.\" $NetBSD: stat_flags.3,v 1.8.40.1 2024/07/20 15:38:24 martin Exp $ .\" .\" Copyright (c) 1996 The NetBSD Foundation, Inc. .\" All rights reserved. .\" .\" This code is derived from software contributed to The NetBSD Foundation .\" by Christos Zoulas. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS .\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED .\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR .\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS .\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR .\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF .\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS .\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN .\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE .\" POSSIBILITY OF SUCH DAMAGE. .\" .Dd May 31, 2023 .Dt STAT_FLAGS 3 .Os .Sh NAME .Nm string_to_flags , .Nm flags_to_string .Nd Stat flags parsing and printing functions .Sh LIBRARY .Lb libutil .Sh SYNOPSIS .In util.h .Ft char * .Fn flags_to_string "u_long flags" "const char *def" .Ft int .Fn string_to_flags "char **stringp" "u_long *setp" "u_long *clrp" .Sh DESCRIPTION The .Fn flags_to_string and .Fn string_to_flags functions are used by programs such as .Xr chflags 1 , .Xr ls 1 , .Xr makefs 8 , .Xr mtree 8 , etc., to parse and/or print the .Fa st_flags field in the .Xr stat 2 structure. . .Pp They recognize the following flags: . .Bl -tag -width Cm -offset indent . .It Cm arch , Cm archived Pq Dv SF_ARCHIVED file is archived .Po legacy/compat flag for .Xr mount_msdos 8 filesystems .Pc . .It Cm nodump Pq Dv UF_NODUMP do not .Xr dump 8 file . .It Cm opaque Pq Dv UF_OPAQUE directory is opaque in .Xr mount_union 8 filesystems . .It Cm sappnd , Cm sappend Pq Dv SF_APPEND writes to the file may only append .Pq flag can be changed by the superuser only . .It Cm schg , Cm schange , Cm simmutable Pq Dv SF_IMMUTABLE file cannot be changed; it is immutable .Pq flag can be changed by the superuser only . .It Cm snap Pq Dv SF_SNAPSHOT file is an .Xr fss 4 snapshot inode . .It Cm uappnd , Cm uappend Pq Dv UF_APPEND writes to the file may only append . .It Cm uchg , Cm uchange , Cm uimmutable Pq Dv UF_IMMUTABLE file cannot be changed; it is immutable . .El . .Pp The .Fn flags_to_string function converts the bits set in the .Fa flags argument to a comma-separated string and returns it. If no flags are set, then the .Fa def string is returned. The returned string is allocated via .Xr malloc 3 and it is the responsibility of the caller to .Xr free 3 it. .Pp Where the above list has several flag names for a flag, the first of the listed names is returned. . .Pp The .Fn string_to_flags function takes a .Fa stringp of space, comma, or tab separated flag names and places their bit value on the .Fa setp argument. .Pp If the flag name is prefixed by .Ql no , then the bit value is placed on the .Fa clrp argument. Both .Cm nonodump and .Cm dump are recognized as negative forms of the .Cm nodump flag name. .Pp Where the above list has several flag names for a flag, all of them are recognized. The .Cm snap flag name is .Em not recognized .Pq as its flag cannot be changed anyway . . .Sh RETURN VALUES .Fn flags_to_string returns the symbolic representation of flags, the default string, or .Dv NULL if allocation failed. . .Pp .Fn string_to_flags returns .Dv 0 on success and .Dv 1 if it fails to parse the string, setting .Fa stringp to point to the first name that it failed to parse. .Sh SEE ALSO .Xr chflags 2 , .Xr stat 2