How to Actually Learn C (2027 Edition)
This is a quick and painless tutorial on starting to impelement Coreutils 'ls' in C.
Repo: https://github.com/tonybanters/lsbtw
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Music:
• Shingeki no Kyojin - EYE WATER - Soft Pian...
• Succession Main Theme - Piano (Advance dif...
Chapters
0:00 Intro
1:15 The Plan: ls, ls -a, ls -l
2:10 Your First C Program: main()
2:45 Compiling with GCC
3:27 printf and Header Files
4:13 Command-Line Args: argc & argv
5:59 Handling a Missing Argument
6:53 Opening a Directory: opendir
8:21 Error Handling with perror
9:36 Reading Entries: readdir
11:23 Looping Over the Directory
12:01 Hiding Dotfiles & closedir
13:18 Parsing -a with getopt
16:47 Implementing -l: The stat Syscall
17:44 Building the Permission String
21:20 Owner & Group Lookups
22:26 print_long & lstat
25:57 First Test: Permissions, User, Group
26:49 Formatting the Date with strftime
28:43 Adding Size & Link Count
29:33 Wiring Up the -l Flag
30:34 Final Demo: ls -l and ls -la
31:06 Obligatory Neofetch
#linux #c #programming