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Shell Programming and Scripting

Replace ^Z Character

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Top Forums Shell Programming and Scripting Replace ^Z Character
# 8  
Old 11-27-2012
CentOS 6.2
Code:
[root@centos62t scripts]# cat -v file1
A B C D^Z
A^@B C D
[root@centos62t scripts]# tr '\32' ' ' < file1
A B C D 
AB C D
[root@centos62t scripts]# cat -v <(tr '\32' ' ' < file1)
A B C D 
A^@B C D
[root@centos62t scripts]# od -b file1
0000000 101 040 102 040 103 040 104 032 012 101 000 102 040 103 040 104
0000020 012
0000021

# 9  
Old 11-27-2012
Red Hat:

Code:
od -bc file1
0000000 141 040 142 040 000 040 144 040 032 012
             a          b          \0         d         032  \n

cat file1 | tr '\32' ' ' > file2

od -bc file2
0000000 141 040 142 040 000 040 144 040 040 012
             a          b          \0         d               \n

IT WORKS !!! Only the 032 got translated to 040. The 000 (\0) remains the same.

Solaris:
Code:
od -bc file1
0000000 141 040 142 040 000 040 144 040 032 012
             a          b          \0         d         032  \n

cat file1 | tr '\32' ' ' > file2

od -bc file2
0000000 141 040 142 040 040 040 144 040 040 012
             a          b                   d               \n

IT DOES NOT WORK. The 000 (\0) also got replaced to 040. Hence the NULL is getting changed to a space, though i give only ^Z (32) in command.

Please let me know your thoughts.
Last edited by Scrutinizer; 11-27-2012 at 05:14 AM.. Reason: code tags
# 10  
Old 11-27-2012
On Solaris try /usr/xpg6/bin/tr or /usr/xpg4/bin/tr instead of tr
# 11  
Old 11-27-2012
It works for me without using xpg
Code:
# uname -a
SunOS sol10m 5.10 Generic_147441-01 i86pc i386 i86pc

# printf "A B C D\nE F G H^Z\nI\0J K L\n" > file1

# tr '\32' ' ' < file1 > file2

# diff file[12]                
2c2
< E F G H
---
> E F G H

The \0 might be getting replaced writing to the terminal, but not when writing to a file.
# 12  
Old 11-27-2012
Scott -
Is your ^Z actually ASCII 26?
# 13  
Old 11-27-2012
As shown in the previous od output, yes.
Code:
# od -b file1
0000000 101 040 102 040 103 040 104 012 105 040 106 040 107 040 110 032
0000020 012 111 112 040 113 040 114 012
0000030

The Null is the "issue" because the terminal doesn't display it. So it's not really an issue at all.
# 14  
Old 11-27-2012
On Solaris 10, Sparc, I get:
Code:
$ printf '\000' | tr '\032' ' ' | od -bc
0000000

Code:
$ printf '\000' | /usr/xpg4/bin/tr '\032' ' ' | od -bc
0000000 000
          \0
0000001

Last edited by Scrutinizer; 11-27-2012 at 06:42 AM..
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