1 files changed, 16 insertions, 13 deletions

diff --git a/src/diag.c b/src/diag.c
index 4909cf5..a86b060 100644
--- a/src/diag.c
+++ b/src/diag.c
@@ -14,27 +14,30 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
-
-/** bfs_diagf() implementation. */
-_printf(2, 0)
-static void bfs_vdiagf(const struct bfs_loc *loc, const char *format, va_list args) {
-	fprintf(stderr, "%s: %s@%s:%d: ", xgetprogname(), loc->func, loc->file, loc->line);
-	vfprintf(stderr, format, args);
-	fprintf(stderr, "\n");
-}
-
-void bfs_diagf(const struct bfs_loc *loc, const char *format, ...) {
+#include <unistd.h>
+
+/**
+ * Print an error using dprintf() if possible, because it's more likely to be
+ * async-signal-safe in practice.
+ */
+#if BFS_HAS_DPRINTF
+#  define veprintf(...) vdprintf(STDERR_FILENO, __VA_ARGS__)
+#else
+#  define veprintf(...) vfprintf(stderr, __VA_ARGS__)
+#endif
+
+void bfs_diagf(const char *format, ...) {
 	va_list args;
 	va_start(args, format);
-	bfs_vdiagf(loc, format, args);
+	veprintf(format, args);
 	va_end(args);
 }
 
 _noreturn
-void bfs_abortf(const struct bfs_loc *loc, const char *format, ...) {
+void bfs_abortf(const char *format, ...) {
 	va_list args;
 	va_start(args, format);
-	bfs_vdiagf(loc, format, args);
+	veprintf(format, args);
 	va_end(args);
 
 	abort();