need fexecve

[gdamore]

POSIX 2008 / XPG7 require fexecve(), which provides a file descriptor as its first argument, instead of a path.

Note the following considerations:

• While Linux uses /proc/$$/fd/, we cannot -- because /proc grabs locks, and attempts to make this work result in deadlock.
• So a syscall looks best
• However, we can write /proc/$$/fd/ in the uarea as the system image. This will facilitate post mortem analysis in the event of a crash.
• We should take care not to exec() the file appears to be in extended attribute space.

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• Bitbucket: https://bitbucket.org/gdamore/illumos-gate/issue/88
• Originally Reported By: Garrett D'Amore
• Originally Created At: 2014-09-18T01:56:12.186

[gdamore]

fixes #88 need fexecve (fix lint)

→ <<cset 20189e4>>

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Original Comment By: Garrett D'Amore

[gdamore]

fixes #88 need fexecve (fix lint)

→ <<cset 20189e4>>

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Original Comment By: Garrett D'Amore

[gdamore]

fixes #88 need fexecve (codereview feedback)

→ <<cset 0815dd5>>

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Original Comment By: Garrett D'Amore

[gdamore]

fixes #88 need fexecve (codereview feedback)

→ <<cset 0815dd5>>

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Original Comment By: Garrett D'Amore

[gdamore]

fixes #88 need fexecve

→ <<cset 10f26e9>>

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Original Comment By: Garrett D'Amore

[gdamore]

fixes #88 need fexecve

→ <<cset 10f26e9>>

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Original Comment By: Garrett D'Amore