sulogin: Use read instead of allocated size from getline()

The getline function distinguishes between the allocated and read
lenghts, and we should not mix them up, as we might end up processing
junk.

Signed-off-by: Guillem Jover <guillem@hadrons.org>

diff --git a/login-utils/sulogin-consoles.c b/login-utils/sulogin-consoles.c
index 9fd10340562410a5d1e09d58738d33e1007dfe25..39d24d293f987788aa6b52a8eb5df195d257e355 100644 (file)
--- a/login-utils/sulogin-consoles.c
+++ b/login-utils/sulogin-consoles.c
@@ -154,13 +154,15 @@ char *oneline(const char *file)
 {
        FILE *fp;
        char *ret = NULL;
-       size_t len = 0;
+       size_t dummy = 0;
+       ssize_t len;
 
        DBG(dbgprint("reading %s", file));
 
        if (!(fp = fopen(file, "re")))
                return NULL;
-       if (getline(&ret, &len, fp) >= 0) {
+       len = getline(&ret, &dummy, fp);
+       if (len >= 0) {
                char *nl;
 
                if (len)