80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
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/*
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* Copyright 2016 Chris Torek <chris.torek@gmail.com>
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* All rights reserved
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted providing that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef LIB9P_RFUNCS_H
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#define LIB9P_RFUNCS_H
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#include <grp.h>
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#include <pwd.h>
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#include <string.h>
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#if defined(WITH_CASPER)
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#include <libcasper.h>
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#endif
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/*
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* Reentrant, optionally-malloc-ing versions of
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* basename() and dirname().
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*/
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char *r_basename(const char *, char *, size_t);
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char *r_dirname(const char *, char *, size_t);
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/*
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* Yuck: getpwuid, getgrgid are not thread-safe, and the
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* POSIX replacements (getpwuid_r, getgrgid_r) are horrible.
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* This is to allow us to loop over the get.*_r calls with ever
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* increasing buffers until they succeed or get unreasonable
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* (same idea as the libc code for the non-reentrant versions,
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* although prettier).
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*
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* The getpwuid/getgrgid functions auto-init one of these,
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* but the caller must call r_pgfree() when done with the
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* return values.
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*
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* If we need more later, we may have to expose the init function.
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*/
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struct r_pgdata {
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char *r_pgbuf;
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size_t r_pgbufsize;
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union {
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struct passwd un_pw;
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struct group un_gr;
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} r_pgun;
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};
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/* void r_pginit(struct r_pgdata *); */
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void r_pgfree(struct r_pgdata *);
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struct passwd *r_getpwuid(uid_t, struct r_pgdata *);
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struct group *r_getgrgid(gid_t, struct r_pgdata *);
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#if defined(WITH_CASPER)
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struct passwd *r_cap_getpwuid(cap_channel_t *, uid_t, struct r_pgdata *);
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struct group *r_cap_getgrgid(cap_channel_t *, gid_t, struct r_pgdata *);
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#endif
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#endif /* LIB9P_RFUNCS_H */
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