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-rw-r--r--libgcompat/gnulib.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/libgcompat/gnulib.c b/libgcompat/gnulib.c
index e0ee953..ccdec24 100644
--- a/libgcompat/gnulib.c
+++ b/libgcompat/gnulib.c
@@ -1,8 +1,16 @@
-#include <assert.h>
#include <sys/select.h>
+#include "internal.h"
+
+#define REASON_FD_SET_OVERFLOW \
+ "Fault: Overflow in fd_set detected.\n" \
+ "Description: This is caused by a programmer naively attempting to redefine FD_SETSIZE,\n" \
+ " which is not allowed on POSIX platforms. The program must be either rebuilt\n" \
+ " with the correct FD_SETSIZE definition, or preferably rewritten to avoid use\n" \
+ " of select(2) in general. See also: poll(2).\n" \
+ " libgcompat believes FD_SETSIZE to be %zu.\n"
unsigned long __fdelt_chk(unsigned long size)
{
- assert(size < FD_SETSIZE);
+ GCOMPAT__assert_with_reason(size < FD_SETSIZE, REASON_FD_SET_OVERFLOW, FD_SETSIZE);
return size / (sizeof(unsigned long) << 3);
}