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'\" te .\" Copyright (c) 2007, 2023, Oracle and/or its affiliates. .TH acl 2 "30 Jan 2023" "Oracle Solaris 11.4" "System Calls" .SH NAME acl, facl \- get or set a file's Access Control List (ACL) .SH SYNOPSIS .LP .nf #include <sys/acl.h> \fBint\fR \fBacl\fR(\fBchar *\fR\fIpathp\fR, \fBint\fR \fIcmd\fR, \fBint\fR \fInentries\fR, \fBvoid *\fR\fIaclbufp\fR); .fi .LP .nf \fBint\fR \fBfacl\fR(\fBint\fR \fIfildes\fR, \fBint\fR \fIcmd\fR, \fBint\fR \fInentries\fR, \fBvoid *\fR\fIaclbufp\fR); .fi .SH DESCRIPTION .sp .LP The \fBacl()\fR and \fBfacl()\fR functions get or set the Access Control List (\fBACL\fR) of a file whose name is given by \fIpathp\fR or referenced by the open file descriptor \fIfildes\fR. The \fInentries\fR argument specifies how many \fBACL\fR entries fit into buffer \fIaclbufp\fR. .sp .LP The following types are supported for \fIaclbufp\fR: .sp .ne 2 .mk .na \fB\fBaclent_t\fR\fR .ad .RS 12n .rt Used by the UFS and NFS file systems. .RE .sp .ne 2 .mk .na \fB\fBace_t\fR\fR .ad .RS 12n .rt Used by the ZFS and NFSv4 file systems. .RE .sp .LP These types are described in more detail in the \fBacl\fR(7) manual page. .sp .LP The following values for \fIcmd\fR are supported: .sp .ne 2 .mk .na \fB\fBSETACL\fR\fR .ad .RS 17n .rt \fInentries\fR \fBaclent_t\fR \fBACL\fR entries, specified in buffer \fIaclbufp\fR, are stored in the file's \fBACL\fR. All directories in the path name must be searchable. .RE .sp .ne 2 .mk .na \fB\fBGETACL\fR\fR .ad .RS 17n .rt Buffer \fIaclbufp\fR is filled with the file's \fBaclent_t\fR \fBACL\fR entries. Read access to the file is not required, but all directories in the path name must be searchable. .RE .sp .ne 2 .mk .na \fB\fBGETACLCNT\fR\fR .ad .RS 17n .rt The number of entries in the file's \fBaclent_t\fR \fBACL\fR is returned. Read access to the file is not required, but all directories in the path name must be searchable. .RE .sp .ne 2 .mk .na \fB\fBACE_SETACL\fR\fR .ad .RS 17n .rt \fInentries\fR \fBace_t\fR \fBACL\fR entries, specified in buffer \fIaclbufp\fR, are stored in the file's \fBACL\fR. All directories in the path name must be searchable. Write \fBACL\fR access is required to change the file's \fBACL\fR. .RE .sp .ne 2 .mk .na \fB\fBACE_GETACL\fR\fR .ad .RS 17n .rt Buffer \fIaclbufp\fR is filled with the file's \fBace_t\fR ACL entries. Read access to the file is required and all directories in the path name must be searchable. .RE .sp .ne 2 .mk .na \fB\fBACE_GETACLCNT\fR\fR .ad .RS 17n .rt The number of entries in the file's \fBace_t\fR \fBACL\fR is returned. Read access to the file is required and all directories in the path name must be searchable. .RE .SH RETURN VALUES .sp .LP If \fIcmd\fR is \fBSETACL\fR or \fBACE_SETACL\fR, \fB0\fR is returned upon successful completion. If \fIcmd\fR is \fBGETACL\fR, \fBGETACLCNT\fR, \fBACE_GETACL\fR or \fBACE_GETACLCNT\fR, the number of \fBACL\fR entries is returned upon successful completion. Otherwise, \fB\(mi1\fR is returned and \fBerrno\fR is set to indicate the error. .SH ERRORS .sp .LP The \fBacl()\fR and \fBfacl()\fR functions will fail if: .sp .ne 2 .mk .na \fB\fBEACCES\fR\fR .ad .RS 11n .rt The caller does not have access to a component of the pathname; the \fIcmd\fR argument is \fBACE_SETACL\fR or \fBSETACL\fR and the caller does not have appropriate privilege to set one or more specified \fBACE\fR types. .RE .sp .ne 2 .mk .na \fB\fBEBADF\fR\fR .ad .RS 11n .rt The \fIfiledes\fR argument is not a valid open file descriptor. .RE .sp .ne 2 .mk .na \fB\fBEFAULT\fR\fR .ad .RS 11n .rt The \fIpathp\fR or \fIaclbufp\fR argument points to an illegal address. .RE .sp .ne 2 .mk .na \fB\fBEINVAL\fR\fR .ad .RS 11n .rt The \fIcmd\fR argument is not one of the values listed above; the \fIcmd\fR argument is \fBSETACL\fR and \fInentries\fR is less than 3; or the \fIcmd\fR argument is \fBSETACL\fR or \fBACE_SETACL\fR and the \fBACL\fR specified in \fIaclbufp\fR is not valid. .RE .sp .ne 2 .mk .na \fB\fBEIO\fR\fR .ad .RS 11n .rt A disk I/O error has occurred while storing or retrieving the \fBACL\fR. .RE .sp .ne 2 .mk .na \fB\fBENOENT\fR\fR .ad .RS 11n .rt A component of the path does not exist. .RE .sp .ne 2 .mk .na \fB\fBENOSPC\fR\fR .ad .RS 11n .rt The \fIcmd\fR argument is \fBGETACL\fR and \fInentries\fR is less than the number of entries in the file's \fBACL\fR, or the \fIcmd\fR argument is \fBSETACL\fR and there is insufficient space in the file system to store the \fBACL\fR. .RE .sp .ne 2 .mk .na \fB\fBENOSYS\fR\fR .ad .RS 11n .rt The \fIcmd\fR argument is \fBSETACL\fR or \fBACE_SETACL\fR and the file specified by \fIpathp\fR resides on a file system that does not support \fBACLs\fR. .RE .sp .ne 2 .mk .na \fB\fBENOTDIR\fR\fR .ad .RS 11n .rt A component of the path specified by \fIpathp\fR is not a directory, or the \fIcmd\fR argument is \fBSETACL\fR or \fBACE_SETACL\fR and an attempt is made to set a default \fBACL\fR on a file type other than a directory. .RE .sp .ne 2 .mk .na \fB\fBENOTSUP\fR\fR .ad .RS 11n .rt The \fIcmd\fR argument is \fBGETACL\fR, but the ACL is composed of \fBace_t\fR entries, and the ACL cannot be translated into \fBaclent_t\fR form. .sp The \fIcmd\fR argument is \fBACE_SETACL\fR, but the underlying filesystem only supports ACLs composed of \fBaclent_t\fR entries and the ACL could not be translated into \fBaclent_t\fR form. .RE .sp .ne 2 .mk .na \fB\fBEPERM\fR\fR .ad .RS 11n .rt The effective user \fBID\fR does not match the owner of the file and the process does not have appropriate privilege. .sp The file has one or more of the \fBimmutable\fR or \fBrtime\fR system attributes set. .RE .sp .ne 2 .mk .na \fB\fBEROFS\fR\fR .ad .RS 11n .rt The \fIcmd\fR argument is \fBSETACL\fR or \fBACE_SETACL\fR and the file specified by \fIpathp\fR resides on a file system that is mounted read-only. .RE .SH USAGE .sp .LP To determine which types of \fBACL\fR, if any, are supported with a given file, use the \fBpathconf\fR(2) and \fBfpathconf\fR(2) functions with a value of \fB_PC_ACL_ENABLED\fR for their \fIname\fR argument. .SH ATTRIBUTES .sp .LP See \fBattributes\fR(7) for descriptions of the following attributes: .sp .TS tab( ) box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) . ATTRIBUTE TYPE ATTRIBUTE VALUE _ Interface Stability Committed .TE .sp .SH SEE ALSO .sp .LP \fBfpathconf\fR(2), \fBpathconf\fR(2), \fBaclcheck\fR(3SEC), \fBaclsort\fR(3SEC), \fBacl\fR(7), \fBsysattr\fR(7) .SH HISTORY .sp .LP The \fBace_t\fR type, and the corresponding \fBACE_*\fR values for \fIcmd\fR, were added to Oracle Solaris in Solaris 10 3/05. .sp .LP The \fBacl()\fR and \fBfacl()\fR functions and \fBaclent_t\fR type were added to Solaris in Solaris 2.5.