When doing the initial open of the proc via procfs, complain if we are
unable to open the /proc/pid/mem file. Otherwise doing a truss on
a nonexistant pid makes us return success even though no such

When doing the initial open of the proc via procfs, complain if we are
unable to open the /proc/pid/mem file. Otherwise doing a truss on
a nonexistant pid makes us return success even though no such process
exists.

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I've been working on this somewhat so I'm moving the
parts I'm touching to be as style(9) compliant as I can.

Move declarations of Procfd to a header file.

Add FBSDID. Do not \n terminate warnx() argument. fprint() -> warnx().

- Use time.h not sys/time.h.
- Fix printf format errors.

Submitted by: bde

Include <sys/time.h> for the declaration of struct timeval. Do not
depend on namespace pollution in <signal.h>. (truss shouldn't be
using timevals anyway, since it was implemented long after timeva

Include <sys/time.h> for the declaration of struct timeval. Do not
depend on namespace pollution in <signal.h>. (truss shouldn't be
using timevals anyway, since it was implemented long after timevals
were obsoleted by timespecs.)

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Allow tracking fork()ed children.

PR: bin/25587 (in part)
MFC after: 3 weeks

Parameterize globals.

PR: bin/25587 (in part)
MFC after: 3 weeks

Partial WARNS=1 fizes with NO_WERROR set to prevent world breakage.
Use __FBSDID().

Back out part of previous commit: remove #include <sys/proc.h>.

#include <sys/proc.h> where needed (for the stop event definitions) and
reorder includes everywhere to conform to style(9).

Handle the case where we truss an SUGID program -- in particular, we need
to wake up any processes waiting via PIOCWAIT on process exit, and truss
needs to be more aware that a process may actually d

Handle the case where we truss an SUGID program -- in particular, we need
to wake up any processes waiting via PIOCWAIT on process exit, and truss
needs to be more aware that a process may actually disappear while it's
waiting.

Reviewed by: Paul Saab <ps@yahoo-inc.com>

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$Id$ -> $FreeBSD$

Calls one or more of malloc(), warn(), err(), syslog(), execlp() or
execvp() in the child branch of a vfork(). Changed to use fork()
instead.

Some of these (mv, find, apply, xargs) might benefit gre

Calls one or more of malloc(), warn(), err(), syslog(), execlp() or
execvp() in the child branch of a vfork(). Changed to use fork()
instead.

Some of these (mv, find, apply, xargs) might benefit greatly from
being rewritten to use vfork() properly.

PR: Loosely related to bin/8252
Approved by: jkh and bde

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Sort Xrefs. Use err(3). Remove uneeded #include.
Correct usage: one of {-p pid, command} is required.
Open output file when command line is fully analyzed: incorrect `truss -o f'
command does not cre

Sort Xrefs. Use err(3). Remove uneeded #include.
Correct usage: one of {-p pid, command} is required.
Open output file when command line is fully analyzed: incorrect `truss -o f'
command does not create an empty file anymore.

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Add some copyright and license terms, at Jordan's request. Note that
syscall.h just refers to another file for the copyright notice.

Change the ioctls for procfs around a bit; in particular, whever possible,
change from

ioctl(fd, PIOC<foo>, &i);

to

ioctl(fd, PIOC<foo>, i);

This is going from the _IOW to _IO ioctl macro. The

Change the ioctls for procfs around a bit; in particular, whever possible,
change from

ioctl(fd, PIOC<foo>, &i);

to

ioctl(fd, PIOC<foo>, i);

This is going from the _IOW to _IO ioctl macro. The kernel, procctl, and
truss must be in synch for it all to work (not doing so will get errors about
inappropriate ioctl's, fortunately). Hopefully I didn't forget anything :).

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Use the new PF_LINGER flag -- when this is set in a process' proc structure,
said process will not have its event mask cleared (and be restarted) on
the last close of a procfs/mem file for that pid.

Use the new PF_LINGER flag -- when this is set in a process' proc structure,
said process will not have its event mask cleared (and be restarted) on
the last close of a procfs/mem file for that pid. This reduces the chance
that a truss-monitored process will be left hanging with these bits set
and nobody looking for it.

This is the least-tested change of all of these, I'm afraid.

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err(3) already includes strerror(errno) and a trailing \n

Set the close-on-exec flag in the child; otherwise, it eats up a
file descriptor that it shouldn't.

Truss program. Requires procfs.

Fix copyright spelling.

PR: 139825
Submitted by: Ruslan Mahmatkhanov

Revert most part of 200420 as requested, as more review and polish is
needed.

Remove unneeded header includes from usr.bin/ except contributed code.

Tested with: make universe

Merge from HEAD