[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Option for read to handle incomplete last line
From: |
Chet Ramey |
Subject: |
Re: Option for read to handle incomplete last line |
Date: |
Sun, 24 Oct 2021 12:42:17 -0400 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 |
On 10/24/21 12:22 PM, Martin Schulte wrote:
Before reading the source I would never have thought that read sets variables
although it returns FAILURE.
Think of them as orthogonal conditions. `read' reads until a newline, or
EOF or other error condition (ignoring timeouts or reading N characters for
a minute), storing the characters it reads into the variable(s).
The variable(s) continue(s) to hold the characters read. `read' returns a
status dependent on the status of the last read(2). If it gets EOF (or
error), the return status is > 0, but the characters read are not lost.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/