fflagstostr(3) [mojave man page]

STRTOFFLAGS(3)						   BSD Library Functions Manual 					    STRTOFFLAGS(3)

NAME

     fflagstostr, strtofflags -- convert between file flag bits and their string names

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <unistd.h>

     char *
     fflagstostr(unsigned long flags);

     int
     strtofflags(char **stringp, unsigned long *setp, unsigned long *clrp);

DESCRIPTION

     The fflagstostr() function returns a comma separated string of the file flags represented by flags.  If no flags are set a zero length string
     is returned.

     If memory cannot be allocated for the return value, fflagstostr() returns NULL.

     The value returned from fflagstostr() is obtained from malloc() and should be returned to the system with free() when the program is done
     with it.

     The strtofflags() function takes a string of file flags, as described in chflags(1), parses it, and returns the 'set' flags and 'clear' flags
     such as would be given as arguments to chflags(2).  On success strtofflags() returns 0, otherwise it returns non-zero and stringp is left
     pointing to the offending token.

ERRORS

     The fflagstostr() function may fail and set errno for any of the errors specified for the library routine malloc(3).

SEE ALSO

     chflags(1), chflags(2), malloc(3)

HISTORY

     The fflagstostr() and strtofflags() functions first appeared in FreeBSD 4.0.

BSD
								  January 1, 2000							       BSD

STAT_FLAGS(3)						   BSD Library Functions Manual 					     STAT_FLAGS(3)

NAME

     string_to_flags, flags_to_string -- Stat 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

     chflags(2), stat(2)

BSD
								  August 6, 2011							       BSD