9 files changed, 119 insertions, 0 deletions
diff --git a/lib/errors/cerr.c b/lib/errors/cerr.c
new file mode 100644
index 0000000..bf5a98d
--- /dev/null
+++ b/lib/errors/cerr.c
@@ -0,0 +1,14 @@
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include "errors.h"
+
+void
+cerr(int code, const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	vwarn(fmt, ap);
+	va_end(ap);
+	exit(code);
+}
diff --git a/lib/errors/cerrx.c b/lib/errors/cerrx.c
new file mode 100644
index 0000000..b614f47
--- /dev/null
+++ b/lib/errors/cerrx.c
@@ -0,0 +1,14 @@
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include "errors.h"
+
+void
+cerrx(int code, const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	vwarnx(fmt, ap);
+	va_end(ap);
+	exit(code);
+}
diff --git a/lib/errors/err.c b/lib/errors/err.c
new file mode 100644
index 0000000..906e661
--- /dev/null
+++ b/lib/errors/err.c
@@ -0,0 +1,14 @@
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include "errors.h"
+
+void
+err(const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	vwarn(fmt, ap);
+	va_end(ap);
+	exit(EXIT_FAILURE);
+}
diff --git a/lib/errors/errx.c b/lib/errors/errx.c
new file mode 100644
index 0000000..1fd55af
--- /dev/null
+++ b/lib/errors/errx.c
@@ -0,0 +1,14 @@
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include "errors.h"
+
+void
+errx(const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	vwarnx(fmt, ap);
+	va_end(ap);
+	exit(EXIT_FAILURE);
+}
diff --git a/lib/errors/setprogname.c b/lib/errors/setprogname.c
new file mode 100644
index 0000000..ab2de3e
--- /dev/null
+++ b/lib/errors/setprogname.c
@@ -0,0 +1,12 @@
+#include <string.h>
+
+#include "errors.h"
+
+const char *__mlib_errors_progname;
+
+void
+setprogname(const char *s)
+{
+	const char *p = strrchr(s, '/');
+	__mlib_errors_progname = p ? p + 1 : s;
+}
diff --git a/lib/errors/vwarn.c b/lib/errors/vwarn.c
new file mode 100644
index 0000000..bc6bd16
--- /dev/null
+++ b/lib/errors/vwarn.c
@@ -0,0 +1,15 @@
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "errors.h"
+
+void
+vwarn(const char *fmt, va_list ap)
+{
+	int save = errno;
+	fprintf(stderr, "%s: ", progname());
+	vfprintf(stderr, fmt, ap);
+	fprintf(stderr, ": %s\n", strerror(save));
+}
diff --git a/lib/errors/vwarnx.c b/lib/errors/vwarnx.c
new file mode 100644
index 0000000..72d8fa7
--- /dev/null
+++ b/lib/errors/vwarnx.c
@@ -0,0 +1,12 @@
+#include <stdarg.h>
+#include <stdio.h>
+
+#include "errors.h"
+
+void
+vwarnx(const char *fmt, va_list ap)
+{
+	fprintf(stderr, "%s: ", progname());
+	vfprintf(stderr, fmt, ap);
+	fputc('\n', stderr);
+}
diff --git a/lib/errors/warn.c b/lib/errors/warn.c
new file mode 100644
index 0000000..78f3e36
--- /dev/null
+++ b/lib/errors/warn.c
@@ -0,0 +1,12 @@
+#include <stdarg.h>
+
+#include "errors.h"
+
+void
+warn(const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	vwarn(fmt, ap);
+	va_end(ap);
+}
diff --git a/lib/errors/warnx.c b/lib/errors/warnx.c
new file mode 100644
index 0000000..ea50299
--- /dev/null
+++ b/lib/errors/warnx.c
@@ -0,0 +1,12 @@
+#include <stdarg.h>
+
+#include "errors.h"
+
+void
+warnx(const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	vwarnx(fmt, ap);
+	va_end(ap);
+}