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Full Discussion: fork problem
Top Forums Programming fork problem Post 96899 by Perderabo on Tuesday 24th of January 2006 01:11:16 PM
Old 01-24-2006
When you write to a file, it is buffered. Each time you fork, the child inherits that buffer with the parents output still in it. The child adds a line to the inherited buffer and exits, which flushes the buffer. Also the children are not guaranteed to exit in the order they were created.
 

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times(2)							System Calls Manual							  times(2)

NAME
times - get process and child process times SYNOPSIS
DESCRIPTION
fills the structure pointed to by buffer with time-accounting information. The structure defined in is as follows: struct tms { clock_t tms_utime; /* user time */ clock_t tms_stime; /* system time */" clock_t tms_cutime; /* user time, children */ clock_t tms_cstime; /* system time, children */ }; This information comes from the calling process and each of its terminated child processes for which it has executed a or The times are in units of 1/seconds, where is processor dependent. The value of can be queried using the function (see sysconf(2)). is the CPU time used while executing instructions in the user space of the calling process. is the CPU time used by the system on behalf of the calling process. is the sum of the and of the child processes. is the sum of the and of the child processes. RETURN VALUE
Upon successful completion, returns the elapsed real time, in units of 1/of a second, since an arbitrary point in the past (such as system start-up time). This point does not change from one invocation of to another. If fails, (clock_t) -1 is returned and is set to indicate the error. Remarks has a granularity of one tick. Processes which run less than one tick may not register any value. ERRORS
fails if buffer points to an illegal address. The reliable detection of this error is implementation dependent. WARNINGS
Not all CPU time expended by system processes on behalf of a user process is counted in the system CPU time for that process. SEE ALSO
time(1), exec(2), fork(2), gettimeofday(2), sysconf(2), time(2), wait(2). STANDARDS CONFORMANCE
times(2)
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