z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

chmod
Examples
If the RACF profile named FILE.GROUPOWNER.SETGID exists in
the UNIXPRIV class, then the set-group-ID bit for a directory
determines how the group owner is initialized for new objects
created within the directory:
v If the set-gid bit is on, then the owning GID is set to that of the
directory.
v If the set-gid bit is off, then the owning GID is set to the effective
GID of the process.
t This represents the sticky bit. For a file, the sticky bit causes a search for
the program in the user’s STEPLIB, the link pack area, or link list
concatenation. For a directory, the sticky bit allows files in a directory or
subdirectories to be deleted or renamed only by the owner of the file, by the
owner of the directory, or by a superuser.
You can specify multiple symbolic names if you separate them with commas.
Absolute modes are octal numbers specifying the complete list of attributes for the
files; you specify attributes by ORing together these bits.
4000 Set-user-ID bit
2000 Set-group-ID bit
1000 Sticky bit
0400 User read
0200 User write
0100 User execute (or list directory)
0040 Group read
0020 Group write
0010 Group execute
0004 Other read
0002 Other write
0001 Other execute
1. To remove write permission from orgcht:
chmod –w orgcht
2. To turn on read, write, and execute permissions, and turn off the set-user-ID bit,
set-group-ID bit, and sticky bit attributes. This is equivalent to chmod 0777
aprsal:
chmod a=rwx aprsal
3. To set all permission bits on (anyone can read/write/execute):
chmod 777 scratch
4. To set user (owner) executable permission bit on:
chmod u+x file
5. To set group read / write permission bits:
chmod g+rw file
6. To set other write permission off on 2 files:
chmod o-w file1 file2
7. To set group read/write/execute permissions on the directory /public/teamdir
and all its files and subdirectories:
chmod -R g+rwx /public/teamdir
8. To set group read/execute on, group write off on /u/ateam/pgm:
chmod g=rx /u/ateam/pgm
126 z/OS V1R9.0 UNIX System Services Command Reference