/*
* Copyright 2016 Chris Torek <chris.torek@gmail.com>
* All rights reserved
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted providing 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 AUTHOR ``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 AUTHOR 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.
*
*/
#ifndef LIB9P_RFUNCS_H
#define LIB9P_RFUNCS_H
#include <grp.h>
#include <pwd.h>
#include <string.h>
#if defined(WITH_CASPER)
#include <libcasper.h>
#endif
/*
* Reentrant, optionally-malloc-ing versions of
* basename() and dirname().
*/
char *r_basename(const char *, char *, size_t);
char *r_dirname(const char *, char *, size_t);
/*
* Yuck: getpwuid, getgrgid are not thread-safe, and the
* POSIX replacements (getpwuid_r, getgrgid_r) are horrible.
* This is to allow us to loop over the get.*_r calls with ever
* increasing buffers until they succeed or get unreasonable
* (same idea as the libc code for the non-reentrant versions,
* although prettier).
*
* The getpwuid/getgrgid functions auto-init one of these,
* but the caller must call r_pgfree() when done with the
* return values.
*
* If we need more later, we may have to expose the init function.
*/
struct r_pgdata {
char *r_pgbuf;
size_t r_pgbufsize;
union {
struct passwd un_pw;
struct group un_gr;
} r_pgun;
};
/* void r_pginit(struct r_pgdata *); */
void r_pgfree(struct r_pgdata *);
struct passwd *r_getpwuid(uid_t, struct r_pgdata *);
struct group *r_getgrgid(gid_t, struct r_pgdata *);
#if defined(WITH_CASPER)
struct passwd *r_cap_getpwuid(cap_channel_t *, uid_t, struct r_pgdata *);
struct group *r_cap_getgrgid(cap_channel_t *, gid_t, struct r_pgdata *);
#endif
#endif /* LIB9P_RFUNCS_H */
