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01 // PROJECT AT A GLANCE

42SH

C

The final shell: history, completion, aliases, scripting — a real terminal, as a team.

The project closing the first year on the system side: taking the two previous shells and bringing them up to the level of a tool you can genuinely use. History navigable with the arrow keys, aliases loaded from a configuration file, wildcards on file names, nested command execution between backticks, conditional chaining. It is the largest group project of the year, and the one where architecture decides everything: whatever was not planned upfront ends up never being done.

An advanced team shell: raw-mode line editing through termios and termcap, navigable history, aliases loaded from a .42shrc, globbing, inhibitors, backticks, parentheses and && / || operators grafted onto the minishell2 command tree.

PRIMARYC
DELIVERY4-PERSON TEAM
VERIFICATIONCriterion
SOURCEINSPECTOR READY
MEDIA ATTACHMENTS (Images, Photos, Videos)

02 // PROJECT SIGNALS

DATE:
2018
PRIMARY LANG:
C
GRADE:
A
DURATION:
2 weeks
SECONDARY:
—
STACK:
ncurses / termcap

03 // KEY OUTCOMES

  • Line editing hand-written in raw terminal mode, without readline
  • Completion by longest common prefix search, persistent history recallable by pattern
  • Four to five contributors on the same codebase: the internal interfaces had to hold before the code could move

BEYOND THE BRIEF

  • Full globbing, including inhibitors (inhibitors.c)
  • Backticks with their own mini string-manipulation library (sources/backticks/)
  • Line editing written by hand rather than readline
  • Sixteen Criterion test files

04 // SOURCE TREE

READING SOURCE…