The following are examples of sh_syscalls.d.

This is a simple script to count Shell functions, built-ins, external command
executions and system calls.  Here we trace an example program - 
Code/Shell/func_abc.sh.

# sh_syscalls.d -c ./func_abc.sh -o /tmp/out
Function A
Function B
Function C

# cat /tmp/out
Tracing... Hit Ctrl-C to end.

Calls for PID 12966,

 FILE                             TYPE       NAME                      COUNT
 func_abc.sh                      func       func_a                        1
 func_abc.sh                      func       func_b                        1
 func_abc.sh                      func       func_c                        1
 func_abc.sh                      syscall    getrlimit                     1
 func_abc.sh                      syscall    mmap                          1
 func_abc.sh                      syscall    munmap                        1
 func_abc.sh                      syscall    rexit                         1
 func_abc.sh                      syscall    schedctl                      1
 func_abc.sh                      syscall    sigaltstack                   1
 func_abc.sh                      syscall    stat64                        1
 func_abc.sh                      syscall    sysi86                        1
 func_abc.sh                      syscall    access                        2
 func_abc.sh                      syscall    fcntl                         2
 func_abc.sh                      syscall    getgid                        2
 func_abc.sh                      syscall    getpid                        2
 func_abc.sh                      syscall    setcontext                    2
 func_abc.sh                      syscall    sysconfig                     2
 func_abc.sh                      builtin    echo                          3
 func_abc.sh                      cmd        sleep                         3
 func_abc.sh                      syscall    fork1                         3
 func_abc.sh                      syscall    getuid                        3
 func_abc.sh                      syscall    lwp_sigmask                   3
 func_abc.sh                      syscall    open64                        3
 func_abc.sh                      syscall    read                          3
 func_abc.sh                      syscall    write                         3
 func_abc.sh                      syscall    close                         5
 func_abc.sh                      syscall    setpgrp                       5
 func_abc.sh                      syscall    waitsys                       6
 func_abc.sh                      syscall    brk                           9
 func_abc.sh                      syscall    ioctl                        15
 func_abc.sh                      syscall    sigaction                    53

While tracing, three functions were called - func_a(), func_b() and
func_c().  There were 3 instances of the shell built-in 'echo' being called,
and 3 executions of the sleep command (which is probably /usr/bin/sleep - use
the syscall provider to confirm). There were numerous system calls made, 
including 9 brk()'s, 15 ioctl()'s and 53 sigaction()'s.

This script can provide an insight to how a script is interacting
with the system, by providing function calls, commands, built-ins and system 
calls in the same output.

