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

mkdir
Description
Options
Localization
The mkdir command creates a new directory for each named directory argument.
The mode for a directory created by mkdir is determined by taking the initial mode
setting of 777 (a=rwx) or the value of –m if specified and applying the umask to it.
–m mode
Lets you specify permissions for the directories. The mode argument can
have the same value as the mode for chmod; see chmod for more details.
You can also set the sticky bit on for directories. For more information, see
chmod. The umask value is applied to the mode value to determine the
new directory’s actual mode setting.
Note: A superuser or the file owner can use a chmod command or chmod()
function to change two options for an executable file. The options
are set in two file mode bits:
v Set-user-ID (S_ISUID) with the setuid option
v Set-group-ID (S_ISGID) with the setgid option
If one or both of these bits are on, the effective UID, effective GID,
or both, plus the saved UID, saved GID, or both, for the process
running the program are changed to the owning UID, GID, or both,
for the file. This change temporarily gives the process running the
program access to data the file owner or group can access.
In a new file, both bits are set off. Also, if the owning UID or GID of a
file is changed or if the file is written in, the bits are turned off. In
shell scripts, these bits are ignored.
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.
–p Creates intermediate directory components that don’t already exist. For
example, if one of the directory arguments is dir/subdir/subsub and
subdir doesn’t already exist, mkdir creates it. Such intermediate directories
are created with mode bits determined in the following way: Take a default
mode setting of 777 (a=rwx), apply the process’s umask setting to it, and
then turn on the user write and user execute permissions (u+wx). The –m
mode specification on the command line is not used for computing the
mode of intermediate directories.
mkdir uses the following localization environment variables:
v LANG
v LC_ALL
v LC_CTYPE
v LC_MESSAGES
426 z/OS V1R9.0 UNIX System Services Command Reference