The
utility traces the system calls called by the specified process or program.
Output is to the specified output file, or standard error by default.
It does this by stopping and restarting the process being monitored via
ptrace(2).
The options are as follows:
-f
Trace descendants of the original traced process created by
fork(2),
vfork(2),
etc.
-a
Show the argument strings that are passed in each
execve(2)
system call.
-e
Show the environment strings that are passed in each
execve(2)
system call.
-d
Include timestamps in the output showing the time elapsed
since the trace was started.
-D
Include timestamps in the output showing the time elapsed
since the last recorded event.
-S
Do not display information about signals received by the process.
(Normally,
displays signal as well as system call events.)
-o file
Print the output to the specified
file
instead of standard error.
-s strsize
Display strings using at most
strsize
characters.
If the buffer is larger,
``...
''
will be displayed at the end of the string.
The default
strsize
is 32.
-p pid
Follow the process specified by
pid
instead of a new command.
command [args
]
Execute
command
and trace the system calls of it.
(The
-p
and
command
options are mutually exclusive.)
