271 Summary for Final

Allowing 1 page double sided handwritten notes.

Unix Basics with Grep and Sed and Regular Expressions

Filters and Shell Programming

• No loops will be necessary, though you will be allowed to use them.
• Will need to construct a script using input parameters from the command line and using screen i/o

C Programming

• File I/O
  • Code reading from files and writing to files
  • Know how to use the commands : open, read, write, lseek and close - what is their function and what their parameters mean
  • Understand redirection and standard files : 0, 1, 2, stdin, stdout, stderr.
  • Understand what a file descriptor is, how it relates to an inode table, and the file open table, and how to use the file descriptor
  • Know what link and unlink do and be able to trace whether you are copying or deleting or moving a file
  • Know how to access command line parameters
  • Debugging - gdb - commands : (option -g) ; r(un), b(reak), n(ext - step over), s(tep into), p(rint), c(ontinue), l(ist), fin(ish),q(uit)

  • Make files - what they are and how you use a very simple make file - just one compilation line

  • Not included : Know how to lock a portion of a file
  • Not included: Environment variables

 

• Processes and signals

• Fork and Exec; create in c code and understand how the shell uses this as you execute commands such as grep and ls
• Wait and send exit codes; - see with echo $? and use in c code
• Parent, process and child ids; see with ps -f and use in c code.
• Sending signals: see with kill -9 pid and use in c code

Perl

• No loops
• Read from the screen and files
• Will need to construct a perl script using screen I/O and regular expression matching using =~
• Take in parameters from the command line
• Ask the user for input
• Work with arrays