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man pages section 3: Extended Library Functions, Volume 4

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Updated: Thursday, June 13, 2019
 
 

acltotext(3SEC)

Name

acltotext, aclfromtext - convert internal representation to or from external representation

Synopsis

cc [ flag... ] file... –lsec [ library... ]
#include <sys/acl.h>

char *acltotext(aclent_t *aclbufp, int aclcnt);
aclent_t *aclfromtext(char *acltextp, int *aclcnt);

Description

The acltotext() function converts an internal ACL representation pointed to by aclbufp into an external ACL representation. The space for the external text string is obtained using malloc(3C). The caller is responsible for freeing the space upon completion..

The aclfromtext() function converts an external ACL representation pointed to by acltextp into an internal ACL representation. The space for the list of ACL entries is obtained using malloc(3C). The caller is responsible for freeing the space upon completion. The aclcnt argument indicates the number of ACL entries found.

An external ACL representation is defined as follows:

<acl_entry>[,<acl_entry>] . . .

Each <acl_entry> contains one ACL entry. The external representation of an ACL entry contains two or three colon-separated fields. The first field contains the ACL entry tag type. The entry type keywords are defined as:

user

This ACL entry with no UID specified in the ACL entry ID field specifies the access granted to the owner of the object. Otherwise, this ACL entry specifies the access granted to a specific user-name or user-id number.

group

This ACL entry with no GID specified in the ACL entry ID field specifies the access granted to the owning group of the object. Otherwise, this ACL entry specifies the access granted to a specific group-name or group-id number.

other

This ACL entry specifies the access granted to any user or group that does not match any other ACL entry.

mask

This ACL entry specifies the maximum access granted to user or group entries.

default:user

This ACL entry with no uid specified in the ACL entry ID field specifies the default access granted to the owner of the object. Otherwise, this ACL entry specifies the default access granted to a specific user-name or user-ID number.

default:group

This ACL entry with no gid specified in the ACL entry ID field specifies the default access granted to the owning group of the object. Otherwise, this ACL entry specifies the default access granted to a specific group-name or group-ID number.

default:other

This ACL entry specifies the default access for other entry.

default:mask

This ACL entry specifies the default access for mask entry.

The second field contains the ACL entry ID, as follows:

uid

This field specifies a user-name, or user-ID if there is no user-name associated with the user-ID number.

gid

This field specifies a group-name, or group-ID if there is no group-name associated with the group-ID number.

empty

This field is used by the user and group ACL entry types.

The third field contains the following symbolic discretionary access permissions:

r

read permission

w

write permission

x

execute/search permission

no access

Return Values

Upon successful completion, the acltotext() function returns a pointer to a text string. Otherwise, it returns NULL.

Upon successful completion, the aclfromtext() function returns a pointer to a list of ACL entries. Otherwise, it returns NULL.

Attributes

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Interface Stability
Committed
MT-Level
Unsafe

See Also

acl(2), malloc(3C), attributes(7)