STAT_FLAGS(3) Library Functions Manual STAT_FLAGS(3)
NAME
string_to_flags, flags_to_stringStat flags parsing and printing functions
LIBRARY
System Utilities Library (libutil, -lutil)
SYNOPSIS
#include <util.h>
char *
flags_to_string(u_long flags, const char *def);
int
string_to_flags(char **stringp, u_long *setp, u_long clrp);
DESCRIPTION
The flags_to_string() and string_to_flags() functions are used by programs such as ls(1), mtree(8), makefs(8), etc., to parse and/or print the st_flags field in the stat(2) structure.
 
They recognize the following flags:
String
Flag
Description
arch
SF_ARCHIVED
file is archived
nodump
UF_NODUMP
do not dump file
opaque
UF_OPAQUE
directory is opaque in union filesystems
sappnd
SF_APPEND
writes to the file may only append
schg
SF_IMMUTABLE
file cannot be changed; it is immutable
snap
SF_SNAPSHOT
file is a snapshot inode
uappnd
UF_APPEND
writes to the file may only append
uchg
UF_IMMUTABLE
file cannot be changed; it is immutable
 
The SF_APPEND and SF_IMMUTABLE flags are for the superuser only, whereas UF_APPEND and UF_IMMUTABLE are for the user only.
 
The flags_to_string() function converts the bits set in the flags argument to a comma-separated string and returns it. If no flags are set, then the def string is returned. The returned string is allocated via malloc(3) and it is the responsibility of the caller to free(3) it.
 
The string_to_flags() function takes a stringp of space, comma, or tab separated flag names and places their bit value on the setp argument. If the flag name is prefixed by: “no”, then the bit value is placed on the clrp argument.
RETURN VALUES
flags_to_string() returns the symbolic representation of flags, the default string, or NULL if allocation failed.
 
string_to_flags() returns 0 on success and 1 if it fails to parse the string, setting stringp to point to the first string that it failed to parse.
SEE ALSO