[SOLVED] open() syscall breaks execve()'s work

[Schmidt]

here is my working code :

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>

int main(int argc, char** argv)
{
  int fd;
  char *envp[] = { "DOCROOT=.", "HOME=/home/schmidt", "INVOKER=CGILauncher-0.01" };
  char *newargv[] = { NULL };    

execve(argv[1], newarg, envp);
//  int code = execle(argv[1], NULL, envp);  /* execle works similar */
  perror("execle() error");
  printf("Int code: %d, errno is %d\n", code, errno);
	
  return 0;
}

Threre are no problems with it. But if I insert open() syscall in my code before execve(), like this

int fd;
char *buf = "This is a test\n\0";

      //create & write some data to a file
  umask(011);
  fd = open("out.tmp", O_CREAT, S_IRWXU | S_IRWXG | S_IRWXO);
  if(fd < 0)
    {
      perror("open() error");
      return -1;
    }
  close(fd);

  fd = open("out.tmp", O_RDWR);
  printf("fd is %d\n", fd);
  if(fd < 0)
    {
      perror("open() error");
      return -1;
    }
  ssize_t bytes = write(fd, (void*) buf , strlen(buf));
  if(bytes < 0)
    {
      perror("write() error");
      return -1;
    }
  close(fd);

it breaks execve() with "Bad address" error. I need open() syscall because I want to redirect STDOUT to a file before starting execve(), but any manipulations with open()/dup2() also do not work because of open(). Can you give me any ideas what it could be?...

[lemons]

You've written execle() in the top code, and it's not even in the bottom code. Not execve()?

[Schmidt]

Oh, I corrected the code it doesn't matter, I tested it with execle and execve - they both fails after any open() call. Anyway, as written in manual "...execle, execlp are just front-ends for the execve..."

[Schmidt]

I found where is my fault )

from execve manual:

... The last elements of passed arrays must be NULL pointers.

thus, this was usual segfault )