30 Input/output library [input.output]

30.10 File systems [filesystems]

30.10.10 Enumerations [fs.enum]

30.10.10.4 Enum class perms [fs.enum.perms]

The enum class type perms is a bitmask type that specifies bitmask constants used to identify file permissions, with the meanings listed in Table 125.
Table 125 — Enum class 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