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acl_set_qualifier - Sets the uid or gid on an ACL entry
#include <sys/acl.h>
int acl_set_qualifier(
acl_entry_t entry_d;
void *tag_qualifier_p);
Designates the working storage internal representation ACL entry to set the tag qualifier in. Designates the uid or gid to set the tag qualifier to.
NOTE: This function is based on Draft 13 of the POSIX P1003.6 standard. The function may change as the P1003.6 standard is finalized.
Given an ACL entry, the acl_set_qualifier() function sets the id in the ACL entry. If the tag type of the given ACL entry is ACL_USER then tag_qualifier_p is evaluated as a pointer of type *uid_t. If the tag type of the given ACL entry is ACL_GROUP then tag_qualifier_p is evaluated as a pointer of type *gid_t. Any other ACL tag types results in an error.
Upon successful completion, the acl_set_qualifier() function returns a value of 0 (zero). Otherwise, a value of -1 is returned and errno is set to indicate the error.
If any of the following conditions occur, the acl_set_qualifier() function sets errno to the corresponding value:
Argument entry_d does not refer to a valid ACL entry.
The value of the tag type in ACL entry referred to by entry_d is ACL_USER_OBJ, ACL_GROUP_OBJ, or ACL_OTHER_OBJ.
The value of the entry in tag_qualifier_p is not valid. There is not enough memory available to allocate the ACL uid/gid storage.
acl_free_qualifier(3), acl_get_qualifier(3)
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