diff options
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/sys/mount.2 | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/lib/libc/sys/mount.2 b/lib/libc/sys/mount.2 index d22f68d..dae53d6 100644 --- a/lib/libc/sys/mount.2 +++ b/lib/libc/sys/mount.2 @@ -74,6 +74,13 @@ at the time of a successful mount are swept under the carpet so to speak, and are unavailable until the file system is unmounted. .Pp +By default only the super-user may call the +.Fn mount +function. +This restriction can be removed by setting the sysctl +.Em vfs.usermount +to a non-zero value. +.Pp The following .Fa flags may be specified to @@ -81,17 +88,19 @@ suppress default semantics which affect file system access. .Bl -tag -width MNT_SYNCHRONOUS .It Dv MNT_RDONLY The file system should be treated as read-only; -Even the super-user may not write on it. +even the super-user may not write on it. Specifying MNT_UPDATE without this option will upgrade a read-only file system to read/write. .It Dv MNT_NOEXEC Do not allow files to be executed from the file system. .It Dv MNT_NOSUID Do not honor setuid or setgid bits on files when executing them. +This flag is set automatically when the caller is not the super-user. .It Dv MNT_NOATIME Disable update of file access times. .It Dv MNT_NODEV Do not interpret special files on the file system. +This flag is set automatically when the caller is not the super-user. .It Dv MNT_SUIDDIR Directories with the SUID bit set chown new files to their own owner. .It Dv MNT_SYNCHRONOUS @@ -178,7 +187,8 @@ The system call will fail when one of the following occurs: .Bl -tag -width Er .It Bq Er EPERM -The caller is not the super-user. +The caller is neither the super-user nor the owner of +.Ar dir . .It Bq Er ENAMETOOLONG A component of a pathname exceeded 255 characters, or the entire length of a path name exceeded 1023 characters. @@ -261,7 +271,9 @@ The system call may fail with one of the following errors: .Bl -tag -width Er .It Bq Er EPERM -The caller is not the super-user. +The caller is neither the super-user nor the user who issued the corresponding +.Xr mount 2 +call. .It Bq Er ENOTDIR A component of the path is not a directory. .It Bq Er ENAMETOOLONG @@ -290,6 +302,7 @@ mounted. .Sh SEE ALSO .Xr lsvfs 1 , .Xr mount 8 , +.Xr sysctl 8 , .Xr umount 8 .Sh BUGS Some of the error codes need translation to more obvious messages. |
