hi friends,

i need to capture both the stdin as well as the stdout of a program. if i use popen, i can get either of them, but not both. is there any way other than using named pipes to capture both the streams.

.

Just open two pipes. See man 2 pipe.

hi,

thanks for replying. Here's is the sample code that i used to test the feature. thanks.

#include <unistd.h>
#include <stdio.h>

int outfd[2];
int infd[2];


int oldstdin, oldstdout;

main()
{
pipe(outfd);
pipe(infd);

oldstdin = dup(0);
oldstdout = dup(1);

close(0);
close(1);

dup2(outfd[0], 0);
dup2(infd[1],1);


if(!fork())
{
char buf[100];

scanf("%s",buf);

printf("Hello %s",buf);
}
else
{
char input[100];

close(0);
close(1);

dup2(oldstdin, 0);
dup2(oldstdout, 1);


write(outfd[1],"World\n",6);

input[read(infd[0],input,100)] = 0;

printf("%s\n",input);


}





}