PEEKFD

Man Pages


NAME
SYNOPSIS
DESCRIPTION
OPTIONS
FILES
ENVIRONMENT
DIAGNOSTICS
BUGS
AUTHOR
SEE ALSO

NAME

peekfd − peek at file descriptors of running processes

SYNOPSIS

peekfd [−8,−−eight−bit−clean] [−n,−−no−headers] [−f,−−follow] [−d,−−duplicates−removed] [−V,−−version] [−h,−−help] pid [fd] [fd] ...

DESCRIPTION

peekfd attaches to a running process and intercepts all reads and writes to file descriptors. You can specify the desired file descriptor numbers or dump all of them.

OPTIONS

-8

Do no post-processing on the bytes being read or written.

-n

Do not display headers indicating the source of the bytes dumped.

-c

Also dump the requested file descriptor activity in any new child processes that are created.

-d

Remove duplicate read/writes from the output. If you’re looking at a tty with echo, you might want this.

-v

Display a version string.

-h

Display a help message.

FILES

/proc/*/fd

Not used but useful for the user to look at to get good file descriptor numbers.

ENVIRONMENT

None.

DIAGNOSTICS

The following diagnostics may be issued on stderr:
Error attaching to pid ...

An unknown error occurred while attempted to attach to a process.. you may need to be root.

BUGS

Probably lots. Don’t be surprised if the process you are monitoring dies.

AUTHOR

Trent Waddington

SEE ALSO

ttysnoop(8)


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