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Old October 24th, 2001, 09:43 AM
JeffCT JeffCT is offline
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Posts: 1,437 JeffCT User rank is Lance Corporal (50 - 100 Reputation Level)JeffCT User rank is Lance Corporal (50 - 100 Reputation Level)JeffCT User rank is Lance Corporal (50 - 100 Reputation Level) 
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Reputation Power: 9
xterm buffers program output?

Whenever I run a program through an xterm it seems to buffer all of the output (to stdout) until the program is finished. I thought this was just a PHP thing but I wrote similar scripts in C and Perl and they do the same.

Scripts:

PHP
PHP Code:
for($i=0;$i<10;$i++)
{
      echo 
"Hi...\n";
      
flush();
      
sleep(2);



Perl
Code:
for($i=0;$i<10;$i++)
{
     print "Hi...\n";
     sleep(2);
}


C
Code:
#include <stdio.h>

void main()
{
     int i;

     for(i=0;i<10;i++)
     {
          printf("Hi...\n");
          sleep(2);
     }
}


They all do the same thing... I get

Hi...Hi...Hi...Hi...Hi...Hi...Hi...Hi...Hi...Hi...

after 20 seconds.

Maybe I'm just stupid but I could swear I never had this problem when writing QBasic and C programs for DOS years ago...

I have also tried things like this:

./program.php | more
./program.php > output

But the output is still buffered until the end...

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