sdfchmod(1)

NAME

sdfchmod − change mode of an SDF file

SYNOPSIS

sdfchmod mode device:file...

DESCRIPTION

sdfchmod is intended to mimic chmod(1).

An SDF file name is recognized by the embedded colon (:) delimiter (see sdf(4) for SDF file naming conventions).

The permissions of each named file are changed according to mode, which may be absolute or symbolic. An absolute mode is an octal number constructed from the OR of the following modes:

4000 set user ID on execution

2000 set group ID on execution

1000 sticky bit, see chmod(2)

0400 read by owner

0200 write by owner

0100 execute (search in directory) by owner

0070 read, write, execute (search) by group

0007 read, write, execute (search) by others.

A symbolic mode has the form:

[who] op permission [op permission]

who is a combination of the letters u (for user’s permissions), g (group), and o (other). The letter a (all) is a synomym for ugo, which is the default if who is omitted.

op can be + to add permission to the file’s mode, − to take away permission, or = to assign permission absolutely (all other bits are reset).

permission is any combination of the letters r (read), w (write), x (execute), s (set owner or group ID) and t (save text − sticky); u, g, or o indicate that permission is to be taken from the current mode. Omitting permission is only useful with = to take away all permissions.

Multiple symbolic modes separated by commas may be given. Operations are performed in the order specified. The letter s is only useful with u or g; t works only with u.

EXAMPLES

The following examples assume that an SDF directory structure exists on the HP-UX device file /dev/rdsk/c1d0s3.

Deny write permission to others for the SDF directory /bin:

sdfchmod o−w /dev/rdsk/c1d0s3:/bin

Make the SDF file /users/fred/a.out executable and readable by everyone:

sdfchmod a=rx /dev/rdsk/c1d0s3:/users/fred/a.out

Add read permission for the group associated with the SDF file /last.boot.rev:

sdfchmod g+r /dev/rdsk/c1d0s3:/last.boot.rev

Assign read and execute permission to everybody, and set the set-user-id bit for the SDF file /usr/local/hoo:

sdfchmod 4555 /dev/rdsk/c1d0s3:/usr/local/hoo

These two commands perform the same function: give read, write, and execute permission to the owner; and read and execute permissions to everybody else for the SDF file /users/debbie/script:

sdfchmod a=rx,u+w /dev/rdsk/c1d0s3:/users/debbie/script

sdfchmod 755 /dev/rdsk/c1d0s3:/users/debbie/script

AUTHOR

sdfchmod was developed by HP.

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