What is an executable, shareable, system or UWSS image?
Executable code in OpenVMS typically resides in an image—an image is a file—the file extension is typically .EXE—that contains this code. Common types of images include executable images, shareable images, system images, and protected (UWSS) images. Executable images are programs that can be directly executed. These images can grant enhanced privileges, with an INSTALL of the image with /PRIVILEGE, or can grant enhanced access with the specification of a subsystem identifier on the ACL associated with the image. Shareable images contain code executed indirectly, these images are referenced from executable images and/or from other shareable images. These images can not grant enhanced privileges, even with the use of INSTALL with /PRIVILEGE or a subsystem identifier. These shareable images can be dynamically activated (a LINK that occurs at run-time) via the LIB$FIND_IMAGE_SYMBOL run-time library (RTL) routine. (See `protected images’ for information on `privileged shareable images
Executable code in OpenVMS typically resides in an image-an image is a file-the file extension is typically .EXE-that contains this code. Common types of images include executable images, shareable images, system images, and protected (UWSS) images. Executable images are programs that can be directly executed. These images can grant enhanced privileges, with an INSTALL of the image with /PRIVILEGE, or can grant enhanced access with the specification of a subsystem identifier on the ACL associated with the image. Shareable images contain code executed indirectly, these images are referenced from executable images and/or from other shareable images. These images can not grant enhanced privileges, even with the use of INSTALL with /PRIVILEGE or a subsystem identifier. These shareable images can be dynamically activated (a LINK that occurs at run-time) via the LIB$FIND_ IMAGE_SYMBOL run-time library (RTL) routine. (See `protected images’ for information on `privileged shareable images’.) S
