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Top Forums Shell Programming and Scripting i want to delete a file based on existing file in a directory Post 302070980 by vino on Tuesday 11th of April 2006 04:38:02 AM
Old 04-11-2006
man sh -> sub topic "Parameter Expansion".

Code:
       ${parameter#word}
       ${parameter##word}
              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 pattern (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.

       ${parameter%word}
       ${parameter%%word}
              The  word  is  expanded to produce a pattern just as in pathname
              expansion.  If the pattern matches a  trailing  portion  of  the
              expanded 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.

 

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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)
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