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* fcntl.cc (fcntl64): Detect negative fd as error.

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This commit is contained in:
Christopher Faylor
2009-08-21 21:19:45 +00:00
parent 24149e4aa9
commit e41f43a1a6
2 changed files with 11 additions and 1 deletions
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8
winsup/cygwin/fcntl.cc
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@ -40,7 +40,13 @@ fcntl64 (int fd, int cmd, ...)
switch (cmd)
{
case F_DUPFD:
res = dup2 (fd, cygheap_fdnew (((int) arg) - 1));
if ((int) arg >= 0)
res = dup2 (fd, cygheap_fdnew (((int) arg) - 1));
else
{
set_errno (EINVAL);
res = -1;
}
break;
case F_GETLK:
case F_SETLK: