource::createNew(*env, fileSource);
// Finally, start playing:
*env << "Beginning to read from file...\n";
videoSink->startPlaying(*videoSource, NULL, NULL);
env->taskScheduler().doEventLoop();
return 0;
}
Hope you have done it but if not-
see this Jpeg Streaming using live555
This is doing the same thing as you have asked to stream the images/Jpegs.
For MJpegs you'll have to do the same process.
I have list of background processes and their pid running in background in iphone got from following code. My projects requirement is-
(its like an antivirus)
Get information on each process
a. Name
b. Size
c. Last Modified Date/Time
d. Associated Files
e. What the process is accessing from all interfaces (storage, USB, Bluetooth, Wi-Fi etc)
f. Any other information available
Thanks in advance.
#import <mach/mach_host.h>
#include "stdlib.h"
#include "stdio.h"
#include "string.h"
#include "sys/sysctl.h"
#include <CoreFoundation/CoreFoundation.h>
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
- (void)viewDidLoad
{
[super viewDidLoad];
[self printProcessInfo];
}
-(int) printProcessInfo
{
int mib[5];
struct kinfo_proc *procs = NULL, *newprocs;
int i, st, nprocs;
size_t miblen, size;
/* Set up sysctl MIB */
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_ALL;
mib[3] = 0;
miblen = 4;
/* Get initial sizing */
st = sysctl(mib, miblen, NULL, &size, NULL, 0);
/* Repeat until we get them all ... */
do {
/* Room to grow */
size += size / 10;
newprocs = realloc(procs, size);
if (!newprocs) {
if (procs) {
free(procs);
}
perror("Error: realloc failed.");
return (0);
}
procs = newprocs;
st = sysctl(mib, miblen, procs, &size, NULL, 0);
} while (st == -1 && errno == ENOMEM);
if (st != 0) {
perror("Error: sysctl(KERN_PROC) failed.");
return (0);
}
/* Do we match the kernel? */
assert(size % sizeof(struct kinfo_proc) == 0);
nprocs = size / sizeof(struct kinfo_proc);
if (!nprocs) {
perror("Error: printProcessInfo.");
return(0);
}
printf(" PID\tName\n");
printf("-----\t--------------\n");
self.lists = [[NSMutableString alloc] init];
for (i = nprocs-1; i >=0; i--) {
printf("%5d\t%s\n",(int)procs[i].kp_proc.p_pid, procs[i].kp_proc.p_comm);
}
NSLog(#"%#",lists);
listsText.text = lists;
free(procs);
return (0);
}
answer a)name of process you are getting in above code.
answer d)to get associated files,pass pid of process to this function (we have got pid in questions code)-
void print_argv_of_pid(int pid) {
printf("%d\n", pid);
int mib[3], argmax, nargs, c = 0;
size_t size;
char *procargs, *sp, *np, *cp;
extern int eflg;
int show_args = 1;
mib[0] = CTL_KERN;
mib[1] = KERN_ARGMAX;
size = sizeof(argmax);
if (sysctl(mib, 2, &argmax, &size, NULL, 0) == -1) {
goto ERROR_A;
}
/* Allocate space for the arguments. */
procargs = (char *)malloc(argmax);
if (procargs == NULL) {
goto ERROR_A;
}
mib[0] = CTL_KERN;
mib[1] = KERN_PROCARGS2;
mib[2] = pid;
size = (size_t)argmax;
if (sysctl(mib, 3, procargs, &size, NULL, 0) == -1) {
goto ERROR_B;
}
memcpy(&nargs, procargs, sizeof(nargs));
cp = procargs + sizeof(nargs);
/* Skip the saved exec_path. */
for (; cp < &procargs[size]; cp++) {
if (*cp == '\0') {
/* End of exec_path reached. */
break;
}
}
if (cp == &procargs[size]) {
goto ERROR_B;
}
/* Skip trailing '\0' characters. */
for (; cp < &procargs[size]; cp++) {
if (*cp != '\0') {
/* Beginning of first argument reached. */
break;
}
}
if (cp == &procargs[size]) {
goto ERROR_B;
}
/* Save where the argv[0] string starts. */
sp = cp;
for (np = NULL; c < nargs && cp < &procargs[size]; cp++) {
if (*cp == '\0') {
c++;
if (np != NULL) {
/* Convert previous '\0'. */
*np = ' ';
} else {
/* *argv0len = cp - sp; */
}
/* Note location of current '\0'. */
np = cp;
if (!show_args) {
/*
* Don't convert '\0' characters to ' '.
* However, we needed to know that the
* command name was terminated, which we
* now know.
*/
break;
}
}
}
if (np == NULL || np == sp) {
/* Empty or unterminated string. */
goto ERROR_B;
}
/* Make a copy of the string. */
printf("%s\n", sp);
/* Clean up. */
free(procargs);
return;
ERROR_B:
free(procargs);
ERROR_A:
printf("error");
}
answer b),c)-size and access times-
struct stat st;
//pass filepath upto /.app/ to stat function (use 'componentsseparatedby' of nsstring apply on full path which we got in answer d's code above)
if (stat(filename, &st)) {
perror(filename);
} else {
printf("%s: mtime = %lld.%.9ld\n", filename, (long long)st.st_mtimespec.tv_sec, st.st_mtimespec.tv_nsec);
printf("File size: %lld bytes\n",
(long long) st.st_size);
printf("Last status change: %s", ctime(&st.st_ctime));
printf("Last file access: %s", ctime(&st.st_atime));
printf("Last file modification: %s", ctime(&st.st_mtime));
}
other information-
TO KILL THE PROCESS-
just pass pid of process to be killed-
int pid_exists(long pid)
{
int kill_ret;
// save some time if it's an invalid PID
if (pid < 0) {
return 0;
}
// if kill returns success of permission denied we know it's a valid PID
kill_ret = kill(pid , 0);
if ( (0 == kill_ret) || (EPERM == errno) ) {
return 1;
}
// otherwise return 0 for PID not found
return 0;
}
I have a python server that is trying to send a binary file to a client on iOS but 90% of the time the file is incomplete. The receive call on the client fails after receiving about 80% of the file.
This is basically how it's setup.
Server
class ForkingTCPRequestHandler(SocketServer.BaseRequestHandler):
def handle(self):
f = open(TEST_FILE_NAME, 'rb')
file_data = f.read()
self.request.sendall(file_data)
f.close()
class ForkingTCPServer(SocketServer.ForkingMixIn, SocketServer.TCPServer):
pass
if __name__ == '__main__':
try:
server = ForkingTCPServer(('0.0.0.0', 9000), ForkingTCPRequestHandler)
except socket.error as e:
sys.exit(1)
try:
server.serve_forever()
except KeyboardInterrupt:
server.shutdown()
sys.exit(0)
This code works outside of our iOS project (entire file is received)
int receiveFile() {
/* ... */
/* Receive file */
tempBuf = (char*) malloc(sizeof(char)*fileLen);
totalRecv = 0;
recvBytes = 0;
while (totalRecv < fileLen) {
recvBytes = recv(s, tempBuf+totalRecv, 1<<14, 0);
if (recvBytes < 0) {
free(tempBuf);
close(s);
return -1;
}
totalRecv += recvBytes;
}
close(s);
return 0;
}
int connectToServerWithHostname(char *hostname, char *port) {
/* ... */
memset(&targetAddr, 0, sizeof(targetAddr));
targetAddr.sin_family = AF_INET;
targetAddr.sin_port = htons(atoi(port));
bcopy(hostdetails->h_addr, (char *)&targetAddr.sin_addr, hostdetails->h_length);
sock = socket(AF_INET, SOCK_STREAM, 0);
if (socket < 0) {
return -1;
}
rc = connect(sock, (struct sockaddr *)&targetAddr, sizeof(targetAddr));
if (rc < 0) {
close(sock);
return -1;
}
return sock;
}
int main(int argc, char **argv) {
assert(!receiveFile());
return 0;
}
But this equivalent code inside our iOS project fails (partial receive). Even though I'm connecting and receiving the same way as the code above.
while (totalRecv < ntohl(symProcPacket.totalDataLen)) {
recvBytes = recv(s, tempBuf+totalRecv, DEFAULT_SENDRECVSIZE, DEFAULT_SENDRECV_FLAGS);
if (recvBytes < 0) {
debug("Error, could not receive file\n");
free(tempBuf);
errorType = kSymClientErrorReceiving;
goto errorImporting;
}
totalRecv += recvBytes;
printf("Received: %d/%d\n", totalRecv, ntohl(symProcPacket.totalDataLen));
}
Any ideas on why this is failing?
Are sockets different in an iOS project or something?