diff options
Diffstat (limited to 'util-src/pposix.c')
| -rw-r--r-- | util-src/pposix.c | 35 |
1 files changed, 25 insertions, 10 deletions
diff --git a/util-src/pposix.c b/util-src/pposix.c index 7dd8708b..191e276e 100644 --- a/util-src/pposix.c +++ b/util-src/pposix.c @@ -662,23 +662,38 @@ int lc_fallocate(lua_State* L) len = luaL_checkinteger(L, 3); #if defined(_GNU_SOURCE) - if(fallocate(fileno(f), FALLOC_FL_KEEP_SIZE, offset, len) != 0) -#elif _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L -#warning Using posix_fallocate() fallback. Linux fallocate() is strongly recommended if available: recompile with -D_GNU_SOURCE - if(posix_fallocate(fileno(f), offset, len) != 0) + if(fallocate(fileno(f), FALLOC_FL_KEEP_SIZE, offset, len) == 0) + { + lua_pushboolean(L, 1); + return 1; + } + + if(errno != ENOSYS && errno != EOPNOTSUPP) + { + lua_pushnil(L); + lua_pushstring(L, strerror(errno)); + return 2; + } +#else +#warning Only using posix_fallocate() fallback. +#warning Linux fallocate() is strongly recommended if available: recompile with -D_GNU_SOURCE +#warning Note that posix_fallocate() will still be used on filesystems that dont support fallocate() #endif + + if(posix_fallocate(fileno(f), offset, len) == 0) { -#if ! defined(_GNU_SOURCE) + lua_pushboolean(L, 1); + return 1; + } + else + { + lua_pushnil(L); + lua_pushstring(L, strerror(errno)); /* posix_fallocate() can leave a bunch of NULs at the end, so we cut that * this assumes that offset == length of the file */ ftruncate(fileno(f), offset); -#endif - lua_pushnil(L); - lua_pushstring(L, strerror(errno)); return 2; } - lua_pushboolean(L, 1); - return 1; } #endif |