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If applicable, add the following below this CDDL HEADER, with .\" the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner] .TH fpathconf 2 "1 Sep 2009" "SunOS 5.11" "System Calls" .SH NAME fpathconf, pathconf \- get configurable pathname variables .SH SYNOPSIS .LP .nf #include \fBlong\fR \fBfpathconf\fR(\fBint\fR \fIfildes\fR, \fBint\fR \fIname\fR); .fi .LP .nf \fBlong\fR \fBpathconf\fR(\fBconst char *\fR\fIpath\fR, \fBint\fR \fIname\fR); .fi .SH DESCRIPTION .sp .LP The \fBfpathconf()\fR and \fBpathconf()\fR functions determine the current value of a configurable limit or option ( variable ) that is associated with a file or directory. .sp .LP For \fBpathconf()\fR, the \fIpath\fR argument points to the pathname of a file or directory. .sp .LP For \fBfpathconf()\fR, the \fIfildes\fR argument is an open file descriptor. .sp .LP The \fIname\fR argument represents the variable to be queried relative to that file or directory. The variables in the following table come from <\fBlimits.h\fR> or <\fBunistd.h\fR> and the symbolic constants, defined in <\fBunistd.h\fR>, are the corresponding values used for \fIname:\fR .sp .sp .TS tab() box; cw(2.14i) |cw(2.15i) |cw(1.21i) lw(2.14i) |lw(2.15i) |lw(1.21i) . VariableValue of \fIname\fRNotes _ {\fBACL_ENABLED\fR}\fB_PC_ACL_ENABLED\fR10 _ {\fBFILESIZEBITS\fR}\fB_PC_FILESIZEBITS\fR3,4 _ {\fBLINK_MAX\fR}\fB_PC_LINK_MAX\fR1 _ {\fBMAX_CANON\fR}\fB_PC_MAX_CANON\fR2 _ {\fBMAX_INPUT\fR}\fB_PC_MAX_INPUT\fR2 _ {\fBMIN_HOLE_SIZE\fR}\fB_PC_MIN_HOLE_SIZE\fR11 _ {\fBNAME_MAX\fR}\fB_PC_NAME_MAX\fR3, 4 _ {\fBPATH_MAX\fR}\fB_PC_PATH_MAX\fR4,5 _ {\fBPIPE_BUF\fR}\fB_PC_PIPE_BUF\fR6 _ {\fBPOSIX_ALLOC_SIZE_MIN\fR}\fB_PC_ALLOC_SIZE_MIN\fR _ {\fBPOSIX_REC_INCR_XFER_SIZE\fR}\fB_PC_REC_INCR_XFER_SIZE\fR _ {\fBPOSIX_REC_MAX_XFER_SIZE\fR}\fB_PC_REC_MAX_XFER_SIZE\fR _ {\fBPOSIX_REC_MIN_XFER_SIZE\fR}\fB_PC_REC_MIN_XFER_SIZE\fR _ {\fBPOSIX_REC_XFER_ALIGN\fR}\fB_PC_REC_XFER_ALIGN\fR _ {\fBSYMLINK_MAX\fR}\fB_PC_SYMLINK_MAX\fR4, 9 _ {\fBXATTR_ENABLED\fR}\fB_PC_XATTR_ENABLED\fR1 _ {\fBSATTR_ENABLED\fR}\fB_PC_SATTR_ENABLED\fR _ {\fBXATTR_EXISTS\fR}\fB_PC_XATTR_EXISTS\fR1 _ {\fBSATTR_EXISTS\fR}\fB_PC_SATTR_EXISTS\fR _ {\fBACCESS_FILTERING\fR}\fB_PC_ACCESS_FILTERING\fR12 _ \fB_POSIX_CHOWN_RESTRICTED\fR\fB_PC_CHOWN_RESTRICTED\fR7 _ \fB_POSIX_NO_TRUNC\fR\fB_PC_NO_TRUNC\fR3, 4 _ \fB_POSIX_VDISABLE\fR\fB_PC_VDISABLE\fR2 _ \fB_POSIX_ASYNC_IO\fR\fB_PC_ASYNC_IO\fR8 _ \fB_POSIX_PRIO_IO\fR\fB_PC_PRIO_IO\fR8 _ \fB_POSIX_SYNC_IO\fR\fB_PC_SYNC_IO\fR8 _ \fB_POSIX_TIMESTAMP_RESOLUTION\fR\fB_PC_TIMESTAMP_RESOLUTION\fR1 .TE .sp .LP \fBNotes:\fR .RS +4 .TP 1. If \fIpath\fR or \fIfildes\fR refers to a directory, the value returned applies to the directory itself. .RE .RS +4 .TP 2. If \fIpath\fR or \fIfildes\fR does not refer to a terminal file, it is unspecified whether an implementation supports an association of the variable name with the specified file. .RE .RS +4 .TP 3. If \fIpath\fR or \fIfildes\fR refers to a directory, the value returned applies to filenames within the directory. .RE .RS +4 .TP 4. If \fIpath\fR or \fIfildes\fR does not refer to a directory, it is unspecified whether an implementation supports an association of the variable name with the specified file. .RE .RS +4 .TP 5. If \fIpath\fR or \fIfildes\fR refers to a directory, the value returned is the maximum length of a relative pathname when the specified directory is the working directory. .RE .RS +4 .TP 6. If \fIpath\fR refers to a FIFO, or \fIfildes\fR refers to a pipe or FIFO, the value returned applies to the referenced object. If \fIpath\fR or \fIfildes\fR refers to a directory, the value returned applies to any FIFO that exists or can be created within the directory. If \fIpath\fR or \fIfildes\fR refers to any other type of file, it is unspecified whether an implementation supports an association of the variable name with the specified file. .RE .RS +4 .TP 7. If \fIpath\fR or \fIfildes\fR refers to a directory, the value returned applies to any files, other than directories, that exist or can be created within the directory. .RE .RS +4 .TP 8. If \fIpath\fR or \fIfildes\fR refers to a directory, it is unspecified whether an implementation supports an association of the variable name with the specified file. .RE .RS +4 .TP 9. If \fIpath\fR or \fIfildes\fR refers to a directory, the value returned is the maximum length of the string that a symbolic link in that directory can contain. .RE .RS +4 .TP 10. If \fIpath\fR or \fIfildes\fR refers to a file or directory in a file system that supports ACLs, the value returned is the bitwise inclusive OR of the following flags associated with ACL types supported by the file system; otherwise 0 is returned. .sp .ne 2 .mk .na \fB\fB_ACL_ACE_ENABLED\fR\fR .ad .RS 23n .rt The file system supports ACE ACLs. .RE .sp .ne 2 .mk .na \fB\fB_ACL_ACLENT_ENABLED\fR\fR .ad .RS 23n .rt The file system supports UFS aclent ACLs. .RE .RE .RS +4 .TP 11. If a filesystem supports the reporting of holes (see \fBlseek\fR(2), \fBpathconf()\fR and \fBfpathconf()\fR return a positive number that represents the minimum hole size returned in bytes. The offsets of holes returned will be aligned to this same value. A special value of 1 is returned if the filesystem does not specify the minimum hole size but still reports holes. .RE .RS +4 .TP 12. If \fIpath\fR or \fIfildes\fR refers to a directory and the file system in which the directory resides supports access filtering, a non-zero value is returned. Otherwise, 0 is returned. .RE .SH RETURN VALUES .sp .LP If \fIname\fR is an invalid value, both \fBpathconf()\fR and \fBfpathconf()\fR return \fB\(mi1\fR and \fBerrno\fR is set to indicate the error. .sp .LP If the variable corresponding to \fIname\fR has no limit for the \fIpath\fR or file descriptor, both \fBpathconf()\fR and \fBfpathconf()\fR return \fB\(mi1\fR without changing \fBerrno\fR. If \fBpathconf()\fR needs to use \fIpath\fR to determine the value of \fIname\fR and \fBpathconf()\fR does not support the association of \fIname\fR with the file specified by \fIpath\fR, or if the process did not have appropriate privileges to query the file specified by \fIpath\fR, or \fIpath\fR does not exist, \fBpathconf()\fR returns \fB\(mi1\fR and \fBerrno\fR is set to indicate the error. .sp .LP If \fBfpathconf()\fR needs to use \fIfildes\fR to determine the value of \fIname\fR and \fBfpathconf()\fR does not support the association of \fIname\fR with the file specified by \fIfildes\fR, or if \fIfildes\fR is an invalid file descriptor, \fBfpathconf()\fR returns \fB\(mi1\fR and \fBerrno\fR is set to indicate the error. .sp .LP Otherwise \fBpathconf()\fR or \fBfpathconf()\fR returns the current variable value for the file or directory without changing \fBerrno\fR. The value returned will not be more restrictive than the corresponding value available to the application when it was compiled with <\fBlimits.h\fR> or <\fBunistd.h\fR>. .SH ERRORS .sp .LP The \fBpathconf()\fR function will fail if: .sp .ne 2 .mk .na \fB\fBEINVAL\fR\fR .ad .RS 10n .rt The value of \fIname\fR is not valid. .RE .sp .ne 2 .mk .na \fB\fBELOOP\fR\fR .ad .RS 10n .rt A loop exists in symbolic links encountered during resolution of the \fIpath\fR argument. .RE .sp .LP The \fBfpathconf()\fR function will fail if: .sp .ne 2 .mk .na \fB\fBEINVAL\fR\fR .ad .RS 10n .rt The value of \fIname\fR is not valid. .RE .sp .LP The \fBpathconf()\fR function may 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. .RE .sp .ne 2 .mk .na \fB\fBEINVAL\fR\fR .ad .RS 16n .rt An association of the variable \fIname\fR with the specified file is not supported. .RE .sp .ne 2 .mk .na \fB\fBENAMETOOLONG\fR\fR .ad .RS 16n .rt The length of the \fIpath\fR argument exceeds {\fBPATH_MAX\fR} or a pathname component is longer than {\fBNAME_MAX\fR}. .RE .sp .ne 2 .mk .na \fB\fBENAMETOOLONG\fR\fR .ad .RS 16n .rt As a result of encountering a symbolic link in resolution of the \fIpath\fR argument, the length of the substituted pathname string exceeded {\fBPATH_MAX\fR}. .RE .sp .ne 2 .mk .na \fB\fBENOENT\fR\fR .ad .RS 16n .rt A component of \fIpath\fR does not name an existing file or \fIpath\fR is an empty string. .RE .sp .ne 2 .mk .na \fB\fBENOTDIR\fR\fR .ad .RS 16n .rt A component of the path prefix is not a directory. .RE .sp .LP The \fBfpathconf()\fR function may fail if: .sp .ne 2 .mk .na \fB\fBEBADF\fR\fR .ad .RS 10n .rt The \fIfildes\fR argument is not a valid file descriptor. .RE .sp .ne 2 .mk .na \fB\fBEINVAL\fR\fR .ad .RS 10n .rt An association of the variable \fIname\fR with the specified file is not supported. .RE .SH USAGE .sp .LP The {\fBSYMLINK_MAX\fR} variable applies only to the \fBfpathconf()\fR function. .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-LevelAsync-Signal-Safe _ StandardSee \fBstandards\fR(5). .TE .SH SEE ALSO .sp .LP \fBlseek\fR(2), \fBconfstr\fR(3C), \fBlimits.h\fR(3HEAD), \fBsysconf\fR(3C), \fBattributes\fR(5), \fBstandards\fR(5)