00001 /*
00002     Check _POSIX_SYNCHRONIZED_IO and _POSIX_ASYNCHRONOUS_IO
00003     AUP2, Sec. 1.05.4, 2.16.2
00004 
00005     Copyright 2003 by Marc J. Rochkind. All rights reserved.
00006     May be copied only for purposes and under conditions described
00007     on the Web page www.basepath.com/aup/copyright.htm.
00008 
00009     The Example Files are provided "as is," without any warranty;
00010     without even the implied warranty of merchantability or fitness
00011     for a particular purpose. The author and his publisher are not
00012     responsible for any damages, direct or incidental, resulting
00013     from the use or non-use of these Example Files.
00014 
00015     The Example Files may contain defects, and some contain deliberate
00016     coding mistakes that were included for educational reasons.
00017     You are responsible for determining if and how the Example Files
00018     are to be used.
00019 
00020 */
00021 #include "defs.h"
00022 
00023 /*[option_sync_io]*/
00024 OPT_RETURN option_sync_io(const char *path)
00025 {
00026 #if _POSIX_SYNCHRONIZED_IO <= 0
00027     return OPT_NO;
00028 #elif _XOPEN_VERSION >= 500 && !defined(LINUX)
00029     #if !defined(_POSIX_SYNC_IO)
00030         errno = 0;
00031         if (pathconf(path, _PC_SYNC_IO) == -1)
00032             if (errno == 0)
00033                 return OPT_NO;
00034             else
00035                 EC_FAIL
00036         else
00037             return OPT_YES;
00038 
00039     EC_CLEANUP_BGN
00040         return OPT_ERROR;
00041     EC_CLEANUP_END
00042     #elif _POSIX_SYNC_IO == -1
00043         return OPT_NO;
00044     #else
00045         return OPT_YES;
00046     #endif /* _POSIX_SYNC_IO */
00047 #elif _POSIX_VERSION >= 199309L
00048     return OPT_YES;
00049 #else
00050     errno = EINVAL;
00051     return OPT_ERROR;
00052 #endif /* _POSIX_SYNCHRONIZED_IO */
00053 }
00054 /*[option_async_io]*/
00055 OPT_RETURN option_async_io(const char *path)
00056 {
00057 #if _POSIX_ASYNCHRONOUS_IO <= 0
00058     return OPT_NO;
00059 #elif _XOPEN_VERSION >= 500 && !defined(LINUX)
00060     #if !defined(_POSIX_ASYNC_IO)
00061         errno = 0;
00062         if (pathconf(path, _PC_ASYNC_IO) == -1)
00063             if (errno == 0)
00064                 return OPT_NO;
00065             else
00066                 EC_FAIL
00067         else
00068             return OPT_YES;
00069 
00070     EC_CLEANUP_BGN
00071         return OPT_ERROR;
00072     EC_CLEANUP_END
00073     #elif _POSIX_ASYNC_IO == -1
00074         return OPT_NO;
00075     #else
00076         return OPT_YES;
00077     #endif /* _POSIX_ASYNC_IO */
00078 #elif _POSIX_VERSION >= 199309L
00079     return OPT_YES;
00080 #else
00081     errno = EINVAL;
00082     return OPT_ERROR;
00083 #endif /* _POSIX_ASYNCHRONOUS_IO */
00084 }
00085 /*[]*/
common/options.c
