add get_arg_max(). Use sysconf() if ARG_MAX is not defined.

1 files changed, 13 insertions, 1 deletions

diff --git a/openbsd-compat/glob.c b/openbsd-compat/glob.c
index 3c3a19131..5ed286211 100644
--- a/openbsd-compat/glob.c
+++ b/openbsd-compat/glob.c
@@ -37,6 +37,18 @@
 #include "includes.h"
 #include <ctype.h>
 
+long
+get_arg_max()
+{
+#ifdef ARG_MAX
+        return(ARG_MAX);
+#elif defined(HAVE_SYSCONF) && defined(_SC_ARG_MAX)
+        return(sysconf(_SC_ARG_MAX));
+#else
+        return(256); /* XXX: arbitrary */
+#endif
+}
+
 #if !defined(HAVE_GLOB) || !defined(GLOB_HAS_ALTDIRFUNC) || \
     !defined(GLOB_HAS_GL_MATCHC)
 
@@ -689,7 +701,7 @@ globextend(path, pglob, limitp)
         pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
 
         if ((pglob->gl_flags & GLOB_LIMIT) &&
-            newsize + *limitp >= ARG_MAX) {
+            newsize + *limitp >= (u_int) get_arg_max()) {
                 errno = 0;
                 return(GLOB_NOSPACE);
         }