setflabel man page on SunOS

setflabel man page on SunOS

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setflabel(3TSOL) Trusted Extensions Library Functions setflabel(3TSOL)

NAME
setflabel - move file to zone with corresponding sensitivity label

SYNOPSIS
cc [flag...] file... -ltsol [library...]

#include <tsol/label.h>

int setflabel(const char *path, const m_label_t *label_p);

DESCRIPTION
The file that is named by path is relabeled by moving it to a new path‐
name relative to the root directory of the zone corresponding to
label_p. If the source and destination file systems are loopback
mounted from the same underlying file system, the file is renamed. Oth‐
erwise, the file is copied and removed from the source directory.

The setflabel() function enforces the following policy checks:

o If the sensitivity label of label_p equals the existing sen‐
sitivity label, then the file is not moved.

o If the corresponding directory does not exist in the desti‐
nation zone, or if the directory exists, but has a different
label than label_p, the file is not moved. Also, if the file
already exists in the destination directory, the file is not
moved.

o If the sensitivity label of the existing file is not equal
to the calling process label and the caller is not in the
global zone, then the file is not moved. If the caller is in
the global zone, the existing file label must be in a
labeled zone (not ADMIN_LOW or ADMIN_HIGH).

o If the calling process does not have write access to both
the source and destination directories, then the calling
process must have PRIV_FILE_DAC_WRITE in its set of effec‐
tive privileges.

o If the sensitivity label of label_p provides read only
access to the existing sensitivity label (an upgrade), then
the user must have the solaris.label.file.upgrade authoriza‐
tion. In addition, if the current zone is a labeled zone,
then it must have been assigned the privilege
PRIV_FILE_UPGRADE_SL when the zone was configured.

o If the sensitivity label of label_p does not provide access
to the existing sensitivity label (a downgrade), then the
calling user must have the solaris.label.file.downgrade
authorization. In addition, if the current zone is a labeled
zone, then it must have been assigned the privilege
PRIV_FILE_DOWNGRADE_SL when the zone was configured.

o If the calling process is not in the global zone, and the
user does not have the solaris.label.range authorization,
then label_p must be within the user's label range and
within the system accreditation range.

o If the existing file is in use (not tranquil) it is not
moved. This tranquility check does not cover race conditions
nor remote file access.

Additional policy constraints can be implemented by customizing the
shell script /etc/security/tsol/relabel. See the comments in this file.

RETURN VALUES
Upon successful completion, setflabel() returns 0. Otherwise it returns
-1 and sets errno to indicate the error.

ERRORS
The setflabel() function fails and the file is unchanged if:

EACCES Search permission is denied for a component of the path
prefix of path.

The calling process does not have mandatory write
access to the final component of path because the sen‐
sitivity label of the final component of path does not
dominate the sensitivity label of the calling process
and the calling process does not have
PRIV_FILE_MAC_WRITE in its set of effective privileges.

EBUSY There is an open file descriptor reference to the final
component of path.

ECONNREFUSED A connection to the label daemon could not be estab‐
lished.

EEXIST A file with the same name exists in the destination
directory.

EINVAL Improper parameters were received by the label daemon.

EISDIR The existing file is a directory.

ELOOP Too many symbolic links were encountered in translating
path.

EMLINK The existing file is hardlinked to another file.

ENAMETOOLONG The length of the path argument exceeds PATH_MAX.

ENOENT The file referred to by path does not exist.

EROFS The file system is read-only or its label is ADMIN_LOW
or ADMIN_HIGH.

ATTRIBUTES
See attributes(5) for descriptions of the following attributes:

┌───────────────────────┬───────────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├───────────────────────┼───────────────────────────────────┤
│Interface Stability │ Committed │
├───────────────────────┼───────────────────────────────────┤
│MT-Level │ MT-Safe │
└───────────────────────┴───────────────────────────────────┘