.\"	$NetBSD: krb5_acl_match_file.3,v 1.2 2017/01/28 21:31:49 christos Exp $
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.Dd May 12, 2006
.Dt KRB5_ACL_MATCH_FILE 3
.Os
.Sh NAME
.Nm krb5_acl_match_file ,
.Nm krb5_acl_match_string
.Nd ACL matching functions
.Sh LIBRARY
Kerberos 5 Library (libkrb5, -lkrb5)
.Sh SYNOPSIS
.Ft krb5_error_code
.Fo krb5_acl_match_file
.Fa "krb5_context context"
.Fa "const char *file"
.Fa "const char *format"
.Fa "..."
.Fc
.Ft krb5_error_code
.Fo krb5_acl_match_string
.Fa "krb5_context context"
.Fa "const char *string"
.Fa "const char *format"
.Fa "..."
.Fc
.Sh DESCRIPTION
.Nm krb5_acl_match_file
matches ACL format against each line in a file.
Lines starting with # are treated like comments and ignored.
.Pp
.Nm krb5_acl_match_string
matches ACL format against a string.
.Pp
The ACL format has three format specifiers: s, f, and r.
Each specifier will retrieve one argument from the variable arguments
for either matching or storing data.
The input string is split up using " " and "\et" as a delimiter; multiple
" " and "\et" in a row are considered to be the same.
.Pp
.Bl -tag -width "fXX" -offset indent
.It s
Matches a string using
.Xr strcmp 3
(case sensitive).
.It f
Matches the string with
.Xr fnmatch 3 .
The
.Fa flags
argument (the last argument) passed to the fnmatch function is 0.
.It r
Returns a copy of the string in the char ** passed in; the copy must be
freed with
.Xr free 3 .
There is no need to
.Xr free 3
the string on error: the function will clean up and set the pointer to
.Dv NULL .
.El
.Pp
All unknown format specifiers cause an error.
.Sh EXAMPLES
.Bd -literal -offset indent
char *s;

ret = krb5_acl_match_string(context, "foo", "s", "foo");
if (ret)
    krb5_errx(context, 1, "acl didn't match");
ret = krb5_acl_match_string(context, "foo foo baz/kaka",
    "ss", "foo", &s, "foo/*");
if (ret) {
    /* no need to free(s) on error */
    assert(s == NULL);
    krb5_errx(context, 1, "acl didn't match");
}
free(s);
.Ed
.Sh SEE ALSO
.Xr krb5 3