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Diffstat (limited to 'sysdeps/unix/getlogin_r.c')
-rw-r--r--sysdeps/unix/getlogin_r.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/sysdeps/unix/getlogin_r.c b/sysdeps/unix/getlogin_r.c
index f80b2c7518..aa2c0617e6 100644
--- a/sysdeps/unix/getlogin_r.c
+++ b/sysdeps/unix/getlogin_r.c
@@ -72,8 +72,18 @@ getlogin_r (name, name_len)
}
else
{
- strncpy (name, ut->ut_line, name_len);
- result = 0;
+ size_t needed = strlen (ut->ut_line) + 1;
+
+ if (needed < name_len)
+ {
+ __set_errno (ERANGE);
+ result = ERANGE;
+ }
+ else
+ {
+ memcpy (name, ut->ut_line, needed);
+ result = 0;
+ }
}
endutent_r (&utmp_data);