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-rw-r--r--src/include/c.h6
-rw-r--r--src/include/pg_config.h.in4
-rw-r--r--src/include/utils/elog.h30
3 files changed, 22 insertions, 18 deletions
diff --git a/src/include/c.h b/src/include/c.h
index 1e50103095b..0a4757e29fd 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -126,10 +126,14 @@
/* GCC and XLC support format attributes */
#if defined(__GNUC__) || defined(__IBMC__)
#define pg_attribute_format_arg(a) __attribute__((format_arg(a)))
-#define pg_attribute_printf(f,a) __attribute__((format(PG_PRINTF_ATTRIBUTE, f, a)))
+/* Use for functions wrapping stdio's printf, which often doesn't take %m: */
+#define pg_attribute_printf(f,a) __attribute__((format(printf, f, a)))
+/* Use for elog/ereport, which implement %m for themselves: */
+#define pg_attribute_printf_m(f,a) __attribute__((format(PG_PRINTF_ATTRIBUTE_M, f, a)))
#else
#define pg_attribute_format_arg(a)
#define pg_attribute_printf(f,a)
+#define pg_attribute_printf_m(f,a)
#endif
/* GCC, Sunpro and XLC support aligned, packed and noreturn */
diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index b7e469670f4..05775a3405f 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -809,8 +809,8 @@
/* PostgreSQL major version as a string */
#undef PG_MAJORVERSION
-/* Define to gnu_printf if compiler supports it, else printf. */
-#undef PG_PRINTF_ATTRIBUTE
+/* Define as a format archetype that accepts %m, if available, else printf. */
+#undef PG_PRINTF_ATTRIBUTE_M
/* PostgreSQL version as a string */
#undef PG_VERSION
diff --git a/src/include/utils/elog.h b/src/include/utils/elog.h
index 7a9ba7f2fff..4f4091d8cc8 100644
--- a/src/include/utils/elog.h
+++ b/src/include/utils/elog.h
@@ -133,25 +133,25 @@ extern int errcode(int sqlerrcode);
extern int errcode_for_file_access(void);
extern int errcode_for_socket_access(void);
-extern int errmsg(const char *fmt,...) pg_attribute_printf(1, 2);
-extern int errmsg_internal(const char *fmt,...) pg_attribute_printf(1, 2);
+extern int errmsg(const char *fmt,...) pg_attribute_printf_m(1, 2);
+extern int errmsg_internal(const char *fmt,...) pg_attribute_printf_m(1, 2);
extern int errmsg_plural(const char *fmt_singular, const char *fmt_plural,
- unsigned long n,...) pg_attribute_printf(1, 4) pg_attribute_printf(2, 4);
+ unsigned long n,...) pg_attribute_printf_m(1, 4) pg_attribute_printf_m(2, 4);
-extern int errdetail(const char *fmt,...) pg_attribute_printf(1, 2);
-extern int errdetail_internal(const char *fmt,...) pg_attribute_printf(1, 2);
+extern int errdetail(const char *fmt,...) pg_attribute_printf_m(1, 2);
+extern int errdetail_internal(const char *fmt,...) pg_attribute_printf_m(1, 2);
-extern int errdetail_log(const char *fmt,...) pg_attribute_printf(1, 2);
+extern int errdetail_log(const char *fmt,...) pg_attribute_printf_m(1, 2);
extern int errdetail_log_plural(const char *fmt_singular,
const char *fmt_plural,
- unsigned long n,...) pg_attribute_printf(1, 4) pg_attribute_printf(2, 4);
+ unsigned long n,...) pg_attribute_printf_m(1, 4) pg_attribute_printf_m(2, 4);
extern int errdetail_plural(const char *fmt_singular, const char *fmt_plural,
- unsigned long n,...) pg_attribute_printf(1, 4) pg_attribute_printf(2, 4);
+ unsigned long n,...) pg_attribute_printf_m(1, 4) pg_attribute_printf_m(2, 4);
-extern int errhint(const char *fmt,...) pg_attribute_printf(1, 2);
+extern int errhint(const char *fmt,...) pg_attribute_printf_m(1, 2);
/*
* errcontext() is typically called in error context callback functions, not
@@ -165,7 +165,7 @@ extern int errhint(const char *fmt,...) pg_attribute_printf(1, 2);
extern int set_errcontext_domain(const char *domain);
-extern int errcontext_msg(const char *fmt,...) pg_attribute_printf(1, 2);
+extern int errcontext_msg(const char *fmt,...) pg_attribute_printf_m(1, 2);
extern int errhidestmt(bool hide_stmt);
extern int errhidecontext(bool hide_ctx);
@@ -222,13 +222,13 @@ extern int getinternalerrposition(void);
#endif /* HAVE__VA_ARGS */
extern void elog_start(const char *filename, int lineno, const char *funcname);
-extern void elog_finish(int elevel, const char *fmt,...) pg_attribute_printf(2, 3);
+extern void elog_finish(int elevel, const char *fmt,...) pg_attribute_printf_m(2, 3);
/* Support for constructing error strings separately from ereport() calls */
extern void pre_format_elog_string(int errnumber, const char *domain);
-extern char *format_elog_string(const char *fmt,...) pg_attribute_printf(1, 2);
+extern char *format_elog_string(const char *fmt,...) pg_attribute_printf_m(1, 2);
/* Support for attaching context information to error reports */
@@ -407,9 +407,9 @@ extern void set_syslog_parameters(const char *ident, int facility);
#endif
/*
- * Write errors to stderr (or by equal means when stderr is
- * not available). Used before ereport/elog can be used
- * safely (memory context, GUC load etc)
+ * Write errors to stderr (or by comparable means when stderr is not
+ * available). Used before ereport/elog can be used safely (memory context,
+ * GUC load etc). Note that this does *not* accept "%m".
*/
extern void write_stderr(const char *fmt,...) pg_attribute_printf(1, 2);