apps/examples/random: Add a test for /dev/random
This commit is contained in:
Gregory Nutt
parent
bf17953959
commit
a976360e0d
@ -684,6 +684,7 @@
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* apps/Makefile: Need to include external/Make.defs if we want
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allow external applications to participate in the NuttX
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configuration. Suggested by gdi@embedders.org (2013-10-14).
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* apps/examplex/cc3300: Updates as part of larger re-organizaion
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* apps/examples/cc3300: Updates as part of larger re-organizaion
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of CC3000 logic by David Sidrane (2013-10-16).
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* apps/examples/random: Add a simple test that dumps values from
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/dev/random (2013-10-20).
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@ -42,6 +42,7 @@ source "$APPSDIR/examples/poll/Kconfig"
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source "$APPSDIR/examples/pwm/Kconfig"
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source "$APPSDIR/examples/posix_spawn/Kconfig"
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source "$APPSDIR/examples/qencoder/Kconfig"
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source "$APPSDIR/examples/random/Kconfig"
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source "$APPSDIR/examples/relays/Kconfig"
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source "$APPSDIR/examples/rgmp/Kconfig"
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source "$APPSDIR/examples/romfs/Kconfig"
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@ -194,6 +194,10 @@ ifeq ($(CONFIG_EXAMPLES_QENCODER),y)
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CONFIGURED_APPS += examples/qencoder
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endif
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ifeq ($(CONFIG_EXAMPLES_RANDOM),y)
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CONFIGURED_APPS += examples/random
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endif
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ifeq ($(CONFIG_EXAMPLES_RELAYS),y)
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CONFIGURED_APPS += examples/relays
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endif
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@ -41,10 +41,10 @@ SUBDIRS = adc buttons can cc3000 cxxtest dhcpd discover elf flash_test
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SUBDIRS += ftpc ftpd hello helloxx hidkbd igmp json keypadtest lcdrw
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SUBDIRS += mm modbus mount mtdpart nettest nrf24l01_term nsh null nx
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SUBDIRS += nxconsole nxffs nxflat nxhello nximage nxlines nxtext ostest
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SUBDIRS += pashello pipe poll posix_spawn pwm qencoder relays rgmp romfs
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SUBDIRS += sendmail serloop slcd smart smart_test tcpecho telnetd thttpd tiff
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SUBDIRS += touchscreen udp uip usbserial usbterm watchdog wget wgetjson
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SUBDIRS += xmlrpc
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SUBDIRS += pashello pipe poll posix_spawn pwm qencoder random relays rgmp
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SUBDIRS += romfs sendmail serloop slcd smart smart_test tcpecho telnetd
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SUBDIRS += thttpd tiff touchscreen udp uip usbserial usbterm watchdog
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SUBDIRS += wget wgetjson xmlrpc
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# Sub-directories that might need context setup. Directories may need
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# context setup for a variety of reasons, but the most common is because
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@ -55,9 +55,9 @@ CNTXTDIRS = pwm
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ifeq ($(CONFIG_NSH_BUILTIN_APPS),y)
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CNTXTDIRS += adc can cc3000 cxxtest dhcpd discover flash_test ftpd
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CNTXTDIRS += hello helloxx json keypadtestmodbus lcdrw mtdpart nettest
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CNTXTDIRS += nx nxhello nximage nxlines nxtext nrf24l01_term ostest relays
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CNTXTDIRS += qencoder slcd smart_test tcpecho telnetd tiff touchscreen
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CNTXTDIRS += usbterm watchdog wgetjson
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CNTXTDIRS += nx nxhello nximage nxlines nxtext nrf24l01_term ostest random
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CNTXTDIRS += relays qencoder slcd smart_test tcpecho telnetd tiff
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CNTXTDIRS += touchscreen usbterm watchdog wgetjson
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endif
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all: nothing
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@ -1307,6 +1307,28 @@ examples/qencoder
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is defined, then this value is the default delay if no other delay is
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provided on the command line. Default: 100 milliseconds
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examples/random
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^^^^^^^^^^^^^^^
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This is a very simply test of /dev/random. It simple collects random
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numbers and displays them on the console.
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Prerequistes:
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CONFIG_DEV_RANDOM - Support for /dev/random must be enabled in order
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to select this example.
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Configuration:
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CONFIG_EXAMPLES_RANDOM - Enables the /dev/random test
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CONFIG_EXAMPLES_MAXSAMPLES - This is the size of the /dev/random I/O
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buffer in units of 32-bit samples. Careful! This buffer is allocated
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on the stack as needed! Default 64.
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CONFIG_EXAMPLES_NSAMPLES; - When you execute the rand command, a number
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of samples ranging from 1 to EXAMPLES_MAXSAMPLES may be specified. If
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no argument is specified, this is the default number of samples that\
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will be collected and displayed. Default 8
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examples/relays
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^^^^^^^^^^^^^^^
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11
examples/random/.gitignore
vendored
Normal file
11
examples/random/.gitignore
vendored
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@ -0,0 +1,11 @@
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/Make.dep
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/.depend
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/.built
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/*.asm
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/*.obj
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/*.rel
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/*.lst
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/*.sym
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/*.adb
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/*.lib
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/*.src
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31
examples/random/Kconfig
Normal file
31
examples/random/Kconfig
Normal file
@ -0,0 +1,31 @@
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#
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# For a description of the syntax of this configuration file,
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# see misc/tools/kconfig-language.txt.
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#
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config EXAMPLES_RANDOM
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bool "/dev/random test"
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default n
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depends on DEV_RANDOM
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---help---
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Enable a simple test of /dev/random
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if EXAMPLES_RANDOM
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config EXAMPLES_MAXSAMPLES
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int "I/O buffer size"
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default 64
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---help---
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This is the size of the /dev/random I/O buffer in units of 32-bit
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samples. Careful! This buffer is allocated on the stack as needed!
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config EXAMPLES_NSAMPLES;
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int "Default samples"
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default 8
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---help---
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When you execute the rand command, a number of samples ranging from
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1 to EXAMPLES_MAXSAMPLES may be specified. If no argument is
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specified, this is the default number of samples that will be
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collected and displayed.
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endif
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107
examples/random/Makefile
Normal file
107
examples/random/Makefile
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@ -0,0 +1,107 @@
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############################################################################
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# apps/examples/random/Makefile
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#
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# Copyright (C) 2008, 2010-2013 Gregory Nutt. All rights reserved.
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# Author: Gregory Nutt <gnutt@nuttx.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# 3. Neither the name NuttX nor the names of its contributors may be
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# used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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############################################################################
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-include $(TOPDIR)/.config
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-include $(TOPDIR)/Make.defs
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include $(APPDIR)/Make.defs
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# /dev/random test
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APPNAME = rand
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PRIORITY = SCHED_PRIORITY_DEFAULT
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STACKSIZE = 1024
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ASRCS =
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CSRCS = random_main.c
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AOBJS = $(ASRCS:.S=$(OBJEXT))
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COBJS = $(CSRCS:.c=$(OBJEXT))
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SRCS = $(ASRCS) $(CSRCS)
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OBJS = $(AOBJS) $(COBJS)
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ifeq ($(CONFIG_WINDOWS_NATIVE),y)
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BIN = ..\..\libapps$(LIBEXT)
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else
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ifeq ($(WINTOOL),y)
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BIN = ..\\..\\libapps$(LIBEXT)
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else
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BIN = ../../libapps$(LIBEXT)
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endif
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endif
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ROOTDEPPATH = --dep-path .
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# Common build
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VPATH =
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all: .built
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.PHONY: clean depend distclean
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$(AOBJS): %$(OBJEXT): %.S
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$(call ASSEMBLE, $<, $@)
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$(COBJS): %$(OBJEXT): %.c
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$(call COMPILE, $<, $@)
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.built: $(OBJS)
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$(call ARCHIVE, $(BIN), $(OBJS))
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@touch .built
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ifeq ($(CONFIG_NSH_BUILTIN_APPS),y)
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$(BUILTIN_REGISTRY)$(DELIM)$(APPNAME)_main.bdat: $(DEPCONFIG) Makefile
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$(call REGISTER,$(APPNAME),$(PRIORITY),$(STACKSIZE),$(APPNAME)_main)
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context: $(BUILTIN_REGISTRY)$(DELIM)$(APPNAME)_main.bdat
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else
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context:
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endif
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.depend: Makefile $(SRCS)
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@$(MKDEP) $(ROOTDEPPATH) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
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@touch $@
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depend: .depend
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clean:
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$(call DELFILE, .built)
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$(call CLEAN)
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distclean: clean
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$(call DELFILE, Make.dep)
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$(call DELFILE, .depend)
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-include Make.dep
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128
examples/random/random_main.c
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128
examples/random/random_main.c
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@ -0,0 +1,128 @@
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/****************************************************************************
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* examples/random/random_main.c
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <debug.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifndef CONFIG_EXAMPLES_MAXSAMPLES
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# define CONFIG_EXAMPLES_MAXSAMPLES 64
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#endif
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#ifndef CONFIG_EXAMPLES_NSAMPLES
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# define CONFIG_EXAMPLES_NSAMPLES 8
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#endif
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#if CONFIG_EXAMPLES_NSAMPLES > CONFIG_EXAMPLES_MAXSAMPLES
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# warning CONFIG_EXAMPLES_NSAMPLES > CONFIG_EXAMPLES_MAXSAMPLES
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# undef CONFIG_EXAMPLES_NSAMPLES
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# define CONFIG_EXAMPLES_NSAMPLES CONFIG_EXAMPLES_MAXSAMPLES
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* rand_main
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****************************************************************************/
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int rand_main(int argc, char *argv[])
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{
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uint32_t buffer[CONFIG_EXAMPLES_MAXSAMPLES];
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int nsamples = CONFIG_EXAMPLES_NSAMPLES;
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ssize_t nread;
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int fd;
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/* One argument is possible... the number of samples to collect */
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if (argc > 1)
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{
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nsamples = atoi(argv[1]);
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}
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/* Clip the numer of samples to the configured buffer size */
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if (nsamples > CONFIG_EXAMPLES_MAXSAMPLES)
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{
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nsamples = CONFIG_EXAMPLES_MAXSAMPLES;
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}
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/* Open /dev/random */
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fd = open("/dev/random", O_RDONLY);
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if (fd < 0)
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{
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int errcode = errno;
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fprintf(stderr, "ERROR: Failed to open /dev/random: %d\n", errcode);
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exit(EXIT_FAILURE);
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}
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/* Read the requested number of samples */
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printf("Reading %d random numbers\n", nsamples);
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nread = read(fd, buffer, nsamples * sizeof(uint32_t));
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if (nread < 0)
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{
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int errcode = errno;
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fprintf(stderr, "ERROR: Read from /dev/randon failed: %d\n", errcode);
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(void)close(fd);
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exit(EXIT_FAILURE);
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}
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/* Dump the sample buffer */
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lib_dumpbuffer("Random values", (FAR const uint8_t*)buffer, nread);
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(void)close(fd);
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return EXIT_SUCCESS;
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}
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