Why not SIGPIPE for readers of pipe/FIFO? Post: 302423164

9 More Discussions You Might Find Interesting

1. Programming

Magnetic card readers

i can't find any info on developing for magnetic card readers in the unix environment. I'm developing a POS system and i want it to include credit card verification. Any direction would be hot...

2. Programming

Could someone Help me with this code please? #include <stdio.h> #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> #include <string.h> #include <fcntl.h> #define SIZE_B 256 /*buffer's size */ #define NUM_ARG 20 /* max number of args for any command */ int...

3. UNIX for Advanced & Expert Users

PIPE and FIFO buffer size

Hello! How I can increase (or decrease) the predefined pipe buffer size? Thanks!

4. Shell Programming and Scripting

Reading from blocking fifo pipe in shell script

Hi!! I have a problem reading from a fifo pipe in shell script. The idea is simple, I have a C program with two pipe files: An input pipe I use to send commands in shell script to the C program (echo "command" > input.pipe) An output pipe that I read the result of the command also in...

5. UNIX for Dummies Questions & Answers

fifo or named pipe working?

Can someone explain to me the working of fifo() system call using simple C programs so that I can implement them in the UNIX environement?

6. Programming

Pipe & fifo size limit

Hi guys. 1. how much is the size of pipe?(i mean the buffer size) 2. is this size different in various UNIX derivations? 3. what happens if we write to a full pipe? does it block until get some free space(the other side receive data) or returns an error? 3. FIFO s are physical files on the...

7. Shell Programming and Scripting

awk reading from named pipe (fifo)

I'm trying to read a fifo using awk and comming across some problems. I'm writing to the fifo from multiple processes invoked by GNU Parallel: mkfifo my_fifo awk '{ a = a + $2 } END { for (i in a) print i, a }' my_fifo | sort -nk1 > sorted_output grep -v '^@' massive_file | parallel...

8. Programming

SIGPIPE and EPIPE

When a write() writes on a broken pipe, with no readers, it generates a SIGPIPE signal and the process exits. When the write() returns -1 and errno is EPIPE? Do I have an handler for SIGPIPE, or can I ignore it?

9. Shell Programming and Scripting

UNIX fifo concurrent read from a named pipe

I have created a fifo named pipe in solaris, which writes the content of a file, line by line, into pipe as below: $ mkfifo namepipe $ cat books.txt "how to write unix code" "how to write oracle code" $ cat books.txt >> namepipe & I have a readpipe.sh script which reads the named...

LEARN ABOUT CENTOS

pcscd

PCSCD(8)							    PC/SC Lite								  PCSCD(8)

NAME

       pcscd - PC/SC Smart Card Daemon

SYNOPSIS

       pcscd [options]

OPTIONS

       -a, --apdu
	      log APDUs and SW using the debug method (see --debug).

       -c, --config file
	      Specifies the file file as an alternate location for /etc/reader.conf.d/reader.conf.

       -f, --foreground
	      Runs pcscd in the foreground and sends log messages to stderr instead of syslog(3).

       -d, --debug
	      use the lowest log level. Any log message of this level or above will be sent to stderr or syslog(3) depending on the use of --fore-
	      ground.

       --info use info log level. This is the default log level.

       --error
	      use error log level.

       --critical
	      use critical log level.

       The log levels are ordered as: debug < info < error < critical. Use a log level l will log this level and all the levels above it.

       -h, --help
	      Displays information about the pcscd command line

       -v, --version
	      Displays the program version number

       -H, --hotplug
	      Ask pcscd to rescan the USB buses for added or removed readers and re-read the /etc/reader.conf.d/reader.conf file to  detect  added
	      or removed non-USB readers (serial or PCMCIA).

DESCRIPTION

       pcscd is the daemon program for pcsc-lite. It is a resource manager that coordinates communications with smart card readers and smart cards
       and cryptographic tokens that are connected to the system.

       It allows applications to access smart cards and readers using the winscard API but without knowing details of the card or reader.

       pcscd coordinates the loading of drivers for card readers.

SERIAL SMART CARD READER DRIVERS

       Smart card reader drivers are placed in the /usr/lib64/pcsc/drivers directory. Each driver is simply an .so file.  pcscd locates the driver
       using  the  /etc/reader.conf.d/reader.conf  file.   See	the  reader.conf(5)  manual  page  for more information.  Drivers are available at
       http://www.musclecard.com/drivers.html.

USB SMART CARD READER DRIVERS

       USB smart card reader drivers are located  in  /usr/lib64/pcsc/drivers  directory  as  a  bundle.  You  shall  not  add	a  USB	driver	in
       /etc/reader.conf.d/reader.conf file.

FILES

       /etc/reader.conf.d/reader.conf : Reader configuration file

       /var/run/pcscd/pcscd.pid : process id of the running pcscd

       /usr/lib64/pcsc/drivers : directory containing bundles for USB drivers

SEE ALSO

       bundleTool(8), reader.conf(5), syslog(3)

AUTHORS

       David Corcoran <corcoran@musclecard.com> and Ludovic Rousseau <ludovic.rousseau@free.fr>

Muscle								   January 2007 							  PCSCD(8)

9 More Discussions You Might Find Interesting

1. Programming

Magnetic card readers

Discussion started by: Gekko

2. Programming

Pipe & fifo....

Discussion started by: M3xican

3. UNIX for Advanced & Expert Users

PIPE and FIFO buffer size

Discussion started by: Jus