login: use getdtablesize() correctly in login.c

getdtablesize() is the number of descriptors and since decriptors start
at 0, its value isnt the largest descriptors possible.  One should use
getdtablesize() - 1 instead.

Signed-off-by: Chas Williams - CONTRACTOR <chas@cmf.nrl.navy.mil>

diff --git a/login-utils/login.c b/login-utils/login.c
index bb977e5d9eb21688d4e2874e853bcc2f22fa6502..e2c0f8015c6e0d4e5974fdb4defe536a7403cb89 100644 (file)
--- a/login-utils/login.c
+++ b/login-utils/login.c
@@ -1290,7 +1290,7 @@ int main(int argc, char **argv)
                        *p++ = ' ';
        }
 
-       for (cnt = getdtablesize(); cnt > 2; cnt--)
+       for (cnt = (getdtablesize() - 1); cnt > 2; cnt--)
                close(cnt);
 
        setpgrp();       /* set pgid to pid this means that setsid() will fail */