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Top Forums Programming what would happen if a process wrote to its own stdin? Post 302302635 by c_d on Tuesday 31st of March 2009 01:36:09 PM
Old 03-31-2009
Quote:
Originally Posted by pshaikh
Interesting!

I obtained file status flags of STDIN_FILENO, and it is open for O_RDWR.

Why then .\a.out < file.txt doesn't write "arghh!" to file.txt?
you cannot execute a file using \ ...it should be./a.out
and
< means you are redirecting the content of file.txt to stdin of a.out

to write "arghh!" to file.txt one would generally do ./a.out >file.txt

but in this case it will not write to file.txt because there is nothing in stdout of a.out process...
 

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PESCETTI(1)						      General Commands Manual						       PESCETTI(1)

NAME
pescetti -- Pseudo-Duplimate Generator SYNOPSIS
pescetti DESCRIPTION
This manual page documents briefly the pescetti command. OPTIONS
Here are a list of the available options and what they do. You must specify exactly one from --demo, --generate or --load. --help Prints the help text --demo Demonstration mode. Generates one hand with permutations and the tutorial for how to use them. --generate=N Generate N random boards --load=boards.txt Load boards+analysis from boards.txt --load-dds=boards.dds Load boards from boards.dds in dds format --load-analysis=tricks.txt Load analysis from tricks.txt --permutations=permutations.txt Generate the permutations and save them to the given file --curtains=curtains.txt Save curtain cards to file curtains.txt --save=boards.txt Save the boards+analysis to boards.txt --save-dds=boards.dds Save the boards to boards.dds in dds format --save-analysis=tricks.txt Save the analysis to tricks.txt --format=html|txt|pdf Set the output mode to the given format --title=title Set the title for the output --output=hands.txt Print the hands to hands.txt, rather than to standard output --stats Generate statistics about the set of boards; included in the hands output --analyze Run the dds analyzer on the boards and print the resulting numberof tricks (warning SLOW) --criteria= A list of criteria to apply to each generated hand to generate specific hand types. The list should be space separated and each item may be suffixed with a colon and a (fractional) probability value which can be used to weight the criteria. E.g. --criteria="weaknt:0.8 strongnt:0.5" Valid criteria are: unbalanced weaknt strongnt twont strongtwo weaktwo three twoclubs 4441 singlesuit twosuits partscore game slam game-invite slam-invite jumpshift jumpfit splinter bacon weird --probability=factor Generate hands matching the criteria with only the given probability. Factor is in the range 0 to 1. On each attempt to generate a board it is rejected if it doesn't match the criteria with the given probability. A factor of about 0.8 gives roughly half matching boards AUTHOR
This manual page was written by Matthew Johnson <debian@matthew.ath.cx>. Permission is granted to copy, distribute and/or modify this docu- ment under the terms of the GNU General Public License, Version 2 as published by the Free Software Foundation. On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL. PESCETTI(1)
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