*: Replace “user-specified code” with “user-specified program” #629
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In [1], I'd proposed replacing our old "user-specified process" with "user-specified code" to help distinguish between 'create' (cloning the container process) and 'start' (signaling the container process to execve or similar the user-specified $STUFF_FROM_THE_process_CONFIG). That PR was rejected, although the renaming proposed there had already landed via dd0cd21 (Add a 'status' field to our state struct, 2016-05-26, opencontainers#462). This PR attempts to find a common ground between "process" (preferred by maintainers in opencontainers#466 [2,3,4], but which I consider incorrect [5]) and "code" (which maintainers found confusing [3,4,6]). The Linux execve(2) says "program" and unpacks that to "a binary executable, or a script starting with a [shebang]" [7]. proc(5) documents /proc/[pid]/exe by talking about "the executed command" [8]. The POSIX exec docs call this the "process image" and talk about loading it from the "new process image file" (although they also sprinkle in a number of “program” references, apparently interchangeably with “process image”) [9]. POSIX formally defines "command" [11], "executable file" [12], and "program" [13]. The only reference to "process image" in the definitions is in the "executable file" entry. The "command" definition is focused on the shell, the "executable file" definition is focused on files, and the "program" definition talks about a "prepared sequence of instructions to the system", so "program" seems like the best fit. [1]: opencontainers#466 Subject: runtime: Replace "user-specified process" with "user-specified code" in 'create' [2]: opencontainers#466 (comment) [3]: opencontainers#466 (comment) [4]: opencontainers#466 (comment) [5]: http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_295 [6]: opencontainers#466 (comment) [7]: http://man7.org/linux/man-pages/man2/execve.2.html [8]: http://man7.org/linux/man-pages/man5/proc.5.html [9]: http://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html [10]: https://git.kernel.org/cgit/docs/man-pages/man-pages.git/ [11]: http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_104 [12]: http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_154 [13]: http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_306 Signed-off-by: W. Trevor King <wking@tremily.us>
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wking
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After unifying the pre- and post-split hook lifecycle information
(this commit's first parent), merge master to pull in subsequent
mainline evolution.
Conflicts:
runtime.md
The conflicts were primarily due to:
* dd0cd21 (Add a 'status' field to our state struct, 2016-05-26, opencontainers#462).
* 98f0bdf (Add some related docs links, 2016-10-25, opencontainers#596).
* c45ffb4 (*: Replace "user-specified code" with "user-specified
program", 2016-11-18, opencontainers#629).
Signed-off-by: W. Trevor King <wking@tremily.us>
wking
added a commit
to wking/opencontainer-runtime-spec
that referenced
this pull request
Jan 6, 2017
…ecycle
After unifying the pre- and post-split hook lifecycle information
(this commit's first parent), merge master to pull in subsequent
mainline evolution.
Conflicts:
runtime.md
The conflicts were primarily due to:
* dd0cd21 (Add a 'status' field to our state struct, 2016-05-26, opencontainers#462).
* 98f0bdf (Add some related docs links, 2016-10-25, opencontainers#596).
* c45ffb4 (*: Replace "user-specified code" with "user-specified
program", 2016-11-18, opencontainers#629).
Signed-off-by: W. Trevor King <wking@tremily.us>
wking
added a commit
to wking/opencontainer-runtime-spec
that referenced
this pull request
Jan 6, 2017
…ecycle
After unifying the pre- and post-split hook lifecycle information
(this commit's first parent), merge master to pull in subsequent
mainline evolution.
Conflicts:
runtime.md
The conflicts were primarily due to:
* dd0cd21 (Add a 'status' field to our state struct, 2016-05-26, opencontainers#462).
* 98f0bdf (Add some related docs links, 2016-10-25, opencontainers#596).
* c45ffb4 (*: Replace "user-specified code" with "user-specified
program", 2016-11-18, opencontainers#629).
Signed-off-by: W. Trevor King <wking@tremily.us>
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In #466, I'd proposed replacing our old “user-specified process” with “user-specified code” to help distinguish between
create(cloning the container process) andstart(signaling the container process toexecveor similar the user-specified$STUFF_FROM_THE_process_CONFIG). That PR was rejected, although the renaming proposed there had already landed via #462.This PR attempts to find a common ground between “process” (preferred by maintainers in #466, but which I consider incorrect) and “code” (which maintainers found confusing). The Linux
execve(2)says “program” and unpacks that to “a binary executable, or a script starting with a [shebang]”. proc(5) documents/proc/[pid]/exeby talking about “the executed command”. The POSIX exec docs call this the “process image” and talk about loading it from the “new process image file” (although they also sprinkle in a number of “program” references, apparently interchangeably with “process image”).POSIX formally defines “command”, “executable file”, and “program”. The only reference to “process image” in the definitions is in the “executable file” entry. The “command” definition is focused on the shell, the “executable file” definition is focused on files, and the “program” definition talks about a “prepared sequence of instructions to the system”, so “program” seems like the best fit.