fprintf(ofp, "\
usage: strace [-CdDffhiqrtttTvVxxy] [-I n] [-a column] [-e expr]... [-o file]\n\
[-p pid]... [-s strsize] [-u username] [-E var=val]...\n\
- [-P path] [PROG [ARGS]]]\n\
+ [-P path] [PROG [ARGS]]\n\
or: strace -c [-D] [-I n] [-e expr]... [-O overhead] [-S sortby] [-E var=val]...\n\
- [PROG [ARGS]]]\n\
+ [PROG [ARGS]]\n\
-c -- count time, calls, and errors for each syscall and report summary\n\
-C -- like -c but also print regular output while processes are running\n\
-D -- run tracer process as a detached grandchild, not as parent\n\
-f -- follow forks, -ff -- with output into separate files\n\
--F -- attempt to follow vforks, -h -- print help message\n\
+-F -- attempt to follow vforks\n\
-i -- print instruction pointer at time of syscall\n\
-I interruptible\n\
1: no signals are blocked\n\
(useful to make 'strace -o FILE PROG' not stop on ^Z)\n\
-q -- suppress messages about attaching, detaching, etc.\n\
-r -- print relative timestamp, -t -- absolute timestamp, -tt -- with usecs\n\
--T -- print time spent in each syscall, -V -- print version\n\
--v -- verbose mode: print unabbreviated argv, stat, termio[s], etc. args\n\
+-T -- print time spent in each syscall\n\
+-v -- verbose mode: print unabbreviated argv, stat, termios, etc. args\n\
-x -- print non-ascii strings in hex, -xx -- print all strings in hex\n\
-y -- print paths associated with file descriptor arguments\n\
+-h -- print help message\n\
+-V -- print version\n\
-a column -- alignment COLUMN for printing syscall results (default %d)\n\
-e expr -- a qualifying expression: option=[!]all or option=[!]val1[,val2]...\n\
options: trace, abbrev, verbose, raw, signal, read, or write\n\