139            Machine faults that stop the process. The specified faults are
 140            added to the set specified by -m. If one of the specified faults is
 141            incurred, truss leaves the process stopped and abandoned (see the
 142            -T option). Default is -M!all.
 143 
 144 
 145        -o outfile
 146 
 147            File to be used for the trace output. By default, the output goes
 148            to standard error.
 149 
 150 
 151        -p
 152 
 153            Interprets the command arguments to truss as a list of process-ids
 154            for existing processes (see ps(1)) rather than as a command to be
 155            executed. truss takes control of each process and begins tracing it
 156            provided that the userid and groupid of the process match those of
 157            the user or that the user is a privileged user. Users can trace
 158            only selected threads by appending /thread-id to the process-id.
 159            Mutiple threads can be selected using the - and , delimiters. For
 160            example /1,2,7-9 traces threads 1, 2, 7, 8, and 9. Processes can
 161            also be specified by their names in the /proc directory, for
 162            example, /proc/12345.
 163 
 164 
 165        -r [!]fd,...
 166 
 167            Shows the full contents of the I/O buffer for each read() on any of
 168            the specified file descriptors. The output is formatted 32 bytes
 169            per line and shows each byte as an ASCII character (preceded by one
 170            blank) or as a 2-character C language escape sequence for control
 171            characters such as horizontal tab (\t) and newline (\n). If ASCII
 172            interpretation is not possible, the byte is shown in 2-character
 173            hexadecimal representation.  (The first 12 bytes of the I/O buffer
 174            for each traced print >read() are shown even      in the absence of -r.)
 175            Default is -r!all.
 176 
 177 
 178        -s [!]signal,...
 179 

 139            Machine faults that stop the process. The specified faults are
 140            added to the set specified by -m. If one of the specified faults is
 141            incurred, truss leaves the process stopped and abandoned (see the
 142            -T option). Default is -M!all.
 143 
 144 
 145        -o outfile
 146 
 147            File to be used for the trace output. By default, the output goes
 148            to standard error.
 149 
 150 
 151        -p
 152 
 153            Interprets the command arguments to truss as a list of process-ids
 154            for existing processes (see ps(1)) rather than as a command to be
 155            executed. truss takes control of each process and begins tracing it
 156            provided that the userid and groupid of the process match those of
 157            the user or that the user is a privileged user. Users can trace
 158            only selected threads by appending /thread-id to the process-id.
 159            Multiple threads can be selected using the - and , delimiters. For
 160            example /1,2,7-9 traces threads 1, 2, 7, 8, and 9. Processes can
 161            also be specified by their names in the /proc directory, for
 162            example, /proc/12345.
 163 
 164 
 165        -r [!]fd,...
 166 
 167            Shows the full contents of the I/O buffer for each read() on any of
 168            the specified file descriptors. The output is formatted 32 bytes
 169            per line and shows each byte as an ASCII character (preceded by one
 170            blank) or as a 2-character C language escape sequence for control
 171            characters such as horizontal tab (\t) and newline (\n). If ASCII
 172            interpretation is not possible, the byte is shown in 2-character
 173            hexadecimal representation.  (The first 12 bytes of the I/O buffer
 174            for each traced print >read() are shown even      in the absence of -r.)
 175            Default is -r!all.
 176 
 177 
 178        -s [!]signal,...
 179