1 files changed, 101 insertions, 0 deletions
diff --git a/src/util/warn_stat.c b/src/util/warn_stat.c
new file mode 100644
index 0000000..fd885d9
--- /dev/null
+++ b/src/util/warn_stat.c
@@ -0,0 +1,101 @@
+/*++
+/* NAME
+/*	warn_stat 3
+/* SUMMARY
+/*	baby-sit stat() error returns
+/* SYNOPSIS
+/*	#include <warn_stat.h>
+/*
+/*	int     warn_stat(path, st)
+/*	const char *path;
+/*	struct stat *st;
+/*
+/*	int     warn_lstat(path, st)
+/*	const char *path;
+/*	struct stat *st;
+/*
+/*	int     warn_fstat(fd, st)
+/*	int     fd;
+/*	struct stat *st;
+/* DESCRIPTION
+/*	warn_stat(), warn_fstat() and warn_lstat() wrap the stat(),
+/*	fstat() and lstat() system calls with code that logs a
+/*	diagnosis for common error cases.
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/*	Wietse Venema
+/*	IBM T.J. Watson Research
+/*	P.O. Box 704
+/*	Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#define WARN_STAT_INTERNAL
+#include <warn_stat.h>
+
+/* diagnose_stat - log stat warning */
+
+static void diagnose_stat(void)
+{
+    struct stat st;
+
+    /*
+     * When *stat() fails with EOVERFLOW, and the interface uses 32-bit data
+     * types, suggest that the program be recompiled with larger data types.
+     */
+#ifdef EOVERFLOW
+    if (errno == EOVERFLOW && sizeof(st.st_size) == 4) {
+	msg_warn("this program was built for 32-bit file handles, "
+		 "but some number does not fit in 32 bits");
+	msg_warn("possible solution: recompile in 64-bit mode, or "
+		 "recompile in 32-bit mode with 'large file' support");
+    }
+#endif
+}
+
+/* warn_stat - stat with warning */
+
+int     warn_stat(const char *path, struct stat * st)
+{
+    int     ret;
+
+    ret = stat(path, st);
+    if (ret < 0)
+	diagnose_stat();
+    return (ret);
+}
+
+/* warn_lstat - lstat with warning */
+
+int     warn_lstat(const char *path, struct stat * st)
+{
+    int     ret;
+
+    ret = lstat(path, st);
+    if (ret < 0)
+	diagnose_stat();
+    return (ret);
+}
+
+/* warn_fstat - fstat with warning */
+
+int     warn_fstat(int fd, struct stat * st)
+{
+    int     ret;
+
+    ret = fstat(fd, st);
+    if (ret < 0)
+	diagnose_stat();
+    return (ret);
+}