redirect stdout


 
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Old 01-16-2009
Make a copy of the original ones...
Code:
int saved_fds[2];

saved_fds[0] = dup(STDOUT_FILENO);
saved_fds[1] = dup(STDERR_FILENO);

When you're done redirecting, you dup2 these back into place:
Code:
dup2(saved_fds[0],STDOUT_FILENO);
dup2(saved_fds[1],STDOUT_FILENO);

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HPSET(1)							       LOCAL								  HPSET(1)

NAME
hpset -- printer commands SYNOPSIS
hpset [-hco] [commands ...] DESCRIPTION
hpset is used to send commands to a printer. These commands are synonyms for ESC Codes based on the PCL standard from Hewlet Packard. Options -c redirect output to stdout -oname redirect output into the specified file or device redirect -h prints a help message Commands back Puts every setting back to the printer defaults. test Starts the self test. out If paper is inside the printer it will be thrown out. cr activates the linefeed lbon acivates the linebreak. leftright forces the printer to print only from left to right. rightleft forces the printer to print only from right to left. bidirect forces the printer in both ways. execoff The following commands are not executed but printed. execon The following commands are executed. nice High quality printing. econo Enables fast and economic printing. landscape Printing in landscape format. portrait Printing in portrait format. lpinum Sets the lines per inch. For num use 6 or 8. The following commands must be sent in the given order and sequence. The sequence looks like, hpset [characterset] [characterdistance] [character density] [point size] [type position] [line strength] [type] -Characterset english ISO 4 ansi ANSI ASCII ISO 6 sweden ISO 10 italian ISO 15 spain ISO 17 german ISO 21 france ISO 69 -Characterdistance prop Proportional fix Fixed If you've chosen proportional you don't have to set the character density. -Characterdensity cpi# # is one of 5,6,10,12,16,16.67,20,24 -Pointsize point# # is one of 4.75,5,6,7,8,9.5,10,12,14,19,24 -Typeposition italic upright -Linestrength bold normal -Type courier times gothic univers Notice that not every combination of the commands above is possible. Refer to the manual of HPSET where you can find a table with allowed combinations. SEE ALSO
lpr(1), lpd(1), BUGS
report them to michael.janson@stud.uni-karlsruhe.de LINUX
April 27, 1997 LINUX