Tracing system calls in HP-UX 11.x

The tool to use is tusc. Available from http://hpux.cs.utah.edu/hppd/hpux/Sysadmin/tusc-7.8/.

1) Download the file (it is in .shar)
2) Unpack is by running (may need to strip off the ^M characters first from the .shar file)
# sh tusc.xx.shar
3) There will be a binary named "tusc" and some other files.
4) tusc -help

Below is the output from tusc -help:

Usage: tusc [-]  -OR- 
       -a: show exec arguments
       -A: append to output file
       -b bsize: dump 'bsize' max bytes (-r/-w)
       -c: count syscalls instead of printing trace
       -d [+][!][fd | all]: select only syscalls using fd
       -e: show environment variables
       -E: show syscall entries
       -f: follow forks
       -F: show kernel's ttrace feature level
       -g: don't attach to members of my session
       -h: show state of all processes when idle
       -i: don't display interruptible syscalls
       -I start[/stop]: single-step and show instructions
       -k: keep alive (wait for *all* processes)
       -l: print lwpids
       -n: print process names
       -o [file|fd]: send trace output to file or fd
       -p: print pids
       -Q: be quiet about some warnings
       -r [!][fd | all]: dump read buffers
       -R: show syscall restarts
       -s [!]syscalls: [un]select these syscalls
       -S [!]signals: [un]select these signals
       -t: detach process if it becomes traced
       -T timestamp: print time stamps
       -u: print user thread IDs (pthreads)
       -v: verbose (some system calls only)
       -V: print version
       -w [!][fd | all]: dump write buffers
       -x: print raw (hex) arguments
       -z: only show failing syscalls

Similar system calls tracing tools exist for other unixes:
AIX: truss
Linux: strace
Linux 64bit: strace32
Solaris: truss