'\" te
.\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved.
.TH getpathbylabel 3TSOL "20 Jul 2007" "SunOS 5.11" "Trusted Extensions Library Functions"
.SH NAME
getpathbylabel \- return the zone pathname
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [\fIflags\fR...] \fIfile\fR... \fB-ltsol\fR [\fIlibrary\fR...]
.fi

.LP
.nf
#include <tsol/label.h>

\fBchar *\fR\fBgetpathbylabel\fR(\fBconst char *\fR\fIpath\fR, \fBchar *\fR\fIresolved_path\fR,
     \fBsize_t\fR \fIbufsize\fR, \fBconst m_label_t *\fR\fIsl\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBgetpathbylabel()\fR function expands all symbolic links and resolves references to '/./', '/../', extra '/' characters, and stores the zone pathname in the buffer named by \fIresolved_path\fR. The \fIbufsize\fR argument specifies the size in bytes of this buffer. The resulting path will have no symbolic links components, nor any '/./', '/.\|./'. This function can only be called from the global zone.
.sp
.LP
The zone pathname is relative to the sensitivity label \fIsl\fR. To specify a sensitivity label for a zone name which does not exist, the process must assert either the \fBPRIV_FILE_UPGRADE_SL\fR or \fBPRIV_FILE_DOWNGRADE_SL\fR privilege depending on whether the specified sensitivity label dominates or does not dominate the process sensitivity label.
.SH RETURN VALUES
.sp
.LP
The \fBgetpathbylabel()\fR function returns a pointer to the \fIresolved_path\fR on success. Otherwise it returns \fINULL\fR and sets \fIerrno\fR to indicate the error.
.SH ERRORS
.sp
.LP
The \fBgetpathbylabel()\fR function will fail if:
.sp
.ne 2
.mk
.na
\fB\fBEACCES\fR\fR
.ad
.RS 16n
.rt  
Search permission is denied for a component of the path prefix of \fIpath\fR.
.RE

.sp
.ne 2
.mk
.na
\fB\fBEFAULT\fR\fR
.ad
.RS 16n
.rt  
\fIresolved_path\fR extends outside the process's allocated address space or beyond \fIbufsize\fR bytes.
.RE

.sp
.ne 2
.mk
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 16n
.rt  
\fIpath\fR or \fIresolved_path\fR was \fINULL\fR, current zone is not the global zone, or \fIsl\fR is invalid.
.RE

.sp
.ne 2
.mk
.na
\fB\fBEIO\fR\fR
.ad
.RS 16n
.rt  
An \fBI/O\fR error occurred while reading from or writing to the file system.
.RE

.sp
.ne 2
.mk
.na
\fB\fBELOOP\fR\fR
.ad
.RS 16n
.rt  
Too many symbolic links were encountered in translating \fIpath\fR.
.RE

.sp
.ne 2
.mk
.na
\fB\fBENAMETOOLONG\fR\fR
.ad
.RS 16n
.rt  
The length of the path argument exceeds \fIPATH_MAX\fR, or a pathname component is longer than \fINAME_MAX\fR (see \fBsysconf\fR(3C)) while \fB_POSIX_NO_TRUNC\fR is in effect (see \fBpathconf\fR(2)). 
.RE

.sp
.ne 2
.mk
.na
\fB\fBENOENT\fR\fR
.ad
.RS 16n
.rt  
The named file does not exist.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelMT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBreadlink\fR(2), \fBgetzonerootbyid\fR(3TSOL), \fBlibtsol\fR(3LIB), \fBattributes\fR(5), \fBlabels\fR(5)
.SH WARNINGS
.sp
.LP
The \fBgetpathbylabel()\fR function indirectly invokes the \fBreadlink\fR(2) system call, and hence inherits the possibility of hanging due to inaccessible file system resources.
.SH NOTES
.sp
.LP
The functionality described on this manual page is available only if the system is configured with Trusted Extensions.