The lchown service changes the owner or group (or both) of a file or a directory. The owner is identified by a user ID (UID) and a group ID (GID).
The lchown service is identical to the chown service, except when the Pathname specified is a symbolic link (a pointer to another file or directory). If the Pathname is a symbolic link, the UID and/or the GID of the symbolic link are updated, rather than the UID or GID of the file to which the symbolic link refers. See chown (BPX1CHO, BPX4CHO) — Change the owner or group of a file or directory.
Operation | Environment |
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Authorization: | Supervisor state or problem state, any PSW key |
Dispatchable unit mode: | Task |
Cross memory mode: | PASN = HASN |
AMODE (BPX1LCO): | 31-bit |
AMODE (BPX4LCO): | 64-bit |
ASC mode: | Primary mode |
Interrupt status: | Enabled for interrupts |
Locks: | Unlocked |
Control parameters: | All parameters must be addressable by the caller and in the primary address space. |
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AMODE 64 callers use BPX4LCO with the same parameters.
The name of a fullword that contains the length of the path name of the file for which the owner or group is to be changed.
The name of a field that contains the path name of the file. The length of this field is specified in Pathname_length.
If the path name specifies a symbolic link file, the lchown service changes the ownership of the symbolic link file itself.
The name of a fullword field that contains the new owner UID that is assigned to the file; or the present value or -1, if there is no change. This parameter must be specified.
The name of a fullword field that contains the new owner GID that is assigned to the file; or the present value or -1, if there is no change. This parameter must be specified.
The name of a fullword in which the lchown service returns 0 if the request is successful, or -1 if it is not successful.
Return_code | Explanation |
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EACCES | The calling process does not have permission to search some component of the Pathname prefix. |
EINVAL | The Owner_UID or Group_ID parameter is incorrect. |
ELOOP | A loop exists in symbolic links that were encountered during resolution of the Pathname argument. This error is issued if more than 24 symbolic links are detected in the resolution of Pathname. |
ENAMETOOLONG | Pathname is longer than 1023 characters; or a component of the path name is longer than 255 characters. |
ENOENT | No file named Pathname was found; or no pathname was specified. The following reason code can accompany the return code: JRFileNotThere. |
ENOTDIR | Some component of the Pathname prefix is not a directory. |
EPERM | The calling process does not have appropriate privileges (see Authorization). |
EROFS | Pathname is on a read-only file system. The following reason code can accompany the return code: JRReadOnlyFS. |
The name of a fullword in which the lchown service stores the reason code. The lchown service returns Reason_code only if Return_value is -1. Reason_code further qualifies the Return_code value. For the reason codes, see z/OS UNIX System Services Messages and Codes.
There are no restrictions on the use of the lchown service.
For an example using this callable service, see BPX1LCO (lchown) example.