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Old 09-22-2008
Changing what time a process thinks it is with libfaketime
09-22-2008 08:00 AM
With libfaketime you can tell a process that the current time is something different from the machine's system clock. This fake time setting affects not only the functions directly related to reading the system time, but also file timestamps such as modification times. With libfaketime you can test how a program will respond when it is running in the future or in a different timezone without having to change your machine's system clock. Timezone testing can be useful for network applications where a certificate may have already expired in a given timezone but might still work in your local environment.



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LEARN ABOUT OSF1

clock

clock(3)						     Library Functions Manual							  clock(3)

NAME

       clock - Reports CPU time used

LIBRARY

       Standard C Library (libc.so, libc.a)

SYNOPSIS

       #include <time.h>

       clock_t clock (void);

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       clock():  XPG4, XPG4-UNIX

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

DESCRIPTION

       The  clock() function reports the amount of processor time used by the calling process and each of its terminated child processes for which
       a wait function has been executed. When a child process does not wait for its children, its child-process times are  not  included  in  its
       times.

RETURN VALUES

       The  clock()  function returns the amount of processor time (in microseconds) used since the first call to clock().  To convert the time to
       seconds, divide it by CLOCKS_PER_SEC (which is defined to be 1,000,000 in <time.h>).  If the processor time used is not	available  or  its
       value cannot be represented, the clock() function returns (clock_t)-1.

RELATED INFORMATION

       Functions: ctime(3), getrusage(2), times(3), wait(2)

       Standards: standards(5) delim off

																	  clock(3)