ULS

Description

The ls command lists files and directories within the file system, and shows detailed information about them. This program works as a system utility ls. During developmnet was implemented:

• the usage: usage: uls [-l] [file ...]
• basic functionality of this command - list of directory contents without flags
• processing of file operands for files and directories
• the -l flag, which is one of the most useful flags
• the view of extended file attributes and access control lists (ACL)
• error handling, as in the original ls . Output uls as the program name instead of ls where necessary
• the multicolumn output format when the option -l isn't specified
• some extra flags:
  • -a (-A) - display all files including the hidden files
  • -C - output in multiple columns sorted by columns
  • -x - output in multiple columns sorted by rows
  • -F - puts a / (slash) after each file name if the file is a directory, an * (asterisk) if the file can be executed, an = (equal sign) if the file is a socket, a | (pipe) sign if the file is a FIFO, and an @ for a symbolic link.
  • -f - lists the name in each slot for each directory specified in the Directory parameter. This flag turns off the -l, -t, -s, and -r flags, and turns on the -a flag. The order of the listing is the order in which entries appear in the directory.
  • -G - colorful output
  • -i - display numbers of file descriptors in the first column
  • -l - displays the mode, number of links, owner, group, size (in bytes), and time of last modification for each file
  • -m - uses stream output format (a comma-separated series)
  • -o - displays the same information as the -l flag, except the -o flag suppresses display of the group and symbolic link information
  • -s - gives size in kilobytes for each entry
  • -p - puts a slash after each file name if that file is a directory
  • -1 - forces output into one-entry-per-line format
  • -r - reverses the order of the sort, giving reverse alphabetic or the oldest first, as appropriate
  • -t - sorts by time of last modification (latest first) instead of by name

Some examples of working

How to start

This program was developed on the MacOS, so it works correctly there.

In folder with cloned project use make to compile project. Start program with ./uls [-aACfFGilmosp1rtx] [file ...].

To delete the program - make uninstall
To delete all 'obj' files - make clean
To reinstall the program - make reinstall