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getrusage(2) System Calls Manual getrusage(2) NAME getrusage, vtimes - Gets information about resource utilization LIBRARY Berkeley Compatibility Library (libbsd.a): vtimes() only SYNOPSIS #include <sys/resource.h> int getrusage( int who, struct rusage *r_usage); [Digital] The following function declaration does not conform to cur- rent standards and is supported only for backward compatibility: #include <sys/vtimes.h> vtimes( struct vtimes *par_vm, struct vtimes ch_vm); [Digital] Application developers using the getrusage() function may want to specify an #include statement for <sys/time.h> before the one for <sys/resource.h> if programs are being developed for multiple plat- forms. The additional #include statement is not required on DIGITAL UNIX systems or by ISO or X/Open standards, but may be required on other vendors' systems that conform to these standards. STANDARDS Interfaces documented on this reference page conform to industry stan- dards as follows: getrusage(): XPG4-UNIX Refer to the standards(5) reference page for more information about in- dustry standards and associated tags. PARAMETERS Specifies one of the following: Retrieve information about resources used by the current process. Retrieve information about resources used by child processes of the current process. Points to a buffer that will be filled in as described in the sys/resource.h header file. DESCRIPTION The getrusage() function returns information describing the resources used by the current process or its terminated child processes. NOTES The numbers the ru_inblock and ru_outblock fields of the rusage struc- ture account only for real I/O; data supplied by the caching mechanism is charged only to the first process to read or write the data. [Digital] The vtimes() function returns accounting information for the current process and for the terminated child processes of the current process. Either par_vm or ch_vm or both may be zero, in which case only the information for the pointers which are nonzero are returned. After the call, each buffer contains information as defined by the con- tents of the sys/vtimes.h include file. RETURN VALUES Upon successful completion, the getrusage(), function returns 0 (zero). Otherwise, the function returns -1 and sets errno to indicate the er- ror. ERRORS The getrusage() function sets errno to the specified values for the following conditions: The who parameter is not a valid value. [Digi- tal] The address specified for r_usage is not valid. RELATED INFORMATION Functions: wait(2) Routines: gettimer(3), time(3), times(3) Standards: standards(5) delim off getrusage(2)