The difference isnt that bad, given the read its timeout is limited only to 2nd position of post decimal indicator.
Code:
#
# Testing simple
#
declare -a ARRAY
if [ "$1" = "" ]
then while read -t 0.01 ARG
do ARRAY[${#ARRAY[@]}]="$ARG"
done
else ARRAY=( "${@}" )
fi
#
# Parsing input
#
for item in "${ARRAY[@]}"
do echo "something with $item"
done
Code:
0 ~/tmp $ time ./get-pipe.sh *
something with browser
something with get-pipe.sh
something with get-pipe-test.sh
something with test with spaces
real 0m0.002s
user 0m0.001s
sys 0m0.001s
0 ~/tmp $ time ls | ./get-pipe.sh
something with browser
something with get-pipe.sh
something with get-pipe-test.sh
something with test with spaces
real 0m0.002s
user 0m0.003s
sys 0m0.001s
Thank you and hope this helps
---------- Post updated at 06:29 ---------- Previous update was at 06:04 ----------
Now i tried to remove the array, and shorten it a bit, now it behaves weird.
Code:
[ -z "$1" ] && \
while read ARG
do set "$ARG"
done
for item in "${@}"
do echo "something with $item"
done
Code:
0 ~/tmp $ ./get-pipe.sh *
something with browser
something with get-pipe.sh
something with get-pipe-test.sh
something with test with spaces
0 ~/tmp $ ls | ./get-pipe.sh
something with test with spaces
0 ~/tmp $
Even with while IFS="$IFS\l" read ARG there was no difference.
Any ideas please?
(edit: Or should i better stay with the array?)
Last edited by sea; 06-03-2015 at 01:34 AM..
Reason: Code fix
I am writing script in c shell and using this script to read the command line arguments, but it is not working. Pl. someone let me know what is the problem.
#!/bin/csh -f
if ($#argv <> 2) then
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else
set name1 = $argv
... (1 Reply)
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i=1
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Discussion started by: SkySmart
6 Replies
LEARN ABOUT MOJAVE
pipe
PIPE(2) BSD System Calls Manual PIPE(2)NAME
pipe -- create descriptor pair for interprocess communication
SYNOPSIS
#include <unistd.h>
int
pipe(int fildes[2]);
DESCRIPTION
The pipe() function creates a pipe (an object that allows unidirectional data flow) and allocates a pair of file descriptors. The first
descriptor connects to the read end of the pipe; the second connects to the write end.
Data written to fildes[1] appears on (i.e., can be read from) fildes[0]. This allows the output of one program to be sent to another pro-
gram: the source's standard output is set up to be the write end of the pipe; the sink's standard input is set up to be the read end of the
pipe. The pipe itself persists until all of its associated descriptors are closed.
A pipe whose read or write end has been closed is considered widowed. Writing on such a pipe causes the writing process to receive a SIGPIPE
signal. Widowing a pipe is the only way to deliver end-of-file to a reader: after the reader consumes any buffered data, reading a widowed
pipe returns a zero count.
The generation of the SIGPIPE signal can be suppressed using the F_SETNOSIGPIPE fcntl command.
RETURN VALUES
On successful creation of the pipe, zero is returned. Otherwise, a value of -1 is returned and the variable errno set to indicate the error.
ERRORS
The pipe() call will fail if:
[EFAULT] The fildes buffer is in an invalid area of the process's address space.
[EMFILE] Too many descriptors are active.
[ENFILE] The system file table is full.
SEE ALSO sh(1), fork(2), read(2), socketpair(2), fcntl(2), write(2)HISTORY
A pipe() function call appeared in Version 6 AT&T UNIX.
4th Berkeley Distribution February 17, 2011 4th Berkeley Distribution
06-03-2015
