| /* System call limits | |
| Copyright 2018-2023 Free Software Foundation, Inc. | |
| This file is free software: you can redistribute it and/or modify | |
| it under the terms of the GNU Lesser General Public License as | |
| published by the Free Software Foundation; either version 2.1 of the | |
| License, or (at your option) any later version. | |
| This file is distributed in the hope that it will be useful, | |
| but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| GNU Lesser General Public License for more details. | |
| You should have received a copy of the GNU Lesser General Public License | |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ | |
| /* Maximum number of bytes to read or write in a single system call. | |
| This can be useful for system calls like sendfile on GNU/Linux, | |
| which do not handle more than MAX_RW_COUNT bytes correctly. | |
| The Linux kernel MAX_RW_COUNT is at least INT_MAX >> 20 << 20, | |
| where the 20 comes from the Hexagon port with 1 MiB pages; use that | |
| as an approximation, as the exact value may not be available to us. | |
| Using this also works around a serious Linux bug before 2.6.16; see | |
| <https://bugzilla.redhat.com/show_bug.cgi?id=612839>. | |
| Using this also works around a Tru64 5.1 bug, where attempting | |
| to read INT_MAX bytes fails with errno == EINVAL. See | |
| <https://lists.gnu.org/r/bug-gnu-utils/2002-04/msg00010.html>. | |
| Using this is likely to work around similar bugs in other operating | |
| systems. */ | |
| enum { SYS_BUFSIZE_MAX = INT_MAX >> 20 << 20 }; | |