ft_ls

For knowing the filesystem inside out, and how files and directories are sorted, you will code by yourself one of the most used command: ls.

Features

Mandatory features:

• Support of the following flags/options:
  • -l, displays the files in a column style, showing more information
  • -a, displays hidden files too
  • -r, reverses the order of the files
  • -t, sorts files based on their last modified time
  • -R, displays subfolder contents recursively
• An identical as possible display to the original ls

Bonus stuff:

• Management of ACL & extended attributes
• Management of columns without -l (using /dev/tty and ioctl)
• Usage of the LS_COLORS environment variable and the --color flag
• Support of the following flags/options:
  • --zero, ends each line with a NUL character, not a newline
  • -A, displays almost all hidden files (this excludes . and ..)
  • -1, lists only one file per line

Bonus functions

Since the subject allows for uses of other functions for the bonus part, here are the functions used:

function name	header	usage
ioctl	<sys/ioctl.h>	getting the current TTY's display size

References

• Parsing LS_COLORS: https://linuxhint.com/ls_colors_bash/
• Understanding some flags: https://github.com/coreutils/coreutils/blob/master/src/ls.c