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I am actually calling sleep with 1 second in a loop, instead of 60 seconds to check if the command has already completed its execution.

I have a running service which runs in background.
It execute shell commands by function system(cmd)
I need to report fail when command execution takes more than 60 seconds.
Parent doesn't need to...

Go for multi-line statement

Function call setsid() doesn't work if the calling process has a control terminal. This is usually done in background daemon processes. After calling setsid, the process becomes the process group...

A sample.c file is written with only one single statement.
main;
Segmentation fault occurred when executed that file.

Any statement other than main; is written, for example unix; then it won't...

std::ofstream.is_open()

sed 0,/white/{s/white/black/} filename

MCC_T_SYS_ADDRINFO *iter = ipc->addr_ptr;
MCC_T_SYS_ADDRINFO *newloc;

copy( &iter, &newloc);

copy(MCC_T_SYS_ADDRINFO **src, MCC_T_SYS_ADDRINFO **dst)
{
while( *src != NULL )
{
//1....

echo "/a/bc_de/fe_rt/ghl/CW_CA_CA_20140128_150752.xml" | cut -d / -d _ -f 6,7 | cut -d . -f 1

Modifying the myfunc function changing data->type inplace of s->type


void myfunc(S *data)
{
switch(data->type) {
case TYPE_DS:
data->ds.dc=0;
...

The "record - locking" concept ensures, one copy of process is running. If each daemon creates a file and places a write lock on the entire file, only one such write lock will be allowed to be...

void deleteLastNode(struct list *itr)
{
struct list *tmp;
if( itr )
{
while( itr->next != NULL )
{
tmp = itr;
itr = itr->next;
}
free(itr);
...

You may use a struct, for grouping the bolean variable and integer varaible.
Suppose,

struct strct_value_bool{
int x;
bool bl;
};
std::map<String str, strct_value_bool> myMap;

Why, here the size of class 'Derived' is 8 ?

class Base1
{
public:
virtual void f() { }
};
class Base2
{
public:
virtual void f() { }
};
class Derived : public Base1, Base2
{
...

How to replace a word in text file using c++ fstream. Is there a way, without creating any temporary file. Could you please share pseudo code ???

How to initialize an object of class say "A", with an object of type say "B".
The following code give the error message "error: conversion from âAâ to non-scalar type âBâ requested"

#include...

To get rid of dangling pointers, after freeing the pointer, can we assign NULL. Is this be an acceptable solution. Since free(NULL) won't do any operation.


main(){
void *ptr = malloc(10);
...

"more" contains less and "less" contains more ... Funny to know.

Finally .. I think i got answer !!! its may be because of virtual pointer in the derived class.

I have the two class definition as follows.


class A { public: int a; };

class B : virtual public A{ };



The size of class A is shown as 4, and size of class B is shown as 16. Why is...

There is base class B, and two derived classes D1 and D2 derived from Base. Base class B, have two data members ( public or protected or private or if any). D1 should inherit both these data members,...

Try the command with following option.

ipcs -a


It supposed to show the output like following. Where perms is the numerical representation of modes.
777 is equivalent to RWXRWXRWX and
461 is...

Perhaps this kind of model serves your purpose.
Every time fork a child process, where it loads the executable with index as argument.
Parent process continues looping on index value.

for(index...

A successful exec call replaces the current program with another program. We can't get back to the previous executable. If you want keep both processes, you may use vfork() and then exec().

As per your code, main thread send only one int value to the "funktion1" thread.
After sending one int value, the main thread is modifying its value ten times.

If you want to send all 10 int...