06-30-2016
The only way to make sure that your wrapper is always called instead of the OS supplied utility is to move the OS supplied utility to a different location and install your wrapper in the location where your OS installed cut originally.
Of course, once you have installed this wrapper, your code might or might not work properly (depending on the quality of your wrapper) and no one else on your system will be able to look at the diagnostics produced by scripts that have bugs in the way they specify field and character ranges so they can identify and fix their code.
My personal opinion is that you should spend time fixing your scripts that call cut -c 0...., cut -f 0..., and lots of other possible misuses of 0 that are now correctly diagnosed as errors by the new version of cut instead of debugging code to be sure that it changes all of the appropriate 0 characters in its argument list to 1 characters and doesn't change any 0 characters that are correctly specified and do not reference a character 0 or field 0.
These 2 Users Gave Thanks to Don Cragun For This Post:
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
We are running on a Sun cluster using ksh.
We have a script that has been running for about six months with no issues. The script has not been modified and our results are now coming out diffrent.
<BEGIN>
cat $exfile | while read line
do
... (1 Reply)
Discussion started by: bthomas
1 Replies
2. UNIX for Dummies Questions & Answers
Hi,
I am facing a weird problem with the 'Date'. If I check date multiple times in a short interval I see a different time altogether. Here is an example
$ date
Tue Jul 15 02:07:22 PDT 2008
$ date
Tue Jul 15 02:07:23 PDT 2008
$ date
Tue Jul 15 03:20:42 PDT 2008
$ date
Tue Jul 15... (5 Replies)
Discussion started by: sumitb74
5 Replies
3. UNIX for Dummies Questions & Answers
Hi,
I would like to ask for your help with my problem,
im writing a unix script to remove characters before the symbol "/", but the one being removed are characters after the symbol. Ive searched over the internet and found no answer.. hope you can help me with this.
sample:
text... (2 Replies)
Discussion started by: paoie
2 Replies
4. Red Hat
Evening,
I'm posting for help here, because I'll be honest I've reached the end of my tether, hopefully someone can give me some assistance and help me maintain a level of sanity...
I maintain a number of webservers on RHEL 5 64Bit (Red Hat Enterprise Linux Server release 5.3 (Tikanga)), the... (2 Replies)
Discussion started by: cpickering
2 Replies
5. Red Hat
Hi,
I heard a command that can collect all RHEL 5 log in a single compress file before I forget.
Does any body know...What the command is ?
Thanks. (4 Replies)
Discussion started by: nnnnnnine
4 Replies
6. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
After using the egrep command to pull certain lines from the asg5f1 (creating the asg5f1c file), I am required... (1 Reply)
Discussion started by: robrom78
1 Replies
7. IP Networking
Hello,
I'm attempting to setup a test network with a client-server based architecture using a proprietary application. The client works by communicating with the server on separate links (typically cellular connections) and then initiates a tunnel over each active link. However, in place of the... (0 Replies)
Discussion started by: shadyuk
0 Replies
8. Shell Programming and Scripting
Hi,
I am migrating few of the shell scripts from existing SUN Solaries to AIX.
My script contains some command like 'dos2unix' and 'unix2dos' which are not compatible in AIX flavour. Please let me know if there is any such commands in AIX which can replace these commands.
Thanks. (1 Reply)
Discussion started by: 46019
1 Replies
9. Red Hat
Hi all, I'm new here.
I am currently using RHEL 6.10 and transitioning to RHEL 7 soon. Some of my GUI developments are developed using Glade v2.6.8. My question is: Is Glade v2.6.8 compatible with RHEL 7? Do I need to install additional libraries or dependencies? I looked up the list of... (1 Reply)
Discussion started by: chaosvn
1 Replies
cut(1) General Commands Manual cut(1)
Name
cut - cut out selected fields of each line of a file
Syntax
cut -clist [file1 file2...]
cut -flist [-dchar] [-s] [file1 file2...]
Description
Use the command to cut out columns from a table or fields from each line of a file. The fields as specified by list can be fixed length,
that is, character positions as on a punched card (-c option), or the length can vary from line to line and be marked with a field delim-
iter character like tab (-f option). The command can be used as a filter. If no files are given, the standard input is used.
Use to make horizontal ``cuts'' (by context) through a file, or to put files together in columns. To reorder columns in a table, use and
Options
list Specifies ranges that must be a comma-separated list of integer field numbers in increasing order. With optional - indicates
ranges as in the -o option of nroff/troff for page ranges; for example, 1,4,7; 1-3,8; -5,10 (short for 1-5,10); or 3- (short
for third through last field).
-clist Specifies character positions to be cut out. For example, -c1-72 would pass the first 72 characters of each line.
-flist Specifies the fields to be cut out. For example, -f1,7 copies the first and seventh field only. Lines with no field delim-
iters are passed through intact (useful for table subheadings), unless -s is specified.
-dchar Uses the specified character as the field delimiter. Default is tab. Space or other characters with special meaning to the
shell must be quoted. The -d option is used only in combination with the -f option, according to XPG3 and SVID2/SVID3.
-s Suppresses lines with no delimiter characters. Unless specified, lines with no delimiters are passed through untouched.
Either the -c or -f option must be specified.
Examples
Mapping of user IDs to names:
cut -d: -f1,5 /etc/passwd
To set name to the current login name for the csh shell:
set name=`who am i | cut -f1 -d" "`
To set name to the current login name for the sh, sh5, and ksh shells:
name=`who am i | cut -f1 -d" "`
Diagnostics
"line too long" A line can have no more than 511 characters or fields.
"bad list for c/f option"
Missing -c or -f option or incorrectly specified list. No error occurs if a line has fewer fields than the list calls
for.
"no fields" The list is empty.
See Also
grep(1), paste(1)
cut(1)