Linux in a Nutshell, Fifth Edition

444

|

Chapter 3: Linux Commands

This is the Title of the Book, eMatter Edition

Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.

-O n

Override strace’s built-in timing estimates, and just subtract n

microseconds from the timing of each system call to adjust for

the time it takes to measure the call.

-p pid

Attach to the given process ID and begin tracking. strace can

track more than one process if more than one option -p is

given. Type Ctrl-C to end the trace.

-q Quiet mode. Suppress attach and detach messages from

strace.

-r Relative timestamp. Print time in microseconds between

system calls.

-s n

Print only the first n characters of a string. Default value is 32.

-S value

Sort output of -c option by the given value. value may be calls,

name, time, or nothing. Default is time.

-T Print time spent in each system call.

-t Print time of day on each line of output.

-tt Print time of day with microseconds on each line of output.

-ttt Print timestamp on each line as the number of seconds and

microseconds since the Epoch.

-u username

Run command as username. Needed when tracing setuid and

setgid programs.

-V Print version and exit.

-v Verbose. Do not abbreviate structure information.

-x Print all non-ASCII strings in hexadecimal.

-xx Print all strings in hexadecimal.

strfile

strfile [options] input_file [output_file]

unstr [-c delimiter] input_file[.ext] [output_file]

strfile creates a random-access file ...