I am trying to spawn a new process using execve()
from unistd.h
on Linux. I have tried passing it the following parameters execve("/bin/ls", "/bin/ls", NULL);
but get no result. I do not get an error either, the program just exits. Is there a reason why this is happening? I have tried launching it as root and regular user. The reason I need to use execve()
is because I am trying to get it to work in an assembly call like so
program: db "/bin/ls",0
mov eax, 0xb
mov ebx, program
mov ecx, program
mov edx, 0
int 0x80
Thank you!
The arguments that you're passing to execve
are wrong. Both the second and third must be an array of char pointers with a NULL sentinel value, not a single pointer.
In other words, something like:
#include <unistd.h>
int main (void) {
char * const argv[] = {"/bin/ls", NULL};
char * const envp[] = {NULL};
int rc = execve ("/bin/ls", argv, envp);
return rc;
}
When I run that, I do indeed get a list of the files in the current directory.