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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
commitb5896ba9f6047e7031e2bdee0622d543e11a6734 (patch)
treefd7b460593a2fee1be579bec5697e6d887ea3421 /src/util/warn_stat.c
parentInitial commit. (diff)
downloadpostfix-b5896ba9f6047e7031e2bdee0622d543e11a6734.tar.xz
postfix-b5896ba9f6047e7031e2bdee0622d543e11a6734.zip
Adding upstream version 3.4.23.upstream/3.4.23upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/util/warn_stat.c')
-rw-r--r--src/util/warn_stat.c101
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
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--- /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);
+}