Add stopwatch

Store DEBIAN/control in src/ until build. This makes the gitignore,
clean, etc. simpler.

.gitignore

@@ -1,3 +1,3 @@
 *.deb
 a.out
-dist/usr
+dist

Makefile

@@ -1,6 +1,7 @@
 all: djl-utils.deb
 
-dist: sign pasta suptime timestamp
+dist: bin DEBIAN.control
+bin: sign pasta suptime stopwatch timestamp 
 
 sign: src/sign
 	cp src/sign dist/usr/bin
@@ -11,9 +12,16 @@ pasta: src/pasta
 suptime: src/suptime.c
 	cc -o dist/usr/bin/suptime src/suptime.c
 
+stopwatch: src/stopwatch.c
+	cc -o dist/usr/bin/stopwatch src/stopwatch.c
+
 timestamp: src/timestamp
 	cp src/timestamp dist/usr/bin
 
+DEBIAN.control: src/DEBIAN/control
+	rm -rf dist/DEBIAN
+	cp -r src/DEBIAN dist/DEBIAN
+
 djl-utils.deb: dist
 	dpkg-deb -b dist
 	mv dist.deb dist/djl-utils.deb
@@ -22,4 +30,4 @@ install: djl-utils.deb
 	dpkg -i dist/djl-utils.deb
 
 clean:
-	rm -f dist/usr/bin/* dist/djl-utils.deb
+	rm -rf dist

src/stopwatch.c

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2020 Dylan Lom <djl@dylanlom.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <poll.h>
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <termios.h>
+
+const char* argv0;
+
+void usage() {
+    fprintf(stderr, "usage: %s\n", argv0);
+    exit(1);
+}
+
+void printtime(int t) {
+    printf("\rstopwatch: %d", t);
+    fflush(stdout);
+}
+
+#define SHIFT_ARGS() argv++; argc--;
+int main(int argc, char* argv[]) {
+    argv0 = argv[0];
+    SHIFT_ARGS();
+    if (argc > 0) usage();
+
+    time_t t = 0;
+    int pollrs = 0;
+
+    /* Use non-canoncial mode on stdin */
+    struct termios old, new;
+    tcgetattr(0, &old);
+    tcgetattr(0, &new);
+    new.c_lflag &= ~(ICANON | ECHO);
+    new.c_cc[VMIN] = 0;
+    new.c_cc[VTIME] = 0;
+    tcsetattr(0, TCSANOW, &new);
+
+    struct pollfd fds[1] = {{ .fd = 0, .events = POLLIN }};
+    while (pollrs < 1) {
+        printtime(t);
+        t++;
+        pollrs = poll(fds, 1, 1000);
+    }
+    puts("\n");
+    tcsetattr(0, TCSANOW, &old);
+    return 0;
+}