tldr/pages/sunos/truss.md

truss

Troubleshooting tool for tracing system calls. SunOS equivalent of strace.

• Start tracing a program by executing it, following all child processes:

truss -f {{program}}

• Start tracing a specific process by its PID:

truss -p {{pid}}

• Start tracing a program by executing it, showing arguments and environment variables:

truss -a -e {{program}}

• Count time, calls, and errors for each system call and report a summary on program exit:

truss -c -p {{pid}}

• Trace a process filtering output by system call:

truss -p {{pid}} -t {{system_call_name}}