Welcome to forums, hope you will enjoy learning here. It is called Parameter expansion, when you do a man bash you could see the following.
Quote:
${parameter##word}
Remove matching prefix pattern. The word is expanded to produce a pattern just as in pathname expansion. If the pattern matches the
beginning of the value of parameter, then the result of the expansion is the expanded value of parameter with the shortest matching pat-
tern (the ‘‘#’’ case) or the longest matching pattern (the ‘‘##’’ case) deleted. If parameter is @ or *, the pattern removal operation
is applied to each positional parameter in turn, and the expansion is the resultant list. If parameter is an array variable subscripted
with @ or *, the pattern removal operation is applied to each member of the array in turn, and the expansion is the resultant list.
Here is an example of same too.
So let's say we have following string into a variable.
So here is the use of # and ##.
As you could see above(selected text will not be shown) # is removing the text till very first space and on other hand ## is printing the text till very last(maximum) match of space. I hope this helps you.
Thanks,
R. Singh
These 2 Users Gave Thanks to RavinderSingh13 For This Post:
Hello
I was wondering what this file type means...
assuming it is some type of data.
Is ldp - Linux Doc Program?
What type of program would be used to read or interpret this file type?
As you can see I'm not a developer, and don't review these
types of files. But would like to view... (1 Reply)
Hello.
I'm looking at a file that has a ; at the beginning of certain lines. Could someone please tell me what that means? Is it a comment? Is it an execute?
Thank You (1 Reply)
Hi all,
I am sorry, I know this is not correct forum/silly question (usually this is requirement in some vacancies), but i hope someone can explain to me, what is the meaning of :
SUN Tier 3 Support
Tier 3 Application Installation
Level 2 Solaris
Level 2 AD MOM + DBA
Thank you. (0 Replies)
All,
I have a line in my code like below , could any one please tell me what this actually mean what is the & doding there.
I am in sh shell
#!/bin/sh
..............
mv &fname &III.tar.gz
Thanks in Advance,
Arun (1 Reply)
All,
In the below mentioned piece of code :
if test $# -eq 1
then
echo "Input parameter passed into DMI_weekly.ksh..." | tee -a $RUNLOG
typeset -u ORACLE_SID
export ORACLE_SID="$1"
else
echo "ERROR 060: Arguments passed... (3 Replies)
Hi,
Can someone help me with the meaning of each term in the below command in unix:
stty-aRegds,
I have searched google for a lot for this, but didnt get any success in this.
Kunwar (2 Replies)
Hello. In some script, I saw:
filename=${1:-/etc/hosts}
if && ; then
md5sum $filename
else
echo “$filename can not be processed”
fi
# Show the file if possible
ls -ld $filename 2>/dev/null
What does the first line means? In $filename I still got /etc/hosts. (2 Replies)
What would the below code snippet mean?
my ($_configParam, $_paramValue) = split(/\s*=\s*/, $_, 2);
$configParamHash{$_configParam} = $_paramValue; (2 Replies)
Please let me understand the meaning of following line in unix bash scripting .is =~ means not equal to or equal to .
if ]; then
echo -e "pmcmd startworkflow -sv ${INTSERV} -d ${INFA_DEFAULT_DOMAIN} -uv INFA_DEFAULT_DOMAIN_USER" \
"-pv INFA_DEFAULT_DOMAIN_PASSWORD -usdv... (2 Replies)
Discussion started by: harry00514
2 Replies
LEARN ABOUT SUNOS
fnmatch
fnmatch(3C) Standard C Library Functions fnmatch(3C)NAME
fnmatch - match filename or path name
SYNOPSIS
#include <fnmatch.h>
int fnmatch(const char *pattern, const char *string, int flags);
DESCRIPTION
The fnmatch() function matches patterns as described on the fnmatch(5) manual page. It checks the string argument to see if it matches the
pattern argument.
The flags argument modifies the interpretation of pattern and string. It is the bitwise inclusive OR of zero or more of the following flags
defined in the header <fnmatch.h>.
FNM_PATHNAME If set, a slash (/) character in string will be explicitly matched by a slash in pattern; it will not be matched by
either the asterisk (*) or question-mark (?) special characters, nor by a bracket ([]) expression.
If not set, the slash character is treated as an ordinary character.
FNM_NOESCAPE If not set, a backslash character () in pattern followed by any other character will match that second character
in string. In particular, "\" will match a backslash in string.
If set, a backslash character will be treated as an ordinary character.
FNM_PERIOD If set, a leading period in string will match a period in pattern; where the location of "leading" is indicated by
the value of FNM_PATHNAME:
o If FNM_PATHNAME is set, a period is "leading" if it is the first character in string or if it immediately fol-
lows a slash.
o If FNM_PATHNAME is not set, a period is "leading" only if it is the first character of string.
If not set, no special restrictions are placed on matching a period.
RETURN VALUES
If string matches the pattern specified by pattern, then fnmatch() returns 0. If there is no match, fnmatch() returns FNM_NOMATCH, which is
defined in the header <fnmatch.h>. If an error occurs, fnmatch() returns another non-zero value.
USAGE
The fnmatch() function has two major uses. It could be used by an application or utility that needs to read a directory and apply a pattern
against each entry. The find(1) utility is an example of this. It can also be used by the pax(1) utility to process its pattern operands,
or by applications that need to match strings in a similar manner.
The name fnmatch() is intended to imply filename match, rather than pathname match. The default action of this function is to match file-
names, rather than path names, since it gives no special significance to the slash character. With the FNM_PATHNAME flag, fnmatch() does
match path names, but without tilde expansion, parameter expansion, or special treatment for period at the beginning of a filename.
The fnmatch() function can be used safely in multithreaded applications, as long as setlocale(3C) is not being called to change the locale.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|CSI |Enabled |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe with exceptions |
+-----------------------------+-----------------------------+
SEE ALSO find(1), pax(1), glob(3C), setlocale(3C), wordexp(3C), attributes(5), fnmatch(5), standards(5)SunOS 5.10 24 Jul 2002 fnmatch(3C)