nkiss

commit 042b53a2a18f40c146174333b1e8dc16480684f9
Author: Nihal Jere <nihal@nihaljere.xyz>
Date:   Sun, 14 Feb 2021 20:42:23 -0600

initial commit

Diffstat:
A
kiss.c
 | 
16
++++++++++++++++
A
util.c
 | 
51
+++++++++++++++++++++++++++++++++++++++++++++++++++
A
util.h
 | 
17
+++++++++++++++++

3 files changed, 84 insertions(+), 0 deletions(-)
diff --git a/kiss.c b/kiss.c
@@ -0,0 +1,16 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "util.h"
+
+char *argv0;
+
+int main(int argc, char *argv[])
+{
+    char *kiss_path;
+
+    argv0 = argv[0];
+    if ((kiss_path = getenv("KISS_PATH")) == NULL)
+        die("KISS_PATH unset.");
+    puts(kiss_path);
+}
diff --git a/util.c b/util.c
@@ -0,0 +1,51 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <tls.h>
+
+#ifdef __OpenBSD__
+#include <unistd.h>
+#endif /* __OpenBSD__ */
+
+#include "util.h"
+
+static void
+verr(const char *fmt, va_list ap)
+{
+	if (argv0 && strncmp(fmt, "usage", sizeof("usage") - 1)) {
+		fprintf(stderr, "%s: ", argv0);
+	}
+
+	vfprintf(stderr, fmt, ap);
+
+	if (fmt[0] && fmt[strlen(fmt) - 1] == ':') {
+		fputc(' ', stderr);
+		perror(NULL);
+	} else {
+		fputc('\n', stderr);
+	}
+}
+
+void
+warn(const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	verr(fmt, ap);
+	va_end(ap);
+}
+
+void
+die(const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	verr(fmt, ap);
+	va_end(ap);
+
+	exit(1);
+}
diff --git a/util.h b/util.h
@@ -0,0 +1,17 @@
+/* See LICENSE file for copyright and license details. */
+#ifndef UTIL_H
+#define UTIL_H
+
+#undef MIN
+#define MIN(x,y)  ((x) < (y) ? (x) : (y))
+#undef MAX
+#define MAX(x,y)  ((x) > (y) ? (x) : (y))
+#undef LEN
+#define LEN(x) (sizeof (x) / sizeof *(x))
+
+extern char *argv0;
+
+void warn(const char *, ...);
+void die(const char *, ...);
+
+#endif /* UTIL_H */