04-15-2008
I wrote the code as follows. I purposely create an infinite loop to re-enter the directory:
while :
do
echo "Enter directory: \c"
read b
case $b in
*[!/-_A-Za-z0-9]*) echo "Error" >&2;;
*[!/-_A-Za-z0-9]) echo "Error 1" >&2;; # For experiment only
[!/-_A-Za-z0-9]*) echo "Error 2" >&2;; # For experiment only
[!/-_A-Za-z0-9]) echo "Error 3" >&2;; # For experiment only
esac
done
The result looks unpredictible to me. The ones with wrong result is indicated by "[Wrong]". They either fail to detect special character or treat valid ones as invalid. See the output below:
Enter directory: 12@ [Wrong]
Enter directory: 12@12 [Wrong]
Enter directory: 12#3]
Error
Enter directory: 12`76
Error
Enter directory: 12\87 [Wrong]
Enter directory: 12/778
Enter directory: 12%87
Error
Enter directory: 67)
Error
Enter directory: *(&*
Error
Enter directory: !76h
Error
Enter directory: (12
Error
Enter directory: `344
Error
Enter directory: 788'
Error
Enter directory: 87"+=
Error
Enter directory: 12_767
Enter directory: 788- [Wrong]
Error
Enter directory: 67-878 [Wrong]
Error
Enter directory: :78 [Wrong]
Enter directory: 878; [Wrong]
Enter directory: gha.js
Error
Enter directory: hg.
Error
Enter directory: |78
Error
Enter directory: {98}^H
Error
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LEARN ABOUT LINUX
tiffwritedirectory
TIFFWriteDirectory(3tiff) Introduction to Library Functions TIFFWriteDirectory(3tiff)
NAME
TIFFWriteDirectory - write the current directory in an open TIFF file
SYNOPSIS
#include <tiffio.h>
int TIFFWriteDirectory(TIFF* tif)
DESCRIPTION
Write the contents of the current directory to the file and set up to create a new subfile in the same file. Applications only need to call
TIFFWriteDirectory when writing multiple subfiles to a single TIFF file. TIFFWriteDirectory is automatically called by TIFFClose and TIFF-
Flush to write a modified directory if the file is open for writing.
EXTENDED DESCRIPTION
Diagnostics
All error messages are directed to the TIFFError(3tiff) routine.
Error post-encoding befoBeforeecwritingitthe contents of the current directory, any pending data is flushed. This message indicates that an
error occurred while doing this.
Error flushing data befoBeforeewritingrthe.contents of the current directory, any pending data is flushed. This message indicates that an
error occurred while doing this.
Cannot write directory, Therefwasanot enough space to allocate a temporary area for the directory that was to be written.
Error writing directory Aowrite error occurred when writing the count of fields in the directory.
Error writing directory Aowriteserror occurred when writing the directory fields.
Error writing directory Aiwrite error occurred when writing the link to the next directory.
Error writing data for fAewriteserror occurred when writing indirect data for the specified field.
Error writing TIFF headeA.write error occurred when rewriting header at the front of the file.
Error fetching directoryAcread.error occurred when fetching the directory count field for a previous directory. This can occur when setting
up a link to the directory that is being written.
Error fetching directoryAlread error occurred when fetching the directory link field for a previous directory. This can occur when setting
up a link to the directory that is being written.
RETURN VALUES
1 is returned when the contents are successfully written to the file. Otherwise, 0 is returned if an error was encountered when writing
the directory contents.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWTiff |
+-----------------------------+-----------------------------+
|Interface stability |External |
+-----------------------------+-----------------------------+
SEE ALSO
libtiff(3), TIFFError(3tiff), TIFFOpen(3tiff), TIFFReadDirectory(3tiff), TIFFSetDirectory(3tiff)
NOTES
This man page was originally written by Sam Leffler. Updated by Breda McColgan, Sun Microsystems Inc., 2004.
SunOS 5.10 05 Apr 2004 TIFFWriteDirectory(3tiff)