02-26-2002
You can do this :
Input this command into root cron :
30 23 * * * /rotate_syslog
This command execute the rotate_syslog at 23:30 o´clock everyday.
Script /rotate_syslog example :
#! /bin/sh
#
LOG=your_syslog
cd /syslog_path
test -f $LOG.3 && mv $LOG.2 $LOG.4
test -f $LOG.2 && mv $LOG.2 $LOG.3
test -f $LOG.1 && mv $LOG.1 $LOG.2
test -f $LOG.0 && mv $LOG.0 $LOG.1
mv $LOG $LOG.0
cat /dev/null > $LOG
chmod 644 $LOG
Witt
Last edited by witt; 02-27-2002 at 02:40 AM..
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LOG(3) Linux Programmer's Manual LOG(3)
NAME
log, logf, logl - natural logarithmic function
SYNOPSIS
#include <math.h>
double log(double x);
float logf(float x);
long double logl(long double x);
Link with -lm.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
logf(), logl(): _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or cc -std=c99
DESCRIPTION
The log() function returns the natural logarithm of x.
RETURN VALUE
On success, these functions return the natural logarithm of x.
If x is a NaN, a NaN is returned.
If x is 1, the result is +0.
If x is positive infinity, positive infinity is returned.
If x is zero, then a pole error occurs, and the functions return -HUGE_VAL, -HUGE_VALF, or -HUGE_VALL, respectively.
If x is negative (including negative infinity), then a domain error occurs, and a NaN (not a number) is returned.
ERRORS
See math_error(7) for information on how to determine whether an error has occurred when calling these functions.
The following errors can occur:
Domain error: x is negative
errno is set to EDOM. An invalid floating-point exception (FE_INVALID) is raised.
Pole error: x is zero
errno is set to ERANGE. A divide-by-zero floating-point exception (FE_DIVBYZERO) is raised.
CONFORMING TO
C99, POSIX.1-2001. The variant returning double also conforms to SVr4, 4.3BSD, C89.
BUGS
In glibc 2.5 and earlier, taking the log() of a NaN produces a bogus invalid floating-point (FE_INVALID) exception.
SEE ALSO
cbrt(3), clog(3), log2(3), log10(3), log1p(3), sqrt(3)
COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
2010-06-13 LOG(3)