06-19-2007
Sorry,
Even the touch command didnt serve my purpose;
The file I want to clear is always in use. Some program is appending it content always (even for each microseconds).
Any suggestions ?
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LEARN ABOUT FREEBSD
usleep
USLEEP(3) BSD Library Functions Manual USLEEP(3)
NAME
usleep -- suspend process execution for an interval measured in microseconds
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
int
usleep(useconds_t microseconds);
DESCRIPTION
The usleep() function suspends execution of the calling process until either microseconds microseconds have elapsed or a signal is delivered
to the process and its action is to invoke a signal-catching function or to terminate the process. System activity may lengthen the sleep by
an indeterminate amount.
This function is implemented using nanosleep(2) by pausing for microseconds microseconds or until a signal occurs. Consequently, in this
implementation, sleeping has no effect on the state of process timers, and there is no special handling for SIGALRM.
RETURN VALUES
The usleep() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate
the error.
ERRORS
The usleep() function will fail if:
[EINTR] A signal was delivered to the process and its action was to invoke a signal-catching function.
SEE ALSO
nanosleep(2), sleep(3)
HISTORY
The usleep() function appeared in 4.3BSD.
BSD
February 13, 1998 BSD