stat: be robust to PATH_MAX definition

[gnulib.git] / lib / stat.c

diff --git a/lib/stat.c b/lib/stat.c
index cbc9100..f07370d 100644 (file)
--- a/lib/stat.c
+++ b/lib/stat.c
@@ -38,6 +38,7 @@ orig_stat (const char *filename, struct stat *buf)
 #include <stdbool.h>
 #include <string.h>
 #include "dosname.h"
+#include "verify.h"
 
 /* Store information about NAME into ST.  Work around bugs with
    trailing slashes.  Mingw has other bugs (such as st_ino always
@@ -63,6 +64,12 @@ rpl_stat (char const *name, struct stat *st)
     }
 #endif /* REPLACE_FUNC_STAT_FILE */
 #if REPLACE_FUNC_STAT_DIR
+  /* The only known systems where REPLACE_FUNC_STAT_DIR is needed also
+     have a constant PATH_MAX.  */
+# ifndef PATH_MAX
+#  error "Please port this replacement to your platform"
+# endif
+
   if (result == -1 && errno == ENOENT)
     {
       /* Due to mingw's oddities, there are some directories (like
@@ -77,6 +84,7 @@ rpl_stat (char const *name, struct stat *st)
       char fixed_name[PATH_MAX + 1] = {0};
       size_t len = strlen (name);
       bool check_dir = false;
+      verify (PATH_MAX <= 4096);
       if (PATH_MAX <= len)
         errno = ENAMETOOLONG;
       else if (len)