05-18-2008
Unique value added
Guys,
I am trying to get unique numbers which i can use as a primary key in a table. I tried using the <seconds_since_epoch>.<hostname> combination but since more than one process can run on the same machine at the same time, this won't be unique either. Can anyone tell me another way to do this? Thanks.
Regards,
garric
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LEARN ABOUT OSF1
sethostid
sethostid(2) System Calls Manual sethostid(2)
NAME
sethostid - Sets the unique identifier of the current host
SYNOPSIS
int sethostid ( int host_id );
PARAMETERS
Specifies the unique 32-bit identifier for the current host.
DESCRIPTION
The sethostid() function allows a calling process with a root user ID to set a new 32-bit identifier for the current host. The sethostid()
function enables an application program to reset the host ID. The host ID is a unique number that may be used by application programs. It
is usually set to the primary Internet address of the local machine, represented as a network standard byte order integer.
The sethostid() function fails if the calling process does not have superuser privilege.
RETURN VALUES
Upon successful completion, the sethostid() function returns a value of 0 (zero). If the sethostid() function fails, a value of -1 is
returned and errno is set to indicate the error.
ERRORS
If the sethostid() function fails, errno may be set to the following value: The calling process does not have the appropriate privilege.
RELATED INFORMATION
Commands: hostid(1).
Functions: gethostid(2), gethostname(2). delim off
sethostid(2)