From fd58ceb2e11ed674452bca8066e6441f16aabc46 Mon Sep 17 00:00:00 2001
From: Alessandro Rubini <rubini@gnudd.com>
Date: Thu, 17 Jan 2013 17:23:50 +0100
Subject: [PATCH] tools: added test-tdc, that writes zero-sized blocks
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>
---
tools/.gitignore | 2 +-
tools/Makefile | 1 +
tools/test-dtc.c | 162 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 164 insertions(+), 1 deletion(-)
create mode 100644 tools/test-dtc.c
diff --git a/tools/.gitignore b/tools/.gitignore
index 67fc23c..ebec8c3 100644
--- a/tools/.gitignore
+++ b/tools/.gitignore
@@ -1,3 +1,3 @@
zio-dump
-data-to-uart
zio-cat-file
+test-dtc
\ No newline at end of file
diff --git a/tools/Makefile b/tools/Makefile
index fe9dd11..4a2567b 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -7,6 +7,7 @@ HOSTCC ?= gcc
hostprogs-y := zio-dump
hostprogs-y += zio-cat-file
+hostprogs-y += test-dtc
# The following is ugly, please forgive me by now
user: $(hostprogs-y)
diff --git a/tools/test-dtc.c b/tools/test-dtc.c
new file mode 100644
index 0000000..b0ead77
--- /dev/null
+++ b/tools/test-dtc.c
@@ -0,0 +1,162 @@
+/*
+ * Trivial utility that reports data from ZIO input channels
+ */
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <getopt.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <linux/zio.h>
+#include <linux/zio-user.h>
+
+#define FNAME "/dev/zdtc-0000-0-0-ctrl"
+
+void help(char *name)
+{
+ fprintf(stderr, "%s: Wrong number of arguments\n"
+ "Use: \"%s [<opts>]\n", name, name);
+ fprintf(stderr,
+ " -f <file> default: %s\n"
+ " -t <time> default: \"1.5\" (see code for details)\n"
+ " -p <period> default: \"0\"\n"
+ " -n <number> default: infinite\n", FNAME);
+ exit(1);
+}
+
+/* Boring parsing separated to a separate function (same code as elsewhere) */
+static int parse_ts(char *s, struct timespec *ts)
+{
+ int i, n;
+ unsigned long nano;
+ char c;
+
+ /*
+ * Hairy: if we scan "%ld%lf", the 0.009999 will become 9998 micro.
+ * Thus, scan as integer and string, so we can count leading zeros
+ */
+
+ nano = 0;
+ ts->tv_sec = 0;
+ ts->tv_nsec = 0;
+
+ if ( (i = sscanf(s, "%ld.%ld%c", &ts->tv_sec, &nano, &c)) == 1)
+ return 0; /* seconds only */
+ if (i == 3)
+ return -1; /* trailing crap */
+ if (i == 0)
+ if (sscanf(s, ".%ld%c", &nano, &c) != 1)
+ return -1; /* leading or trailing crap */
+
+ s = strchr(s, '.') + 1;
+ n = strlen(s);
+ if (n > 9)
+ return -1; /* too many decimals */
+ while (n < 9) {
+ nano *= 10;
+ n++;
+ }
+ ts->tv_nsec = nano;
+ return 0;
+}
+
+
+int main(int argc, char **argv)
+{
+ struct zio_control ctrl = {0,};
+ char *fname = FNAME;
+ int verbose = 0;
+ char *t = NULL, *p = NULL;
+ int i, fd, n = -1;
+ struct timespec ts = {1, 5};
+ struct timespec period = {0, 0};
+
+ /* -f <filename> -t <[+][secs].frac> -p <.frac> -v */
+ while ((i = getopt (argc, argv, "f:t:p:n:v")) != -1) {
+ switch(i) {
+ case 'f':
+ fname = optarg;
+ break;
+ case 't':
+ t = optarg;
+ break;
+ case 'p':
+ p = optarg;
+ break;
+ case 'n':
+ n = atoi(optarg);
+ break;
+ case 'v':
+ verbose++;
+ break;
+ default:
+ help(argv[0]);
+ }
+ }
+ if (!n)
+ help(argv[0]);
+
+ if (t) {
+ char *t2 = t;
+
+ if (t[0] == '+')
+ t2++;
+ if (parse_ts(t2, &ts) < 0) {
+ fprintf(stderr, "%s: can't parse time \"%s\"\n",
+ argv[0], t);
+ exit(1);
+ }
+ if (t[0] == '+')
+ ts.tv_sec += time(NULL);
+ }
+ if (p) {
+ if (parse_ts(p, &period) < 0) {
+ fprintf(stderr, "%s: can't parse period \"%s\"\n",
+ argv[0], p);
+ exit(1);
+ }
+ }
+
+ fd = open(fname, O_WRONLY);
+ if (fd < 0) {
+ fprintf(stderr, "%s: %s: %s\n", argv[0], fname,
+ strerror(errno));
+ exit(1);
+ }
+
+ ctrl.major_version = ZIO_MAJOR_VERSION;
+ ctrl.minor_version = ZIO_MINOR_VERSION;
+ if (verbose) {
+ printf(" time: %9li.%09li\n", ts.tv_sec, ts.tv_nsec);
+ printf("period: %9li.%09li\n", period.tv_sec, period.tv_nsec);
+ }
+ while (n != 0) {
+ ctrl.tstamp.secs = ts.tv_sec;
+ ctrl.tstamp.ticks = ts.tv_nsec;
+ if (verbose)
+ printf("%9li.%09li", ts.tv_sec, ts.tv_nsec);
+ i = write(fd, &ctrl, sizeof(ctrl));
+ if (i != sizeof(ctrl)) {
+ fprintf(stderr, "%s: %s: write error (%i bytes, %s)\n",
+ argv[0], fname, i, strerror(errno));
+ exit(1);
+ }
+ if (verbose)
+ printf("\n");
+ ts.tv_nsec += period.tv_nsec;
+ if (ts.tv_nsec >= 1000 * 1000 * 1000) {
+ ts.tv_nsec -= 1000 * 1000 * 1000;
+ ts.tv_sec++;
+ }
+ ts.tv_sec += period.tv_sec;
+ if (n > 0)
+ n--;
+ }
+ exit(0);
+}
--
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