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-rw-r--r--m4/macros/func_bad_hasmntopt.m459
1 files changed, 59 insertions, 0 deletions
diff --git a/m4/macros/func_bad_hasmntopt.m4 b/m4/macros/func_bad_hasmntopt.m4
new file mode 100644
index 000000000000..d458bd30c4c0
--- /dev/null
+++ b/m4/macros/func_bad_hasmntopt.m4
@@ -0,0 +1,59 @@
+dnl ######################################################################
+dnl Check if we have as buggy hasmntopt() libc function
+AC_DEFUN([AMU_FUNC_BAD_HASMNTOPT],
+[
+AC_CACHE_CHECK([for working hasmntopt], ac_cv_func_hasmntopt_working,
+[AC_TRY_RUN(
+AMU_MOUNT_HEADERS(
+[[
+#ifdef HAVE_MNTENT_H
+/* some systems need <stdio.h> before <mntent.h> is included */
+# ifdef HAVE_STDIO_H
+# include <stdio.h>
+# endif /* HAVE_STDIO_H */
+# include <mntent.h>
+#endif /* HAVE_MNTENT_H */
+#ifdef HAVE_SYS_MNTENT_H
+# include <sys/mntent.h>
+#endif /* HAVE_SYS_MNTENT_H */
+#ifdef HAVE_SYS_MNTTAB_H
+# include <sys/mnttab.h>
+#endif /* HAVE_SYS_MNTTAB_H */
+#if defined(HAVE_MNTTAB_H) && !defined(MNTTAB)
+# include <mnttab.h>
+#endif /* defined(HAVE_MNTTAB_H) && !defined(MNTTAB) */
+#ifdef HAVE_STRUCT_MNTENT
+typedef struct mntent mntent_t;
+#else /* not HAVE_STRUCT_MNTENT */
+# ifdef HAVE_STRUCT_MNTTAB
+typedef struct mnttab mntent_t;
+/* map struct mnttab field names to struct mntent field names */
+# define mnt_opts mnt_mntopts
+# endif /* not HAVE_STRUCT_MNTTAB */
+#endif /* not HAVE_STRUCT_MNTENT */
+
+int main()
+{
+ mntent_t mnt;
+ char *tmp = NULL;
+
+ /*
+ * Test if hasmntopt will incorrectly find the string "soft", which
+ * is part of the large "softlookup" function.
+ */
+ mnt.mnt_opts = "hard,softlookup,ro";
+
+ if ((tmp = hasmntopt(&mnt, "soft")))
+ exit(1);
+ exit(0);
+}
+]]),
+ [ac_cv_func_hasmntopt_working=yes],
+ [ac_cv_func_hasmntopt_working=no]
+)])
+if test $ac_cv_func_hasmntopt_working = no
+then
+ AC_LIBOBJ([hasmntopt])
+ AC_DEFINE(HAVE_BAD_HASMNTOPT)
+fi
+])