i was trying to make word that was detected to execute file.py.
here the source code that i try to modify at continuous.c
if (!in_speech && utt_started) {
/* speech -> silence transition, time to start new utterance */
ps_end_utt(ps);
hyp = ps_get_hyp(ps, NULL );
if (hyp = "OPEN"){
fopen("/home/pi/project/open.py", "r");
}
if (hyp != NULL) {
printf("%s\n", hyp);
fflush(stdout);
}
the program still detect the word but it still not execute the program that i want.
and here is the command that i was using
pocketsphinx_continuous -lm /home/pi/project/3379.lm -dict /home/pi/project/3379.dic -samprate 16000/8000/48000 -inmic yes -adcdev plughw:1,0
really need help here. thanks before.
In C strings are compared with strcmp, not with =, with = you just assign pointers, not even compare them.
It should be
if (strcmp(hyp, "OPEN") == 0) {
....
}
Related
I'm looking for a preferably cross-platform way to detect from within a Tcl script if the interpreter is running in a foreground or in a background process.
I've seen how to do it via ps (or /proc/$$/stat on Linux); is there a better way or do I have to hack something around that approach? I already have a utility library written in C so exposing the lowlevel API that ps also uses so I don't have to parse process output (or special file content) would be fine.
There's no truly cross-platform notion of foreground, but the main platforms do have ways of doing it according to the notion they have of foreground.
Linux, macOS, and other Unix:
For determining if a process is foreground or not, you need to check if its process group ID is the terminal's controlling process group ID. For Tcl, you'd be looking to surface the getpgrp() and tcgetpgrp() system calls (both POSIX). Tcl has no built-in exposure of either, so you're talking either a compiled extension (may I recommend Critcl for this?) or calling an external program like ps. Fortunately, if you use the latter (a reasonable option if this is just an occasional operation) you can typically condition the output so that you get just the information you want and need to do next to no parsing.
# Tested on macOS, but may work on other platforms
proc isForeground {{pid 0}} {
try {
lassign [exec ps -p [expr {$pid ? $pid : [pid]}] -o "pgid=,tpgid="] pgid tpgid
} on error {} {
return -code error "no such process"
}
# If tpgid is zero, the process is a daemon of some kind
expr {$pgid == $tpgid && $tpgid != 0}
}
Windows
There's code to do it, and the required calls are supported by the TWAPI extension so you don't need to make your own. (WARNING! I've not tested this!)
package require twapi_ui
proc isForeground {{pid 0}} {
set forground_pid [get_window_thread [get_foreground_window]]
return [expr {($pid ? $pid : [pid]) == $foreground_pid}]
}
Thanks to Donal I came up with the implementation below that should work on all POSIX Unix variants:
/*
processIsForeground
synopsis: processIsForeground
Returns true if the process is running in the foreground or false
if in the background.
*/
int IsProcessForegroundCmd(ClientData clientData UNUSED, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])
{
/* Check the arg count */
if (objc != 1) {
Tcl_WrongNumArgs(interp, 1, objv, NULL);
return TCL_ERROR;
}
int fd;
errno = 0;
if ((fd = open("/dev/tty", O_RDONLY)) != -1) {
const pid_t pgrp = getpgrp();
const pid_t tcpgrp = tcgetpgrp(fd);
if (pgrp != -1 && tcpgrp != -1) {
Tcl_SetObjResult(interp, Tcl_NewBooleanObj(pgrp == tcpgrp));
close(fd);
return TCL_OK;
}
close(fd);
}
Tcl_SetErrno(errno);
Tcl_ResetResult(interp);
Tcl_AppendResult(interp, "processIsForeground: ", (char *)Tcl_PosixError(interp), NULL);
return TCL_ERROR;
}
int Pextlib_Init(Tcl_Interp *interp)
{
if (Tcl_InitStubs(interp, "8.4", 0) == NULL)
return TCL_ERROR;
// SNIP
Tcl_CreateObjCommand(interp, "processIsForeground", IsProcessForegroundCmd, NULL, NULL);
if (Tcl_PkgProvide(interp, "Pextlib", "1.0") != TCL_OK)
return TCL_ERROR;
return TCL_OK;
}
I have looked all over and I cannot seem to figure out how to do this.
I have a parent process that has created a pipe()
Now, I want to fork() the parent and then execlp() and pass the pipe() to the new program as a command line argument.
Then from inside the new program I need to be able to read the pipefd.
I've seen a bunch of stuff on how to do it from inside the same process, but nothing on how to do it like this.
Edit: Initial post is/was rather vague.
What I have so far is:
int pfd[2];
if(pipe(pfd) == -1) {
perror("Creating pipe\n");
exit(1);
}
pid_t pid = fork();
if(pid == -1) {
fprintf (stderr, "Initiator Error Message : fork failed\n");
return -1;
}
else if(pid == 0) { // child process
close(pipe0[1]); // close(write);
execlp("program", "program", pipe0[0], NULL);
}
but then I don't really understand what I should do from inside "program" to get the FD. I tried assigning it to all sorts of things, but they all seem to error.
Thank you in advance!
The forked and execed child automatically inherit the open pipe descriptors and the pipe output is usually fed as standard input so that a command line argument to find the pipe is pretty redundant:
if(!pipe(&pipefd))
switch(fork()) {
case 0: !dup2(pipefd[0],0)&&
execlp("cat","cat","-n","/dev/fd/0",0);
case -1: return perror("fork");
default: write(pipefd[1],"OK\n",3);
}
I have a string in a uint8_t str[] array and I am trying to store the positions of characters within the str in another variable called uint8_t pos[]. The code is written in Code Composer Studio vs 5.4
I tried using sprintf(), type casting as well as changing the type of uint8_t pos[] to int pos[] as well as unsigned int pos[]. None of these work.
The code breaks at the sprintf statement and comes to a halt by reaching an undefined memory location. When I run in assembly after reaching sprintf statement, it gives an error saying that a source code for sprint.c cannot be found in location.
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include "tm4c123gh6pm.h"
#include <stdio.h>
void initHw()
{
.
.
}
int main(void)
{
// Initialize hardware
initHw();
char strRx[80];
int count =0;
int count_enter=0;
uint8_t posStr[80];
uint8_t typeStr[80];
int pos=0;
int len;
unsigned int j=0, argCount=0;
while(1)
{
if(count == 0)
{
putsUart0("Enter characters for the string\r\n");
}
if(count <= 80)
{
char c = getcUart0();
if(c=='\b')
if(count>0)
count--;
else
break;
if(c>=' ')
{
strRx[count]=c;
count++;
}
if(count==80 || c==13)//'\r')
{
count_enter++;
if(count_enter==1) //count==80 before carriage return
{
len = count;
strRx[count]='\0';
while(count!=80)
strRx[count++]='\0';
count_enter=0;
putsUart0("\r\nEntered string is:\r\n");
putsUart0(strRx);
putsUart0("\r\n");
}
j=0;
//char a[10];
for(pos=0; pos!=len; pos++)// strRx[pos]!='\0'; pos++)
{
char a[80];
if((strRx[pos]>='A' && strRx[pos]<='Z') || (strRx[pos]>='a' && strRx[pos]<='z'))
{
typeStr[j]='a';
//posStr[j]=pos;
a[j]=pos;
sprintf(a,"%u",pos); //source not found
//a[j]=pos;
//posStr[j]=sprintf("%c",a);
//posStr[j]=(uint8_t)a;//a;
while(strRx[pos]!='\0'&&((strRx[pos]>='A' && strRx[pos]<='Z') || (strRx[pos]>='a' && strRx[pos]<='z')))
{
pos++;
}
pos--;
j++;
}
else if(strRx[pos]>='0' && strRx[pos]<='9')
{
typeStr[j]='n';
a[j]=pos;
sprintf(a,"%u",pos);
//posStr[j]=pos;//a;
while(strRx[pos]!='\0'&&((strRx[pos]>='0' && strRx[pos]<='9')))
{
pos++;
}
pos--;
j++;
}
else
{
while(strRx[pos]!='\0'&&((strRx[pos]<'A' && strRx[pos]>'Z') && (strRx[pos]<'a' && strRx[pos]>'z') && (strRx[pos+1]<'0' && strRx[pos+1]>'9')))
pos++;
}
}
argCount=j;
while(j!=80)
{
typeStr[j++]='\0';
posStr[j++]='\0';
}
count = 0;
}//if(count==80 || c==13)//'\r')
}//if count<=80
}//while(1)
}//main
The "unable to locate sprintf.c" error probably just means that the debugger cannot locate the source file, which means it cannot show the source code in the debugger window. It's possible that you don't have the source code for sprintf.c and all you have is the precompiled library. Or maybe you do have the source code and the debugger is simply looking in the wrong path. If you have the source code then there may be a way to tell the debugger which path to find it.
But that is just a debugger display issue -- It is not what is causing your program to crash. The problem may be in your code but you'd have to share your code for us to identify that. Or the problem may be a couple other issues that can occur with the printf related routines.
1) printf routines can use a relatively large amount of stack space. So check for a stack overflow and increase the stack size if necessary.
2) Some embedded libraries provide multiple implementations of the printf routines such as "small", "no-float", and "full". The limited implementations use less code space but don't support all of the format specifiers. So make sure the implementation of sprintf that you've linked with supports all the format specifiers that you're actually using. Look through the project settings under linker or libraries for an option to select which version of printf is used.
I have been developing a very simple text game using Objective C and Xcode. It is almost done but I am having a problem, the scanf method stops the loop and asks for user input while I need the computer to be running the rest of the loop, the solution I came up with was running two while loops at the same time, one being the logic loop and another being a loop for user input.
I have been doing my research and it looks like using threads are the way to go, I just have not found a tutorial that will break it down for a n00b in Objective C (I am decent in java, I just have never worked with threads). If anybody could explain them or link me to a very broken down tutorial that would be great. Or if anybody has another idea I am open to anything else.
Necessary Code (The scanf I am having a problem with has asterisks on the line):
while(running != 0)
{
if(gameState == 1)
{
if(timeToGenerateNum == true)
{
while(randNumber < 10000000)
{
randNumber = arc4random() % 100000000;
}
NSLog(#"%i", randNumber);
timeToGenerateNum = false;
}
else
{
while(time <= 2500)
{
NSLog(#"Testing");
time++;
******************scanf("%i", &userNum);************************
if(userNum == randNumber)
{
score += time;
time = 0;
timeToGenerateNum = true;
}
}
NSLog(#"Game Over! Your score was %i!", score);
running = 0;
}
}
else if(gameState == 2)
{
NSLog(#"To play, simply type in the number that appears on the screen.");
NSLog(#"But be careful, you only have a short amount of time before GAME OVER!");
NSLog(#"The quicker you type in the number the more score you get!");
NSLog(#"Are you ready to start, if so type '1' and press enter!");
scanf("%i", &gameState);
}
}
You're going to have to learn a bit about BSD (Unix, Linux) input/output to pull this off: replace your call to scanf with a non-blocking function you write to acquire input from the user's keyboard.
This function should immediately return whatever the user typed, or immediately return with a zero character count if she didn't type anything.
Read up on the select(2) system call, and keep in mind that keyboard input (standard input) is the first file descriptor, file descriptor zero.
I have a C code..
i which I have following code for UNIX:
l_iRet = system( "/bin/cp -p g_acOutputLogName g_acOutPutFilePath");
when I am running the binary generated..I am getting the following error:
cp: cannot access g_acOutputLogName
Can any one help me out?
You should generally prefer the exec family of functions over the system function. The system function passes the command to the shell which means that you need to worry about command injection and accidental parameter expansion. The way to call a subprocess using exec is as follows:
pid_t child;
child = fork();
if (child == -1) {
perror("Could not fork");
exit(EXIT_FAILURE);
} else if (child == 0) {
execlp("/bin/cp", g_acOutputLogName, g_acOutPutFilePath, NULL);
perror("Could not exec");
exit(EXIT_FAILURE);
} else {
int childstatus;
if (waitpid(child, &childstatus, 0) == -1) {
perror("Wait failed");
}
if (!(WIFEXITED(childstatus) && WEXITSTATUS(childstatus) == EXIT_SUCCESS)) {
printf("Copy failed\n");
}
}
Presumably g_acOutputLogName and g_acOutPutFilePath are char[] (or char*) variables in your program, rather than the actual paths involved.
You need to use the values stored therein, rather than the variable names, for example:
char command[512];
snprintf( command, sizeof command, "/bin/cp -p %s %s",
g_acOutputLogName, g_acOutPutFilePath );
l_iRet = system( command );