bash provides many functionalities that sh does not, for instance "process substitution" that you use in your code sample.
You need to output to two files, and paste those, or you need to play dirty tricks, like
Code:
$ mkfifo J
$ { code1; } | paste - J & # paste stdin and the FIFO; put in background
$ { code2; } > J # print to FIFO
$ rm J
Generally, I don't consider using fifo's to be in any way dirty. However, the way you're using one here is unreliable. The successful completion of your approach depends on several factors:
1. The shell's execution environment. If job control is enabled, each background job runs in its own process group. Background process groups may not be able to write to the terminal.
2. Terminal settings. If tostop is enabled (see stty), writes to the terminal by a process not in the foreground process group triggers SIGTTOU signals to all processes in the process group.
3. Process signal masks. If the writing process is blocking or ignoring SIGTTOU, then the signal isn't sent to the process group.
The following approach could be stopped as soon as paste tries to write.
Code:
mkfifo f1
cat <<EOF | paste - f1 &
1
2
3
EOF
cat <<EOF >f1
a
b
c
EOF
For a more reliable approach, I would suggest using a second fifo:
Code:
mkfifo f1 f2
cat <<EOF >f1 &
1
2
3
EOF
cat <<EOF >f2 &
a
b
c
EOF
paste f1 f2
Hai ,
When i use paste command in command prompt its giving expected output but not in the script. Below is the example.
$cat file
1
2
3
$cat file1
4
5
6
$paste -d ':' file file1
1:4
2:5
3:6
but when i used the same command in script its giving the output as below :
1
2
3 (3 Replies)
there are lot of files where in mostly all the file contains 2columnsAl,1
Ail,13
Al,3
Al,1
Al,3
Al,2
Al,3
Al,1
Al,1
Al,1
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Hi,
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20010101.txt 20010106.txt 20010111.txt
20010116.txt 20010121.txt 20010126.txt
20010131.txt 20010205.txt 20010210.txt
20010215.txt 20010220.txt 20010225.txt
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andrew kid baker
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Thanks (3 Replies)
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Problem with Paste command :)
Hi All,
i need small suggestion in my below script...
i have output in .txt format like below
file1.txt
01111111
02222222
03333333
file2.txt
230125
000012
000002
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