diff options
| author | Pádraig Brady <P@draigBrady.com> | 2023-03-06 13:01:26 +0000 |
|---|---|---|
| committer | Pádraig Brady <P@draigBrady.com> | 2023-03-06 13:04:40 +0000 |
| commit | e30af1e5840fdcabe3856f9ffcd6354b94d0a7ee (patch) | |
| tree | 22313fe003398ec1ecaa0f3472f3c74d90937435 | |
| parent | 110bcd28386b1f47a4cd876098acb708fdcbbb25 (diff) | |
| download | coreutils-e30af1e5840fdcabe3856f9ffcd6354b94d0a7ee.tar.gz | |
tail,tee: avoid issues with many files on systems without poll
* src/iopoll.c (iopoll): Protect the call to select against
passing in a descriptor larger than FD_SETSIZE.
| -rw-r--r-- | src/iopoll.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/iopoll.c b/src/iopoll.c index a73ce05bf..ca27595e3 100644 --- a/src/iopoll.c +++ b/src/iopoll.c @@ -86,6 +86,12 @@ iopoll (int fdin, int fdout, bool block) int nfds = (fdin > fdout ? fdin : fdout) + 1; int ret = 0; + if (FD_SETSIZE < nfds) + { + errno = EINVAL; + ret = -1; + } + /* If fdout has an error condition (like a broken pipe) it will be seen as ready for reading. Assumes fdout is not actually readable. */ while (0 <= ret || errno == EINTR) |