getconf - Get configuration values

getconf [ name [ pathname ] ]

Description

The getconf utility displays the POSIX configuration variables. If you specify name, getconf displays the value of the configuration variable on standard output. When the configuration variable depends on a path name you must specify pathname.

When no arguments are specified, getconf displays a list of all the configuration variables and their values. For those configuration variables that depend on a path name, getconf uses /.

Options

None.

Operands

If specified, name is one of these values:

CCSID

Represents the default coded character set identifier (CCSID) used internally for integrated file system path names.

CHOWN_RESTRICTED

Restrict the use of chown on the object represented by pathname to a job with appropriate privileges.

CLK_TCK

The number of clock ticks in a second.

LINK_MAX

Maximum number of links the object represented by pathname can have.

NAME_MAX

Maximum number of bytes in a file name (the last component of the path name).

NGROUPS_MAX

Maximum number of supplementary group IDs that can be associated with a job.

NO_TRUNC

Generate an error if a file name is longer than NAME_MAX.

OPEN_MAX

Maximum number of files a single job can have open at one time.

PAGE_SIZE

Represents the system hardware page size.

PAGESIZE

Represents the system hardware page size.

PATH_MAX

Maximum number of bytes in a complete path name.

PIPE_BUF

Maximum number of bytes that can be written atomically to a pipe.

STREAM_MAX

Maximum number of streams that a job can have open at one time.

THREAD_SAFE

The object represented by pathname resides in a thread-safe file system.

Exit Status

• 0 when successful.
• >0 when successful.

1. Determine if the directory /home is in a thread-safe file system:

   getconf THREAD_SAFE /home
   

2. Display the maximum number of bytes in a file name:

   getconf NAME_MAX
   

3. Display all of the configuration variables:

   getconf