31 Input/output library [input.output]

31.12 File systems [filesystems]

31.12.8 Enumerations [fs.enum]

31.12.8.4 Enum class perms [fs.enum.perms]

The enum class type perms is a bitmask type ([bitmask.types]) that specifies bitmask constants used to identify file permissions, with the meanings listed in Table 137.
Table 137: Enum class perms[tab:fs.enum.perms]
Name
Value
POSIX
Definition or notes
(octal)
macro
none
0
There are no permissions set for the file.
owner_read
0400
S_IRUSR
Read permission, owner
owner_write
0200
S_IWUSR
Write permission, owner
owner_exec
0100
S_IXUSR
Execute/search permission, owner
owner_all
0700
S_IRWXU
Read, write, execute/search by owner;
owner_read | owner_write | owner_exec
group_read
040
S_IRGRP
Read permission, group
group_write
020
S_IWGRP
Write permission, group
group_exec
010
S_IXGRP
Execute/search permission, group
group_all
070
S_IRWXG
Read, write, execute/search by group;
group_read | group_write | group_exec
others_read
04
S_IROTH
Read permission, others
others_write
02
S_IWOTH
Write permission, others
others_exec
01
S_IXOTH
Execute/search permission, others
others_all
07
S_IRWXO
Read, write, execute/search by others;
others_read | others_write | others_exec
all
0777
owner_all | group_all | others_all
set_uid
04000
S_ISUID
Set-user-ID on execution
set_gid
02000
S_ISGID
Set-group-ID on execution
sticky_bit
01000
S_ISVTX
Operating system dependent.
mask
07777
all | set_uid | set_gid | sticky_bit
unknown
0xFFFF
The permissions are not known, such as when a file_status object is created without specifying the permissions