err: actually implement replacement versions!

[ccan] / ccan / err / err.c

diff --git a/ccan/err/err.c b/ccan/err/err.c
new file mode 100644 (file)
index 0000000..9e0e20c
--- /dev/null
+++ b/ccan/err/err.c
@@ -0,0 +1,64 @@
+#include "err.h"
+
+#if !HAVE_ERR_H
+#include <stdarg.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+
+static const char *progname = "unknown program";
+
+void err_set_progname(const char *name)
+{
+       progname = name;
+}
+
+void NORETURN err(int eval, const char *fmt, ...)
+{
+       int err_errno = errno;
+       va_list ap;
+
+       fprintf(stderr, "%s: ", progname);
+       va_start(ap, fmt);
+       vfprintf(stderr, fmt, ap);
+       va_end(ap);
+       fprintf(stderr, ": %s\n", strerror(err_errno));
+       exit(eval);
+}
+
+void NORETURN errx(int eval, const char *fmt, ...)
+{
+       va_list ap;
+
+       fprintf(stderr, "%s: ", progname);
+       va_start(ap, fmt);
+       vfprintf(stderr, fmt, ap);
+       va_end(ap);
+       fprintf(stderr, "\n");
+       exit(eval);
+}
+
+void warn(const char *fmt, ...)
+{
+       int err_errno = errno;
+       va_list ap;
+
+       fprintf(stderr, "%s: ", progname);
+       va_start(ap, fmt);
+       vfprintf(stderr, fmt, ap);
+       va_end(ap);
+       fprintf(stderr, ": %s\n", strerror(err_errno));
+}
+
+void warnx(const char *fmt, ...)
+{
+       va_list ap;
+
+       fprintf(stderr, "%s: ", progname);
+       va_start(ap, fmt);
+       vfprintf(stderr, fmt, ap);
+       va_end(ap);
+       fprintf(stderr, "\n");
+}
+#endif