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Full Discussion: linux sort command
Homework and Emergencies Homework & Coursework Questions linux sort command Post 302708549 by demet8 on Monday 1st of October 2012 06:09:26 PM
Old 10-01-2012
I tried your script but when I pipe file 1 into file 2 I get fatal cannot open file 2 for reading(no such file or directory). I created file 2 & tried it again after the error to see if it would work but it still failed to pipe into file 2. I initially thought awk was the solution also but this is an introductory Linux course so I felt the same way you did about the complexity of the question. Thanks for your help. I'll keep trying and hopefully I'll get it soon.
 

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pipe(2) 							   System Calls 							   pipe(2)

NAME
pipe - create an interprocess channel SYNOPSIS
#include <unistd.h> int pipe(int fildes[2]); DESCRIPTION
The pipe() function creates an I/O mechanism called a pipe and returns two file descriptors, fildes[0] and fildes[1]. The files associated with fildes[0] and fildes[1] are streams and are both opened for reading and writing. The O_NDELAY, O_NONBLOCK, and FD_CLOEXEC flags are cleared on both file descriptors. The fcntl(2) function can be used to set these flags. A read from fildes[0] accesses the data written to fildes[1] on a first-in-first-out (FIFO) basis and a read from fildes[1] accesses the data written to fildes[0] also on a FIFO basis. Upon successful completion pipe() marks for update the st_atime, st_ctime, and st_mtime fields of the pipe. RETURN VALUES
Upon successful completion, 0 is returned. Otherwise, -1 is returned and errno is set to indicate the error. ERRORS
The pipe() function will fail if: EMFILE More than {OPEN_MAX} file descriptors are already in use by this process. ENFILE The number of simultaneously open files in the system would exceed a system-imposed limit. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Async-Signal-Safe | +-----------------------------+-----------------------------+ SEE ALSO
sh(1), fcntl(2), fstat(2), getmsg(2), poll(2), putmsg(2), read(2), write(2), attributes(5), standards(5), streamio(7I) NOTES
Since a pipe is bi-directional, there are two separate flows of data. Therefore, the size (st_size) returned by a call to fstat(2) with argument fildes[0] or fildes[1] is the number of bytes available for reading from fildes[0] or fildes[1] respectively. Previously, the size (st_size) returned by a call to fstat() with argument fildes[1] (the write-end) was the number of bytes available for reading from fildes[0] (the read-end). SunOS 5.11 23 Apr 2002 pipe(2)
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