tracing system calls

[Brent Callaghan]

In article <2040 at cuuxb.ATT.COM>, dlm at cuuxb.ATT.COM (Dennis L. Mumaugh) writes:
> 1).  We have a system call trace program that reports on each and
> every system call a process makes -- useful for support to figure
> out what a program  REALLY  is  doing.

And how!  Actually any SunOs 4.0 user can do that now with
the trace(1) command.

	$ trace date
	open ("/usr/lib/ld.so", 0, 021004) = 3
	read (3, "".., 32) = 32
	mmap (0, 139264, 5, 0x80000002, 3, 0) = 0xedda000
	mmap (0xedfa000, 8192, 7, 0x80000012, 3, 16384) = 0xedfa000
	munmap (0xedde000, 114688) = 0
	open ("/dev/zero", 0, 021112) = 6
	close (3) = 0
	getrlimit (3, 0xefffbc0) = 0
	mmap (0xee00000, 8192, 3, 0x80000012, 6, 0) = 0xee00000
	getuid () = 3497
	getgid () = 10
	open ("/etc/ld.so.cache", 0, 01670000000) = 3
	fstat (3, 0xefffb18) = 0
	mmap (0, 8192, 1, 0x80000001, 3, 0) = 0xedf4000
	close (3) = 0
	open ("/usr/lib/libc.so.0.10", 0, 01667720000) = 3
	read (3, "".., 32) = 32
	mmap (0, 409600, 5, 0x80000002, 3, 0) = 0xed72000
	mmap (0xedd2000, 16384, 7, 0x80000012, 3, 286720) = 0xedd2000
	munmap (0xedb8000, 106496) = 0
	close (3) = 0
	close (6) = 0
	getpagesize () = 8192
	brk (0x225a0) = 0
	brk (0x245a4) = 0
	gettimeofday (0x20558, 0) = 0
	gettimeofday (0x20558, 0) = 0
	open ("/usr/share/lib/zoneinfo/localtim".., 0, 01) = 3
	read (3, "".., 8192) = 754
	close (3) = 0
	ioctl (1, 0x40125401, 0xefff26c) = 0
	write (1, "Thu Sep  1 12:48:29 PDT 1988\n", 29)
	Thu Sep  1 12:48:29 PDT 1988
	= 29
	close (0) = 0
	close (1) = 0
	close (2) = 0
	exit (0) = ?
	$

Made in New Zealand -->  Brent Callaghan  @ Sun Microsystems
			 uucp: sun!bcallaghan
			 phone: (415) 336 6188