12-07-2007
a few issues:
you're asking user to input a date, you then read that date, however after that, you don't reference this input anywhere. shouldn't you be using this for your touch command, instead of: touch -t 00000000 /tmp/timestamp ?
The touch command you have doesn't work, at least here on any of my versions of UNIX.
touch require not only a date, but hrs/mins, so you'll need to reformat input from the read: from the man page:
format is YYMMDDhhmm
touch -t 8907140000 bastille
/tmp $ ll bastille
-rw-r--r-- 1 root sys 0 Jul 14 1989 bastille
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touch(1B) SunOS/BSD Compatibility Package Commands touch(1B)
NAME
touch - change file access and modification times
SYNOPSIS
/usr/ucb/touch [-acfm] file...
DESCRIPTION
touch sets the access and modification times of each file to the current time. file is created if it does not already exist.
OPTIONS
-a Change the access time of file. Do not change the modification time unless -m is also specified.
-c Do not create file if it does not exist.
-f Attempt to force the touch in spite of read and write permissions on file.
-m Change the modification time of file. Do not change the access time unless -a is also specified.
USAGE
See largefile(5) for the description of the behavior of touch when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes).
EXIT STATUS
The following exit values are returned:
0 touch executed successfully and all requested changes were made.
>0 An error occurred. touch returns the number of files for which the times could not be successfully modified.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWscpu |
+-----------------------------+-----------------------------+
SEE ALSO
touch(1), attributes(5), largefile(5)
SunOS 5.10 26 Oct 1995 touch(1B)