Overclock.net › Forums › Software, Programming and Coding › Operating Systems › Linux, Unix › Getting input from a pipe
New Posts  All Forums:Forum Nav:

Getting input from a pipe

post #1 of 2
Thread Starter 
I have to write a script called mycolumn that has one numeric parameter that represents the amount of columns the input will be broke up into. The input should be received from either a pipe, a < or the keyboard. The keyboard is easy as I can just use $2 to grab that but I have no clue how to get the input from a pipe or a < as they don't get saved in any of the $1-9 parameters. How do I go about doing this?
baby cakes
(13 items)
 
Macbook 4,1
(13 items)
 
 
CPUMotherboardGraphicsRAM
i7 930 [4.01Ghz vCore 1.28125 HT on] GA-X58A-UD3R ZOTAC GTX 460 1GB SLI [840/1680/1900 @stock volts] CORSAIR XMS3 6GB (3 x 2GB) 1600Mhz 
Hard DriveOptical DriveOSMonitor
C300 64GB SATA III, 2x F3 1TB 7200rpm RAID 0 Sony Optiarc 24X DVD/CD Ubuntu 14.04 22" Dell SP2009W 1680x1050 
PowerCase
CORSAIR HX 750W Cooler Master HAF 922 
CPUMotherboardGraphicsRAM
Core 2 Duo 2.4Ghz Penryn T8300 Some logical board GMA X3100 4GB (2x2GB) DDR2 667Mhz 
Hard DriveOptical DriveOSMonitor
Hitachi 160 GB 5400 RPM SATA II Combo drive OSX 10.6.4 (Snow leopard) 13.3" 1280x800 TFT 
PowerCase
Dying battery White macbook case 
  hide details  
Reply
baby cakes
(13 items)
 
Macbook 4,1
(13 items)
 
 
CPUMotherboardGraphicsRAM
i7 930 [4.01Ghz vCore 1.28125 HT on] GA-X58A-UD3R ZOTAC GTX 460 1GB SLI [840/1680/1900 @stock volts] CORSAIR XMS3 6GB (3 x 2GB) 1600Mhz 
Hard DriveOptical DriveOSMonitor
C300 64GB SATA III, 2x F3 1TB 7200rpm RAID 0 Sony Optiarc 24X DVD/CD Ubuntu 14.04 22" Dell SP2009W 1680x1050 
PowerCase
CORSAIR HX 750W Cooler Master HAF 922 
CPUMotherboardGraphicsRAM
Core 2 Duo 2.4Ghz Penryn T8300 Some logical board GMA X3100 4GB (2x2GB) DDR2 667Mhz 
Hard DriveOptical DriveOSMonitor
Hitachi 160 GB 5400 RPM SATA II Combo drive OSX 10.6.4 (Snow leopard) 13.3" 1280x800 TFT 
PowerCase
Dying battery White macbook case 
  hide details  
Reply
post #2 of 2
you have to read from stdin; that's all there is to it. I don't know what programming language you're using, but all of them have a facility to read from STDIN.

in a korn shell script:

Code:
#!/bin/ksh

read INPUT
print "got $INPUT from stdin"
# echo "hello" | ./above_script
got hello from stdin

# echo "hello2" > input_in_a_file.txt
# ./above_script < input_in_a_file.txt
got hello2 from stdin
TAIPEI
(10 items)
 
AURORA
(13 items)
 
 
MotherboardGraphicsRAMHard Drive
ASRock X99 Extreme11 EVGA GTX 980 Superclocked 32GB 8x4GB Corsair LPX Samsung XP941  
Hard DriveCoolingOSMonitor
Western Digital 3TB RE Noctua NH-D15 Fedora 21 Linux Samsung S27D590C 
PowerCase
Seasonic SS-1200XP Cooler Master Cosmos II 
CPUMotherboardGraphicsRAM
Dual Quad-core L5430 2.66Ghz 12mb cache Intel 5000 chipset ATI ES1000 64GB FBDIMM DDR2 PC2-5300 667Mhz 
Hard DriveOSPower
WD3000FYYZ PERC H700 w/ 512MB cache CentOS 7.2.1511 950W x2 
  hide details  
Reply
TAIPEI
(10 items)
 
AURORA
(13 items)
 
 
MotherboardGraphicsRAMHard Drive
ASRock X99 Extreme11 EVGA GTX 980 Superclocked 32GB 8x4GB Corsair LPX Samsung XP941  
Hard DriveCoolingOSMonitor
Western Digital 3TB RE Noctua NH-D15 Fedora 21 Linux Samsung S27D590C 
PowerCase
Seasonic SS-1200XP Cooler Master Cosmos II 
CPUMotherboardGraphicsRAM
Dual Quad-core L5430 2.66Ghz 12mb cache Intel 5000 chipset ATI ES1000 64GB FBDIMM DDR2 PC2-5300 667Mhz 
Hard DriveOSPower
WD3000FYYZ PERC H700 w/ 512MB cache CentOS 7.2.1511 950W x2 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Linux, Unix
Overclock.net › Forums › Software, Programming and Coding › Operating Systems › Linux, Unix › Getting input from a pipe