10.3.26 isDir (evaluates existence of directory)

Syntax

isDir  directory-path-name

Description

This command evaluates whether the file specified for argument exists. File is not considered not to be directory.

This command outputs 1 in the following cases:

• Directory exists.

This command outputs 0.

• Directory does not exist.

Arguments

directory-path-name

This command specifies the path name of the directory to be evaluated.

Output to the standard output

1 or 0.

Return codes

Return code	Meaning
0	Normal termination
Not less than 1	Termination with an error

Examples

If the directory test exists and directory prog does not exist:
isDir test          # "1" is output.
isDir prog          # "0" is output.

# If the directory dir1 does not exist, create dir1.
result=$(isDir dir1)
if [[ $result -eq 0 ]]; then
  mkdir dir1
fi