diff options
Diffstat (limited to 'rfuncs.h')
| -rw-r--r-- | rfuncs.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/rfuncs.h b/rfuncs.h new file mode 100644 index 000000000000..22d329311d9f --- /dev/null +++ b/rfuncs.h @@ -0,0 +1,79 @@ +/* + * 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 */ |