strperm.3

Introduction to Library Functions                      STRPERM(3)

NAME
     strperm - evaluate file permission expression

SYNOPSIS
     int strperm(char* s, char** e, int p)

DESCRIPTION
     strperm applies a file permission  expression  in  the  nul-
     terminated  string  s to the initial file permission mask p.
     The new permission mask is returned.  If e not 0 then *e  is
     set to point to the first unrecognized character in s.

     A tape device specification is composed of one or more  who-
     op-permission terms separated by ,.  who selects portions of
     the permission bits and may be any combination of:

     u  the user permission bits;

     g  the group permission bits;

     o  the `other' permission bits;

     a  all permission bits.

     If omitted, all permission bits are selected.  op  specifies
     how the original permission p is to be modified:

     +
        | the new bits are set in p;

     -  the new bits are cleared in p;

     &  the new bits are and'd with p;

     =  the select bits in p are set equal to the new bits

     A permission expression term may also be  an  octal  number.
     Octal  specifications are inherently non-portable.  Refer to
     chmod(1) for an explanation of this form.

SEE ALSO
     chmod(1), ls(1), strmode(3)

SunOS 5.10                Last change:                          1

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