fork（）函数的问题，在虚拟机上好用，手机上不好用！
在虚拟机上，程序执行成功，WEXITSTATUS（status）返回0；在手机上（Linux环境）WEXITSTATUS（status）返回1，cp操作失败。谁知道为什么？一样的代码。

BOOL CopyFile(CHAR* sourcePath, CHAR* destPath)
{
char prog[20] = "/bin/cp ";
char *arg[10];
int i = 0;
int pid;
int res;

MTP_DBG( "prepare to move file from %s to %s\n. ",sourcePath, destPath);

if ( NULL == sourcePath )
return FALSE;
if ( NULL == destPath )
return FALSE;

pid = fork();

if (pid == 0)
{ /* child */
arg[i++] = prog;
arg[i++] = "-f ";
arg[i++] = sourcePath;
arg[i++] = destPath;

execv(prog,arg);
exit(1); /* exec failed */
}
else if (pid != -1)
{
/* parent */
int status;

// wait(&status);
MTP_DBG( "Parent process: before waiting child.\n ") ;
waitpid(pid,&status,0);
res = (WIFEXITED(status)? WEXITSTATUS(status):-1);

MTP_DBG( "Parent process: after waiting child, res = %d\n ", res) ;

return TRUE;
/* strerror(errno) can get the cause */
}

return FALSE;

}

[解决办法]
UP