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C++ How to use pipe() & fork() with stdin and stdout to another program
Post 302178133 by vvaidyan on Monday 24th of March 2008 06:51:43 PM
03-24-2008
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Hi,
Program A: uses pipe()
I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using:
* child
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-> execl("/path/PROGRAM B", "PROGRAM B", NULL);
* parent
-> char line;
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Hi,
Program A: uses pipe()
I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using:
* child
-> dup2(fd, STDOUT_FILENO);
-> execl("/path/PROGRAM B", "PROGRAM B", NULL);
* parent
-> char line;
-> read(fd, line, 100);
Question:
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LEARN ABOUT DEBIAN
kvkcard
KVKCARD(1) KVKCARD(1) NAME
kvkcard - a commandline tool to read information from a German medical card SYNOPSIS
kvkcard read | daemon | rdvd | rdpd [ [ -v | --verbous ] [ -fFILE | --filename=FILE ] [ -cCARDID | --cardid=CARDID ] [ -b | --beep ] [ -d | --dosmode ] [ -pPROGRAM | --program=PROGRAM ] [ -aARGUMENTS | --args=ARGUMENTS ] [ -h | --help ] ] DESCRIPTION
kvkcard is a commandline tool to read information from a German medical card (KVK or eGK). ARGUMENTS
read Read data from a German medical card. daemon Wait for insertion of a German medical card and run a program on it. rdvd Dump RDVD data structure of a card. rdpd Dump RDPD data structure of a card. -v | --verbous Every occurrence of this option increases the verbosity. -f FILE | --filename=FILE File to write to. If omitted stdout will be used. -c CARDID | --cardid=CARDID Set the ID of the card to read. -b | --beep Beep after reading a card. -d | --dosmode Output data in DOS mode. -p PROGRAM | --program=PROGRAM Program to call on cards found. -a ARGUMENTS | --args=ARGUMENTS Arguments for the program to be called -h | --help Shows this help. FILES
/etc/chipcard/ The system-wide configuration files. /var/log/chipcard/ The default log files. SEE ALSO
http://www.libchipcard.de Homepage of libchipcard project. /usr/share/doc/libchipcard-tools/ Local documentation. REVISION
Manual for kvkcard 2009 March 19th KVKCARD(1)