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dup and dup2 Example
#include<unistd.h>
#include<stdio.h>
#include<fcntl.h>
int main()
{
int dp,fd=open("outfile",O_WRONLY | O_CREAT|O_TRUNC,0666);
write(fd,"hello\n",6);
dp=dup(1);
puts("before");
dup2(fd,1);
puts("after");
dup2(dp,1);
puts("restore");
return 0;
}Recent Stories
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