exec.3: Add BUGS section and document non-FreeBSD portability

Requested by: kib (in part)

Clean up execl*(3) manual page prototype formatting

Rendering of execle was missing a comma between the NULL argument and envp.

For unclear reasons, POSIX' definition of these routines comments out

Clean up execl*(3) manual page prototype formatting

Rendering of execle was missing a comma between the NULL argument and envp.

For unclear reasons, POSIX' definition of these routines comments out the
mandatory trailing NULL argument. That seems unnecessary and probably
(reasonably) confuses mdoc.

For unclear reasons, POSIX' definition of these routines spells NULL as
"(char *)0." This is needlessly unclear. One guess might be that POSIX
targets more exotic computer architectures than FreeBSD does. Fortunately,
there is no such problem on any reasonable platform for FreeBSD to support.
Spell NULL as NULL.

The comma was probably removed in r117204 while the comment and creative
spelling of NULL were added in r116537 (both 15 years ago).

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Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <[email protected]>
Pull Request: https://github.com/freebsd/freebsd/pull/96

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Add sbin and /usr/local directories to _PATH_DEFPATH.

Set _PATH_DEFPATH to
/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin. This is the
path in the default class in the default /etc/log

Add sbin and /usr/local directories to _PATH_DEFPATH.

Set _PATH_DEFPATH to
/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin. This is the
path in the default class in the default /etc/login.conf,
excluding ~/bin which would not be expanded properly in a string
constant.

For normal logins, _PATH_DEFPATH is overridden by /etc/login.conf,
~/.login_conf or shell startup files. _PATH_DEFPATH is still used as a
default by execlp(), execvp(), posix_spawnp() and sh if PATH is not set, and
by cron. Especially the latter is a common trap (most recently in PR
204813).

PR: 204813
Reviewed by: secteam (delphij), alfred

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exec(3): Fix COMPATIBILITY section: default path does not contain cwd.

MFC after: 1 week

Turn execvpe() into an internal libc routine.

Adding exevpe() has caused some ports to break. Even though execvpe() is
a useful routine, it does not conform to any standards.

This patch is a little

Turn execvpe() into an internal libc routine.

Adding exevpe() has caused some ports to break. Even though execvpe() is
a useful routine, it does not conform to any standards.

This patch is a little bit different from the patch sent to the mailing
list. I forgot to remove execvpe from the Symbol.map (which does not
seem to miscompile libc, though).

Reviewed by: davidxu
Approved by: philip

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Add POSIX routines called posix_spawn() and posix_spawnp(), which
can be used as replacements for exec/fork in a lot of cases. This
change also added execvpe() which allows environment variable
PATH

Add POSIX routines called posix_spawn() and posix_spawnp(), which
can be used as replacements for exec/fork in a lot of cases. This
change also added execvpe() which allows environment variable
PATH to be used for searching executable file, it is used for
implementing posix_spawnp().

PR: standards/122051

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Per Regents of the University of Calfornia letter, remove advertising
clause.

# If I've done so improperly on a file, please let me know.

Expand *n't contractions.

Sort sections.

mdoc(7): Properly mark C headers.

With the latest mdoc(7), we can now fix the synopsis like this.

Desired by: bde

Add a libc function execvP that takes the search path as an arguement.
Change execvp to be a wrapper around execvP. This is necessary for some
of the /rescue pieces. It may also be more generally app

Add a libc function execvP that takes the search path as an arguement.
Change execvp to be a wrapper around execvP. This is necessary for some
of the /rescue pieces. It may also be more generally applicable as well.

Submitted by: Tim Kientzle <[email protected]>
Approved by: Silence on arch@

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Make the execle() synopsis look (again) like a normal C prototype.
Also fixed the rest of ell (list) functions prototypes to include
a (commented out) terminating null pointer.

Pointed out by: bde
O

Make the execle() synopsis look (again) like a normal C prototype.
Also fixed the rest of ell (list) functions prototypes to include
a (commented out) terminating null pointer.

Pointed out by: bde
Obtained from: POSIX.1-2001
Glanced at by: imp

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Fix the execle(3) synopsis to include the environment pointer.

Confused: anordby

mdoc(7) police: "The .Fa argument.".

mdoc(7) police: "The .Fn function".

mdoc(7) police: Use the new .In macro for #include statements.

begin executed --> being executed

Obtained from: NetBSD

Remove whitespace at EOL.

Remove duplicate words.

mdoc(7) police: Ft/Vt now accept punctuation-type arguments.

Remove fullstops from the end of .Xr lines in SEE ALSO section.

Correct incorrect information about the PATH used for exec*() calls.

PR: 21990
Partially submitted by: Gerhard Sittig <[email protected]>

Whitespace only change: trim trailing whitespace.