A little help please Post: 302145561

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Top Forums Shell Programming and Scripting A little help please Post 302145561 by immyakram on Wednesday 14th of November 2007 03:56:46 PM

11-14-2007

Registered User

Thing is i understand evrything to that point but then when i get onto stuff liek testing with conditions - testing charachter data, testing numeric data and testing for files. Let me give you an example if you explain this little part would be great.

Although test is most often used for decision making, it can also be used on its own as follows

$ str1=abcd
$ test $str1 = abcd
$ echo $?
0

Note: unlike the variable assignment statement in the first line in the preceding example, the test command must have the equal sign surrounded by white space.

In this example, the shell sends three arguments to test. Strings must be equivalent in both length and character by character.

$ str1="abcd "
$ test "$str1" = abcd
$ echo
$?
1

immyakram

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streqvcmp

streqvcmp(3)							Programmer's Manual						      streqvcmp(3)

NAME

       streqvcmp - compare two strings with an equivalence mapping

SYNOPSIS

       #include <your-opts.h>
       cc [...] -o outfile infile.c -lopts [...]

       int streqvcmp(char const* str1, char const* str2);

DESCRIPTION

       Using  a  character  mapping, two strings are compared for "equivalence".  Each input character is mapped to a comparison character and the
       mapped-to characters are compared for the two NUL terminated input strings.  This function name is mapped to option_streqvcmp so as to  not
       conflict with the POSIX name space.

       str1   first string

       str2   second string

RETURN VALUE

       the difference between two differing characters

ERRORS

       none checked.  Caller responsible for seg faults.

SEE ALSO

       The info documentation for the -lopts library.
       ao_string_tokenize(3),  configFileLoad(3), optionFileLoad(3), optionFindNextValue(3), optionFindValue(3), optionFree(3), optionGetValue(3),
       optionLoadLine(3), optionMemberList(3),	optionNextValue(3),  optionOnlyUsage(3),  optionProcess(3),  optionRestore(3),	optionSaveFile(3),
       optionSaveState(3), optionUnloadNested(3), optionVersion(3), strequate(3), streqvmap(3), strneqvcmp(3), strtransform(3),

								    2014-06-10							      streqvcmp(3)