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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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NS_GET_OWNER_UID(2const) NS_GET_OWNER_UID(2const)
NS_GET_OWNER_UID - discovering the owner of a user namespace
#include <linux/nsfs.h> /* Definition of NS_GET_OWNER_UID */
#include <sys/ioctl.h>
int ioctl(int fd, NS_GET_OWNER_UID, uid_t *uid);
The NS_GET_OWNER_UID operation can be used to discover the owner
user ID of a user namespace (i.e., the effective user ID of the
process that created the user namespace).
fd refers to a /proc/pid/ns/user file.
The owner user ID is returned in the uid_t pointed to by the
third argument.
On success, 0 is returned. On error, -1 is returned, and errno
is set to indicate the error.
EINVAL fd does not refer to a user namespace.
Linux.
Linux 4.11.
ioctl(2), ioctl_nsfs(2)
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Linux man-pages 6.9.1 2024-06-13 NS_GET_OWNER_UID(2const)
Pages that refer to this page: ioctl_nsfs(2)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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