[Haskell-cafe] Re: I/O system brokenness with named pipes
On 2008-04-15, Joe Buehler [EMAIL PROTECTED] wrote: John Goerzen wrote: So I have a need to write data to a POSIX named pipe (aka FIFO). Long story involving a command that doesn't have an option to read data from stdin, but can from a named pipe. How about /dev/stdin? Only works on Linux. -- John ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: I/O system brokenness with named pipes
On Apr 16, 2008, at 11:16 , John Goerzen wrote: On 2008-04-15, Joe Buehler [EMAIL PROTECTED] wrote: John Goerzen wrote: So I have a need to write data to a POSIX named pipe (aka FIFO). Long story involving a command that doesn't have an option to read data from stdin, but can from a named pipe. How about /dev/stdin? Only works on Linux. Hm. I see it even on our ancient Solaris 8 boxes. And I'm quite sure the *BSDs support it as well. Just how ancient / weird is this POSIX platform of yours? -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] [EMAIL PROTECTED] system administrator [openafs,heimdal,too many hats] [EMAIL PROTECTED] electrical and computer engineering, carnegie mellon universityKF8NH ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: I/O system brokenness with named pipes
You are insulting other Unixes. It works on Mac OS X, for example. On 16 Apr 2008, at 19:16, John Goerzen wrote: On 2008-04-15, Joe Buehler [EMAIL PROTECTED] wrote: John Goerzen wrote: So I have a need to write data to a POSIX named pipe (aka FIFO). Long story involving a command that doesn't have an option to read data from stdin, but can from a named pipe. How about /dev/stdin? Only works on Linux. -- John ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: I/O system brokenness with named pipes
On Apr 16, 2008, at 13:23 , Miguel Mitrofanov wrote: You are insulting other Unixes. It works on Mac OS X, for example. Not just that, but IIRC Linux was late to the party: Solaris got / dev/fd/ and /dev/stdin before Linux got /proc/$$/fd/ (which gets symlinked to /dev/fd/). -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] [EMAIL PROTECTED] system administrator [openafs,heimdal,too many hats] [EMAIL PROTECTED] electrical and computer engineering, carnegie mellon universityKF8NH ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: I/O system brokenness with named pipes
On Apr 16, 2008, at 10:25 AM, Brandon S. Allbery KF8NH wrote: On Apr 16, 2008, at 13:23 , Miguel Mitrofanov wrote: You are insulting other Unixes. It works on Mac OS X, for example. Not just that, but IIRC Linux was late to the party: Solaris got / dev/fd/ and /dev/stdin before Linux got /proc/$$/fd/ (which gets symlinked to /dev/fd/). Yeah, among people who don't know much about UNIX, Linux gets a lot of credit for things it borrowed. But /dev/stdin isn't a standard feature of UNIX, if you count AIX for example as a UNIX platform. And apparently you can compile Haskell programs on AIX - thanks to the original poster in this thread's work with GHC - so there you go. Donn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: I/O system brokenness with named pipes
On Wed April 16 2008 12:20:37 pm Brandon S. Allbery KF8NH wrote: On Apr 16, 2008, at 11:16 , John Goerzen wrote: On 2008-04-15, Joe Buehler [EMAIL PROTECTED] wrote: John Goerzen wrote: So I have a need to write data to a POSIX named pipe (aka FIFO). Long story involving a command that doesn't have an option to read data from stdin, but can from a named pipe. How about /dev/stdin? Only works on Linux. Hm. I see it even on our ancient Solaris 8 boxes. And I'm quite sure the *BSDs support it as well. Just how ancient / weird is this POSIX platform of yours? OK, so I shouldn't have said it only works on Linux, but as far as I can tell, it isn't standard (defined by POSIX). I don't presently have easy access to non-Linux machines, but I do want to be as portable as possible. -- John ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Re: I/O system brokenness with named pipes
Donn Cave wrote: I have run into this problem, with Network.Socket (socket). If I remember right, ktrace showed me what was happening. This isn't my favorite thing about Haskell. Is there even a means provided to set it back to blocking? There isn't a way right now to open a file using a blocking FD, however the IO library does support using blocking FDs (the std handles are left in blocking mode to avoid causing problems with pipes). We could certainly add an interface to let you open files in blocking mode - just submit a feature request via GHC's Trac and we'll try to get around to it (or better still, send us a patch... the code is in GHC.Handle.fdToHandle). Cheers, Simon ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: I/O system brokenness with named pipes
One question is whether the program is statically or dynamically linked, and if the latter, whether it is possible (as it is in many Unices) to slide your own open(2) definition in between the program and the system library. If it is, it's possible to slide in something that fakes /dev/stdin. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Re: I/O system brokenness with named pipes
John Goerzen wrote: So I have a need to write data to a POSIX named pipe (aka FIFO). Long story involving a command that doesn't have an option to read data from stdin, but can from a named pipe. How about /dev/stdin? -- Joe Buehler ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
