But uv_write need a request type as first argument. How to deal with that? On Saturday, 21 June 2014 02:16:38 UTC+5:30, Saúl Ibarra Corretgé wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 06/20/2014 06:41 PM, Arjun RP wrote: > > Hi all, How to write a program in which the main program spawns an > > executable, the main program need to pass data to the stdin of > > newly created process, then the new process will write something > > back to stdout. The stdout and stdin of new process can be > > manipulated using our parent process, but in all the tutorials and > > examples( > https://github.com/joyent/libuv/blob/master/test/test-stdio-over-pipes.c#L141 > > > > > ) are written in such a way that at first the parent will read something > > from the child, then the parent write to the client. How can we > > write code where the parent needs to write first and read last > > > > For a sample test, let our executable be an echo client like: > > #include<stdio.h> int main(){ char a[1024]="\0"; scanf("%s",a); > > //read something from stdin printf("%s",a); // echo the data read > > from stdin to stdout return 0; } > > > > Hi, > > After you spawned the new process with 2 pipes for stdio, you can just > uv_write to the pipe representing the child process' stdin, there is > no ordering requirement for read/write operations. > > > Cheers, > > - -- > Saúl Ibarra Corretgé > bettercallsaghul.com > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1 > Comment: Using GnuPG with Icedove - http://www.enigmail.net/ > > iQIcBAEBAgAGBQJTpJ1vAAoJEEEOVVOum8BZWpIP+QGInXf9tV4e0M0rz5yBiMtn > pXs4UvFK41GXGMhP4Q1QS5DwaYJ6nNZJfF5PooY0yrFN0Bl+rA/oCqKO/PyL0eKv > A46UBLvesS49GOyL1We4d9FGV4gGwxdD0H9lmZWIQMRoQRcXz+t9MQJ8nCqg2VWD > tiX4yQFT//Ru38Jrag2JO3C+FvqsNayqXyMMgH7MFpquF3lhkTW1HGyJdDL1ycGQ > ZfF0eGDeB5m3IPmJweVnSwsU9jcAJ2HX1bjeO8t2qCII1P4s79G8/MX/uZt4zHfv > eHs5VFkZebh18E6VTQMxvPyYprBLesn0FSUaFbCgo88RoytucHjAVEce1zMVj+ei > QqDs0h7ZiqQcUMC1qls5Ju4ipHnEWJleAv6BVemgWhpSPUNCvFwyCvABmDOZk2zn > smN++Nx1ygp4ZX4T5tjNnjjlqRIou+0oSFUdkICOjs7Z3EIm0LDJvGIXGt1YGTNE > IfddTud4JgYp+AjimSjm/e0rx92XtnKEb8f9HUoiotsT7aAiM9x4uSPeLJsDkdUP > AH0dS2RGsKAxdcY++gDGFWIyUe/gQ8O6qTF27jJm8pmDA+wGElT0jk2wBzBUooNS > c2GTs09ttJs2pTkMi0pi1W5JIyRzwuUoAb0+o1hNIXR0b4+ZK/LM7Yu2DzesbSZ3 > ycU6x+EC4rrv9jj5Q/FR > =yjU8 > -----END PGP SIGNATURE----- >
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