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| author | Ken Brown <kbrown@cornell.edu> | 2021-01-27 20:06:22 -0500 |
|---|---|---|
| committer | Ken Brown <kbrown@cornell.edu> | 2021-02-01 09:55:07 -0500 |
| commit | 3d256e22e22d435d13cfecf39c15338cfbd6f587 (patch) | |
| tree | 6b485c62fcaa8d60148de9ffbdb47466328de7ee | |
| parent | 6c1552b0da7c7cdf1cf1668b3706c0d1a14c9b2d (diff) | |
| download | cygnal-3d256e22e22d435d13cfecf39c15338cfbd6f587.tar.gz cygnal-3d256e22e22d435d13cfecf39c15338cfbd6f587.tar.bz2 cygnal-3d256e22e22d435d13cfecf39c15338cfbd6f587.zip | |
Cygwin: getdtablesize: always return OPEN_MAX_MAX
According to the Linux man page for getdtablesize(3), the latter is
supposed to return "the maximum number of files a process can have
open, one more than the largest possible value for a file descriptor."
The constant OPEN_MAX_MAX is the only limit enforced by Cygwin, so we
now return that.
Previously getdtablesize returned the current size of cygheap->fdtab,
Cygwin's internal file descriptor table. But this is a dynamically
growing table, and its current size does not reflect an actual limit
on the number of open files.
With this change, gnulib now reports that getdtablesize and
fcntl(F_DUPFD) work on Cygwin. Packages like GNU tar that use the
corresponding gnulib modules will no longer use gnulib replacements on
Cygwin.
| -rw-r--r-- | winsup/cygwin/syscalls.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc index 82ddad46d..d293ff2c0 100644 --- a/winsup/cygwin/syscalls.cc +++ b/winsup/cygwin/syscalls.cc @@ -2887,7 +2887,7 @@ setdtablesize (int size) extern "C" int getdtablesize () { - return cygheap->fdtab.size; + return OPEN_MAX_MAX; } extern "C" int |