From 9737d21262d03cc802a93f4cd64a240537430bd9 Mon Sep 17 00:00:00 2001
From: Trygve Laugstøl <trygvis@inamo.no>
Date: Tue, 30 May 2017 12:47:17 +0200
Subject: o Initial import of usbreset.

---
 .gitignore       |  1 +
 CMakeLists.txt   | 11 +++++++++++
 README.md        |  1 +
 src/usbreset.cpp | 40 ++++++++++++++++++++++++++++++++++++++++
 4 files changed, 53 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 CMakeLists.txt
 create mode 100644 README.md
 create mode 100644 src/usbreset.cpp

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7d303bd
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*build
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..5988f5c
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.2)
+
+project(usbreset CXX)
+
+add_executable(usbreset src/usbreset.cpp)
+target_compile_options(usbreset PUBLIC "--std=c++14")
+
+INSTALL(TARGETS usbreset
+    RUNTIME DESTINATION bin
+    LIBRARY DESTINATION lib
+    ARCHIVE DESTINATION lib)
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f338b86
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+https://askubuntu.com/questions/645/how-do-you-reset-a-usb-device-from-the-command-line/661#661
diff --git a/src/usbreset.cpp b/src/usbreset.cpp
new file mode 100644
index 0000000..76c30c0
--- /dev/null
+++ b/src/usbreset.cpp
@@ -0,0 +1,40 @@
+/* usbreset -- send a USB port reset to a USB device */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+
+#include <linux/usbdevice_fs.h>
+
+
+int main(int argc, char **argv)
+{
+    const char *filename;
+    int fd;
+    int rc;
+
+    if (argc != 2) {
+        fprintf(stderr, "Usage: usbreset device-filename\n");
+        return 1;
+    }
+    filename = argv[1];
+
+    fd = open(filename, O_WRONLY);
+    if (fd < 0) {
+        perror("Error opening output file");
+        return 1;
+    }
+
+    printf("Resetting USB device %s\n", filename);
+    rc = ioctl(fd, USBDEVFS_RESET, 0);
+    if (rc < 0) {
+        perror("Error in ioctl");
+        return 1;
+    }
+    printf("Reset successful\n");
+
+    close(fd);
+    return 0;
+}
-- 
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