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tools/lib/: new helper function for daemonification

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- include/daemon.h (daemonize), lib/daemon.c: shed all ties with the
  process' previous surroundings
- lib/Makefile (OBJS): added daemon.o
This commit is contained in:
Werner Almesberger 2011-05-18 13:34:26 -03:00
parent e86997e94d
commit 43f179d6d8
4 changed files with 170 additions and 3 deletions
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108
prod/doc/index.html
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@ -29,6 +29,9 @@ Devices accepted for further use can then be packaged for shipping.
Defective devices can be discarded or retained for a deeper analysis.
<!-- ====================================================================== -->
<H2>Terminology</H2>
<DL>
@ -73,16 +76,89 @@ Defective devices can be discarded or retained for a deeper analysis.
</DL>
<H2>Setup</H2>
<!-- ====================================================================== -->
<H2>Software setup</H2>
Before performing any production tests, various pieces of software
need to be installed on Ben and PC, and configuration settings
@@@
<!-- ---------------------------------------------------------------------- -->
<H3>PC software installation</H3>
<H3>Ben software installation</H3>
@@@
<H4>Install ben-wpan tools</H4>
@@@
<H4>Register Ben host name</H4>
To simplify accessing the Ben via TCP/IP, its IP address should be
registered in the hosts file on the PC. If the Ben is running OpenWrt,
use the following command:
<PRE>
echo 192.168.254.101 ben >>/etc/hosts
</PRE>
<P>
If the Ben is running Jlime, the address would be as follows:
<PRE>
echo 192.168.1.202 ben >>/etc/hosts
</PRE>
<P>
If using the same PC with Bens running OpenWrt and Jlime, one may choose
different host names depending on the distribution, and adapt the commands
used in the production and testing process accordingly. For example,
<PRE>
echo 192.168.254.101 ben >>/etc/hosts
echo 192.168.1.202 jlime >>/etc/hosts
</PRE>
<!-- ---------------------------------------------------------------------- -->
<H3>Ben software setup</H3>
This needs to be done each time the Ben is booted.
<H4>Enable network access</H4>
<H4>Silence other 8:10 card users</H4>
<!-- ---------------------------------------------------------------------- -->
<H3>Ben software installation</H3>
<H4>Password-less remote access</H4>
To enable password-less remote access from the PC, setup to betwork
access to the Ben and run the following command:
<PRE>
ssh ben 'cat >>/etc/dropbear/authorized_keys' <~/.ssh/id_rsa.pub
</PRE>
<!-- ---------------------------------------------------------------------- -->
<H3>Test profiles</H3>
<!-- ====================================================================== -->
<H2>Flashing (atusb only)<H2>
<!-- ---------------------------------------------------------------------- -->
<H3>Flashing the boot loader</H3>
<P>
@ -90,6 +166,9 @@ Defective devices can be discarded or retained for a deeper analysis.
<P>
<!-- ---------------------------------------------------------------------- -->
<H3>Flashing the application</H3>
<P>
@ -97,28 +176,53 @@ Defective devices can be discarded or retained for a deeper analysis.
<P>
<!-- ====================================================================== -->
<H2>Functional test</H2>
<!-- ---------------------------------------------------------------------- -->
<H3>Test setup for atben</H3>
<P>
<IMG src="setup-A.png">
<P>
<!-- ---------------------------------------------------------------------- -->
<H3>Test setup for atusb</H3>
<P>
<IMG src="setup-B.png">
<P>
<!-- ---------------------------------------------------------------------- -->
<H3>Test procedure</H3>
<!-- ====================================================================== -->
<H2>Fault analysis</H2>
<!-- ---------------------------------------------------------------------- -->
<H3>Component placement and orientation</H3>
<!-- ---------------------------------------------------------------------- -->
<H3>Supply voltages</H3>
<!-- ---------------------------------------------------------------------- -->
<H3>Clock frequency</H3>
The flawless performance of the crystal oscillator is crucial for

22
tools/include/daemon.h Normal file
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@ -0,0 +1,22 @@
/*
* include/daemon.h - Helper functions for proper daemonification
*
* Written 2011 by Werner Almesberger
* Copyright 2011 Werner Almesberger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef DAEMON_H
#define DAEMON_H
#include <unistd.h>
pid_t daemonize(void);
#endif /* !DAEMON_H */

2
tools/lib/Makefile
View File

@ -19,7 +19,7 @@ OBJS_host = atusb.o usbopen.o
OBJS_ben_jlime = atben.o
OBJS_ben_openwrt = atben.o
OBJS = atrf.o atnet.o misctxrx.o cwtest.o netio.o $(OBJS_$(TARGET))
OBJS = atrf.o atnet.o misctxrx.o cwtest.o netio.o daemon.o $(OBJS_$(TARGET))
.PHONY: all clean spotless

41
tools/lib/daemon.c Normal file
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@ -0,0 +1,41 @@
/*
* lib/daemon.c - Helper functions for proper daemonification
*
* Written 2011 by Werner Almesberger
* Copyright 2011 Werner Almesberger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include "daemon.h"
pid_t daemonize(void)
{
pid_t pid;
int i;
pid = fork();
if (pid < 0) {
perror("fork");
exit(1);
}
if (pid)
return pid;
if (setsid() < 0) {
perror("setsid");
exit(1);
}
for (i = 0; i <= 2; i++)
(void) close(i);
(void) chdir("/");
return 0;
}