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On POSIX systems, the file descriptor for standard input is 0 (zero); the POSIX <unistd.h> definition is STDIN_FILENO; the corresponding C <stdio.h> abstraction is provided via the FILE* stdin global variable. Similarly, the global C++ std::cin variable of type <iostream> provides an abstraction via C++ streams.
Executable compression can be used to prevent direct disassembly, mask string literals and modify signatures. Although this does not eliminate the chance of reverse engineering, it can make the process more costly. A compressed executable requires less storage space in the file system, thus less time to transfer data from the file system into ...
File descriptors for a single process, file table and inode table. Note that multiple file descriptors can refer to the same file table entry (e.g., as a result of the dup system call [3]: 104 ) and that multiple file table entries can in turn refer to the same inode (if it has been opened multiple times; the table is still simplified because it represents inodes by file names, even though an ...
py2exe is a Python extension which converts Python scripts (.py) into Microsoft Windows executables (.exe). These executables can run on a system without Python installed. [3] It is the most common tool for doing so.
An ELF file has two views: the program header shows the segments used at run time, whereas the section header lists the set of sections. In computing , the Executable and Linkable Format [ 2 ] ( ELF , formerly named Extensible Linking Format ) is a common standard file format for executable files, object code , shared libraries , and core dumps .
The symbol table may be stored within the executable, or it may exist in separate files. A debugger can then read the symbol table to help the programmer interactively debug the machine code in execution. The SHARE Operating System (1959) for the IBM 709, IBM 7090, and IBM 7094 computers allowed for an loadable code format named SQUOZE.
The extraction to temporary file method has several disadvantages: Special permissions are ignored, such as suid. argv[0] will not be meaningful. Multiple running instances of the executable are unable to share common segments. Unmodified UPX packing is often detected and unpacked by antivirus software scanners. UPX also has a built-in feature ...
The definition of an exception is based on the observation that each procedure has a precondition, a set of circumstances for which it will terminate "normally". [1] An exception handling mechanism allows the procedure to raise an exception [ 2 ] if this precondition is violated, [ 1 ] for example if the procedure has been called on an abnormal ...