File System Commands#

• fs_cat

• fs_cd

• fs_cp

• fs_date

• fs_df

• fs_ls

• fs_lsblk

• fs_mkdir

• fs_mkfs

• fs_mount

• fs_mv

• fs_od

• fs_pwd

• fs_rm

• fs_rmdir

• fs_touch

• fs_umount

• fs_wc

fs_cat#

Description#

Print file contents to the terminal output. File contents, in the ASCII character set.

Non-printable/non-space characters are transmitted as full stops (“periods”, character code 46).

For a more convenient display of binary files use fs_od.

Requirements#

File System Core

Synopsis#

fs_cat [file]

Arguments#

Notes / Warnings#

None.

fs_cd#

Description#

Change the working directory.

Requirements#

File System Core

Synopsis#

fs_cd [dir]

Arguments#

Notes / Warnings#

The new working directory is formed in three steps:

1. If the argument dir begins with the path separator character (slash, ‘\’) or a volume name, it will be interpreted as an absolute directory path and will become the preliminary working directory. Otherwise the preliminary working directory path is formed by the concatenation of the current working directory, a path separator character and dir.

2. The preliminary working directory path is then refined, from the first to last path component:

   1. If the component is a ‘dot’ component, it is removed

   2. If the component is a ‘dot dot’ component, and the preliminary working directory path is not NULL, the previous path component is removed. In any case, the ‘dot dot’ component is removed.

   3. Trailing path separator characters are removed, and multiple path separator characters are replaced by a single path separator character.

The volume is examined to determine whether the preliminary working directory exists. If it does, it becomes the new working directory. Otherwise, an error is output, and the working directory is unchanged.

fs_cp#

Description#

Copy a file.

Requirements#

File System Core

Synopsis#

fs_cp [source_file] [dest_file]

Arguments#

Notes / Warnings#

1. In the first form of this command, neither argument may be an existing directory. The contents of source_file will be copied to a file named dest_file located in the same directory as source_file.

2. In the second form of this command, the first argument must not be an existing directory and the second argument must be an existing directory. The contents of source_file will be copied to a file with name formed by concatenating dest_dir, a path separator character and the final component of source_file.

fs_date#

Description#

Write the date and time to terminal output, or set the system date and time.

Requirements#

file System Core

Synopsis#

fs_date

fs_date [time]

Arguments#

time

If specified, time to set, in the form mmddhhmmccyy:

Example: fs_date 092123591989

-h

Displays a description of the command.

Example: fs_date -h

Notes / Warnings#

None.

fs_df#

Description#

Report disk free space.

Requirements#

File System Core

Synopsis#

fs_df

fs_df [vol]

Arguments#

Notes / Warnings#

None.

fs_ls#

Description#

List directory contents.

Requirements#

File System Core

Synopsis#

fs_ls

Arguments#

None.

Notes / Warnings#

The output resembles the output from the standard UNIX command ls -l. See the figure below.

fs_lsblk#

Description#

List all open block devices and display information about each partition composing the block device.

Requirements#

File System Core

Synopsis#

fs_lsblk

Arguments#

None.

Notes / Warnings#

The output resembles the output from the standard UNIX command lsblk -l. See the figure below.

fs_mkdir#

Description#

Make a directory.

Requirements#

File System Core

Synopsis#

fs_mkdir [dir]

Arguments#

Notes / Warnings#

None.

fs_mkfs#

Description#

Format a volume.

Requirements#

File System Core

Usages#

fs_mkfs [vol]

Arguments#

Notes / Warnings#

None.

fs_mount#

Description#

Mount volume.

Requirements#

File System Core

Usages#

fs_mount [dev] [part] [vol]

Arguments#

Notes / Warnings#

None.

fs_mv#

Description#

Move files.

Requirements#

File System Core

Synopsis#

fs_mv [source_entry] [dest_entry]

Arguments#

Notes / Warnings#

1. In the first form of this command, the second argument must not be an existing directory. The file source_entry will be renamed dest_entry.

2. In the second form of this command, the second argument must be an existing directory. source_entry will be renamed to an entry with name formed by concatenating dest_dir, a path separator character and the final component of source_entry.

In both forms, if source_entry is a directory, the entire directory tree rooted at source_entry will be copied and then deleted. Additionally, both source_entry and dest_entry or dest_dir must specify locations on the same volume.

fs_od#

Description#

Dump file contents to the terminal output.

Requirements#

File System Core

Synopsis#

fs_od [file]

Arguments#

Notes / Warnings#

None.

fs_pwd#

Description#

Write to terminal output pathname of current working directory.

Requirements#

File System Core

Synopsis#

fs_pwd

Arguments#

None.

Notes / Warnings#

None.

fs_rm#

Description#

Remove a file.

Requirements#

File System Core

Synopsis#

fs_rm [file]

Arguments#

Notes / Warnings#

None.

fs_rm#

Description#

Remove a file.

Requirements#

File System Core

Synopsis#

fs_rm [file]

Arguments#

Notes / Warnings#

None.

fs_rmdir#

Description#

Remove a directory.

Requirements#

File System Core

Synopsis#

fs_rmdir [dir]

Arguments#

Notes / Warnings#

None.

fs_touch#

Description#

Change file modification time.

Requirements#

File System Core

Synopsis#

fs_touch [file]

Arguments#

Notes / Warnings#

The file modification time is set to the current time.

fs_umount#

Description#

Unount volume.

Requirements#

File System Core

Synopsis#

fs_umount [vol]

Arguments#

Notes / Warnings#

None.

fs_wc#

Description#

Determine the number of newlines, words and bytes in a file.

Requirements#

File System Core

Synopsis#

fs_wc [file]

Arguments#

Notes/Warnings#

None.