hi
following is my ptrace program which is tracing
process
which is creating a file and opening it and then
writing some data to it
but constantly i am getting error that
ptrace:operation not permitted
sorry very less knowledge abt ptrace,
what's the problem
yes my filesystem which is AFS ,and this process is
attached with client side of AFS.
demo5 is just binary which is creating opening and
writing to file.
int main(void)
{
long long counter = 0; /* machine instruction
counter */
int wait_val; /* child's return
value */
int pid,pid1; /* child's
process id */
int status;
int status1;
char *a="/home/demo5";
puts("Please wait");
if((pid = fork()==0)) {
if (ptrace(PTRACE_TRACEME,
pid1, 0, 0) != 0)
/*
* parent waits for child to stop at
next
* instruction (execve)
*/
if((pid1=fork()==0)) {
if (ptrace(PTRACE_SINGLESTEP,
pid1, 0, 0) != 0)
perror("ptrace");
execvp(a,NULL);/*this is execvp in child under
child*/
exit(0);
/*
* switch to singlestep
tracing and
* release child
* if unable call error.
*/
}
}
wait(&status1);
exit(0);
}
wait(&status);
}
thanks
Prasanna
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