02-14-2017
Which OS and version are you using? The output from uname -a would be very helpful.
You might find that tail has a -F flag in your version. have a look in the man page and see if it is supported.
I hope that this helps,
Robin
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uname(2) System Calls uname(2)
NAME
uname - get name of current operating system
SYNOPSIS
#include <sys/utsname.h>
int uname(struct utsname *name);
DESCRIPTION
The uname() function stores information identifying the current operating system in the structure pointed to by name.
The uname() function uses the utsname structure, defined in <sys/utsname.h>, whose members include:
char sysname[SYS_NMLN];
char nodename[SYS_NMLN];
char release[SYS_NMLN];
char version[SYS_NMLN];
char machine[SYS_NMLN];
The uname() function returns a null-terminated character string naming the current operating system in the character array sysname. Simi-
larly, the nodename member contains the name by which the system is known on a communications network. The release and version members
further identify the operating system. The machine member contains a standard name that identifies the hardware on which the operating sys-
tem is running.
RETURN VALUES
Upon successful completion, a non-negative value is returned. Otherwise, -1 is returned and errno is set to indicate the error.
ERRORS
The uname() function will fail if:
EFAULT The name argument points to an illegal address.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |Async-Signal-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
uname(1), sysinfo(2), sysconf(3C), attributes(5), standards(5)
SunOS 5.10 21 Jul 1999 uname(2)