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[[!meta copyright="Copyright © 2009 Free Software Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
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[[!tag open_issue_porting]]
Typing `C-c` (*SIGINT*), different versions of *bash* and *screen* respond like
this:
* GNU/Linux; Ubuntu package 3.2-5 / `$BASH_VERSION` is `3.2.48(1)-release`
* plain
* shell prompt: new line / prompt printed; `$?` is 1.
* `sleep 10` running: `^C` printed; SIGINT is sent; `$?` is 130.
* in a *screen* session (Ubuntu package 4.0.3-11ubuntu4): exactly the same.
* GNU/Hurd; Debian package 3.2-6+b1 (equals 3.2-6) / `$BASH_VERSION` is `3.2.48(1)-release`; *libc0.3* Debian package 2.9-25
* plain
* shell prompt: new line / prompt printed; `$?` is 1.
* `sleep 10` running: `^C` printed; SIGINT is sent; `$?` is 130.
* in a *screen* session (Debian package 4.0.3-11): exactly the same.
This is equivalent to the GNU/Linux behavior.
* GNU/Hurd; Debian package 4.0-4 / `$BASH_VERSION` is `4.0.28(1)-release`; *libc0.3* Debian package 2.9-25
* plain
* shell prompt: **`^C`, then new line, then `-bash: echo: write error: (ipc/mig) wrong reply message ID`**, then new line / prompt printed; `$?` is **128**.
* `sleep 10` running: **`^C` printed**, SIGINT is sent; `$?` is 130.
* in a *screen* session (Debian package 4.0.3-11)
* shell prompt: **`^C`, then new line / prompt printed**; `$?` is **128**.
* `sleep 10` running: **`^C` printed**; SIGINT is sent; `$?` is 130.
This differs from the behavior of the earlier *bash* version in the MIG reply
error in the not-*screen* case, and in the **128** value for `$?`. The
former is an error, and the latter may be as expected. (Check GNU/Linux
with that *bash* version.)
* GNU/Hurd; Debian package 4.0-7 / `$BASH_VERSION` is `4.0.33(1)-release`; *libc0.3* Debian packages 2.9-19, 2.9-25, 2.9-27
* plain
* shell prompt: **`^C`, then new line, then `-bash: echo: write error: (ipc/mig) wrong reply message ID`**, then new line / prompt printed; `$?` is **128**.
* `sleep 10` running: `^C` printed; SIGINT is sent; `$?` is 130.
* in a *screen* session (Debian package 4.0.3-11)
* shell prompt: **`^C`**, then new line / prompt printed; `$?` is **128**.
* `sleep 10` running: `^C` printed; SIGINT is sent; `$?` is 130.
This is equivalent to the *bash* 4.0-4 / 4.0.28(1) behavior.
* GNU/Hurd; Debian package 4.0-7 / `$BASH_VERSION` is `4.0.33(1)-release`; *libc0.3* Debian package 2.9-27
* plain
* shell prompt: **`^C`, then new line, then `-bash: echo: write error: (ipc/mig) wrong reply message ID`**, then new line / prompt printed; `$?` is **128**.
* `sleep 10` running: `^C` printed; SIGINT is sent; `$?` is 130.
* in a *screen* session (Debian package 4.0.3-14)
* shell prompt: **no reaction (nothing printed)**; `$?` thus is **unchanged**.
* `sleep 10` running: **`^C` printed**, SIGINT is **not** sent.
The *screen* behavior differs.
To sum up:
* *bash*: 4.0 packages print `^C` at the shell prompt, have the MIG reply
error, and the difference in the value 128 for `$?`.
* *screen*: new package causes that invokee doesn't react to `C-c` anymore.
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