10-17-2017
-F is for specifying field separators. It's not intended to match strings. That's something you would do in the awk itself. -F can be ranges (of characters), for example -F "[a-e0-9]" would identify any character a through e, and 0 through 9 in the input as a field separators. But I doubt that's what you really want to do.
What exactly are you trying to do (without trying to tell us how you're doing it, because I think that's confusing us, well me anyway!)? It would help if you gave, also, a sample of the input file you using.
This User Gave Thanks to Scott For This Post:
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I'm trying to delete lines from a large text file using VI.
Every line that I am wanting to delete start with 'S' - all others do not. (A list of users)
I've tried using * but doesn't seem to like it...any ideas...
Doesn't have to be VI - but I'm better with VI than sed/awk. (8 Replies)
Discussion started by: peter.herlihy
8 Replies
2. UNIX for Dummies Questions & Answers
Hi guys,
a small problem today, I'm grepping a log file containing lines like this below:
Mar 09 16:04:00 blabla
Mar 09 16:04:02 blabla
Mar 09 16:04:05 blabla
Mar 09 16:04:15 blabla
Mar 09 16:05:06 blabla
Mar 09 16:05:23 blabla
Mar 09 16:05:25 blabla
... in this file I'm grepping... (5 Replies)
Discussion started by: Lomic
5 Replies
3. UNIX for Dummies Questions & Answers
when writing a shell script (bourne) and using a unix command like 'ls' is there anything special you need to do to use a wildcard (like *)? (3 Replies)
Discussion started by: benu302000
3 Replies
4. UNIX for Dummies Questions & Answers
ok, I'm trying to write a script file that lists files with specific elements in the name into a txt file, it looks like this
ls s*.dat > file_names.txt
can't figure out whats wrong with that line, any ideas?
thanks in advance (10 Replies)
Discussion started by: benu302000
10 Replies
5. UNIX for Dummies Questions & Answers
Hi All
Please excuse another straightforward question. When creating a tar archive from a directory I am attempting to use wildcards to eliminate certain filetypes (otherwise the archive gets too large). So I am looking for something along these lines.
tar -cf archive.tar * <minus all *.rst... (5 Replies)
Discussion started by: C3000
5 Replies
6. UNIX for Dummies Questions & Answers
I am using this code to locate and modify one particular ID in a file containing thousands of entries
sed 's/^>OldID/>NewID/g' Infile > Outfile
How can I modify the code so I can rename all old IDs to a new unique ID?
I tried this
sed 's/^>*/>NewID/g' Infile > Outfile
but it did not... (10 Replies)
Discussion started by: Xterra
10 Replies
7. UNIX for Advanced & Expert Users
These 2 websites do a GREAT job of explaining different types of wildcards. I learned about the categories of characters which I never knew about at all.
GNU/Linux Command-Line Tools Guide - Wildcards
GREP (1 Reply)
Discussion started by: cokedude
1 Replies
8. UNIX for Dummies Questions & Answers
Hi,
I've got a ksh for loop with wildcards specified, and I want the wildcards to be preserved when inside the loop. Instead, it is expanding the wilcards and identifying filenames in the current directory
#!/usr/bin/ksh
list="a* b*"
for i in ${list}
do
echo 'Loop value =' ${i}
done... (2 Replies)
Discussion started by: nim
2 Replies
9. Shell Programming and Scripting
to scp using windcards you use the following :
scp 'hostname:/home/username/diff_201110*' .
Enjoy ! (0 Replies)
Discussion started by: phpsnook
0 Replies
10. Shell Programming and Scripting
When I search for the string
capId=...
using
awk '/capId=.../' file
I get successful results.
However when I feed the string as a variable, like this:
str="capId=..."
awk -v str="$str" 'index($0, str)' file
I get no results.
What can I do if I need to generate a string that contains... (1 Reply)
Discussion started by: locoroco
1 Replies
LEARN ABOUT XFREE86
xtfindfile
XtFindFile(3Xt) XT FUNCTIONS XtFindFile(3Xt)
NAME
XtFindFile - search for a file using substitutions in the path list
SYNTAX
String XtFindFile(String path, Substitution substitutions, Cardinal num_substitutions, XtFilePredicate predicate);
ARGUMENTS
path Specifies a path of file names, including substitution characters.
substitutions
Specifies a list of substitutions to make into a path.
num_substitutions
Specifies the number of substitutions passed in.
predicate Specifies a procedure to call to judge a potential file name, or NULL.
DESCRIPTION
The path parameter specifies a string that consists of a series of potential file names delimited by colons. Within each name, the percent
character specifies a string substitution selected by the following character. The character sequence ``%:'' specifies an embedded colon
that is not a delimiter; the sequence is replaced by a single colon. The character sequence ``%%'' specifies a percent character that does
not introduce a substitution; the sequence is replaced by a single percent character. If a percent character is followed by any other
character, XtFindFile looks through the specified substitutions for that character in the match field and if found replaces the percent and
match characters with the string in the corresponding substitution field. A substitution field entry of NULL is equivalent to a pointer to
an empty string. If the operating system does not interpret multiple embedded name separators in the path (i.e., ``/'' in POSIX) the same
way as a single separator, XtFindFile will collapse multiple separators into a single one after performing all string substitutions.
Except for collapsing embedded separators, the contents of the string substitutions are not interpreted by XtFindFile and may therefore
contain any operating-system-dependent characters, including additional name separators. Each resulting string is passed to the predicate
procedure until a string is found for which the procedure returns True; this string is the return value for XtFindFile. If no string
yields a True return from the predicate, XtFindFile returns NULL.
If the predicate parameter is NULL, an internal procedure that checks if the file exists, is readable, and is not a directory will be used.
It is the responsibility of the caller to free the returned string using XtFree when it is no longer needed.
SEE ALSO
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
XFree86 Version 4.7.0 XtFindFile(3Xt)