Winter 25, CSCI 347, Test 2 Review

Test date: Friday February 21, 2025

Quick Review: Parts of chapters 4, 5, 6, 7, 8(part), 15(part), and your microshell.

Topic Review:

• Files and Directories (Chapter 4)
• partitions
• UNIX file system, disk partitions
• file types
• Directory entries: (name, inode-number)
• link
• inode: data stored and access to file data via direct and indirect blocks
• Ownership of a file
• stat, fstat, lstat
• permissions, user/group/other
• Set UID, Set GID bits
• umask
• access
• chmod, fchmod
• chown, fchown
• link (hard links)
• unlink
• rename
• symbolic links
• utimes
• mkdir
• rmdir
• chdir
• fchdir
• fsync
• opendir, closedir, readdir, telldir, seekdir, rewinddir, dirfd, dirent
• Standard I/O Library (Chapter 5)
• stdin, stdout, stderr
• buffering, full, line, unbuffered
• fopen, freopen, fdopen
• setbuf, setvbuf
• fflush
• fclose
• fgetc, ferror, feof, clearerr, ungetc
• fgets, fputs
• binary fread, fwrite
• ftell, fseek
• fgetpos, fsetpos
• *printf, *scanf
• fileno
• System Information (Chapter 6)
• /etc/passwd, /etc/group
• getpwuid, getpwnam, getpwent, setpwent, endpwent
• getgrgid, getgrnam, getgrent, setgrent, endgrent
• Supplementary Group IDs
• /etc, information stored there
• uname(1), uname(3)
• time related functions (time, ctime, strftime, gettimeofday, ...)
• time zone issues
• Environment of UNIX process (Chapter 7, on video)
• main, argc, argv
• exit, _exit
• atexit
• environment, getenv, putenv, setenv, unsetenv
• Memory layout, malloc, alloca, free, realloc, calloc
• automatic (local) variable misuse
• setjmp, longjmp
• resource limits
• Process Control (Chapter 8)
• pid, gid
• fork, exit
• wait(2) system call and WIFEXITED(), WEXITSTATUS() macros
• waitpid(2) system call
• wait, waitpid, wait3, wait4
• zombie processes, how to kill them
• Pipes (Chapter 15)
• Interprocess communication with pipes ...
• Shell pipeline
• Filter abstraction
• Kernel pipe, pipe(2)
• Read end, write end
• Termination: EOF on read, SIGPIPE on write
• Conditions for termination
• Outlines of one way communcation: child to parent, parent to child
• popen(3), pclose(3)
• micro shell
• concepts
• exit values, getting exit values
• expansion, environment variables, builtin commands
• shell scripts, script arguments